Space optical telescope

Abstract

The application provides a space optical telescope, which comprises an optical amplification device, the optical amplification device comprises a light splitting component and a curved surface amplification component, the light splitting component comprises a transmissive-reflection structure and an absorption structure; wherein the transmissive-reflection structure is used for reflecting image light from an image source to the curved surface amplification component to form first light; the curved surface amplification component is used for reflecting the first light to form second light, and the second light reaches an eyebox region after partially penetrating the transmissive-reflection structure and the absorption structure, so that a user's eyes are in the eyebox and see an amplified virtual image.

Description

Technical Field

[0001] This application relates to the field of optical magnification technology, and more particularly to a space optical telescope. Background Technology

[0002] Space optical telescopes, such as desktop telescopes for reading and writing, are designed to provide users with magnified virtual images to aid in viewing content from sources like books and screens. The optical path design of such devices directly affects the device's stability, image quality, and user experience.

[0003] Currently, there are space optical telescopes with different optical path configurations on the market. One type of space optical telescope has a curved mirror above a plane mirror, which results in a high center of gravity and poor stability when the telescope is open, negatively impacting image quality and virtual image stability. Therefore, there is an urgent need for a stable and reliable space optical telescope. Utility Model Content

[0004] This application aims to solve at least one of the technical problems existing in the prior art, and proposes a space optical telescope.

[0005] To achieve the above objectives, embodiments of this application provide a space optical telescope, including an optical magnification device. The optical magnification device includes a beam-splitting component and a curved surface magnification component. The beam-splitting component includes a transmission-reflection structure and an absorption structure; wherein...

[0006] The reflective structure is used to reflect image light from the image source toward the curved magnifying component to form a first ray;

[0007] The curved magnifying component is used to reflect the first light to form a second light, and the second light partially passes through the reflective structure and the absorptive structure to reach the eye box area, so that the user's eyes see a magnified virtual image when they are in the eye box.

[0008] In some embodiments, the image light from the image source is natural light;

[0009] The reflective structure is a planar reflective mirror with a coating layer. The overall reflectivity of the coating layer to natural light is R, and the overall transmittance of the coating layer to natural light is T, and the sum of R and T is equal to 1; the absorptivity of the coating layer is greater than or equal to 0%.

[0010] In some embodiments, the coating layer has different reflectivities for S-polarized light and P-polarized light.

[0011] In some embodiments, the reflectivity of the coating layer for S-polarized light is S1, the reflectivity of the coating layer for P-polarized light is P1, and R = (S1 + P1) / 2; wherein, the reflectivity of the coating layer for S-polarized light is greater than the reflectivity for P-polarized light.

[0012] S1 is greater than or equal to 60% and less than or equal to 90%; P1 is greater than or equal to 40% and less than or equal to 70%; or,

[0013] S1 is greater than or equal to 75% and less than or equal to 85%; P1 is greater than or equal to 45% and less than or equal to 55%.

[0014] In some embodiments, the reflectance of the coating layer to S-polarized light is S1, the reflectance of the coating layer to P-polarized light is P1, and R = (S1 + P1) / 2; wherein, the reflectance of the coating layer to S-polarized light is less than the reflectance to P-polarized light.

[0015] S1 is greater than or equal to 40% and less than or equal to 70%; P1 is greater than or equal to 60% and less than or equal to 90%; or,

[0016] S1 is greater than or equal to 45% and less than or equal to 55%; P1 is greater than or equal to 75% and less than or equal to 85%.

[0017] In some embodiments, the total absorption rate of the absorption structure to natural light is A, where A is greater than 0% and less than or equal to 50%; or, A is greater than or equal to 20% and less than or equal to 40%.

[0018] In some embodiments, the coating layer includes a metal film layer and / or a dielectric film layer.

[0019] In some embodiments, the image light from the image source is S-polarized light; the reflective structure is a plane reflective mirror with a coating layer, wherein the difference between the reflectivity of the coating layer for S-polarized light and 0.5 is less than the difference between the reflectivity of the coating layer for P-polarized light and 0.5; or, the image light from the image source is P-polarized light; the reflective structure is a plane reflective mirror with a coating layer, wherein the difference between the reflectivity of the coating layer for P-polarized light and 0.5 is greater than the difference between the reflectivity of the coating layer for S-polarized light and 0.5.

[0020] In some embodiments, the reflectivity of the coating layer for S-polarized light is greater than or equal to 60% and less than or equal to 90%; or, the reflectivity of the coating layer for S-polarized light is greater than or equal to 75% and less than or equal to 85%; and / or, the reflectivity of the coating layer for P-polarized light is greater than or equal to 40% and less than or equal to 70%; or, the reflectivity of the coating layer for P-polarized light is greater than or equal to 45% and less than or equal to 55%.

[0021] or,

[0022] The coating layer has a reflectivity of 60% or more and 90% or less for P-polarized light; or, the coating layer has a reflectivity of 75% or more and 85% or less for P-polarized light; and / or, the coating layer has a reflectivity of 40% or more and 70% or less for S-polarized light; or, the coating layer has a reflectivity of 45% or more and 55% or less for S-polarized light.

[0023] In some embodiments, the reflective structure is a planar reflective mirror having a substrate and a coating layer, and the absorption structure includes at least one of the following:

[0024] The coating layer having an absorption rate;

[0025] The substrate having an absorption rate;

[0026] An absorbent film layer is attached to the substrate, wherein the absorbent film layer is located on the side of the substrate away from the coating layer, or the absorbent film layer and the coating layer are located on the same side of the substrate, and the absorbent film layer is located on the side of the coating layer away from the curved magnifying component.

[0027] In some embodiments, the absorption structure is a light-absorbing element disposed independently of the reflective structure; the light-absorbing element is located on the side of the reflective structure opposite to the curved magnifying component; or, the reflective structure has a higher reflectivity for the blue light band of the image light than for the green light band; or, the reflective structure is a planar reflective mirror having a substrate and a coating layer, wherein the surface of the substrate opposite to the coating layer is further provided with an anti-reflection coating layer.

[0028] In some embodiments, an absorption film layer is further disposed on the surface of the substrate on the same side as the coating layer, and the absorption film layer is disposed between the substrate and the coating layer.

[0029] In some embodiments, the image light from the image source is linearly polarized light;

[0030] The space optical telescope also includes at least one waveplate for changing the polarization state of light, the waveplate being located between the beam splitter and the curved surface magnification component.

[0031] In some embodiments, the waveplate is a quarter waveplate.

[0032] In some embodiments, a supplementary light is also included for providing supplementary lighting to the image source placement area;

[0033] The supplemental light includes at least one light strip, which includes at least two first light strips disposed on both sides of the transflective structure in a first direction; and / or, at least one second light strip disposed on the bottom side of the transflective structure in a second direction; and / or, at least one third light strip disposed below the curved magnifying component; the first direction is parallel to the left-right direction of the eye box area; the second direction is parallel to the up-down direction of the eye box area.

[0034] In some embodiments, at least one of the light strips includes at least two light sources with different color temperatures, and the color temperature and illuminance of the illuminated area are adjusted by controlling the current of each of the light sources.

[0035] In some embodiments, the light strip includes a light source having a continuous spectral distribution within the visible light wavelength range.

[0036] In some embodiments, at least one of the first light strips includes at least two light sources and an anti-glare component arranged sequentially along the length of the first light strip, wherein the anti-glare component is configured to block light emitted by the light sources from directly incident on the curved magnifying component.

[0037] In some embodiments, the anti-glare component includes a plurality of fin structures arranged sequentially along the length of the first light strip, with at least one light source disposed between two adjacent fin structures. Each fin structure has a first surface facing away from the curved magnifying component and a second surface facing the curved magnifying component.

[0038] The reflectivity of the first surface of each fin structure is greater than 50% or greater than 80%; the reflectivity of the second surface is less than 5% or less than 2%.

[0039] In some embodiments, the first surface is provided with a reflective film to improve its reflectivity.

[0040] In some embodiments, the second surface is an anodized surface, or the second surface is provided with a light-absorbing paint layer, or the second surface is a flocked surface.

[0041] In some embodiments, the first surface of the fin structure has a straight cross-sectional shape along a third direction, or the cross-sectional shape includes an arc or a parabola, and the cross-section along the third direction is perpendicular to the mounting surface of the light strip on which the light source is mounted, and parallel to the length direction of the light strip.

[0042] In some embodiments, the first surface of the fin structure intersects with the second surface;

[0043] The first surface of the fin structure has a cross-sectional shape along a third direction, including an arc or a parabola, wherein the cross-section along the third direction is perpendicular to the mounting surface of the light source on the light strip and parallel to the length direction of the light strip; and / or,

[0044] The fin structure is made of black plastic.

[0045] In some embodiments, the space optical telescope further includes a base and a bracket connected to the base, wherein the curved magnifying component is mounted on the bracket; and the upper end of the beam splitting component is rotatably connected to the curved magnifying component.

[0046] In some embodiments, the beam splitting component further includes a beam splitting mounting housing, the edge of the reflective structure is embedded in the beam splitting mounting housing, the beam splitting mounting housing is provided with a first mounting groove for accommodating the first light strip, and a light-transmitting protective cover is provided at the opening of the first mounting groove.

[0047] In some embodiments, the light-transmitting protective cover is provided with at least one heat dissipation hole.

[0048] In some embodiments, the curved magnifying component includes a curved mounting housing and a curved reflector. The curved mounting housing is connected to the bracket. The curved mounting housing is provided with a third mounting groove for accommodating the third light strip. A reflector is provided in the third mounting groove. The reflector is located on the light-emitting side of the third light strip and is used to reflect the light emitted by the third light strip.

[0049] In some embodiments, the light emission direction of the third light strip and / or the orientation of the reflective surface of the reflector are set to be adjustable.

[0050] In some embodiments, a light-shielding plate detachably disposed on the transflective structure is also included.

[0051] In some embodiments, the light-shielding plate and the transflective structure are detachably connected by a magnetic structure.

[0052] In some embodiments, the magnetic attraction structure includes a magnetic attracting sheet and a magnet, the magnetic attracting sheet being disposed on one of the light-shielding plate and the light-transmitting and reflective structure, and the magnet being disposed on the other of the light-shielding plate and the light-transmitting and reflective structure.

[0053] In some embodiments, the space optical telescope further includes a front cover that can be applied to or removed from the beam splitter;

[0054] The front cover is provided with a storage structure for storing the light shield.

[0055] In some embodiments, the storage structure includes hooks for securing the lower edge of the light-shielding plate; and / or,

[0056] The storage structure includes a magnetic component for attracting and fixing the upper edge of the light-shielding plate.

[0057] In some embodiments, the surface of the front cover near the beam-splitting component is provided with a light-absorbing structure.

[0058] In some embodiments, the curved magnifying component includes a spherical mirror, an aspherical mirror, or a freeform mirror.

