Optical system and projection method thereof

Abstract

The invention discloses an optical system and a projection method thereof. The optical system includes: a relay assembly including at least one lens; the lens adjusting devices and the lenses are arranged in a one-to-one correspondence mode, and the lens adjusting devices are detachably provided with the corresponding lenses and used for adjusting the horizontal positions and angles of the corresponding lenses. The projection method comprises the step of adjusting the horizontal position and angle of the corresponding lens by using at least one lens adjusting device so as to change the magnification and eccentricity of a light spot generated by the optical system.

Description

Technical Field

[0001] The present application relates to the field of optical technology, and in particular to an optical system and a projection method thereof. Background Art

[0002] The Projection Graphic Unit (PGU) is a system for projecting images, which usually includes a three-color light (Red Green Blue, RGB) light source, a collimator, a relay lens, a photosensitive chip and a projection lens. The three-color light emitted by the RGB light source is uniformly irradiated on the photosensitive chip through the collimator and the relay lens in turn. The projection light beam generated by the photosensitive chip is projected through the projection lens to project the corresponding projection picture.

[0003] However, once the PGU is assembled, the positions and angles of its components cannot be changed, which results in the optical performance of the PGU being unable to be adjusted according to actual needs. Summary of the invention

[0004] The optical system and projection method thereof provided in the embodiments of the present application can solve or partially solve the above-mentioned deficiencies in the prior art or other deficiencies in the prior art.

[0005] According to the first aspect of the present application, an optical system is provided, comprising:

[0006] a relay assembly comprising at least one lens; and

[0007] The lens adjusting device is arranged in one-to-one correspondence with the lens, and the corresponding lens is detachably mounted on the lens adjusting device, so as to adjust the horizontal position and angle of the corresponding lens.

[0008] According to one embodiment of the present application, the lens adjustment device includes:

[0009] A bracket having a matching portion and a lens slot extending along a first direction, wherein the lens slot penetrates the bracket along a second direction perpendicular to the first direction; and

[0010] The base is provided with a position adjustment part for adjusting the horizontal position of the bracket and an angle adjustment part for adjusting the angle of the bracket; one of the position adjustment part, the angle adjustment part and the matching part can be fixedly matched with the other two through fasteners to adjust the horizontal position and angle of the bracket.

[0011] According to an embodiment of the present application, the position adjustment portion includes two groups of position hole groups formed on the base and symmetrically arranged along the second direction, and each group of the position hole groups includes a plurality of position adjustment holes arranged at intervals along the second direction.

[0012] According to one embodiment of the present application, the angle adjustment portion includes an angle adjustment piece separately provided from the base, the angle adjustment piece is formed with two first mounting holes and a plurality of first angle adjustment holes, the two first mounting holes are respectively fixedly matched with the position adjustment holes of the two groups of position hole groups through the fasteners, the plurality of first angle adjustment holes are located between the two first mounting holes and are distributed in a ring shape, and the two ends of the bracket are respectively formed with the matching portions matching with the first angle adjustment holes.

[0013] According to one embodiment of the present application, the angle adjustment portion includes an adjustment hole group formed on the base and corresponding to the position hole group, the adjustment hole group includes second angle adjustment holes corresponding one-to-one to the position adjustment holes of the corresponding position hole group, the center of the second angle adjustment hole and the center of the corresponding position adjustment hole are located on the same arc, the matching portions are respectively formed at both ends of the bracket, the spacing between the two matching portions is equal to the diameter of the arc, and the matching portion can match with the position adjustment hole and the second angle adjustment hole.

[0014] According to an embodiment of the present application, each group of the position hole groups corresponds to a plurality of groups of the adjustment hole groups, and the plurality of groups of the adjustment hole groups are arranged at intervals along the arc.

[0015] According to one embodiment of the present application, the matching portion is a light hole, a threaded hole or a threaded column formed in the bracket.

[0016] According to one embodiment of the present application, the at least one lens includes a first lens and a second lens sequentially arranged along the optical axis; wherein the optical system further includes a right-angle prism, and the right-angle prism is located on the transmission light path of the second lens.

[0017] According to one embodiment of the present application, the optical system further includes:

[0018] A light source assembly emits multiple groups of monochromatic lights;

[0019] A collimating and beam combining component, which collimates and combines the monochromatic light into a combined light beam;

[0020] a fly-eye lens, which shapes the combined light beam into a plurality of light spots with uniform energy distribution, and the fly-eye lens is located on the incident light path of the first lens;

[0021] A photosensitive chip is located on the transmission light path of the right-angle prism; and

[0022] The projection lens is located on the reflection light path of the right-angle prism.

[0023] According to one embodiment of the present application, the light source assembly includes a plurality of light sources distributed in parallel; wherein the collimating beam combining assembly includes:

[0024] A plurality of first collimating lenses are arranged corresponding to the plurality of light sources, and the first collimating lenses are located on the emission light paths of the corresponding light sources;

[0025] A plurality of second collimating lenses are arranged in one-to-one correspondence with the plurality of first collimating lenses, and the second collimating lenses are located on the transmission light paths of the corresponding first collimating lenses;

[0026] a plurality of beam-combining color filters, arranged one-to-one correspondingly to the plurality of the second collimating lenses, the beam-combining color filters being located on the transmission light paths of the corresponding second collimating lenses; and

[0027] The collimating compensation lens is located on the reflected light path of the beam combining filter.

[0028] According to one embodiment of the present application, the magnification of the relay assembly is greater than the preset magnification, and the position change and angle change of the second lens satisfy:

[0029] L / L2≥7;

[0030] Wherein, L is the distance between the surface of the first lens away from the second lens and the surface of the right-angle prism facing the second lens on the optical axis, and L2 is the distance between the second lens and the right-angle prism in a direction perpendicular to the surface of the right-angle prism facing the second lens after adjustment.

[0031] According to one embodiment of the present application, the magnification of the relay assembly is greater than the preset magnification, and the curvature and / or focal length of the first lens after replacement satisfies at least one of the following:

[0032] R1 / f1≥0.3;

[0033] R2 / f1≥0.65;

[0034] f1 / F ≥ 1.85;

[0035] Among them, R1 is the curvature of the surface of the first lens after replacement away from the second lens, R2 is the curvature of the surface of the first lens after replacement facing the second lens, f1 is the focal length of the first lens after replacement, and F is the focal length of the relay assembly after replacing the first lens.

[0036] According to one embodiment of the present application, the magnification of the relay assembly is greater than the preset magnification, and the curvature of the second lens after the direction is reversed satisfies:

[0037] R3 / R4≤2.5;

[0038] Wherein, R3 is the curvature of the surface of the second lens facing the first lens after the direction is reversed, and R4 is the curvature of the surface of the second lens away from the first lens after the direction is reversed.

[0039] According to one embodiment of the present application, the magnification of the relay assembly is not greater than the preset magnification, and the curvature and / or focal length of the first lens after replacement satisfies at least one of the following:

[0040] R1 / f1<0.3;

[0041] R2 / f1<0.7;

[0042] f1 / F<1.85;

[0043] Among them, R1 is the curvature of the surface of the first lens after replacement away from the second lens, R2 is the curvature of the surface of the first lens after replacement facing the second lens, f1 is the focal length of the first lens after replacement, and F is the focal length of the relay assembly after replacing the first lens.

[0044] According to one embodiment of the present application, the magnification of the relay assembly is not greater than the preset magnification, and the curvature and / or focal length of the replaced second lens satisfies at least one of the following:

[0045] R3 / f2≤0.8;

[0046] R4 / f2≤2;

[0047] Wherein, R3 is the curvature of the surface of the second lens facing the first lens after replacement, R4 is the curvature of the surface of the second lens away from the first lens after replacement, and f2 is the focal length of the second lens after replacement.

[0048] According to one embodiment of the present application, the magnification of the relay assembly is not greater than the preset magnification, and the position change and angle change of the second lens satisfy:

[0049] L / L2<7;

[0050] Wherein, L is the distance between the surface of the first lens away from the second lens and the surface of the right-angle prism facing the second lens on the optical axis, and L2 is the distance between the second lens and the right-angle prism in a direction perpendicular to the surface of the right-angle prism facing the second lens after adjustment.

