Optical waveguide system, binocular optical system and binocular telescope

Abstract

The utility model discloses an optical waveguide system, a binocular optical system and a binocular telescope, and relates to the technical field of optics. In the optical waveguide system, light splitting is performed through a light splitting system to form a first light beam and a second light beam. The first light beam and the second light beam are transmitted in different directions in the holographic optical waveguide and finally are emitted from the corresponding coupling-out areas in the holographic optical waveguide, the light beams emitted from the corresponding coupling-out areas can be received in a binocular mode, and the stereoscopic visual effect is achieved. Secondly, since the beam splitting system is adopted to split the light beam into the first light beam and the second light beam, the optical waveguide system provided by the utility model does not need two display screens, and since the holographic optical waveguide is generally mainly composed of thin glass, the holographic optical waveguide system is small in size and weight, convenient to carry and use, and convenient to carry and use. And the experience feeling of a user using the optical waveguide system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optics, in particular to an optical waveguide system, a binocular optical system and binoculars. Background Art

[0002] A major feature of the binocular vision system is that it can provide stereoscopic visual effects, which makes the images perceived by the human eye have a stronger sense of space and realism, and helps to improve the cognitive and comprehension capabilities of the visual system.

[0003] Traditional binocular telescopes use two optical-mechanical systems, including two display screens and two waveguides, that is, two sets of single-eye optical-mechanical systems to achieve the binocular effect, resulting in a relatively large size and weight, making them inconvenient to carry and use.

[0004] It can be seen that providing a new optical system that has the advantages of stereoscopic visual effects, is small in size, and improves user experience is a technical problem that people in this field urgently need to solve. Utility Model Content

[0005] The purpose of the utility model is to provide an optical waveguide system, a binocular optical system and binoculars, so as to solve the technical problem that the existing binoculars are relatively large in size and inconvenient to carry and use.

[0006] To solve the above technical problems, the present invention provides an optical waveguide system, comprising a light splitting system and a holographic optical waveguide, wherein the holographic optical waveguide comprises an incoupling region located in the middle, and a first outcoupling region and a second outcoupling region located at both ends, respectively, wherein the first outcoupling region and the second outcoupling region are located on the same side of the holographic optical waveguide, and the incoupling region corresponds to the position of the light splitting system;

[0007] The optical splitting system is used to split the received light beam into a first light beam and a second light beam;

[0008] The first light beam is transmitted in the holographic waveguide along a first direction, and after being totally reflected, is transmitted to a first outcoupling region of the holographic waveguide and then emitted;

[0009] The second light beam is transmitted along a second direction in the holographic waveguide, and is transmitted to a second outcoupling region of the holographic waveguide after total reflection, wherein the first direction and the second direction are opposite to each other.

[0010] Exemplarily, the optical splitting system uses a grating group located in the middle of the holographic optical waveguide, and the grating group includes a transmission grating and a reflection grating;

[0011] The transmission grating is used to receive the light beam entering from the coupling-in region, and form a second light beam through transmission, and form a first light beam through reflection, so that the first light beam is transmitted along the first direction in the holographic optical waveguide and finally emitted from the first coupling-out region;

[0012] The reflection grating is used to receive and reflect the second light beam, so that the second light beam is transmitted along the second direction in the holographic optical waveguide and finally emitted from the second outcoupling region.

[0013] Exemplarily, the optical splitting system and the holographic optical waveguide are an integrated design structure.