[0059] Other objects and features of this application will become clear from reading the specification, claims and drawings. Attached Figure Description

[0060] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0061] Figure 1 This is a schematic diagram of the overall architecture of the space optical telescope 10 provided in the embodiments of this application;

[0062] Figure 2 This is an optical path diagram of the optical magnification device 100 used in the embodiments of this application;

[0063] Figure 3 This is a schematic diagram of the first structure of the planar transflective mirror used in the embodiments of this application;

[0064] Figure 4 This is a schematic diagram of a second structure of the planar transflective mirror used in the embodiments of this application;

[0065] Figure 5 This is a schematic diagram of the third structure of the planar transflective mirror used in the embodiments of this application;

[0066] Figure 6 This is a schematic diagram of the planar reflective mirror and light-absorbing element used in the embodiments of this application;

[0067] Figure 7 This is a schematic diagram of the first structure of the supplementary lighting used in the embodiments of this application;

[0068] Figure 8 This is a schematic diagram of a second structure of the supplementary lighting used in an embodiment of this application;

[0069] Figure 9 This is a schematic diagram of the first structure of the light source with different color temperatures used in the embodiments of this application;

[0070] Figure 10This is a schematic diagram of a second structure for light sources with different color temperatures used in the embodiments of this application;

[0071] Figure 11 This is a schematic diagram of a third structure for light sources with different color temperatures used in the embodiments of this application;

[0072] Figure 12 This is a spectral distribution diagram of the light source used in the embodiments of this application within the visible light wavelength range;

[0073] Figure 13 A schematic diagram of the optical path that generates glare between the first LED strip and the curved magnifying component;

[0074] Figure 14 This is a schematic diagram of the optical path of the first light strip and the curved magnifying component used in the embodiments of this application under the blocking effect of the anti-glare component;

[0075] Figure 15 This is a schematic diagram of the optical path through which the second surface of the anti-glare component used in the embodiments of this application generates glare;

[0076] Figure 16 This is an assembly diagram of the fin structure of the first type used in the embodiments of this application;

[0077] Figure 17 A partial enlarged view of the first surface of the fin structure of the first structure used in the embodiments of this application is shown;

[0078] Figure 18 A partial enlarged view of the first surface of the fin structure of the second structure used in the embodiments of this application is shown;

[0079] Figure 19 This is an optical path diagram of the second fin structure used in the embodiments of this application;

[0080] Figure 20 This is a cross-sectional view along a third direction of the fin structure of the second type used in the embodiments of this application;

[0081] Figure 21 This is a cross-sectional view of the fin structure of the first type used in the embodiments of this application along a third direction;

[0082] Figure 22 This is a structural diagram of the protective cover and the first light strip used in the embodiments of this application;

[0083] Figure 23 This is an optical path diagram of the protective cover with through holes used in the embodiments of this application.

[0084] Figure 24 This is an optical path diagram of the heat dissipation hole sidewall of the protective cover used in the embodiments of this application when the sidewall of the protective cover has a slope.

[0085] Figure 25 This is the optical path diagram of the third lamp strip and reflector used in the embodiments of this application;

[0086] Figure 26 This is a structural diagram of the front cover used in an embodiment of this application;

[0087] Figure 27 This is a side view of the front cover used in an embodiment of this application. Detailed Implementation

[0088] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0089] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0090] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0091] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] Figure 1 A schematic diagram of the overall architecture of the space optical telescope 10 provided in an embodiment of this application is shown. Please refer to... Figure 1 The space optical telescope 10 provided in this application embodiment includes an optical magnification device 100 and a base 12 for supporting the optical magnification device 100. The optical magnification device 100 is used to adjust the direction of at least a portion of the image light emitted from the image source, so that the image light is incident on the eyebox area corresponding to the space optical telescope 10, so that when the user's eye is in the eyebox area, they see a magnified virtual image corresponding to the content of the image source. The base 12 is connected to the optical magnification device 100, for example, via a bracket 11, providing stable support for the bracket 11 and the optical magnification device 100.

[0094] In one application scenario, the space optical telescope 10 can be placed on a desktop. The image source can be a book or a display screen. Taking a book as an example, the light reflected from the book serves as the image light. After passing through the optical magnification device 100, when the user's eyes are within the eye box area, they can see a magnified virtual image of the book directly in front of them. The imaging distance of this virtual image ranges from 1 meter to 10 meters, for example, 3 meters, 5 meters, 8 meters, etc. This allows the user to read without having to look down, effectively protecting their cervical spine and helping to adjust their posture. Furthermore, it effectively adjusts the focus of the user's eyes, thus protecting their eyesight.

[0095] The inventors discovered through research that by placing the curved magnifying component 120 in the optical magnifying device 100 behind the beam splitting component 110 in the space optical telescope 10, the overall stability can be effectively improved. However, this may lead to the problem of the "big face effect," that is, the light reflected from the face is incident on the curved magnifying component 120 and then reflected back into the eye box, so that the user can not only see the magnified virtual image of the image source, but also see the magnified image of their own face, thus interfering with the virtual image that the user needs to view.

[0096] This application provides a space optical telescope 10, which can solve the problems of "big face effect" interference and poor imaging quality caused by the lack of effective stray light suppression methods in the prior art. Figure 2 The optical path diagram of the optical magnification device 100 used in an embodiment of this application is shown. Please refer to... Figure 2 The space optical telescope 10 includes an optical magnification device 100, which includes a beam splitter 110 and a curved magnification device 120. The beam splitter 110 includes a reflective structure and an absorption structure. The reflective structure reflects image light from the image source 130 toward the curved magnification device 120 to form a first light ray. The curved magnification device 120 reflects the first light ray to form a second light ray. The second light ray passes through the reflective structure and the absorption structure and then reaches the eye box area 140 so that the user's eyes see a magnified virtual image when they are in the eye box.

[0097] Specifically, the space optical telescope 10 provided in this application embodiment supports two image sources: the first is a book mode, when the user reads a book placed in the image source placement area (e.g., ...). Figure 1 When a physical book is placed on the bearing surface 12a), as shown, the book is illuminated by an external light source (such as a desk lamp or ambient light), and the reflected image light enters the optical magnification device 100, which "pulls back" and magnifies the book image. Another mode is an electronic screen mode, where a display device (such as a tablet computer) is placed in the image source placement area. This display device emits its own light, and the image light emitted is directly captured by the optical magnification device 100 and processed into a magnified virtual image.

[0098] This application designs a specific optical path sequence of "reflection, transmission, and absorption": A portion of the image light from the image source 130 is reflected by the reflection-transmission structure to the curved magnification component 120, magnified by its reflection, and then returns, with a portion passing through the reflection-transmission structure and the absorption structure, finally reaching the eyebox region 140. The eyebox region 140 specifically refers to the area where the observer's eyes are located, where the magnified virtual image can be seen. The eyebox region 140 has a specific shape and size; even if the observer's eyes deviate from the center of the eyebox region 140 by a certain distance, such as in the vertical or horizontal directions, as long as they remain within the eyebox region 140, the magnified virtual image can be seen. Light reflected from the outside, especially from the user's face, must first pass through the absorption structure to be seen by the user's eyes. A portion of the remaining light then passes through the reflection-transmission structure, is reflected by the curved magnification component 120, and a portion of the reflected light passes through the reflection-transmission structure again, is partially absorbed by the absorption structure, and finally reaches the eyebox. In this process, the absorption and reflection structures can effectively weaken the energy of the reflected light from the face, thereby reducing the brightness of the large face image and making its brightness much lower than the brightness of the normal virtual image of the image source 130, thus suppressing the large face effect.

[0099] This application, through its absorption structure, can effectively attenuate stray light reflected from the user's face and environment that attempts to enter the eye box, thereby suppressing the user's facial virtual image (big face effect) and ambient stray light, providing a clear, comfortable, and interference-free magnified virtual image.

[0100] In existing technology, the space optical telescope 10 has an optical path configuration where the curved reflector is located above the flat reflector. This results in a high center of gravity for the entire device, posing a potential instability risk, and also makes the front cover of the device quite heavy, posing a certain safety hazard. To solve this problem, this application can position the curved magnifying component 120 on the side of the beam splitter 110 away from the eye box area 140. The curved magnifying component 120 can be vertically positioned or slightly tilted relative to the height direction, thereby lowering the center of gravity of the entire device, improving stability, and effectively reducing viewing discomfort caused by the shaking of the curved magnifying component 120.

[0101] In some embodiments, please refer to Figure 3 In the beam-splitting component 110, the transflective structure is a planar transflective mirror having a substrate 111 and a coating layer 112. Based on this, the absorption structure includes at least one of the following: a coating layer 112 having an absorptivity; a substrate 111 having an absorptivity; such as... Figure 4 and Figure 5As shown, the absorption film layer 113 is attached to the substrate 111. The absorption film layer 113 is located on the side of the substrate 111 away from the coating layer 112, or the absorption film layer 113 and the coating layer 112 are located on the same side of the substrate 111. The absorption film layer 113 is located on the side of the coating layer 112 away from the curved magnification component 120, that is, it is located between the coating layer 112 and the substrate 111.

[0102] Specifically, the substrate 111 is the structural body and optical carrier of the planar mirror, providing physical support for the coating layer 112 so that the coating layer 112 can maintain its optical properties. The substrate 111 is optically transparent, allowing light to pass through smoothly. The substrate 111 itself has two surfaces, one surface near the curved magnifying component 120 and the other surface near the eye box region 140. The coating layer 112 is typically deposited on the surface of the substrate 111 near the curved magnifying component 120. In one example, the above-mentioned absorption structure includes a substrate 111 with an absorptivity, that is, the substrate 111 of the planar mirror itself can be absorptive. In this case, while performing the above-mentioned basic functions, the substrate 111 is also reused as an absorption structure to attenuate stray light reflected from the user's face and environment and attempting to enter the eye box, thereby suppressing the user's facial virtual image (large face effect) and ambient stray light.

[0103] The coating layer 112 is a planar reflective mirror that enables reflection and transmission. This coating layer 112 can selectively distribute light according to its source and path; that is, it partially reflects image light from the image source 130 towards the curved magnifying component 120, and partially transmits light returning from the curved magnifying component 120, achieving a "reflect first, then transmit" optical path sequence. In another example, the coating layer 112, while capable of both reflection and transmission, also possesses an absorptive capacity. In this case, the coating layer 112 can also be reused as an absorptive structure.

[0104] In embodiments where the absorptive structure includes a planar reflective mirror and an absorptive substrate 111, the substrate 111 is, for example, gray glass or plastic doped with a light-absorbing substance. The optical path of the image light is as follows: image light from the image source 130 is first reflected by the coating layer 112 of the planar reflective mirror towards the curved magnifying component 120, then reflected back by the curved magnifying component 120, and finally passes through the coating layer 112 and the absorptive substrate 111 to reach the eye box region 140. Stray light from the user's face and the environment first passes through the absorptive substrate 111 and the coating layer 112 of the planar reflective mirror, is reflected by the curved magnifying component 120, then passes through the coating layer 112 again and through the absorptive substrate 111 a second time, finally reaching the eye box region 140. During this process, the light path of ambient stray light (which is a collective term for all unwanted light outside of image light) is different from that of image light, and ambient stray light absorbs more energy. Therefore, the brightness contrast (signal-to-noise ratio) between image light and stray light will be significantly improved. This makes it easier for the human eye to ignore the weakened stray image, thereby effectively reducing the "big face effect" and environmental influences.