[0051] According to the projection method of the optical system provided by the second aspect of the present application, the optical system includes a relay assembly and a lens adjustment device, the relay assembly includes at least one lens, the lens adjustment device is arranged in a one-to-one correspondence with the lens, and the lens adjustment device is detachably mounted with the corresponding lens, and is used to adjust the horizontal position and angle of the corresponding lens;

[0052] Wherein, the projection method comprises:

[0053] At least one of the lens adjustment devices is used to adjust the horizontal position and angle of the corresponding lens to change the magnification and eccentricity of the light spot generated by the optical system.

[0054] According to one embodiment of the present application, the at least one lens includes a first lens and a second lens sequentially arranged along the optical axis, and the optical system further includes a right-angle prism located on the transmission light path of the second lens;

[0055] Wherein, using at least one of the lens adjustment devices to adjust the horizontal position and angle of the corresponding lens includes:

[0056] The lens adjusting device on which the second lens is mounted is used to adjust the horizontal position and angle of the second lens.

[0057] According to one embodiment of the present application, the position change and angle change of the second lens satisfy at least one of the following:

[0058] ΔL1 / Δθ≥0.1;

[0059] ΔL2 / Δh≥0.1;

[0060] L1 / L2 ≥ 1;

[0061] Among them, L1 is the interval between the first lens and the second lens on the optical axis after adjustment, ΔL1 is the change of L1 before and after adjustment, L2 is the interval between the second lens and the right-angle prism in a direction perpendicular to the surface of the right-angle prism facing the second lens after adjustment, ΔL2 is the change of L2 before and after adjustment, θ is the angle of the symmetry axis of the second lens deviating from the vertical plane perpendicular to the optical axis after adjustment, Δθ is the change of θ before and after adjustment, h is the distance of the center of the second lens deviating from the optical axis after adjustment, and Δh is the change of h before and after adjustment.

[0062] According to one embodiment of the present application, the projection method further includes:

[0063] The first lens is replaced to adjust the magnification of the relay assembly to a first target magnification, wherein the first target magnification is not greater than a preset magnification.

[0064] According to one embodiment of the present application, the projection method further includes:

[0065] The direction of the second lens is reversed to adjust the magnification of the relay assembly to a first target magnification, wherein the first target magnification is not greater than a preset magnification.

[0066] According to one embodiment of the present application, the projection method further includes:

[0067] The first lens and the second lens are replaced to adjust the magnification of the relay assembly to a second target magnification, wherein the second target magnification is greater than a preset magnification.

[0068] The optical system provided in the embodiment of the present application can not only adjust the horizontal position and / or angle of the lens, but also replace the lens by detachably mounting the lens on the lens adjustment device. It can be seen that the present application does not need to redesign a new optical system, but can change the optical performance of the entire optical system by adjusting the position, angle and / or replacing the lens, thereby eliminating color fringes and dark edges, adjusting the size of the projection screen or adapting to photosensitive chips of different sizes, reducing costs and saving time.

[0069] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Other features, purposes and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments made with reference to the following drawings. The drawings are used to better understand the present solution and do not constitute a limitation of the present application.

[0071] In the attached picture:

[0072] Figure 1 is a schematic top view of one of the lens adjustment devices according to the embodiments of the present application;

[0073] Figure 2 is an axial schematic diagram of one of the lens adjustment devices according to the embodiments of the present application;

[0074] Figure 3 is a schematic top view of another lens adjustment device according to an embodiment of the present application;

[0075] Figure 4 is an axial schematic diagram of another lens adjustment device according to an embodiment of the present application;

[0076] Figure 5is a partial schematic diagram of an optical system according to an embodiment of the present application;

[0077] Figure 6 is a schematic diagram of an optical system according to an embodiment of the present application;

[0078] Figure 7 is a flow chart of a projection method of an optical system according to an embodiment of the present application;

[0079] Figure 8 is another flow chart of the projection method of the optical system according to the embodiment of the present application; and

[0080] Fig. 9 is a schematic diagram of a photosensitive chip irradiated with a light spot according to an embodiment of the present application;

[0081] Reference numerals:

[0082] 100, lens adjustment device; 110, bracket; 111, matching part; 112, lens slot;

[0083] 120, base; 121, position adjustment hole; 122, second angle adjustment hole;

[0084] 130, angle adjustment member; 131, first mounting hole; 132, first angle adjustment hole;

[0085] 140, fastener; 200, relay assembly; 210, first lens; 220, second lens;

[0086] 300, right angle prism; 410, blue light source; 420, green light source;

[0087] 430, red light source; 510, first collimating lens; 520, second collimating lens;

[0088] 531, blue beam-combining filter; 532, green beam-combining filter;

[0089] 533, red beam-combining filter; 540, collimating compensation lens; 600, compound eye lens;

[0090] 700, photosensitive chip; 800, projection lens; 900, lens. DETAILED DESCRIPTION

[0091] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the position or state relationship, are based on the position or state relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0092] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0093] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0094] The following is a description of exemplary embodiments of the present application in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0095] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0096] The three-color light emitted by the RGB light source in the PGU is uniformly irradiated on the photosensitive chip through the collimator and the relay lens in turn, and the projection light beam generated by the photosensitive chip is projected through the projection lens to project the corresponding projection picture. Since the optical path and refractive index of the light of different colors in the three-color light are different, the three-color light may form three superimposed light spots of different sizes on the photosensitive chip after passing through the collimator and the relay lens in turn, which will cause color fringes and dark edges on the edge of the projection picture. In addition, there may be different requirements for the size of the projection picture in different scenarios, and once the PGU is assembled, the position and angle of each component in it cannot be changed, so the size of the projection picture is fixed. Similarly, there may be different requirements for the resolution of the projection picture in different scenarios. Different resolutions need to match photosensitive chips of different sizes. Once the PGU is assembled, the position and angle of each component in it cannot be changed, so it can only adapt to photosensitive chips of the same size. At present, in order to improve color fringes and dark edges, change the size of the projection picture, or adapt to photosensitive chips of different sizes, the PGU needs to be redesigned, but this will cost a lot of money and time.

[0097] In order to solve the above problems, combined Figures 1 to 4 As shown, an embodiment of the present application provides a lens adjustment device 100, which includes a bracket 110 and a base 120, the bracket 110 having a mating portion 111 and a lens slot 112 extending along a first direction, the lens slot 112 penetrates the bracket 110 along a second direction perpendicular to the first direction to expose a light-transmitting area of ​​the lens 900; the base 120 is provided with a position adjustment portion for adjusting the horizontal position of the bracket 110 and an angle adjustment portion for adjusting the angle of the bracket 110; one of the position adjustment portion, the angle adjustment portion and the mating portion 111 can be fixedly matched with the other two by a fastener 140.

[0098] When in use, the lens 900 is inserted into the lens slot 112 of the bracket 110 along the first direction (vertical direction). Since the lens slot 112 penetrates the bracket 110 along the second direction (left-right direction), the light-transmitting area of ​​the lens 900 can be exposed after the lens 900 is inserted into the lens slot 112, thereby ensuring that light can pass through the lens 900. Since the base 120 is provided with a position adjustment portion and an angle adjustment portion, the bracket 110 is provided with a matching portion 111, and one of the position adjustment portion, the angle adjustment portion and the matching portion 111 can be fixedly matched with the other two by the fastener 140, when it is necessary to adjust the position and / or angle of the lens 900, the position and / or angle of the bracket 110 can be adjusted by adjusting the matching relationship and matching position of the three, thereby changing the position and / or angle of the lens 900. In addition, although the curvature and surface shape of different lenses 900 may be different, the edge thickness of all lenses 900 is generally the same. By installing the lens 900 with the help of the lens slot 112, the lens 900 can be replaced at will.