[0014] Exemplarily, the optical splitting system uses a beam splitter group located outside the holographic optical waveguide, the holographic optical waveguide includes a first holographic optical waveguide and a second holographic optical waveguide, the coupling-in region includes a first coupling-in region located in the first holographic optical waveguide and a second coupling-in region located in the second holographic optical waveguide; the beam splitter group includes a semi-transparent mirror and at least one reflecting prism;

[0015] The semi-transparent and semi-reflective mirror is used to receive a light beam and split the light beam into a first light beam and a second light beam; the first light beam is the light beam transmitted by the semi-transparent and semi-reflective mirror, and the second light beam is the light beam reflected by the semi-transparent and semi-reflective mirror;

[0016] at least one reflecting prism is located in the transmission direction of the second light beam;

[0017] The first holographic optical waveguide is used to receive the first light beam through its first coupling-in region, so that the first light beam is transmitted in the first holographic optical waveguide along a first direction, and is transmitted to the first coupling-out region of the first holographic optical waveguide after total reflection and then emitted;

[0018] The second holographic optical waveguide is used to receive the second light beam after passing through the reflective prism through its second coupling-in region, so that the second light beam is transmitted along the second direction in the second holographic optical waveguide, and is transmitted to the second coupling-out region of the second holographic optical waveguide after total reflection and then emitted.

[0019] Exemplarily, the reflecting prism includes a first reflecting prism, a second reflecting prism and a third reflecting prism;

[0020] The reflective surface of the first reflective prism and the reflective surface of the second reflective prism are arranged in parallel;

[0021] The reflecting surface of the third reflecting prism is arranged in parallel with the semi-transparent and semi-reflective mirror;

[0022] The first light beam after passing through the semi-transparent and semi-reflective mirror passes through the first reflecting prism and the second reflecting prism in sequence; the first light beam emitted from the second reflecting prism is transmitted to the first holographic optical waveguide;

[0023] The second light beam passing through the semi-transparent and semi-reflective mirror passes through the third reflecting prism; and the second light beam emitted from the third reflecting prism is transmitted to the second holographic optical waveguide.

[0024] Exemplarily, the semi-transparent mirror contacts the first reflecting prism and the third reflecting prism, and the first reflecting prism contacts the second reflecting prism.

[0025] Exemplarily, the distance between the first outcoupling region of the first holographic light waveguide and the second outcoupling region of the second holographic light waveguide is determined by the distance between two eyes.

[0026] In order to solve the above technical problems, the present invention also provides a binocular optical system, comprising a light source, a collimating element and the above optical waveguide system; the collimating element is located on the optical path between the light source and the holographic optical waveguide.

[0027] Exemplarily, the light source is a single light source; or, the light source includes a first light source and a second light source, and the sight further includes a light combining element, which is located on the optical path between the light source and the collimating element, and is used to combine the light beam emitted by the first light source and the light beam emitted by the second light source and transmit them to the collimating element.

[0028] Exemplarily, the light combining element is a semi-transparent and semi-reflective mirror, and the first light source and the second light source are respectively located on both sides of the semi-transparent and semi-reflective mirror.

[0029] Exemplarily, the first light source and the second light source are light sources of the same type or light sources of different types; wherein the light source types include at least a point light source type and an image source type.

[0030] Exemplarily, the first outcoupling region and / or the second outcoupling region are also arranged on the white light path, and the white light is diffracted by the first outcoupling region and / or the second outcoupling region, and then emitted to the human eye together with the first light beam and / or the second light beam formed based on the light source.

[0031] In order to solve the above technical problems, the present invention also provides a pair of binoculars, comprising the above optical waveguide system or binocular optical system.

[0032] In the optical waveguide system provided by the present invention, a light splitting system is used to split the light into a first light beam and a second light beam. The first light beam and the second light beam are transmitted in different directions in the holographic optical waveguide and are ultimately emitted from corresponding outcoupling regions of the holographic optical waveguide. The binoculars can receive the light beams emitted from the corresponding outcoupling regions, achieving a stereoscopic visual effect. Furthermore, because the light beam is split into the first light beam and the second light beam by the light splitting system, the optical waveguide system provided by the present invention does not require two display screens. Furthermore, because the holographic optical waveguide is generally composed of thin glass, it is relatively small in size and weight, making it easy to carry and use, thereby improving the user experience when using the optical waveguide system.

[0033] In addition, the present invention also provides a binocular optical system, including the above-mentioned optical waveguide system, which has the same or corresponding technical features as the above-mentioned optical waveguide system and has the same effects as above.