[0105] In embodiments where the absorption structure includes a planar reflective mirror and a coating layer 112 with an absorptivity, the coating layer 112 itself reflects or transmits a portion of light while also absorbing a portion of light. Whether it's image light or stray light, as long as it interacts with the coating layer 112 (reflected or transmitted), a certain proportion of absorption occurs. However, the total attenuation of stray light is greater, making it easier for the human eye to ignore the weakened stray image, thereby effectively mitigating the "big face effect" and environmental influences. For example, the coating layer 112 can be a metallic film.

[0106] In other examples, such as Figure 4 and Figure 5 As shown, the absorption structure includes an absorption film 113 bonded to the substrate 111 of the planar mirror. The absorption film 113 is located on the side of the substrate 111 opposite to the coating layer 112, or the absorption film 113 and the coating layer 112 are located on the same side of the substrate 111, and the absorption film 113 is located on the side of the coating layer 112 away from the curved magnifying component 120. Specifically, the absorption film 113 can be prepared on the surface of the substrate 111 of the planar mirror by coating or bonding processes. The absorption film 113 has two configurations: one is located on the side of the substrate 111 opposite to the coating layer 112, and the other is located on the same side of the substrate 111 as the coating layer 112. Regardless of the configuration, the absorption film 113 is closer to the eye box region 140 than the coating layer 112. The above solution also utilizes an asymmetric optical path to absorb stray light on the user side.

[0107] In various examples of the above embodiments, the absorption structure is integrated into the transflective structure. However, the embodiments of this application are not limited to this; in other embodiments, such as... Figure 6 As shown, the absorption structure can function as an independent light-absorbing element 114, located on the side of the transflective structure facing away from the curved magnifying component 120. Light from the user's face (the "big face effect") first strikes this independent light-absorbing element 114. The vast majority of this light is directly absorbed by the absorption element 114, with only a very small portion reflected back, thus effectively mitigating the "big face effect" and environmental influences.

[0108] As described above, the absorption structure has various structures, and in practical applications, these structures can be combined arbitrarily, that is, two or more of the above methods can be used in combination. For example, the absorptive substrate 111 of a plane mirror can be combined with the absorption film layer 113 attached to the substrate 111. Another example is the combination of the absorptive coating layer 112 with the absorption film layer 113 attached to the substrate 111. Other combinations are also possible but will not be elaborated here.

[0109] In some embodiments, the image light emitted by image source 130 is natural light. This applies to scenarios where image source 130 is a book or a non-polarized screen (e.g., an e-ink screen). The image brightness ratio is used below to characterize the utilization efficiency of the light emitted by image source 130. The image brightness ratio is defined as the ratio of the image brightness perceived by the human eye to the brightness emitted by image source 130. Based on optical knowledge, the image brightness ratio of natural light can be approximately calculated using the following formula:

[0110]

[0111] in, The reflectivity of the coating layer 112 of the plane mirror to S-rays; The reflectivity of the coating layer 112 of the plane mirror to P light; The transmittance of S-light through the coating layer 112 of the plane mirror; The transmittance of P-light through the coating layer 112 of the plane mirror; The absorptivity of the plane mirror; Let be the reflectivity of the curved mirror 121.

[0112] The image brightness ratio directly characterizes the proportion of light emitted from the image source 130 and ultimately reaching the user's eye. Increasing this ratio means the system can utilize the light from the image source 130 more efficiently, thus obtaining a brighter visual image with the same image source 130 brightness, or reducing device power consumption to achieve the same perceived brightness. Since the user faces the curved reflector 121, their face forms a clear virtual image in the optical system, as if looking in a mirror. This virtual image (commonly known as a "large face") overlaps with the image, severely interfering with read / write operations. Therefore, this application introduces a "face brightness ratio" to quantify the intensity of this interference, defined as the ratio of the brightness of the virtual face image perceived by the human eye to the brightness emitted by the face itself. However, these two indicators often conflict in practice. For example, simply increasing the reflectivity of a planar reflector may improve image brightness, but it will also enhance the brightness of the virtual face image. Therefore, this application introduces an absorption structure, combined with the reflective properties of the reflective structure, to significantly suppress the virtual face image while maintaining sufficiently high image brightness.

[0113] Based on optical principles, the brightness ratio of a human face can be approximated using the following formula:

[0114]

[0115] Besides the "big face effect," external light sources are another key visual interference factor. Specifically, ambient light (such as overhead lights) above the user illuminates the surface of the planar mirror. A portion of this light is directly reflected by the planar mirror and enters the user's eyes, forming a bright, virtual spot in the field of view. This unexpected stray light significantly reduces the contrast when observing the virtual image, causing the image to appear hazy, details to be blurred, and causing visual discomfort. To quantify this interference, this application defines a "stray light brightness ratio," specifically: the ratio of the brightness of the virtual image formed by a single reflection of ambient light by the planar mirror, as perceived by the human eye, to the brightness of the ambient light source itself. The core of suppressing this stray light lies in effectively controlling the reflection characteristics of the planar mirror and using an absorption structure to attenuate the unexpected light path. This application aims to achieve efficient suppression of external stray light by synergistically optimizing the reflection and absorption structures, thereby ensuring a clear and pure visual experience in any lighting environment. According to optical knowledge, the stray light brightness ratio can be approximately calculated using the following formula:

[0116]

[0117] It should be noted that the optical properties of the plane mirror used in this application are asymmetric. For example... Figure 3As shown, its coating layer 112 is attached to a single side of the substrate 111 (i.e., the side closer to the curved magnifying component 120). This causes significant differences in the reflection and transmission characteristics exhibited when light is incident on the plane mirror from different sides. To accurately describe the optical behavior of this asymmetric structure and establish an effective mathematical model, this application defines the key optical parameters as follows: and These refer to the optical reflectivity and transmittance of the interface of the coating layer 112, respectively. In this embodiment, regardless of the absorptivity of the coating layer 112 itself, its reflectivity and transmittance are calculated separately, and their sum is 1. Furthermore, the reflectivity and transmittance of the coating layer 112 are based on the incident and transmission directions of the image light. Therefore, for natural light and its S and P polarization components, the following approximate relationship exists:

[0118]

[0119]

[0120]

[0121] in, and It describes the properties of the interface, while This refers to the total absorption rate of light by the entire planar mirror. It is a bulk or overall property parameter and is independent of the interfacial properties of the film. The contribution can originate from one or more of the following: minute absorption by the coating layer 112 itself; volume absorption by the substrate 111 of the planar mirror itself; an additional absorption film layer 113 attached to the back side of the substrate 111 (the side away from the coating layer 112); or any combination of the above factors. Therefore, , and There is no direct numerical correlation between the three, nor is there any + = 1. The optical performance model (image brightness ratio, face brightness ratio, stray light brightness ratio) established in this application is based on the above parameter definitions.

[0122] Based on this, taking a planar mirror with a coating layer 112 as an example, the overall reflectivity of the coating layer 112 to natural light is R, and the overall transmittance of the coating layer 112 to natural light is T, and the sum of R and T equals 1; the absorptivity of the coating layer 112 is greater than or equal to 0%. It should be noted that in some examples, the absorption of the coating layer 112 itself can be ignored. Under these conditions, the sum of the overall reflectivity R and the overall transmittance T of the coating layer 112 to natural light is approximately equal to 1 (i.e., R + T ≈ 1). Those skilled in the art will understand that film systems (such as certain dielectric film systems) that meet this condition fall within the scope of protection of this claim. The following theoretical calculations and performance analyses are all based on this relationship. Furthermore, the absorptivity of the coating layer 112 being greater than or equal to 0% means that the coating layer 112 itself may have absorption. When the absorption of the coating layer 112 is 0, R+T=1 holds true perfectly; when the coating layer 112 has absorption, R+T<1, but for the sake of model simplification, it can still be approximated as R+T≈1.

[0123] As described above, the simplified model reveals the intrinsic relationship between performance and parameters, allowing for the neglect of absorption during design to find the optimal ratio of R and T, followed by fine-tuning based on actual film absorption and substrate 111 absorption. Specifically, based on the established optical model (i.e., R+T≈1), this application sets the following four comprehensive performance evaluation criteria to seek the optimal balance between image brightness, face interference, and stray light suppression:

[0124] First, the face brightness ratio is ≤0.11 to ensure that the interference intensity of facial virtual images is below the threshold that can be clearly perceived.

[0125] Secondly, the stray light brightness ratio is ≤0.4, which effectively controls the glare effect from the ambient light above.

[0126] Third, the brightness ratio of the unpolarized image is ≥0.12: ensuring sufficient basic brightness efficiency for natural light image sources 130 (such as books).

[0127] Fourth, the polarization image brightness ratio is ≥0.15, which is used for polarization image sources such as LCDs to achieve higher light energy utilization by utilizing their polarization characteristics.

[0128] Based on the aforementioned four comprehensive performance evaluation criteria, this application screens various optical design schemes, including different types of film systems (dielectric films, metal films, etc.), various reflection / transmission ratios, and various absorptivity. Using an established mathematical model, the test values ​​for each scheme based on the four comprehensive performance evaluation criteria are calculated and then compared with the corresponding standard values. Only schemes that simultaneously meet all four comprehensive performance evaluation criteria are selected and considered usable designs. Therefore, the various schemes proposed below (including different types of film systems (dielectric films, metal films, etc.), various reflection / transmission ratios, and various absorptivity) are derived from the above theoretical calculations and screening results. These schemes are the optimal range for achieving the beneficial effects described in this application, verified by optical models.

[0129] Light is an electromagnetic wave with a vibration direction (i.e., polarization direction), and the reflection and transmission capabilities of optical films for light with different vibration directions (S-rays and P-rays) may differ. Specifically, the electric vector vibration direction of S-polarized light (S-ray) is perpendicular to the plane of incidence, while the electric vector vibration direction of P-polarized light (P-ray) is parallel to the plane of incidence. Based on this, this application sets three parameters for the coating layer 112 of the planar mirror: the first is that the S-ray reflectivity is significantly higher than the P-ray reflectivity, for example, 70% for S-ray and 40% for P-ray. The actual film system corresponding to this parameter is a typical characteristic of dielectric films. Dielectric films are formed by alternating deposition of various non-light-absorbing, highly transparent inorganic materials (such as silicon dioxide and titanium dioxide), and their working principle is the interference effect of light. Due to the intrinsic difference in the optical behavior of S-rays and P-rays in the thin film, dielectric films inherently possess this "polarization selectivity." This film system is suitable for use with image sources 130, such as LCD screens, that emit single-polarized light.