[0099] As can be seen from the above, the embodiment of the present application provides a matching portion 111 and a lens slot 112 on the bracket 110, and provides a position adjustment portion and an angle adjustment portion on the base 120, and enables one of the position adjustment portion, the angle adjustment portion and the matching portion 111 to be fixedly matched with the other two through the fastener 140. Not only can the position and / or angle of the bracket 110 be changed by adjusting the matching relationship and matching position of the position adjustment portion, the angle adjustment portion and the matching portion 111, thereby achieving the adjustment of the position and / or angle of the lens 900, but the lens 900 can also be replaced with the help of the lens slot 112. Therefore, when the lens adjustment device 100 is applied to an optical system such as a PGU, there is no need to redesign a new optical system. The optical performance of the entire optical system can be changed by adjusting the position, angle and / or replacement of the lens 900, thereby eliminating color fringes and dark edges, adjusting the size of the projection screen, or adapting to photosensitive chips 700 of different sizes.

[0100] It should be noted that the specific structural forms of the position adjustment part, the angle adjustment part and the matching part 111 are different, and the methods of adjusting the angle and position are also different. For example:

[0101] Form 1: Figure 1 and Figure 2As shown, the position adjustment part includes two groups of position hole groups formed on the base 120 and symmetrically arranged along the second direction, and each group of position hole groups includes a plurality of position adjustment holes 121 arranged at intervals along the second direction. The angle adjustment part includes an angle adjustment member 130 separately arranged from the base 120, and the angle adjustment member 130 is formed with two first mounting holes 131 and a plurality of first angle adjustment holes 132. The two first mounting holes 131 are respectively fixedly matched with the position adjustment holes 121 of the two groups of position hole groups by fasteners 140, and the plurality of first angle adjustment holes 132 are located between the two first mounting holes 131 and are distributed in an annular shape. The two ends of the bracket 110 are respectively formed with matching parts 111 that match the first angle adjustment holes 132. Among them, the matching part 111 can be a light hole, a threaded hole or a threaded column formed on the bracket 110.

[0102] Take the position adjustment hole 121, the first mounting hole 131, the first angle adjustment hole 132 and the matching portion 111 as threaded holes, and the fastener 140 as a screw as an example. When the horizontal position of the lens 900 needs to be adjusted, the screws in the two first mounting holes 131 of the angle adjustment member 130 are first screwed out respectively, and then the angle adjustment member 130 is moved along the second direction until the first mounting hole 131 of the angle adjustment member 130 is aligned with the specified position adjustment hole 121, and finally the screws are screwed back into the first mounting hole 131 and the corresponding position adjustment hole 121 in sequence to fix the angle adjustment member 130 on the base 120. In this way, the horizontal position of the angle adjustment member 130 can be adjusted, and the bracket 110 is fixed on the angle adjustment member 130, and the lens 900 is inserted in the lens slot 112 of the bracket 110, so that the lens 900 and the bracket 110 move synchronously with the angle adjustment member 130, and the horizontal position of the lens 900 changes accordingly. When the angle of the lens 900 needs to be adjusted, firstly, the screws in the two matching parts 111 of the bracket 110 are respectively screwed out, and then the bracket 110 is horizontally rotated relative to the angle adjustment member 130 until the matching part 111 is aligned with the specified first angle adjustment hole 132, and finally the screws are screwed back into the matching part 111 and the corresponding first angle adjustment hole 132 in sequence. In this way, the angle of the bracket 110 can be adjusted, and the lens 900 is inserted into the lens slot 112 of the bracket 110, so that the lens 900 rotates synchronously with the bracket 110, and the angle of the lens 900 also changes accordingly.

[0103] Those skilled in the art should understand that the position adjustment hole 121, the first mounting hole 131, the first angle adjustment hole 132 and the matching portion 111 can be all threaded holes or all light holes, in which case all fasteners 140 can be bolts and nuts. In addition, the fasteners 140 used to fix the angle adjustment member 130 and the base 120 as described above can be the same as the fasteners 140 used to fix the bracket 110 and the angle adjustment member 130, or of course they can be different. For example, when the position adjustment hole 121 and the first mounting hole 131 are threaded holes, the fasteners 140 used to fix the angle adjustment member 130 and the base 120 are screws, and when the matching portion 111 is a threaded column and the first angle adjustment hole 132 is a light hole, the fasteners 140 used to fix the bracket 110 and the angle adjustment member 130 are nuts. In addition, it should be noted that one of the position adjustment hole 121 and the first mounting hole 131 can also be replaced by a threaded column, and the other is a light hole for inserting a threaded column.

[0104] Form 2: Figure 3 and Figure 4 As shown, the position adjustment portion includes two groups of position hole groups formed on the base 120 and symmetrically arranged along the second direction, and each group of position hole groups includes a plurality of position adjustment holes 121 spaced apart along the second direction. The angle adjustment portion includes an adjustment hole group formed on the base 120 and corresponding to the position hole group, and the adjustment hole group includes a second angle adjustment hole 122 corresponding to the position adjustment hole 121 of the corresponding position hole group. The center of the second angle adjustment hole 122 and the center of the corresponding position adjustment hole 121 are located on the same arc. The two ends of the bracket 110 are respectively formed with a matching portion 111, and the spacing between the two matching portions 111 is equal to the diameter of the arc. The matching portion 111 can match the position adjustment hole 121 and the second angle adjustment hole 122.

[0105] Take the position adjustment hole 121, the second angle adjustment hole 122 and the matching part 111 as threaded holes, and the fastener 140 as a screw as an example. When the horizontal position of the lens 900 needs to be adjusted, firstly, the screws in the two matching parts 111 of the bracket 110 are screwed out respectively to remove the bracket 110 from the base 120; then, the bracket 110 is moved along the second direction until the matching part 111 of the bracket 110 is aligned with the specified position adjustment hole 121, and finally, the screws are screwed back into the matching part 111 and the position adjustment hole 121 in sequence to fix the bracket 110 on the base 120. In this way, the horizontal position of the bracket 110 can be adjusted, and the lens 900 is inserted in the lens slot 112 of the bracket 110, so that the lens 900 moves synchronously with the bracket 110, and the horizontal position of the lens 900 also changes accordingly. When the angle of the lens 900 needs to be adjusted, firstly, the screws in the two matching parts 111 of the bracket 110 are respectively screwed out to remove the bracket 110 from the base 120; then the bracket 110 is horizontally rotated relative to the base 120. Since the center of the second angle adjustment hole 122 and the center of the corresponding position adjustment hole 121 are located on the same arc, and the spacing between the matching parts 111 is equal to the diameter of the arc, the matching parts 111 can be aligned with the second angle adjustment hole 122 during the horizontal rotation of the bracket 110. After the matching parts 111 are aligned with the second angle adjustment hole 122, the screws can be screwed into the matching parts 111 and the second angle adjustment hole 122 in sequence. In this way, the angle of the bracket 110 can be adjusted, and the lens 900 is inserted in the lens slot 112 of the bracket 110, so that the lens 900 rotates synchronously with the bracket 110, and the angle of the lens 900 also changes accordingly.

[0106] Similarly, those skilled in the art should understand that the position adjustment hole 121, the second angle adjustment hole 122 and the matching portion 111 can be not only threaded holes, but also light holes. In this case, all fasteners 140 can be bolts and nuts. In addition, the matching portion 111 can also be a threaded column, the position adjustment hole 121 and the second angle adjustment hole 122 are light holes for inserting the threaded column, and the fastener 140 is a nut that matches the threaded column. Of course, the position bar adjustment hole and the second angle adjustment hole 122 can also be replaced by threaded columns, and the matching portion 111 is a light hole for inserting the threaded column.

[0107] In order to expand the angle adjustment range of the lens 900, each group of position holes on the base 120 can correspond to multiple groups of adjustment holes, and the multiple groups of adjustment holes are arranged at intervals along the arc. In other words, each position adjustment hole 121 and multiple second angle adjustment holes 122 are located on the same arc.

[0108] In some embodiments, the bracket 110 includes a bottom plate and two plug-in plates arranged on the bottom plate, and the two plug-in plates are arranged opposite to each other to form a lens slot 112. In other words, the space between the two plug-in plates is the space of the lens slot 112. In order to improve the stability of the lens 900, the left and right edges of the plug-in plates are bent inward to form flanges, and the flanges are used to abut against the edge of the lens 900. Therefore, after the lens 900 is inserted into the lens slot 112, the edge of the lens 900 is located between the two flanges, and the edges of the two surfaces of the lens 900 are respectively in contact with the corresponding flanges.

[0109] In addition, combined Figure 5 and Figure 6 As shown, an embodiment of the present application further provides an optical system, which includes a relay component 200 and at least one lens adjustment device 100, wherein the relay component 200 includes at least one lens, the lens adjustment device 100 is arranged in a one-to-one correspondence with the lens, the lens adjustment device 100 is detachably mounted with the corresponding lens, and the lens adjustment device 100 is used to adjust the horizontal position and angle of the corresponding lens.

[0110] In some embodiments, the at least one lens includes a first lens 210 and a second lens 220 sequentially arranged along the optical axis, the first lens 210 is detachably mounted on one of the lens adjustment devices 100, and the lens adjustment device 100 can adjust the horizontal position and angle of the first lens 100; the second lens 220 is detachably mounted on another lens adjustment device 100, and the lens adjustment device 100 can adjust the horizontal position and angle of the second lens 220. Further, the optical system may also include a right-angle prism 300, which is located on the transmission light path of the second lens 220.

[0111] In some embodiments, the lens adjustment device 100 may include a bracket 110 and a base 120, the bracket 110 having a mating portion 111 and a lens slot 112 extending along a first direction, the lens slot 112 penetrates the bracket 110 along a second direction perpendicular to the first direction to expose a light-transmitting area of ​​the lens 900; the base 120 is provided with a position adjustment portion for adjusting the horizontal position of the bracket 110 and an angle adjustment portion for adjusting the angle of the bracket 110; one of the position adjustment portion, the angle adjustment portion and the mating portion 111 can be fixedly matched with the other two by a fastener 140.

[0112] When assembling the optical system, the first lens 210 and the second lens 220 can be respectively inserted into the lens slots 112 of the two lens adjustment devices 100. Therefore, not only can the position and / or angle of the bracket 110 be changed by adjusting the matching relationship and matching position of the position adjustment part, the angle adjustment part and the matching part 111, thereby achieving the adjustment of the position and / or angle of the first lens 210 and / or the second lens 220, but also the first lens 210 and / or the second lens 220 can be replaced with the lens slot 112. It can be seen that the present application does not need to redesign a new optical system, but only needs to adjust the position, angle and / or replacement of the lens to change the optical performance of the entire optical system, thereby eliminating color fringes and dark edges, adjusting the size of the projection screen or adapting to photosensitive chips 700 of different sizes.

[0113] In some embodiments, the magnification of the relay assembly 200 is greater than the preset magnification, and the position change and angle change of the second lens 220 satisfy: L / L2≥7; L2 is the interval between the second lens 220 and the right angle prism 300 in the direction perpendicular to the surface of the right angle prism 300 facing the second lens 220 after adjusting the bracket 110, and L is the distance between the surface of the first lens 210 away from the second lens 220 and the surface of the right angle prism 300 facing the second lens 220 on the optical axis. The preset magnification may be, but is not limited to, 15.

[0114] In some embodiments, the magnification of the relay assembly 200 is greater than a preset magnification, and the curvature and / or focal length of the replaced first lens 210 satisfies at least one of the following: R1 / f1≥0.3; R2 / f1≥0.65; f1 / F≥1.85; wherein R1 is the curvature of the surface of the replaced first lens 210 away from the second lens 220, R2 is the curvature of the surface of the replaced first lens 210 toward the second lens 220, f1 is the focal length of the replaced first lens 210, and F is the focal length of the relay assembly 200 after replacing the first lens 210.

[0115] In some embodiments, the magnification of the relay component 200 is greater than a preset magnification, and the curvature of the second lens 220 after the direction is turned can also satisfy: R3 / R4≤2.5; wherein R3 is the curvature of the surface of the second lens 220 toward the first lens 210 after the direction is turned, and R4 is the curvature of the surface of the second lens 220 away from the first lens 210 after the direction is turned.

[0116] In some embodiments, the magnification of the relay assembly 200 is not greater than the preset magnification, and the curvature and / or focal length of the replaced first lens 210 may also satisfy at least one of the following: R1 / f1<0.3; R2 / f1<0.7; f1 / F<1.85; wherein R1 is the curvature of the surface of the replaced first lens 210 away from the second lens 220, R2 is the curvature of the surface of the replaced first lens 210 toward the second lens 220, f1 is the focal length of the replaced first lens 210, and F is the focal length of the relay assembly 200 after replacing the first lens 210.

[0117] In some embodiments, the magnification of the relay assembly 200 is not greater than a preset magnification, and the curvature and / or focal length of the replaced second lens 220 satisfies at least one of the following: R3 / f2≤0.8; R4 / f2≤2; wherein R3 is the curvature of the surface of the replaced second lens 220 toward the first lens 210, R4 is the curvature of the surface of the replaced second lens 220 away from the first lens 210, and f2 is the focal length of the replaced second lens 220.

[0118] In some embodiments, the magnification of the relay assembly 200 is not greater than the preset magnification, and the position change and angle change of the second lens 220 satisfy: L / L2<7; L2 is the distance between the second lens 220 and the right-angle prism 300 in a direction perpendicular to the surface of the right-angle prism 300 facing the second lens 220 after adjusting the bracket 110, and L is the distance between the surface of the first lens 210 away from the second lens 220 and the surface of the right-angle prism 300 facing the second lens 220 on the optical axis.

[0119] In some embodiments, Figure 6 As shown, the optical system can also include a light source component, a collimating and beam-combining component, a fly-eye lens 600, a photosensitive chip 700 and a projection lens 800. The light source component emits multiple groups of monochromatic light. The collimating and beam-combining component collimates and combines the monochromatic light into a combined light beam. The fly-eye lens 600 shapes the combined light beam into multiple light spots with uniform energy distribution. The fly-eye lens 600 is located on the incident light path of the first lens 210, the photosensitive chip 700 is located on the transmitted light path of the right-angle prism 300, and the projection lens 800 is located on the reflected light path of the right-angle prism 300.

[0120] In some embodiments, the light source assembly includes a plurality of light sources distributed in parallel. The plurality of light sources can respectively provide monochromatic light of different brightness and / or color. The light source can be, but is not limited to, an LED.

[0121] In some embodiments, the collimating and beam combining assembly may include a collimating and compensating lens 540, a plurality of first collimating lenses 510 arranged one-to-one corresponding to the light sources, second collimating lenses 520 corresponding one-to-one to the first collimating lenses 510, and beam combining color filters corresponding one-to-one to the second collimating lenses 520. The first collimating lens 510 is located on the emission light path of the corresponding light source, the second collimating lens 520 is located on the transmission light path of the corresponding first collimating lens 510, the beam combining color filter is located on the transmission light path of the corresponding second collimating lens 520, and the collimating and compensating lens 540 is located on the reflection light path of the beam combining color filter.

[0122] The working principle of the optical system in the embodiment of the present application is described below using three-color light as an example:

[0123] The optical system includes a light source assembly, a collimating and beam combining assembly, a fly-eye lens 600, a relay assembly 200, a right-angle prism 300, a photosensitive chip 700, a projection lens 800, and two lens adjustment devices 100. The light source assembly includes a red light source 430, a green light source 420, and a blue light source 410. The collimating and beam combining assembly includes a collimating compensation lens 540, three first collimating lenses 510, three second collimating lenses 520, a blue beam combining filter 531, a green beam combining filter 532, and a red beam combining filter 533. The blue beam combining filter 531 is a filter that reflects blue light and transmits red and green light, the green beam combining filter 532 is a filter that reflects green light and transmits red and blue light, and the red beam combining filter 533 is a filter that reflects blue-green light and transmits red light. The three first collimating lenses 510 are respectively located on the emission light paths of the red light source 430, the green light source 420 and the blue light source 410, the three second collimating lenses 520 are respectively located on the transmission light paths of the three first collimating lenses 510, the blue beam-combining filter 531 is located on the transmission light path of the second collimating lens 520 corresponding to the blue light source 410, the green beam-combining filter 532 is located on the transmission light path of the second collimating lens 520 corresponding to the green light source 420, and the green beam-combining filter 532 is located on the reflection light path of the blue beam-combining filter 531, the red beam-combining filter 533 is located on the transmission light path of the second collimating lens 520 corresponding to the red light source 430, and the red beam-combining filter 533 is located on the reflection light path of the green beam-combining filter 532. The collimating compensation lens 540 is located between the green beam-combining filter 532 and the red beam-combining filter 533, and is located on the reflection light path of the green beam-combining filter 532. The fly-eye lens 600 is located on the transmission light path of the red beam-combining filter 533. A microstructure array is formed on the surface of the fly-eye lens 600. The first lens 210 is inserted into the lens slot 112 of one of the lens adjustment devices 100 and is located on the transmission light path of the fly-eye lens 600. The second lens 220 is inserted into the lens slot 112 of another lens adjustment device 100 and is located on the transmission light path of the first lens 210. The right-angle prism 300 is located on the transmission light path of the second lens 220. The photosensitive chip 700 is located on the transmission light path of the right-angle prism 300. The projection lens 800 is located on the reflection light path of the right-angle prism 300.