[0130] The second type has a slightly higher S-ray reflectivity than P-ray reflectivity. This coating layer 112 still reflects S-rays more strongly, but the difference in reflectivity between S and P-rays is smaller compared to the first type. For example, the S-ray reflectivity is 60%, and the P-ray reflectivity is 40%. This parameter corresponds to a dielectric film with weak polarization dependence in the actual film system, or a hybrid film system that balances S-ray and P-ray performance (possibly incorporating some metal films). This film system is a compromise. When the image source 130 is natural light (such as light reflected from a book, encompassing all polarization directions), using this film system can avoid excessive waste of light in a certain polarization direction due to excessive polarization dependence, resulting in a more balanced overall light efficiency.

[0131] The third type has a higher P-light reflectivity than S-light reflectivity. Unlike typical dielectric films, this coating layer 112 reflects P-light more strongly than S-light. For example, its P-light reflectivity is 70%, while its S-light reflectivity is 50%. This parameter corresponds to a typical characteristic of metallic films. Metals (such as aluminum, silver, and chromium) themselves act as mirrors, exhibiting slight differences in their S-light and P-light reflection characteristics, typically showing a slightly higher P-light reflectivity. More importantly, metallic films inherently absorb some light energy while reflecting and transmitting. Metallic films possess both reflective and absorptive functions (i.e., absorptivity greater than 0%), thus eliminating the need for an additional absorbing film layer 113 or an absorptive substrate 111. Metallic films are generally insensitive to the polarization state of incident light, exhibit stable performance, and may have lower costs.

[0132] As mentioned above, the reflectivity of coating layer 112 differs for S-polarized light and P-polarized light. As calculated and screened above, when the image source 130 is polarized light, this type of film system can improve the polarization image brightness ratio. For natural light image source 130, S-light reflectivity and P-light reflectivity can be two independent optimization variables. This provides greater flexibility than a basic model with only one variable (reflectivity R), and makes it more likely to find a better balance between image brightness, face suppression, and stray light suppression.

[0133] In some embodiments, the reflectance of the coating layer 112 to S-polarized light is S1, and the reflectance of the coating layer 112 to P-polarized light is P1, and R = (S1 + P1) / 2; wherein the reflectance of the coating layer 112 to S-polarized light is greater than the reflectance to P-polarized light. Based on this, in some examples, S1 is greater than or equal to 60% and less than or equal to 90%; P1 is greater than or equal to 40% and less than or equal to 70%. In other examples, S1 is greater than or equal to 75% and less than or equal to 85%; P1 is greater than or equal to 45% and less than or equal to 55%. Preferably, S1 = 80%, P1 = 50%. The parameters of the coating layer 112 satisfy the first and second parameterization settings described above, and the coating layer 112 can be a dielectric film. The above parameter range can achieve better overall optical performance (higher image brightness ratio and lower face / stray light brightness ratio).

[0134] In other embodiments, the reflectance of the coating layer 112 to S-polarized light is S1, and the reflectance of the coating layer 112 to P-polarized light is P1, and R = (S1 + P1) / 2; wherein the reflectance of the coating layer 112 to S-polarized light is less than the reflectance to P-polarized light. Based on this, in some examples, S1 is greater than or equal to 40% and less than or equal to 70%; P1 is greater than or equal to 60% and less than or equal to 90%. In other examples, S1 is greater than or equal to 45% and less than or equal to 55%; P1 is greater than or equal to 75% and less than or equal to 85%. The parameters of the coating layer 112 satisfy the third parameterization setting described above, and the coating layer 112 can be a metal film. The above parameter range covers the performance optimization range of the metal film.

[0135] Furthermore, to quantify the performance of the absorption structure and ensure its effective suppression of stray light, the total absorptivity of the absorption structure to natural light is set to A. In some examples, A is greater than 0% and less than or equal to 50%. In other examples, A is greater than or equal to 20% and less than or equal to 40%. As mentioned above, the total absorptivity A directly participates in the calculation of the stray light and face brightness ratio. The larger A is, the better the suppression effect, but it will also slightly reduce the image brightness. The above parameter range of A can achieve the best balance between suppressing stray light and maintaining image brightness.

[0136] As described above, the coating layer 112 may include a metal film layer, a dielectric film layer, or a combination of a metal film layer and a dielectric film layer.

[0137] For example, an example of a coating layer 112 has the following material composition:

[0138] Low refractive index layer: made of silicon dioxide (SiO2) with a refractive index of 1.40-1.48 (visible and near-infrared bands); this low refractive index layer has the advantages of excellent chemical stability and strong adhesion to the glass substrate.

[0139] High refractive index layer: Titanium pentoxide (Ti3O5) or niobium pentoxide (Nb2O5) is used, with a refractive index of 2.2-2.45 (visible and near-infrared bands). This high refractive index layer has the characteristic of strong optical control capability.

[0140] Membrane structure:

[0141] The total number of film layers is 12-25, using an alternating stacking method of "SiO2 layer → Ti3O5 / Nb2O5 layer". Starting from the surface of the glass substrate, the first layer can be a SiO2 layer (to achieve optical transition with the substrate), and the last layer can be either a SiO2 layer or a Ti3O5 / Nb2O5 layer depending on optical requirements. The total coating thickness is 1-3 micrometers. Specifically, when the number of film layers is 12-15, the total thickness is controlled at 1-2 micrometers; when the number of film layers is 16-25, the total thickness is controlled at 2-3 micrometers to avoid optical effect imbalance caused by excessively large or small single layer thickness.

[0142] This coating layer 112 can be used with a P-polarized light source, which has good imaging effect.

[0143] For example, another example of coating layer 112 is as follows: Material composition:

[0144] The coating material system consists of four types: low refractive index layer, medium refractive index layer, high refractive index layer and metal layer. By complementing the optical properties of different materials, multiple functions such as refractive index matching, polarization state and band control of light can be achieved.

[0145] Low refractive index layer: silicon dioxide (SiO2), refractive index: 1.40-1.48. It has strong adhesion to the glass substrate (refractive index about 1.5), which can prevent the film from peeling off and cracking. It has excellent chemical stability and is resistant to corrosion from humid, acid and alkali environments, thus extending the life of the device. Its low refractive index can serve as a "buffer layer" between the substrate and other high / medium refractive index layers, reducing interface reflection loss.

[0146] Medium refractive index layer: aluminum oxide (Al2O3), refractive index: 1.62-1.70 (typical value, visible light band). It can fill the refractive index difference between SiO2 (1.40-1.48) and high refractive index materials (2.2-2.45), optimize the optical matching between film layers, reduce interface interference disorder, have strong physical stability, enhance the overall compactness of multilayer films, and reduce film stress caused by abrupt changes in material refractive index.

[0147] High refractive index layer: titanium pentoxide (Ti3O5) and / or niobium pentoxide (Nb2O5), refractive index: 2.2-2.45. The high refractive index can efficiently change the ratio of light reflection and transmission, which is the key to realizing functions such as anti-reflection and light filtering; the two materials can be flexibly replaced according to the target wavelength (such as visible light / near infrared sub-range) to adapt to different optical performance requirements.

[0148] Metal layer: Silver (Ag), with strong polarization sensitivity, can selectively change the polarization state of incident light (such as converting natural light into linearly polarized light or adjusting the polarization direction), suitable for polarization imaging, 3D display and other scenarios; it also has certain electrical properties and can be used in devices that require "optical-electrical" integration (such as touch screen optical films).

[0149] Based on the alternation of low and high refractive indices, the film structure incorporates medium refractive index Al2O3 and metallic Ag layers. By combining materials more precisely, optical performance and structural stability are balanced. The basic unit is cyclically stacked based on the principle of "SiO2 (low) → Al2O3 (medium) → Ti3O5 / Nb2O5 (high) → Ag (metal)" (or the insertion position of the Ag layer is adjusted according to polarization requirements). The gradient transition of "low-medium-high" refractive index reduces interface loss, while polarization control is achieved through the Ag layer.

[0150] The total number of film layers ranges from 12 to 15, and the total coating thickness is controlled within the range of 1 to 2 micrometers. The thickness of a single layer is controlled to avoid the Al2O3 / Ag layer being too thick (e.g., an excessively thick Ag layer can easily lead to increased light absorption) or too thin (e.g., an excessively thin Ag layer cannot effectively control polarization). When the number of layers is small, thickness matching is used to ensure a smooth transition of the "low-medium-high" refractive index gradient and avoid the loss of optical functions.

[0151] Alternatively, the total number of film layers can be 16-25, and the total coating thickness can be controlled within the range of 2-3 micrometers. When the number of layers increases (such as when multiple Ag layers need to be inserted to enhance polarization control), the effective thickness of each layer (especially the Al2O3 buffer layer and Ag functional layer) can be ensured by increasing the thickness. This avoids the overall weight of the film layer from being too large, prevents the adhesion to the substrate from decreasing, and reduces the risk of peeling.

[0152] This coating layer 112 can be used with an image source that emits S-polarized light to achieve a better virtual image effect.

[0153] In the embodiment where the image light from image source 130 is S-polarized light and the reflective structure is a planar reflective mirror with a coating layer 112, the difference between the reflectivity of the coating layer 112 for S-polarized light and 0.5 is less than the difference between the reflectivity of the coating layer 112 for P-polarized light and 0.5. The goal of this scheme directly corresponds to the aforementioned screening criterion of a polarization image brightness ratio ≥ 0.15. The reflectivity of the coating layer 112 for S-polarized light is further away from 0.5, while its reflectivity for P-polarized light is closer to 0.5.

[0154] In the embodiment where the image light from image source 130 is P-polarized light and the reflective structure is a planar reflective mirror with a coating layer 112, the difference between the reflectivity of the coating layer 112 for P-polarized light and 0.5 is greater than the difference between the reflectivity of the coating layer 112 for S-polarized light and 0.5. The goal of this scheme directly corresponds to the aforementioned screening criterion of a polarization image brightness ratio ≥ 0.15. The further the reflectivity of the coating layer 112 is from 0.5 for P-polarized light, and the closer its reflectivity and transmittance for S-polarized light are to 0.5, the higher its efficiency.

[0155] Specifically, for images with polarized light, such as P-polarized light, the closer the reflectivity and transmittance of the coating layer 112 to P-polarized light are to 0.5, the higher the efficiency and the higher the brightness of the virtual image. Similarly, when the image light is S-polarized light, the closer the transmittance and reflectivity of the coating layer 112 to S-polarized light are to 0.5, the higher the efficiency.

[0156] Based on this, the specific and feasible parameters provided by the above-mentioned polarization image source 130 scheme are as follows:

[0157] In an embodiment where the image light from image source 130 is S-polarized light, in one example, the reflectivity of coating layer 112 for S-polarized light is greater than or equal to 60% and less than or equal to 90%. Preferably, the reflectivity of coating layer 112 for S-polarized light is greater than or equal to 75% and less than or equal to 85%. The reflectivity of coating layer 112 for P-polarized light is greater than or equal to 40% and less than or equal to 70%; preferably, the reflectivity of coating layer 112 for P-polarized light is greater than or equal to 45% and less than or equal to 55%. Both of the above examples can be used, or only one example can be selected.