[0124] Thus, the blue light emitted by the blue light source 410 passes through the corresponding first collimating lens 510 and the second collimating lens 520 in sequence for collimation and then is emitted to the blue beam-combining filter 531. The collimated blue light is reflected by the blue beam-combining filter 531 and then passes through the green beam-combining filter 532. Similarly, the green light emitted by the green light source 420 passes through the corresponding first collimating lens 510 and the second collimating lens 520 in sequence for collimation and then is emitted to the green beam-combining filter 532. The collimated green light is reflected by the green beam-combining filter 532 and then is emitted to the collimating compensation lens 540. The green light and blue light that pass through the collimating compensation lens 540 are reflected by the red beam-combining filter 533 and then are emitted to the fly-eye lens 600. At the same time, the red light emitted by the red light source 430 passes through the corresponding first collimating lens 510 and the second collimating lens 520 in sequence, and then is collimated and emitted to the red beam-combining filter 533. The collimated red light passes through the red beam-combining filter 533 and is emitted to the fly-eye lens 600. Since the optical path of blue light and green light is longer than that of red light, the light beams emitted by the blue light source 410 and the green light source 420 may diverge again before being irradiated to the red beam-combining filter 533 after being collimated by the corresponding first collimating lens 510 and the second collimating lens 520. Therefore, the presence of the collimating compensation lens 540 can re-collimate the blue light and the green light again. The blue light and the green light reflected by the red beam-combining filter 533 are combined with the red light passing through the red beam-combining filter 533 to form a combined light beam and emitted to the fly-eye lens 600. The microstructure array on the surface of the fly-eye lens 600 can shape the light spot shape, adjust the brightness and uniformity, and the combined light beam is shaped by the fly-eye lens 600 into multiple light spots with uniform energy distribution and directed to the first lens 210. The light spot passes through the first lens 210, the second lens 220 and the right-angle prism 300 in sequence and then irradiates the photosensitive chip 700. The photosensitive chip 700 directs the generated projection light beam to the right-angle prism 300, and after total reflection by the right-angle prism 300, it is directed to the projection lens 800. The projection lens 800 projects the projection light beam to the imaging surface to form a projection picture.

[0125] It should be noted that the red beam-combining filter 533 can be a filter that reflects red light and transmits blue-green light, in addition to being a filter that reflects green light and transmits red and blue light. If the red beam-combining filter 533 is a filter that reflects red light and transmits blue-green light, the collimating compensation lens 540 can be disposed between the green beam-combining filter 532 and the red beam-combining filter 533, or between the red beam-combining filter 533 and the fly-eye lens 600 and located on the reflected light path of the red beam-combining filter 533.

[0126] In addition, an embodiment of the present application also provides a projection method for the above-mentioned optical system, which includes: using a lens adjustment device 100 equipped with a second lens 220 to adjust the horizontal position and angle of the second lens 220 to change the magnification and eccentricity of the light spot generated by the optical system.

[0127] In addition, it should be noted that while adjusting the horizontal position and angle of the second lens 220, the magnification of the relay assembly 200 can also be adjusted by turning the direction of the first lens 210, turning the direction of the second lens 220, replacing the first lens 210 and / or replacing the second lens 220.

[0128] The following is an example of the projection method of the optical system of the embodiment of the present application:

[0129] For example, when the projection image formed by the projection lens 800 on the imaging surface has color fringes and dark edges, the horizontal position and angle of the second lens 220 can be changed by adjusting the horizontal position and angle of the bracket 110 on which the second lens 220 is inserted, and then the magnification and eccentricity of the light spot generated by the optical system can be changed to eliminate the color fringes and dark edges of the projected image.

[0130] In this case, the position change and angle change of the second lens 220 can satisfy at least one of the following: ΔL1 / Δθ≥0.1; ΔL2 / Δh≥0.1; L1 / L2≥1; wherein L1 is the interval between the first lens 210 and the second lens 220 on the optical axis after the bracket 110 is adjusted, ΔL1 is the change of L1 before and after the bracket 110 is adjusted, L2 is the interval between the second lens 220 and the right-angle prism 300 in a direction perpendicular to the surface of the right-angle prism 300 facing the second lens 220 after the bracket 110 is adjusted, ΔL2 is the change of L2 before and after the bracket 110 is adjusted, θ is the angle of the symmetry axis of the second lens 220 deviating from the vertical plane perpendicular to the optical axis after the bracket 110 is adjusted, Δθ is the change of θ before and after the bracket 110 is adjusted, h is the distance of the center of the second lens 220 deviating from the optical axis after the bracket 110 is adjusted, and Δh is the change of h before and after the bracket 110.

[0131] Taking the conditional expression ΔL1 / Δθ≥0.1 as an example, in the process of adjusting the horizontal position and angle of the bracket 110 in which the second lens 220 is inserted, the embodiment of the present application can control the change in the interval between the first lens 210 and the second lens 220 on the optical axis before and after the movable bracket 110 while keeping the total length of the optical system unchanged by utilizing the conditional expression, thereby achieving reasonable adjustment of the magnification of the light spot generated by the optical system, and can also control the size of the rotation angle of the second lens 220 to ensure the degree of eccentricity of the light spot generated by the optical system.

[0132] Taking the conditional expression ΔL2 / Δh≥0.1 as an example, in the process of adjusting the horizontal position and angle of the bracket 110 in which the second lens 220 is inserted, the embodiment of the present application can control the change in the interval between the second lens 220 and the right-angle prism 300 before and after the movable bracket 110 while keeping the total length of the optical system unchanged by utilizing the conditional expression, thereby achieving reasonable adjustment of the magnification of the light spot generated by the optical system, and can also control the change in the interval of the center of the second lens 220 from the optical axis, thereby ensuring the eccentricity of the light spot generated by the optical system.

[0133] Taking the conditional expression L1 / L2≥1 as an example, in the process of adjusting the horizontal position and angle of the bracket 110 in which the second lens 220 is inserted, the embodiment of the present application can control the interval between the first lens 210 and the second lens 220 on the optical axis and the interval between the second lens 220 and the right-angle prism 300 after adjusting the bracket 110 by utilizing the above-mentioned conditional expression while keeping the total length of the optical system unchanged, thereby achieving reasonable adjustment of the magnification of the light spot generated by the optical system.

[0134] For example, Figure 7 As shown, when the size of the projection screen needs to be adjusted, while the horizontal position and angle of the second lens 220 are adjusted by using the lens adjustment device 100 equipped with the second lens 220, the first lens 210 can also be replaced to adjust the magnification of the relay assembly 200 to the first target magnification, which is not greater than the preset magnification. Specifically, Figure 7 As shown, the projection method includes: S100, replacing the first lens 210: pulling out the original first lens 210 from the corresponding lens slot 112, and reinserting the new first lens 210 into the lens slot 112; S200, adjusting the horizontal position and angle of the bracket 110 of the lens adjustment device 100 in which the second lens 220 is inserted. In this way, the magnification of the relay component 200 can be adjusted to the first target magnification to change the size of the projected image. The first target magnification is not greater than the preset magnification. For example, the preset magnification can be 15.

[0135] In some embodiments, the position change and angle change of the second lens 220 satisfy at least one of the following: ΔL1 / Δθ≥0.1; ΔL2 / Δh≥0.1; L1 / L2≥1; L / L2≥7; wherein L1 is the interval between the first lens 210 and the second lens 220 on the optical axis after the bracket 110 is adjusted, ΔL1 is the change of L1 before and after the bracket 110 is adjusted, and L2 is the distance between the second lens 220 and the right-angle prism 300 on the surface perpendicular to the right-angle prism 300 facing the second lens 220 after the bracket 110 is adjusted. , ΔL2 is the change of L2 before and after adjusting the bracket 110, θ is the angle of the symmetry axis of the second lens 220 deviating from the vertical plane perpendicular to the optical axis after adjusting the bracket 110, Δθ is the change of θ before and after adjusting the bracket 110, h is the distance between the center of the second lens 220 deviating from the optical axis after adjusting the bracket 110, Δh is the change of h before and after adjusting the bracket 110; L is the distance on the optical axis between the surface of the first lens 210 away from the second lens 220 and the surface of the right-angle prism 300 facing the second lens 220.

[0136] Taking the conditional expression L / L2≥7 as an example, in the process of adjusting the horizontal position and angle of the bracket 110 in which the second lens 220 is inserted, the distance between the surface of the first lens 210 away from the second lens 220 and the right-angle prism 300 on the optical axis and the interval between the second lens 220 and the right-angle prism 300 can be controlled by utilizing the conditional expression under the condition that the total length of the optical system remains unchanged, thereby realizing reasonable adjustment of the magnification of the light spot generated by the optical system so that it is not greater than the preset magnification.

[0137] In some embodiments, the curvature and / or focal length of the replaced first lens 210 satisfies at least one of the following: R1 / f1≥0.3; R2 / f1≥0.65; f1 / F≥1.85; wherein R1 is the curvature of the surface of the replaced first lens 210 away from the second lens 220, R2 is the curvature of the surface of the replaced first lens 210 toward the second lens 220, f1 is the focal length of the replaced first lens 210, and F is the focal length of the relay assembly 200 after replacing the first lens 210.

[0138] Taking the conditional expression R1 / f1≥0.3 as an example, when the first lens 210 is replaced, the embodiment of the present application can achieve reasonable adjustment of the magnification of the light spot generated by the optical system so that it is not greater than the preset magnification by controlling the curvature of the surface of the replaced first lens 210 away from the second lens 220 and the focal length of the first lens 210 by using the above conditional expression while keeping the total length of the optical system unchanged.

[0139] Taking the conditional expression R2 / f1≥0.65 as an example, when the first lens 210 is replaced in the embodiment of the present application, by using the above-mentioned conditional expression to control the curvature of the surface of the replaced first lens 210 facing the second lens 220 and the focal length of the first lens 210, the magnification of the light spot generated by the optical system can be reasonably adjusted to be no greater than the preset magnification when the total length of the optical system remains unchanged.

[0140] Taking the conditional expression f1 / F≥1.85 as an example, when the first lens 210 is replaced in the embodiment of the present application, by using the above-mentioned conditional expression to control the focal length of the replaced first lens 210 and the focal length of the relay assembly 200 after replacing the first lens 210 while keeping the total length of the optical system unchanged, it is possible to achieve a reasonable distribution of the optical focal length, and then achieve a reasonable adjustment of the magnification of the light spot generated by the optical system so that it is not greater than the preset magnification.

[0141] It should be noted that, in addition to the above-mentioned method, when the size of the projection screen needs to be adjusted, the horizontal position and angle of the second lens 220 can be adjusted by using the lens adjustment device 100 equipped with the second lens 220, and the direction of the second lens 220 can be turned around to adjust the magnification of the relay assembly 200 to the first target magnification. Specifically, Figure 7 As shown, the projection method includes: S100, turning the direction of the second lens 220: pulling the second lens 220 out of the corresponding lens slot 112, rotating it horizontally 180 degrees, and reinserting it into the lens slot 112; S200, adjusting the horizontal position and angle of the bracket 110 of the lens adjustment device 100 in which the second lens 220 is inserted. In this way, the magnification of the relay assembly 200 can also be adjusted to the first target magnification, thereby changing the size of the projection screen.

[0142] In this case, the position change and angle change of the second lens 220 satisfy at least one of the following: ΔL1 / Δθ≥0.1; ΔL2 / Δh≥0.1; L1 / L2≥1. In addition, the curvature of the second lens 220 after the turn can also satisfy: R3 / R4≤2.5; wherein R3 is the curvature of the surface of the second lens 220 facing the first lens 210 after the turn, and R4 is the curvature of the surface of the second lens 220 away from the first lens 210 after the turn. If the curvature of the second lens 220 satisfies the above conditional formula, the magnification of the relay assembly 200 can be adjusted by turning the second lens 220 and adjusting the horizontal position and angle of the second lens 220, thereby changing the size of the projection screen.

[0143] For example, Figure 8As shown, when it is necessary to match different types of chips, the first lens 210 and the second lens 220 can be replaced while adjusting the horizontal position and angle of the second lens 220 using the lens adjustment device 100 equipped with the second lens 220 to adjust the magnification of the relay assembly 200 to the second target magnification. Specifically, as Figure 8 As shown, the projection method includes: S100, replacing the first lens 210 and the second lens 220: pulling out the original first lens 210 and the second lens 220 from the corresponding lens slot 112 respectively, and reinserting the new first lens 210 and the second lens 220 into the corresponding lens slot 112; S200, adjusting the horizontal position and angle of the bracket 110 of the lens adjustment device 100 in which the second lens 220 is inserted. In this way, the magnification of the relay component 200 can be adjusted to the second target magnification, thereby changing the resolution of the projected image to adapt to different types of photosensitive chips 700. Among them, the second target magnification is greater than the preset magnification.

[0144] In this case, the position change and angle change of the second lens 220 satisfy at least one of the following: ΔL1 / Δθ≥0.1; ΔL2 / Δh≥0.1; L1 / L2≥1; L / L2<7. In addition, the curvature and / or focal length of the replaced first lens 210 may also satisfy at least one of the following: R1 / f1<0.3; R2 / f1<0.7; f1 / F<1.85; wherein R1 is the curvature of the surface of the replaced first lens 210 away from the second lens 220, R2 is the curvature of the surface of the replaced first lens 210 facing the second lens 220, f1 is the focal length of the replaced first lens 210, and F is the focal length of the relay assembly 200 after the first lens 210 is replaced. The curvature and / or focal length of the replaced second lens 220 satisfies at least one of the following: R3 / f2≤0.8; R4 / f2≤2; wherein R3 is the curvature of the surface of the replaced second lens 220 facing the first lens 210, R4 is the curvature of the surface of the replaced second lens 220 away from the first lens 210, and f2 is the focal length of the replaced second lens 220.

[0145] Taking the conditional expression R1 / f1<0.3 as an example, when the first lens 210 is replaced in the embodiment of the present application, by using the above-mentioned conditional expression to control the curvature of the surface of the replaced first lens 210 away from the second lens 220 and the focal length of the first lens 210, the magnification of the light spot generated by the optical system can be reasonably adjusted to be greater than the preset magnification when the total length of the optical system remains unchanged.

[0146] Taking the conditional expression R2 / f1<0.7 as an example, when the first lens 210 is replaced in the embodiment of the present application, by using the above-mentioned conditional expression to control the curvature of the surface of the replaced first lens 210 away from the second lens 220 and the focal length of the first lens 210, the magnification of the light spot generated by the optical system can be reasonably adjusted to be greater than the preset magnification when the total length of the optical system remains unchanged.

[0147] Taking the conditional expression f1 / F<1.85 as an example, when the first lens 210 is replaced in the embodiment of the present application, by using the above-mentioned conditional expression to control the focal length of the replaced first lens 210 and the focal length of the relay assembly 200 after replacing the first lens 210 while keeping the total length of the optical system unchanged, it is possible to achieve a reasonable distribution of optical focal length, and then achieve a reasonable adjustment of the magnification of the light spot generated by the optical system to make it greater than the preset magnification.