[0158] In an embodiment where the image light from image source 130 is P-polarized light, in one example, the reflectivity of coating layer 112 for P-polarized light is greater than or equal to 60% and less than or equal to 90%; preferably, the reflectivity of coating layer 112 for P-polarized light is greater than or equal to 75% and less than or equal to 85%. The reflectivity of coating layer 112 for S-polarized light is greater than or equal to 40% and less than or equal to 70%; preferably, the reflectivity of coating layer 112 for S-polarized light is greater than or equal to 45% and less than or equal to 55%. Both of the above examples can be used, or only one example can be selected.

[0159] For example, in an example where the reflectivity of S-polarized light is greater than that of P-polarized light, the overall reflectivity of natural light is 0.6, the reflectivity of P-polarized light is 0.45 (corresponding transmittance is 0.55), and the reflectivity of S-polarized light is 0.75 (corresponding transmittance is 0.25). Assuming the reflectivity of the curved magnifying component is 0.9, the brightness ratio of the face is 0.105, the brightness ratio of the P-polarized image source is 0.1782, the brightness ratio of the S-polarized image source is 0.135, and the brightness ratio of the unpolarized image source is 0.1566. It can be seen that the virtual image brightness of the P-polarized image source in this example is higher.

[0160] In some embodiments, the reflective structure has a higher reflectivity for the blue light band of the image light than for the green light band. The light emitted by the image source 130 (such as an LCD screen) and the supplementary light (using full-spectrum LEDs) contains high-energy short-wavelength blue light. Prolonged exposure to this type of light may cause visual fatigue, digital eye strain, and even affect the user's circadian rhythm. To address this problem, this application achieves a higher reflectivity for the blue light band of the image light by making the reflective structure more reflective, preferentially reflecting a portion of the blue light emitted from the image source 130 to non-optical paths, thereby reducing the total dose of blue light reaching the human eye. Furthermore, components such as the curved magnification component 120 and the substrate 111 may have different absorption and reflection characteristics for different wavelengths of light, which may lead to undesirable color shifts in the final image. For example, the system as a whole may absorb slightly more blue light, resulting in a yellowish tint to the image. In response, this application compensates for potential blue light loss in other parts of the system by making the transflective structure have a higher reflectivity for the blue light band in the image light, thus ensuring the color balance and accuracy of the final image and making the virtual image color more realistically reproduce the original color of the image source.

[0161] In embodiments where the reflective structure is a planar reflective mirror with a substrate 111 and a coating layer 112, selective modulation of specific wavelengths can be achieved by utilizing the interference effect of the coating layer 112 or the dispersion characteristics of the material itself. For example, by designing the thickness, number of layers, and material of the coating layer 112, it can be made to produce stronger constructive interference reflection at specific wavelengths (such as blue light), while having relatively low reflectivity at other wavelengths (such as green light). A significant proportion of the blue light component in the image light emitted from the image source 130 is reflected when it first encounters the coating layer 112, preventing it from entering the subsequent optical path, which directly reduces the blue light energy entering the eye box. Furthermore, stray blue light from ambient lighting and supplementary lighting is also suppressed by stronger reflection on the coating layer 112.

[0162] In some embodiments, the reflective structure is a planar reflective mirror having a substrate 111 and a coating layer 112, and an anti-reflective coating is also provided on the surface of the substrate 111 facing away from the coating layer 112. This anti-reflective coating can reduce reflection on the side of the reflective structure closer to the eye box, thereby increasing the light energy ultimately transmitted to the eye box. When the second light reflected from the curved magnifying component 120 passes through the substrate 111 and reaches the interface between the substrate 111 and the air (the side closer to the user), a small amount of energy is reflected back by this interface. This reflected light propagates in the reverse direction and forms a weak, misaligned secondary image, or "ghosting," within the optical system (e.g., reflected again by the curved magnifying component 120 or the planar reflective mirror), reducing image contrast and sharpness. The small amount of energy reflected back also directly leads to the loss of useful image light energy, resulting in a decrease in the brightness of the image ultimately reaching the eye box. To address this issue, this application applies one or more antireflective coatings of specific refractive index and thickness to the surface of the substrate 111, thereby reducing interface reflectivity and eliminating ghosting caused by reflection. This results in a purer and sharper virtual image, significantly improving the viewing quality. Furthermore, by redirecting the light energy that was originally lost back into the imaging optical path, the brightness of the final image reaching the eyepiece is directly increased.

[0163] In some embodiments, the space optical telescope 10 further includes at least one waveplate for changing the polarization state of light, the waveplate being located between the beam splitter 110 and the curved magnification member 120. Further, the waveplate is a quarter-waveplate.

[0164] It should be understood that the waveplate scheme used in this embodiment is suitable for unpolarized image sources 130 (i.e., natural light image sources). For example, when the image source 130 is a book, its reflected light is natural light, containing all polarization directions. This natural light contains polarization components that match the optical system design, which can be reflected by the coating layer 112 and converted into a highly transmittance polarization state through the waveplate and curved surface magnification component 120, thereby achieving the purpose of improving light efficiency. Specifically, the natural light reflected from the book illuminates the plane mirror. Among them, the S-polarized light is reflected by the coating layer 112 towards the curved surface magnification component 120, while most of the P-polarized component is transmitted (lost). The reflected S-polarized light is converted into circularly polarized light after passing through the quarter waveplate. This circularly polarized light is reflected by the curved surface magnification component 120, and its rotation direction is reversed. The reversed circularly polarized light passes through the quarter waveplate again and is converted back into linearly polarized light, with its polarization direction rotated by 90°, becoming P-polarized light. The P-polarized light reaches the plane mirror again. Because the coating layer 112 has high transmittance for P-polarized light, most of the light will pass through the coating layer 112 and eventually reach the eye box. In this embodiment, the S-polarized light in natural light is converted into P-polarized light after reflection by a waveplate, which improves the overall light energy utilization efficiency (image brightness ratio) from the unpolarized image source 130 to the eye box.

[0165] In summary, the space optical telescope of this application improves imaging performance by optimizing the optical path structure, placing the curved magnification component behind the beam splitter, and combining this with optimized transmission-reflection and absorption structures. In particular, the coating layer 112 of the transmission-reflection structure in this application is optimized for both natural and polarized light. Through optimized design and adjustment of the coating layer, its transmittance and reflectance for S-light can differ from those for P-light, thereby achieving better imaging results.

[0166] In some embodiments, the space optical telescope 10 further includes a supplementary light for illuminating the image source placement area. The supplementary light includes at least one light strip. See also... Figure 7 These light strips can be positioned in at least one of the following locations: the light strip positioned in the first location is referred to as the first light strip 131, and there are at least two first light strips 131, wherein the first location is where the light-splitting component 110 has a reflective structure in the first direction ( Figure 7 At least one first light strip 131 can be provided on each of the two sides (in the X direction). This first direction is parallel to the left-right direction of the eye box region 140, i.e., parallel to... Figure 7 The direction of the X-axis. Taking the outline shape of the reflective structure as a rectangle as an example, each first light strip 131 can be extended along the side edges of the reflective structure in the first direction (that is...). Figure 7 When the beam splitter 110 is placed vertically, the first light strip 131 extends in the vertical direction. The light strip located at the second position is called the second light strip 132, and there is at least one second light strip 132. The second position has a reflective structure in the second direction (…). Figure 7 The second direction is located on the bottom side of the eye box area 140 in the Z-direction, and is parallel to the vertical direction of the eye box area 140. Figure 7 The direction of the Z-axis. Taking the outline shape of the reflective structure as a rectangle as an example, each second light strip 132 can extend along the direction parallel to the bottom side edge of the reflective structure. The light strip set at the third position is called the third light strip 133, and there is at least one third light strip 133. The third position is the position below the curved surface magnification component 120. Taking the outline shape of the curved surface magnification component 120 as a rectangle as an example, each third light strip 133 can extend along the bottom side edge of the curved surface magnification component 120. It should be noted that... Figure 7 The structure of the curved surface magnification component 120 is only schematically shown; in reality, as shown... Figure 1 As shown, the curved magnifying component 120 may include a curved mounting housing 122 and a curved reflector 121. In this case, the third LED strip 133 is actually mounted on the curved mounting housing 122 and located below the curved reflector 121. The specific mounting method of the third LED strip 133 will be described in detail later.

[0167] For the space optical telescope 10, its typical usage scenario is indoors. Without supplemental lighting, the brightness of the reflected light from the ambient light shining on the book or screen, after passing through the beam splitter 110 and the curved magnification component 120, may be too low to reach the human eye, rendering it unusable in dim environments and severely limiting its application scenarios. Existing technologies typically employ unidirectional illumination (such as only a top light or a single-sided light), resulting in heavy shadows on the user's hand and pen tip, directly obscuring the image source placement area and interfering with reading and writing. Moreover, a single light source is unlikely to achieve uniform illumination distribution across the entire image source placement area (book / screen), potentially resulting in a bright center and dark edges.

[0168] To address the aforementioned issues, this application can provide at least two first light strips 131 at the first position, or provide corresponding light strips at any two of the first, second, and third positions. This allows for multi-angle light sources to illuminate the image source placement area from at least two directions. When a light source is blocked by a hand, creating a shadow, light from at least one other light source will fill the shadow area from other angles, thus softening and eliminating the shadow. Specifically, the first light strips 131 positioned on both sides of the reflective structure in the first direction can avoid the main activity area of ​​the user's hand (front), solving the problems of hand obstruction and excessive heat due to proximity to the hand. The second light strip 132 positioned on the bottom side of the reflective structure in the second direction, and the third light strip 133 positioned below the curved magnifying component 120, can provide supplementary lighting from below, further filling in any vertical shadows that may be generated by light from the left and right sides, and ensuring the uniformity of illumination in the lower half of the image source placement area. Of course, in practical applications, one or more combinations of the first, second, and third light strips can be selectively provided according to specific needs. For example... Figure 7 An example with a first, second, and third light strip is shown; Figure 8 An example with the first and third light strips is shown, omitting the second light strip 132.

[0169] In some embodiments, such as Figure 9 As shown, the light strip may include a strip light panel 134 and a plurality of light sources 135 mounted on the strip light panel 134, the light sources 135 being, for example, LED lights. The plurality of light sources 135 may be arranged in at least one row along the length of the strip light panel 134. Figure 9 Two rows of light sources 135 are shown. At least one light strip includes at least two light sources 135 with different color temperatures, for example, Figures 9 to 11 Two light sources 135 with different color temperatures are shown, namely a first color temperature light source 135a and a second color temperature light source 135b. In some examples, such as... Figure 9 As shown, the first color temperature light source 135a is located in the same row, and the second color temperature light source 135b is located in the same row. In other examples, such as Figure 10 As shown, in the same row of light sources 135, the first color temperature light source 135a and the second color temperature light source 135b are arranged alternately along the length of the strip light panel 134; and the two light sources 135 in the same column have the same color temperature, that is, both are the first color temperature light source 135a or both are the second color temperature light source 135b. In some other examples, such as Figure 11 As shown, in the same row of light sources 135, the first color temperature light source 135a and the second color temperature light source 135b are arranged alternately along the length of the strip light panel 134; and the two light sources 135 in the same column have different color temperatures, that is, one of them is the first color temperature light source 135a and the other is the second color temperature light source 135b.