[0148] Taking the conditional expression R3 / f2≤0.8 as an example, when the second lens 220 is replaced in the embodiment of the present application, by using the above-mentioned conditional expression to control the curvature of the surface of the replaced second lens 220 facing the first lens 210 and the focal length of the second lens 220, the magnification of the light spot generated by the optical system can be reasonably adjusted to be greater than the preset magnification when the total length of the optical system remains unchanged.

[0149] Taking the conditional expression R4 / f2≤2 as an example, when the second lens 220 is replaced in the embodiment of the present application, by using the above-mentioned conditional expression to control the curvature of the surface of the replaced second lens 220 away from the first lens 210 and the focal length of the second lens 220, the magnification of the light spot generated by the optical system can be reasonably adjusted to be greater than the preset magnification when the total length of the optical system remains unchanged.

[0150] The following is an example of optical systems with different structural forms in the implementation manner of the present application:

[0151] Example 1

[0152] Combination Figure 6As shown, in the embodiment of the present application, the optical system includes a light source assembly, a collimating and beam combining assembly, a fly-eye lens 600, a relay assembly 200, a right-angle prism 300, a photosensitive chip 700, a projection lens 800, and two lens adjustment devices 100. Among them, the light source assembly includes a red light source 430, a green light source 420, and a blue light source 410. The collimating and beam combining assembly includes a collimating compensation lens 540, three first collimating lenses 510, three second collimating lenses 520, a blue beam combining filter 531, a green beam combining filter 532, and a red beam combining filter 533. The blue beam combining filter 531 is a filter that reflects blue light and transmits red and green light, the green beam combining filter 532 is a filter that reflects green light and transmits red and blue light, and the red beam combining filter 533 is a filter that reflects blue-green light and transmits red light.

[0153] The blue light emitted by the blue light source 410 passes through the corresponding first collimating lens 510 and the second collimating lens 520 in sequence, and then is collimated and emitted to the blue beam-combining filter 531. The collimated blue light is reflected by the blue beam-combining filter 531 and then passes through the green beam-combining filter 532. Similarly, the green light emitted by the green light source 420 passes through the corresponding first collimating lens 510 and the second collimating lens 520 in sequence, and then is collimated and emitted to the green beam-combining filter 532. The collimated green light is reflected by the green beam-combining filter 532 and then is emitted to the collimating compensation lens 540. The green light and blue light that pass through the collimating compensation lens 540 are reflected by the red beam-combining filter 533 and then are emitted to the fly-eye lens 600. At the same time, the red light emitted by the red light source 430 passes through the corresponding first collimating lens 510 and the second collimating lens 520 in sequence, and then is collimated and emitted to the red beam-combining filter 533. The collimated red light passes through the red beam-combining filter 533 and then is emitted to the fly-eye lens 600. Since the optical path of blue light and green light is longer than that of red light, the light beams emitted by the blue light source 410 and the green light source 420 may diverge again before being irradiated to the red beam-combining filter 533 after being collimated by the corresponding first collimating lens 510 and the second collimating lens 520. Therefore, the presence of the collimating compensation lens 540 can re-collimate the blue light and the green light again. The blue light and the green light reflected by the red beam-combining filter 533 are combined with the red light passing through the red beam-combining filter 533 into a combined light beam and emitted to the fly-eye lens 600. The microstructure array on the surface of the fly-eye lens 600 can shape the spot shape, adjust the brightness and uniformity, and the combined light beam is shaped by the fly-eye lens 600 into multiple spots with uniform energy distribution and emitted to the first lens 210. The light spot passes through the first lens 210, the second lens 220 and the right-angle prism 300 in sequence and then irradiates the photosensitive chip 700. The photosensitive chip 700 re-projects the generated projection image to the right-angle prism 300, which is then projected to the projection lens 800 after total reflection by the right-angle prism 300. The projection lens 800 projects the projection light beam onto the imaging surface to form a projection picture.

[0154] If the light spot does not completely cover the photosensitive area of ​​the photosensitive chip 700 after passing through the first lens 210, the second lens 220 and the right-angle prism 300 in sequence, in other words, the photosensitive area is not completely illuminated, then the projection image formed by the projection lens 800 on the imaging surface will have color fringing and dark edges. In order to eliminate color fringing and dark edges, the lens adjustment device 100 can be used to adjust the horizontal position and angle of the second lens 220 while ensuring that the total length of the optical system remains unchanged. The position change and angle change of the second lens 220 meet at least one of the following requirements: ΔL1 / Δθ≥0.1; ΔL2 / Δh≥0.1; L1 / L2≥1; wherein L1 is the interval between the first lens 210 and the second lens 220 on the optical axis after adjusting the bracket 110, ΔL1 is the change in L1 before and after adjusting the bracket 110, and L2 is After adjusting the bracket 110, the interval between the second lens 220 and the right-angle prism 300 in the direction perpendicular to the surface of the right-angle prism 300 facing the second lens 220, ΔL2 is the change of L2 before and after adjusting the bracket 110, θ is the angle of the symmetry axis of the second lens 220 deviating from the vertical plane perpendicular to the optical axis after adjusting the bracket 110, Δθ is the change of θ before and after adjusting the bracket 110, h is the distance of the center of the second lens 220 deviating from the optical axis after adjusting the bracket 110, and Δh is the change of h before and after adjusting the bracket 110.

[0155] Example 2

[0156] The optical system in this embodiment is substantially the same as the optical system in Embodiment 1, and this embodiment will not repeat the same parts as those in Embodiment 1. When the size of the projection screen needs to be adjusted, the first lens 210 can be replaced while ensuring that the total length of the optical system remains unchanged, and the lens adjustment device 100 can be used to adjust the horizontal position and angle of the second lens 220.

[0157] The curvature and / or focal length of the replaced first lens 210 satisfy at least one of the following: R1 / f1≥0.3; R2 / f1≥0.65; f1 / F≥1.85; wherein R1 is the curvature of the surface of the replaced first lens 210 away from the second lens 220, R2 is the curvature of the surface of the replaced first lens 210 facing the second lens 220, f1 is the focal length of the replaced first lens 210, and F is the focal length of the relay assembly 200 after the first lens 210 is replaced. Furthermore, R1 / f1≥0.32, R2 / f1≥0.7.

[0158] In addition, during the adjustment of the lens adjustment device 100, the position change and angle change of the second lens 220 satisfy at least one of the following: ΔL1 / Δθ≥0.1; ΔL2 / Δh≥0.1; L1 / L2≥1; L / L2≥7; wherein L1 is the interval between the first lens 210 and the second lens 220 on the optical axis after the bracket 110 is adjusted, ΔL1 is the change amount of L1 before and after the bracket 110 is adjusted, and L2 is the distance between the second lens 220 and the right-angle prism 300 perpendicular to the right-angle prism 300 toward the second lens after the bracket 110 is adjusted. 220, ΔL2 is the change of L2 before and after adjusting the bracket 110, θ is the angle at which the axis of symmetry of the second lens 220 deviates from the vertical plane perpendicular to the optical axis after adjusting the bracket 110, Δθ is the change of θ before and after adjusting the bracket 110, h is the distance at which the center of the second lens 220 deviates from the optical axis after adjusting the bracket 110, Δh is the change of h before and after adjusting the bracket 110, and L is the distance on the optical axis between the surface of the first lens 210 away from the second lens 220 and the surface of the right-angle prism 300 facing the second lens 220.

[0159] Therefore, if Fig. 9 In the embodiment of the present application, by replacing the first lens 210 and adjusting the horizontal position and angle of the second lens 220, the magnification of the relay component 200 can be adjusted to 15 or below, so that the length dimension H of the light spot on the photosensitive chip 700 is not greater than 6.5718 mm and the width dimension D is not greater than 4.1 mm.

[0160] Example 3

[0161] The optical system in this embodiment is substantially the same as the optical system in Embodiment 1, and the same parts as those in Embodiment 1 are not described in detail in this embodiment. When the size of the projection screen needs to be adjusted, the direction of the second lens 220 can be turned while ensuring that the total length of the optical system remains unchanged, and the horizontal position and angle of the second lens 220 can be adjusted using the lens adjustment device 100.

[0162] The curvature of the second lens 220 after the rotation satisfies: R3 / R4≤2.5; wherein R3 is the curvature of the surface of the second lens 220 facing the first lens 210 after the rotation, and R4 is the curvature of the surface of the second lens 220 away from the first lens 210 after the rotation.

[0163] In addition, during the adjustment of the lens adjustment device 100, the position change and angle change of the second lens 220 satisfy at least one of the following: ΔL1 / Δθ≥0.1; ΔL2 / Δh≥0.1; L1 / L2≥1; wherein L1 is the interval between the first lens 210 and the second lens 220 on the optical axis after the bracket 110 is adjusted, ΔL1 is the change in L1 before and after the bracket 110 is adjusted, L2 is the interval between the second lens 220 and the right-angle prism 300 in a direction perpendicular to the surface of the right-angle prism 300 facing the second lens 220 after the bracket 110 is adjusted, ΔL2 is the change in L2 before and after the bracket 110 is adjusted, θ is the angle of the symmetry axis of the second lens 220 deviating from the vertical plane perpendicular to the optical axis after the bracket 110 is adjusted, Δθ is the change in θ before and after the bracket 110 is adjusted, h is the distance of the center of the second lens 220 deviating from the optical axis after the bracket 110 is adjusted, and Δh is the change in h before and after the bracket 110.

[0164] Therefore, if Fig. 9 As shown, in the embodiment of the present application, by replacing the first lens 210 and adjusting the horizontal position and angle of the second lens 220, the magnification of the relay component 200 can be adjusted to 15 or below, so that the length dimension H of the light spot on the photosensitive chip 700 is not greater than 6.5718 mm and the width dimension D is not greater than 4.1 mm.

[0165] Example 4

[0166] The optical system in this embodiment is substantially the same as the optical system in Embodiment 1, and this embodiment will not repeat the same parts as those in Embodiment 1. When it is necessary to match different types of chips, the first lens 210 and the second lens 220 can be replaced while ensuring that the total length of the optical system remains unchanged, and the lens adjustment device 100 can be used to adjust the horizontal position and angle of the second lens 220.

[0167] Among them, the curvature and / or focal length of the replaced first lens 210 and the second lens 220 respectively satisfy at least one of the following: R1 / f1<0.3; R2 / f1<0.7; f1 / F<1.85; R3 / f2≤0.8; R4 / f2≤2; wherein R1 is the curvature of the surface of the replaced first lens 210 away from the second lens 220, R2 is the curvature of the surface of the replaced first lens 210 toward the second lens 220, f1 is the focal length of the replaced first lens 210, F is the focal length of the relay assembly 200 after the first lens 210 is replaced, R3 is the curvature of the surface of the replaced second lens 220 toward the first lens 210, R4 is the curvature of the surface of the replaced second lens 220 away from the first lens 210, and f2 is the focal length of the replaced second lens 220.

[0168] In addition, during the adjustment of the lens adjustment device 100, the position change and angle change of the second lens 220 satisfy at least one of the following: ΔL1 / Δθ≥0.1; ΔL2 / Δh≥0.1; L1 / L2≥1; L / L2<7; wherein L1 is the interval between the first lens 210 and the second lens 220 on the optical axis after the bracket 110 is adjusted, ΔL1 is the change amount of L1 before and after the bracket 110 is adjusted, and L2 is the distance between the second lens 220 and the right-angle prism 300 perpendicular to the right-angle prism 300 toward the second lens after the bracket 110 is adjusted. 220, ΔL2 is the change of L2 before and after adjusting the bracket 110, θ is the angle at which the axis of symmetry of the second lens 220 deviates from the vertical plane perpendicular to the optical axis after adjusting the bracket 110, Δθ is the change of θ before and after adjusting the bracket 110, h is the distance at which the center of the second lens 220 deviates from the optical axis after adjusting the bracket 110, Δh is the change of h before and after adjusting the bracket 110, and L is the distance on the optical axis between the surface of the first lens 210 away from the second lens 220 and the surface of the right-angle prism 300 facing the second lens 220.

[0169] Therefore, if Fig. 9 As shown, in the embodiment of the present application, by replacing the first lens 210 and adjusting the horizontal position and angle of the second lens 220, the magnification of the relay component 200 can be adjusted to above 15, so that the length dimension H of the light spot on the photosensitive chip 700 is not less than 6.5718 mm and the width dimension D is not less than 3.699 mm.

[0170] The above specific implementations do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. An optical system, characterized in that: include: a relay assembly including at least one lens; as well as The lens adjusting device is arranged in one-to-one correspondence with the lens, and the corresponding lens is detachably mounted on the lens adjusting device, so as to adjust the horizontal position and angle of the corresponding lens.

2. The optical system according to claim 1, wherein: The lens adjustment device comprises: A bracket having a matching portion and a lens slot extending along a first direction, wherein the lens slot penetrates the bracket along a second direction perpendicular to the first direction; and The base is provided with a position adjustment part for adjusting the horizontal position of the bracket and an angle adjustment part for adjusting the angle of the bracket; one of the position adjustment part, the angle adjustment part and the matching part can be fixedly matched with the other two through fasteners to adjust the horizontal position and angle of the bracket.

3. The optical system according to claim 2, wherein: The position adjustment portion includes two groups of position hole groups formed on the base and symmetrically arranged along the second direction, and each group of the position hole groups includes a plurality of position adjustment holes spaced apart along the second direction.

4. The optical system according to claim 3, wherein: The angle adjustment portion includes an angle adjustment piece separately provided from the base, the angle adjustment piece is formed with two first mounting holes and a plurality of first angle adjustment holes, the two first mounting holes are respectively fixedly matched with the position adjustment holes of the two groups of position hole groups through the fasteners, the plurality of first angle adjustment holes are located between the two first mounting holes and are distributed in a ring shape, and the two ends of the bracket are respectively formed with the matching parts matching with the first angle adjustment holes.

5. The optical system according to claim 3, wherein: The angle adjustment portion includes an adjustment hole group formed on the base and corresponding to the position hole group, the adjustment hole group includes second angle adjustment holes corresponding one-to-one to the position adjustment holes of the corresponding position hole group, the center of the second angle adjustment hole and the center of the corresponding position adjustment hole are located on the same arc, the matching portions are respectively formed at both ends of the bracket, the spacing between the two matching portions is equal to the diameter of the arc, and the matching portion can match with the position adjustment hole and the second angle adjustment hole.

6. The optical system according to claim 5, wherein: Each group of the position hole groups corresponds to a plurality of the adjustment hole groups, and the plurality of adjustment hole groups are arranged at intervals along the arc.

7. The optical system according to claim 2, wherein: The matching portion is a light hole, a threaded hole or a threaded column formed on the bracket.

8. The optical system according to any one of claims 1 to 7, wherein: The at least one lens includes a first lens and a second lens sequentially arranged along the optical axis; Wherein, the optical system further comprises a right-angle prism, and the right-angle prism is located on the transmission light path of the second lens.

9. The optical system according to claim 8, wherein: The optical system further comprises: A light source assembly emits multiple groups of monochromatic lights; A collimating and beam combining component, which collimates and combines the monochromatic light into a combined light beam; a fly-eye lens, which shapes the combined light beam into a plurality of light spots with uniform energy distribution, and the fly-eye lens is located on the incident light path of the first lens; A photosensitive chip is located on the transmission light path of the right-angle prism; and The projection lens is located on the reflection light path of the right-angle prism.

10. The optical system according to claim 9, wherein: The light source assembly includes a plurality of light sources distributed in parallel; wherein the collimating beam combining assembly includes: A plurality of first collimating lenses are arranged corresponding to the plurality of light sources, and the first collimating lenses are located on the emission light paths of the corresponding light sources; A plurality of second collimating lenses are arranged in one-to-one correspondence with the plurality of first collimating lenses, and the second collimating lenses are located on the transmission light paths of the corresponding first collimating lenses; a plurality of beam-combining color filters, arranged one-to-one correspondingly to the plurality of the second collimating lenses, the beam-combining color filters being located on the transmission light paths of the corresponding second collimating lenses; and The collimating compensation lens is located on the reflected light path of the beam combining filter.

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