[0170] By controlling the current of each light source 135, the color temperature and illuminance of the illuminated area can be adjusted. A single, fixed color temperature (e.g., providing only 5000K cool white light) cannot adapt to all usage scenarios. Users may prefer soft, warm yellow light to relax when reading novels, while they may need bright cool white light to maintain focus and clarity when doing detailed writing or drawing. Based on this, this application, by including at least two light sources 135 with at least two different color temperatures in at least one light strip, allows the lighting to adapt to human activities and physiological rhythms, meeting diverse scenario needs. Furthermore, in some embodiments, warm yellow light and cool white light can be mixed in different intensity ratios based on the principle of light mixing to produce a continuous color temperature spectrum between the two. By controlling the luminous intensity of at least two basic color temperature light sources 135, white light with a preset color temperature value can be synthesized.

[0171] In some embodiments, the current flowing to light sources 135 of different color temperatures can be independently adjusted by the control circuit to change the luminous intensity of the light sources 135, thereby adjusting the illuminance and affecting the color temperature of the mixture. While maintaining a roughly constant total brightness, changing the current ratio of the light sources 135 of different color temperatures can achieve color temperature switching. For example, driving a 3000K light source 135 with 100% current and a 5000K light source 135 with 0% current yields a color temperature of 3000K; similarly, driving a 3000K light source 135 with 50% current and a 5000K light source 135 with 50% current yields a color temperature of approximately 4000K.

[0172] Ordinary white LED lights typically achieve their effect by exciting YAG yellow phosphors using blue LED chips. Their spectral characteristics include a strong blue peak around 450nm, a broad yellow peak between 550-600nm, and severely insufficient spectral energy in other wavelengths (such as deep red, deep blue, and cyan). This discontinuous spectrum causes illuminated objects to fail to reflect their true colors. Under ordinary LED lighting, colors appear distorted, dull, and lack vibrancy when viewing books or objects. Reds, in particular, appear dim, and color reproduction is inaccurate. The spectral characteristics of the supplementary light directly determine the color rendering of reflective image sources (such as books). If the supplementary light has poor color rendering, even if the image from the space optical telescope 10 is very clear, the user will only see a distorted, virtual image. To address this problem, in some embodiments, the light strip includes a light source 135, which has a continuous spectral distribution within the visible light wavelength range. Figure 12 As shown, the term "continuous spectral distribution within the visible light wavelength range" means that the spectral power distribution of the light source 135 exhibits a smooth and continuous characteristic within the wavelength range of 400nm to 780nm, without the sharp peaks and deep valleys characteristic of ordinary white LED lamps. This light source 135 is, for example, a full-spectrum LED lamp. The general color rendering index Ra of the light source 135 is typically greater than 90, preferably greater than 95. Furthermore, in its normalized spectral power distribution curve, within the range of 480nm to 680nm, the difference between adjacent peaks and valleys does not exceed 20% of the maximum spectral power. This continuous spectral distribution allows the light source 135 to simulate the color rendering characteristics of natural light, providing users with high-quality lighting that offers accurate color reproduction and visual comfort.

[0173] In an embodiment where the reflective structure has first light strips 131 arranged on both sides in the first direction, such as Figure 13 As shown, since the first light strip 131 is opposite to the curved magnifying component 120, the light emitted by the first light strip 131 (such as...) Figure 13 The red arrow shown directly illuminates the curved magnifying component 120 and is reflected directly into the user's eye. When observing the magnified virtual image, the user will see several extremely bright and glaring LED images in their field of vision. This direct glare not only causes severe discomfort but may even cause momentary blindness, completely destroying the observation effect and rendering the supplementary light unusable. To solve this problem, such as... Figure 14 As shown, at least one first light strip 131 includes at least two light sources 135 and an anti-glare component 136 arranged sequentially along the length direction of the first light strip 131 (i.e., the length direction of the strip light panel 134). The anti-glare component 136 is configured to block the light emitted by the light source 135 from directly incident on the curved surface magnification component 120. The light emitted by the light source 135 is as follows: Figure 14As shown by the red dashed arrow, it will not illuminate the curved magnifying component 120 under the shielding effect of the anti-glare component 136.

[0174] Specifically, an anti-glare component 136 is provided in the direct optical path between the light source 135 of the first light strip 131 and the curved magnifying component 120 to block the light emitted by the light source 135. This blocking is not a simple shielding, but is designed based on the envelope space of the human eye moving within the eye box area 140, ensuring that when the human eye moves within the designed observation range, the anti-glare component 136 can always block the light emitted by the light source 135, forming an "anti-glare safety zone".

[0175] The anti-glare component 136, which achieves the above-mentioned function, includes, for example, a plurality of fin structures 136a arranged sequentially along the length direction of the first light strip 131 (i.e., the length direction of the strip light panel 134). At least one light source 135 is disposed between two adjacent fin structures 136a, and the fin structures 136a are connected to the strip light panel 134, for example. In some examples, one light source 135 is disposed between two adjacent fin structures 136a. Of course, in practical applications, two or more light sources 135 can also be disposed. Moreover, the fin structure 136a has a first surface 1361 facing away from the curved surface magnification component 120 and a second surface 1362 facing the curved surface magnification component 120. The reflectivity of the first surface 1361 of each fin structure 136a is greater than 50%, preferably greater than 80%; and the reflectivity of the second surface 1362 is less than 5%, preferably less than 2%.

[0176] Because the first surface 1361 has a high reflectivity, it can reflect the light emitted by the light source 135 towards the image source placement area, thereby improving light energy utilization efficiency. Furthermore, in some embodiments, the first surface 1361 is provided with a reflective film to improve its reflectivity. The reflective film can be a high-reflectivity film such as silver-plated or aluminum-plated film, which can reflect the light illuminating the first surface 1361 with a very high reflectivity, further improving light efficiency. Of course, in practical applications, the fin structure 136a can be entirely made of a high-reflectivity metal material such as silver or aluminum, making the first surface 1361 itself a high-reflectivity metal material such as silver or aluminum.

[0177] Based on this, such as Figure 15 As shown, the second surface 1362 of the fin structure 136a faces the curved magnifying component 120. Light and ambient stray light incident on it may be reflected into the human eye, such as... Figure 15As shown by the red arrow. To solve this problem, this application makes the reflectivity of the second surface 1362 less than 5% or 2%. Due to the extremely low reflectivity of the second surface 1362 (less than 5% or less than 2%), it has a strong light absorption capacity. The second surface 1362 efficiently absorbs and converts the light and ambient stray light irradiated by the light source 135 into heat energy, rather than reflecting light, thereby fundamentally eliminating the possibility of glare generated by this path. The anti-glare effect is achieved through the synergy of the physical blocking effect of the fin structure 136a and the absorption effect of the second surface 1362. It should be noted that, unlike ordinary baffles, the reflectivity of the second surface 1362 is less than 5% or less than 2%. This ensures that even if stray light directly irradiates the second surface 1362, the reflected light is so weak as to be negligible, and cannot form a perceptible brightness at the human eye, thus eliminating secondary glare that may be generated by the blocking behavior itself.

[0178] In some embodiments, the second surface 1362 is an anodized surface, or the second surface 1362 is provided with a light-absorbing paint layer (e.g., a black smooth surface), or the second surface 1362 is a flocked surface. In practical applications, the fin structure 136a can be made entirely of a high-reflectivity metal material such as silver or aluminum, and the second surface 1362 of this metal material can be treated accordingly to obtain the aforementioned anodized surface, light-absorbing paint layer, flocked surface, etc.

[0179] The fin structure 136a can adopt two structures. In the first structure, the thickness of the fin structure 136a (the distance between the first surface 1361 and the second surface 1362) is the same everywhere. Specifically, as shown... Figures 16 to 18 As shown, the anti-glare component 136 adopts a one-piece molded structure, which includes a strip-shaped mounting piece 1363 and a fin structure 136a formed by bending a portion of the mounting piece 1363. The mounting piece 1363 is stacked on the light source mounting surface of the strip light panel 134, and due to bending, a hollow portion 1364 is formed on one side of the fin structure 136a. This hollow portion 1364 can avoid the light source 135 on the light source mounting surface of the strip light panel 134. It is easy to understand that... Figure 17 The surface shown by the mounting plate 1363 is the surface that faces and overlaps with the light source mounting surface of the strip light panel 134, while Figure 18 The surface shown by the mounting plate 1363 is the surface opposite to the light source mounting surface of the strip light panel 134. The fin structure 136a formed by bending the mounting plate 1363 is also sheet-shaped, that is, the thickness of the fin structure 136a is the same at all positions.

[0180] like Figure 19 and Figure 20As shown, the thickness of the fin structure 136a in the second structure (the distance between the first surface 1361 and the second surface 1362) decreases in the direction away from the light source mounting surface of the strip light panel 134 (i.e., the light source mounting surface of the light strip). Specifically, the fin structure 136a uses wedge-shaped fins, with a root thickness greater than the top thickness. Figure 20 As shown, the third surface 1365 of the wedge-shaped fin is used to be stacked on the light source mounting surface of the strip light panel 134. The location of the third surface 1365 of the wedge-shaped fin is the root of the wedge-shaped fin. The first surface 1361 and the second surface 1362 of the fin structure 136a of this structure intersect, and the position where the first surface 1361 and the second surface 1362 intersect is the top of the wedge-shaped fin.

[0181] For the first type of fin structure 136a, such as Figure 9 As shown, if the treatment of its second surface 1362 is not ideal (e.g., the black finish is not ideal), it may still be scattered after being irradiated by the light source 135, causing light to enter the eye box and cause interference. To solve this problem, in some embodiments, the material of the fin structure 136a of the second structure includes black plastic. The fin structure 136a is injection molded from black plastic. Based on the fact that the material of the fin structure 136a of the second structure includes black plastic, the second surface 1362 is the black plastic material of the fin structure 136a itself. Moreover, by polishing the mold, the second surface 1362 obtained by injection molding is a smooth optical mirror surface. The light emitted by the light source is incident on this surface and undergoes specular reflection. Since the reflectivity of the second surface 1362 of black plastic is relatively low, the energy of the reflected light is low, and the reflected light direction of the second surface 1362 is downward, such as... Figure 13 As shown by the dashed line, the reflected light will not enter the eye box area. Furthermore, a reflective film can be provided on the first surface 1361 to improve its reflectivity. The reflective film can be a high-reflectivity film such as silver-plated or aluminum-plated film, which can reflect the light incident on the first surface 1361 with a very high reflectivity, further improving the light efficiency.

[0182] For the first type of fin structure 136a, in some examples, such as Figure 17 As shown, the cross-sectional shape of its first surface 1361 along a third direction can be a straight line, that is, the fin structure 136a adopts a plate-like fin. This type of fin is easy to process and manufacture, and has the lowest cost. In other examples, the cross-sectional shape of the first surface 1361 along a third direction includes an arc or a parabola, the cross-section of which is perpendicular to the light source mounting surface of the strip light panel 134 (i.e., the light source mounting surface of the light strip) and parallel to the length direction of the light strip (i.e., the length direction of the strip light panel 134). Figure 21The cross-section shown is parabolic in shape. The shape of the first surface 1361 determines the distribution of reflected light. According to optical principles, a parabolic surface can reflect light emitted from a light source 135 located at its focal point into a parallel beam. By placing the light source 135 near the focal point of the parabolic first surface 1361, the light can be collimated and directed to a distant image source placement area, thereby improving illuminance, uniformity, and light energy utilization. Furthermore, the arc-shaped first surface 1361 is simpler to manufacture; although it cannot produce perfectly parallel light, it can still converge light and improve the uniformity of the light spot.

[0183] Similarly, for the second type of fin structure 136a, such as Figure 20 As shown, the cross-sectional shape of the first surface 1361 of the fin structure 136a along a third direction includes an arc shape or a parabolic shape. This first surface 1361 can achieve the same effect as the first surface 1361 of the first structure, and will not be described again here.

[0184] In some embodiments, such as Figure 1 As shown, the space optical telescope 10 also includes a base 12 and a bracket 11 connected to the base 12, wherein a curved magnifying component 120 is mounted on the bracket 11; the upper end of a beam splitter 110 is rotatably connected to the curved magnifying component 120. The base 12 and the bracket 11 provide the mounting base for the curved magnifying component 120 and the beam splitter 110, and allow the curved magnifying component 120 to be positioned on the side of the beam splitter 110 away from the eye box area 140, thereby lowering the center of gravity of the entire device and improving stability. Furthermore, by rotatably connecting the upper end of the beam splitter 110 to the curved magnifying component 120, the beam splitter 110 can rotate within a certain angle range to adjust the angle between it and the curved magnifying component 120. The upper end of the beam splitter 110 is connected to the curved magnifying component 120, for example, by a hinge (or pivot). Different users' interpupillary distance, visual habits, and sitting postures will result in slight differences in their most comfortable viewing position (i.e., the optimal position of the eye box). The angle between the beam splitter 110 and the curved magnification component 120 directly affects the position of the virtual image and the spatial distribution of the eyepiece. Users can rotate the beam splitter 110 to fine-tune the projection position and imaging angle of the virtual image to obtain a suitable observation position. In addition, when the device needs to cope with different usage scenarios (for example, switching from a flat book to an easel or music stand with a certain tilt angle), the optimal optical path angle can also be obtained by rotating the beam splitter 110.

[0185] Furthermore, in some embodiments, the beam-splitting component 110 further includes a beam-splitting mounting housing 110a, the edge of the reflective structure is embedded in the beam-splitting mounting housing 110a, and the beam-splitting mounting housing 110a is provided with a first mounting groove (not shown in the figure) for accommodating the first lamp strip 131. A light-transmitting protective cover is provided at the opening of the first mounting groove. Figure 22 A structural diagram of the protective cover 115 and the first light strip 131 is shown. The protective cover 115 is located on the side of the first light strip 131 near the curved magnifying component 120. The beam-splitting mounting housing 110a provides a mounting and support base for the reflective structure. By embedding the edge of the reflective structure into the beam-splitting mounting housing 110a, a robust frame protection is provided for the reflective structure, resisting impacts during handling and use, thus achieving reliable encapsulation and protection of the reflective structure. Furthermore, by providing a first mounting groove on the beam-splitting mounting housing 110a to accommodate the first light strip 131, the position of the first light strip 131 relative to the beam-splitting component 110 can be fixed, allowing it to rotate together with the beam-splitting component 110. The light-transmitting protective cover 115 completely isolates the live parts of the first light strip 131 from the user, preventing the risk of electric shock and meeting safety regulations. Moreover, the protective cover 115 also prevents users (especially children) from directly touching the high-temperature light source 135 or the sharp fin structure 136a. The protective cover 115 can also protect the internal light strips, fins and other precision structures from dust, oil contamination and physical damage.

[0186] Additionally, in some embodiments, such as Figure 22 As shown, the light-transmitting protective cover 115 is provided with at least one heat dissipation hole 115a. The light source 135 generates a large amount of heat during operation. A completely sealed protective cover would cause heat accumulation, leading to a rapid increase in internal temperature. Therefore, the heat dissipation hole 115a allows the light source 135 to communicate with the outside air, achieving heat dissipation, thereby improving the lifespan and luminous efficiency of the light source 135, and also helping to prevent the aging of internal components such as fins and circuitry due to prolonged high temperatures. Furthermore, as... Figure 23 As shown, in embodiments where the heat dissipation hole 115a is a through hole (e.g., a rectangular through hole or an oblong hole), the sidewall of the heat dissipation hole 115a is perpendicular to the light source mounting surface of the strip light panel 134. The reflection of light by the sidewall of the heat dissipation hole 115a may produce glare, and the reflected light path is as follows: Figure 23 As shown by the red arrow. To solve this problem, as... Figure 24As shown, the heat dissipation hole 115a has an isosceles trapezoidal shape in its cross-section along the third direction, and the opening size of the heat dissipation hole 115a in its cross-section along the third direction increases from the end closer to the first light strip 131 to the end farther away from the first light strip 131. By making the sidewall of the heat dissipation hole 115a sloped (less than 90°) relative to the light source mounting surface of the strip light panel 134, this slope can prevent the reflected light emitted by the light source 135 from entering the eye and causing glare. The reflected light path is as follows: Figure 24 As shown by the red arrow.

[0187] In some embodiments, such as Figure 1 As shown, the curved magnifying component 120 includes a curved mounting housing 122 and a curved reflector 121. The curved mounting housing 122 is connected to the bracket 11. The curved mounting housing 122 is provided with a third mounting groove for accommodating the third light strip 133, such as... Figure 25 As shown, a reflector 123 is installed in the third mounting slot. The reflector 123 is located on the light-emitting side of the third light strip 133 and is used to reflect the light emitted by the third light strip 133. The reflected light path is as follows: Figure 25 As shown by the red arrow, the reflector 123 reflects the light emitted by the third LED strip 133, providing bottom illumination while eliminating direct glare that the third LED strip 133 may produce. Furthermore, the reflector 123 reflects ineffectively scattered light towards the image source area, thereby improving light energy utilization efficiency and illumination uniformity. In addition, by providing a third mounting groove in the curved mounting housing 122 to accommodate the third LED strip 133, the third LED strip 133 and the curved mounting housing 122 can be integrated. This not only ensures a more accurate relative position between the optical and lighting elements, but also provides protection for the curved reflector 121 and the third LED strip 133.

[0188] In some embodiments, the curved magnifying component 120 (i.e., the curved reflector 121 described above) includes a spherical mirror, an aspherical mirror, or a freeform mirror.

[0189] In some embodiments, the light emission direction of the third light strip 133 is adjustable. By adjusting the light emission direction of the third light strip 133, the angle at which the third light strip 133 illuminates the image source placement area can be adjusted. If the third light strip 133 faces the far end of the image source placement area, the light path becomes longer and the illumination range becomes larger, but the illuminance per unit area will decrease, forming a wider and softer "floodlight" effect. If the third light strip 133 faces the near end of the image source placement area, the light is more concentrated and the illumination range becomes smaller, but the illuminance per unit area will increase, forming a more concentrated and bright "spotlight" effect. Users can switch between "wide and dark" and "narrow and bright" lighting modes according to the size of the image source 130 and the current ambient light intensity to achieve the lighting that best meets their current needs. For example, when the ambient light is bright, the spotlight mode can be used to improve contrast; when the ambient light is dark, the floodlight mode can be used to ensure uniformity. In addition, if a user accidentally sees the direct light (glare) from the third light strip 133 from a certain angle, the glare problem can be solved by finely adjusting the light output direction of the third light strip 133 so that the light source 135 completely avoids the line of sight.

[0190] In some embodiments, the orientation of the reflective surface of the reflector 123 is adjustable. By changing the orientation of the reflective surface of the reflector 123, it can be ensured that the reflected light is directed towards the image source placement area, while preventing light from entering the eye box directly or after reflection, thereby solving the glare problem.

[0191] In some embodiments, a light-shielding plate detachably disposed on the transflective structure is also included. This light-shielding plate is used to shield ambient stray light from above and sides, preventing it from reflecting off the surface of the beam-splitting component and causing interference, thereby improving the contrast, color saturation, and sharpness of the virtual image, especially in bright environments. Simultaneously, the light-shielding plate creates an immersive visual observation space for the user, reducing interference from the surrounding environment. By detachably connecting the light-shielding plate to the transflective structure, flexibility is provided for on-demand use, allowing users to switch between 'transparent mode' and 'immersive mode' according to specific ambient lighting conditions, always obtaining the best viewing experience.

[0192] There are several ways to detachably connect the light-shielding plate and the reflective structure. For example, the light-shielding plate and the reflective structure can be detachably connected via a magnetic structure. Further, in some embodiments, the magnetic structure includes a magnetic attractor and a magnet, with the magnetic attractor disposed on one of the light-shielding plate and the reflective structure, and the magnet disposed on the other. Compared to other detachable connection methods such as snap-fit ​​or plug-in connections, the magnetic structure offers greater ease of operation, enabling blind operation and one-second assembly / disassembly, thus improving the user experience.

[0193] In some embodiments, such as Figure 1As shown, the space optical telescope 10 also includes a front cover 13, which can be attached to or detached from the beam splitter 110; as Figure 26 As shown, the front cover 13 is provided with a storage structure for storing the light shield 14. The storage position of the light shield 14 on the front cover 13 is, for example, formed in a recess on the side of the front cover 13 near the beam splitter 110. This recess can be the space 142 between two protrusions 141 formed on the surface of the front cover 13 near the beam splitter 110. The front cover 13 can be used as a dust cover. In addition, when the light shield 14 is not in use, it can be stored in the aforementioned storage position on the front cover 13 and fixed by the storage structure, so that the light shield 14 and the product body form an integral unit. This solves the problem of small accessories being easily lost and difficult to store, ensuring the long-term availability and integrity of the accessories.

[0194] The storage structure that achieves the above-mentioned fixing function can have various structures. In one example, the storage structure includes a hook 144 for fixing the lower edge of the light-shielding plate 14. In another example, such as... Figure 26 and Figure 27 As shown, the storage structure includes a magnetic component 143 for attracting and fixing the upper edge of the light-shielding plate 14. This magnetic component 143 includes, for example, a magnet 143b disposed on the front cover 13. When the light-shielding plate 14 is made of iron or other materials that can be attracted by a magnet, the magnet 143b attracts the light-shielding plate 14. Alternatively, the light-shielding plate 14 may have at least one magnetically attracted piece 143a of iron or other materials disposed on its upper edge, for being attracted by the magnet 143b in a corresponding manner. In practical applications, both examples can be used. This combination of the hook 144 and the magnetic component 143 provides the most secure fixation for the light-shielding plate 14. Of course, either example can be chosen, as long as it ensures that the light-shielding plate 14 is securely stored on the front cover 13.

[0195] In some embodiments, a light-absorbing structure is provided on the surface of the front cover 13 near the beam splitter 110. The light-absorbing structure is used to absorb stray light reflected from the side of the front cover 13 near the beam splitter 110 to further improve the contrast and clarity of the virtual image; moreover, the light-absorbing structure can also eliminate ghosting that may be formed by reflection from the surface of the front cover 13 near the beam splitter 110, ensuring the purity of the image.

[0196] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this application, and this application is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this application, and these modifications and improvements are also considered to be within the scope of protection of this application.

Claims

1. A space optical telescope, characterized in that, The device includes an optical magnification apparatus, comprising: a beam-splitting component and a curved surface magnification component; the beam-splitting component includes a transmission-reflection structure and an absorption structure; wherein, The reflective structure is used to reflect image light from the image source toward the curved magnifying component to form a first ray; The curved magnifying component is used to reflect the first light to form a second light, and the second light partially passes through the reflective structure and the absorptive structure to reach the eye box area, so that the user's eyes see a magnified virtual image when they are in the eye box.

2. The space optical telescope according to claim 1, characterized in that, The image source uses natural light. The reflective structure is a planar reflective mirror with a coating layer. The overall reflectivity of the coating layer to natural light is R, and the overall transmittance of the coating layer to natural light is T, and the sum of R and T is equal to 1; the absorptivity of the coating layer is greater than or equal to 0%.

3. The space optical telescope according to claim 2, characterized in that, The coating layer has different reflectivities for S-polarized light and P-polarized light.

4. The space optical telescope according to claim 3, characterized in that, The reflectance of the coating layer to S-polarized light is S1, and the reflectance of the coating layer to P-polarized light is P1, and R = (S1 + P1) / 2; wherein, the reflectance of the coating layer to S-polarized light is greater than the reflectance to P-polarized light. S1 is greater than or equal to 60% and less than or equal to 90%; P1 is greater than or equal to 40% and less than or equal to 70%; or, S1 is greater than or equal to 75% and less than or equal to 85%; P1 is greater than or equal to 45% and less than or equal to 55%.

5. The space optical telescope according to claim 3, characterized in that, The reflectance of the coating layer to S-polarized light is S1, and the reflectance of the coating layer to P-polarized light is P1, and R = (S1 + P1) / 2; wherein, the reflectance of the coating layer to S-polarized light is less than the reflectance to P-polarized light. S1 is greater than or equal to 40% and less than or equal to 70%; P1 is greater than or equal to 60% and less than or equal to 90%; or, S1 is greater than or equal to 45% and less than or equal to 55%; P1 is greater than or equal to 75% and less than or equal to 85%.

6. The space optical telescope according to any one of claims 3-5, characterized in that, The total absorption rate of the absorption structure to natural light is A, where A is greater than 0% and less than or equal to 50%; or, A is greater than or equal to 20% and less than or equal to 40%.

7. The space optical telescope according to any one of claims 2-5, characterized in that, The coating layer includes a metal film layer and / or a dielectric film layer.

8. The space optical telescope according to any one of claims 1-5, characterized in that, The image light from the image source is S-polarized light; the reflective structure is a plane reflective mirror with a coating layer, wherein the difference between the reflectivity of the coating layer for S-polarized light and 0.5 is less than the difference between the reflectivity of the coating layer for P-polarized light and 0.5; or, the image light from the image source is P-polarized light; the reflective structure is a plane reflective mirror with a coating layer, wherein the difference between the reflectivity of the coating layer for P-polarized light and 0.5 is greater than the difference between the reflectivity of the coating layer for S-polarized light and 0.

5.

9. The space optical telescope according to claim 8, characterized in that, The coating layer has a reflectivity of 60% or more and 90% or less for S-polarized light; or, the coating layer has a reflectivity of 75% or more and 85% or less for S-polarized light; and / or, the coating layer has a reflectivity of 40% or more and 70% or less for P-polarized light; or, the coating layer has a reflectivity of 45% or more and 55% or less for P-polarized light. or, The coating layer has a reflectivity of 60% or more and 90% or less for P-polarized light; or, the coating layer has a reflectivity of 75% or more and 85% or less for P-polarized light; and / or, the coating layer has a reflectivity of 40% or more and 70% or less for S-polarized light; or, the coating layer has a reflectivity of 45% or more and 55% or less for S-polarized light.

10. The space optical telescope according to any one of claims 1-5, characterized in that, The transflective structure is a planar transflective mirror having a substrate and a coating layer, and the absorption structure includes at least one of the following: The coating layer having an absorption rate; The substrate having an absorption rate; An absorbent film layer is attached to the substrate, wherein the absorbent film layer is located on the side of the substrate away from the coating layer, or the absorbent film layer and the coating layer are located on the same side of the substrate, and the absorbent film layer is located on the side of the coating layer away from the curved magnifying component.

11. The space optical telescope according to any one of claims 1-5, characterized in that, The absorption structure is a light-absorbing element that is set independently of the reflective structure; the light-absorbing element is located on the side of the reflective structure away from the curved magnifying component; or, the reflective structure has a higher reflectivity for the blue light band of the image light than for the green light band; or, the reflective structure is a planar reflective mirror with a substrate and a coating layer, and the surface of the substrate away from the coating layer is further provided with an anti-reflection coating layer.

12. The space optical telescope according to claim 11, characterized in that, An absorption film layer is also provided on the surface of the substrate on the same side as the coating layer, and the absorption film layer is disposed between the substrate and the coating layer.

13. The space optical telescope according to claim 1, characterized in that, The image light from the image source is linearly polarized light; The space optical telescope also includes at least one waveplate for changing the polarization state of light, the waveplate being located between the beam splitter and the curved surface magnification component.

14. The space optical telescope according to claim 13, characterized in that, The waveplate is a quarter waveplate.

15. The space optical telescope according to any one of claims 1-5, characterized in that, It also includes supplemental lighting for illuminating the area where the image source is placed; The supplementary light includes at least one light strip, and the at least one light strip includes at least two first light strips disposed on both sides of the transflective structure in a first direction; And / or, including at least one second light strip disposed on the bottom side of the translucent structure in the second direction; and / or, including at least one third light strip disposed below the curved magnifying component; the first direction is parallel to the left-right direction of the eye box region; the second direction is parallel to the up-down direction of the eye box region.

16. The space optical telescope according to claim 15, characterized in that, At least one of the light strips includes at least two light sources with different color temperatures, and the color temperature and illuminance of the illuminated area are adjusted by controlling the current of each light source.

17. The space optical telescope according to claim 15, characterized in that, The light strip includes a light source that has a continuous spectral distribution within the visible light wavelength range.

18. The space optical telescope according to claim 15, characterized in that, At least one of the first light strips includes at least two light sources and an anti-glare component arranged sequentially along the length of the first light strip. The anti-glare component is configured to block light emitted by the light sources from directly incident on the curved magnifying component.

19. The space optical telescope according to claim 18, characterized in that, The anti-glare component includes multiple fin structures arranged sequentially along the length of the first light strip. At least one light source is disposed between two adjacent fin structures. Each fin structure has a first surface facing away from the curved magnifying component and a second surface facing the curved magnifying component. The reflectivity of the first surface of each fin structure is greater than 50% or greater than 80%; the reflectivity of the second surface is less than 5% or less than 2%.

20. The space optical telescope according to claim 19, characterized in that, The first surface is provided with a reflective film to improve its reflectivity.

21. The space optical telescope according to claim 19, characterized in that, The second surface is an anodized surface, or the second surface is provided with a light-absorbing paint layer, or the second surface is a flocked surface.

22. The space optical telescope according to any one of claims 19-21, characterized in that, The first surface of the fin structure has a straight cross-sectional shape along a third direction, or the cross-sectional shape includes an arc or a parabola. The cross-section along the third direction is perpendicular to the mounting surface of the light strip where the light source is mounted, and parallel to the length direction of the light strip.

23. The space optical telescope according to any one of claims 19-21, characterized in that, The first surface of the fin structure intersects with the second surface; The first surface of the fin structure has a cross-sectional shape along a third direction, including an arc or a parabola, wherein the cross-section along the third direction is perpendicular to the mounting surface of the light source on the light strip and parallel to the length direction of the light strip; and / or, The fin structure is made of black plastic.

24. The space optical telescope according to claim 15, characterized in that, The space optical telescope also includes a base and a bracket connected to the base, wherein the curved magnifying component is mounted on the bracket; the upper end of the beam splitting component is rotatably connected to the curved magnifying component.

25. The space optical telescope according to claim 24, characterized in that, The beam splitting component also includes a beam splitting mounting housing, the edge of the reflective structure is embedded in the beam splitting mounting housing, the beam splitting mounting housing is provided with a first mounting groove for accommodating the first light strip, and a light-transmitting protective cover is provided at the opening of the first mounting groove.

26. The space optical telescope according to claim 25, characterized in that, The light-transmitting protective cover is provided with at least one heat dissipation hole.

27. The space optical telescope according to claim 24, characterized in that, The curved magnifying component includes a curved mounting housing and a curved reflector. The curved mounting housing is connected to the bracket. The curved mounting housing is provided with a third mounting groove for accommodating the third light strip. A reflector is provided in the third mounting groove. The reflector is located on the light-emitting side of the third light strip and is used to reflect the light emitted by the third light strip.

28. The space optical telescope according to claim 27, characterized in that, The light emission direction of the third light strip and / or the orientation of the reflective surface of the reflector are set to be adjustable.

29. The space optical telescope according to any one of claims 1-5, characterized in that, It also includes a light-shielding plate that can be detachably disposed on the transflective structure.

30. The space optical telescope according to claim 29, characterized in that, The light-shielding plate and the transparent / reflective structure are detachably connected via a magnetic structure.

31. The space optical telescope according to claim 30, characterized in that, The magnetic attraction structure includes a magnetic attracting sheet and a magnet. The magnetic attracting sheet is disposed in one of the light-shielding plate and the light-transmitting and reflective structure, and the magnet is disposed in the other of the light-shielding plate and the light-transmitting and reflective structure.

32. The space optical telescope according to claim 29, characterized in that, The space optical telescope also includes a front cover, which can be applied to or removed from the beam splitter. The front cover is provided with a storage structure for storing the light shield.

33. The space optical telescope according to claim 32, characterized in that, The storage structure includes hooks for securing the lower edge of the light-shielding plate; and / or, The storage structure includes a magnetic component for attracting and fixing the upper edge of the light-shielding plate.

34. The space optical telescope according to claim 32, characterized in that, The surface of the front cover near the beam splitter is provided with a light-absorbing structure.

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