[0034] The present invention also provides a pair of binoculars, comprising the above-mentioned optical waveguide system or binocular optical system, which has the same or corresponding technical features and effects as the above-mentioned optical waveguide system or binocular optical system. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 A schematic diagram of an optical waveguide system provided in an embodiment of the present utility model;

[0037] Figure 2 A schematic structural diagram of a first optical waveguide system provided in an embodiment of the present utility model;

[0038] Figure 3 A schematic structural diagram of a second optical waveguide system provided in an embodiment of the present utility model;

[0039] Figure 4 A schematic diagram of a binocular optical system provided by an embodiment of the present utility model;

[0040] Figure 5 A schematic structural diagram of a first binocular optical system provided by an embodiment of the present utility model;

[0041] Figure 6 This is a structural diagram of a second binocular optical system provided in an embodiment of the present utility model.

[0042] The figures are marked as follows: 10-light source; 20-light combining element; 30-collimating element; 40-spectrometric system; 50-holographic optical waveguide; 1-micro display screen; 2-point light source; 3-first semi-transparent and semi-reflective mirror; 4-collimating lens; 5-holographic optical waveguide with beam splitting function; 5.1-light-transmitting holographic grating; 5.2-light-impermeable holographic grating; 5.3-holographic grating; 6-human eye; 7-second semi-transparent and semi-reflective mirror; 8-reflecting prism; 9-ordinary holographic optical waveguide. DETAILED DESCRIPTION

[0043] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0044] The core of the utility model is to provide an optical waveguide system, a binocular optical system and binoculars, so as to solve the technical problem that the existing binoculars are relatively large in size and inconvenient to carry and use.

[0045] In order to enable those skilled in the art to better understand the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods. Figure 1 A schematic diagram of an optical waveguide system provided in an embodiment of the present utility model is shown in FIG. Figure 1 As shown, it includes a light splitting system 40 and a holographic optical waveguide 50. The holographic optical waveguide 50 includes an incoupling region located in the middle, and a first outcoupling region and a second outcoupling region located at both ends, and the first outcoupling region and the second outcoupling region are located on the same side of the holographic optical waveguide 50. The incoupling region corresponds to the position of the light splitting system 40.

[0046] The optical splitting system 40 is used to split the received light beam into a first light beam and a second light beam;

[0047] The first light beam is transmitted along the first direction in the holographic waveguide 50, and is transmitted to the first outcoupling region of the holographic waveguide 50 after total reflection, and then emerges;

[0048] The second light beam is transmitted along the second direction in the holographic waveguide 50 and is transmitted to the second outcoupling region of the holographic waveguide 50 after total reflection. The first direction and the second direction are opposite to each other.

[0049] There are no limitations on the type of optical splitter system 40 employed, as long as it can split the light beam into a first light beam and a second light beam. The optical splitter system 40 can be located inside or outside the holographic waveguide 50. When the optical splitter system 40 is located inside the holographic waveguide 50, it utilizes a grating assembly located in the middle of the holographic waveguide 50. The grating assembly includes a transmission grating (also called a beam splitting grating) and a reflection grating.

[0050] The transmission grating is used to receive the light beam entering from the coupling-in region, and form the second light beam through transmission, and form the first light beam through reflection, so that the first light beam is transmitted along the first direction in the holographic optical waveguide 50 and finally emitted from the first coupling-out region;

[0051] The reflection grating is used to receive and reflect the second light beam, so that the second light beam propagates along the second direction in the holographic waveguide 50 and is finally emitted from the second outcoupling region. To improve the stability of the optical waveguide system, the optical splitting system 40 and the holographic waveguide 50 are integrated.

[0052] In order to make those skilled in the art better understand the optical waveguide system of the present invention when the optical splitting system 40 is located inside the holographic optical waveguide 50, the following is combined with Figure 2 This optical waveguide structure will be described. Figure 2 A schematic structural diagram of the first optical waveguide system provided in an embodiment of the present utility model is shown in FIG. Figure 2 As shown, the optical waveguide system is a holographic optical waveguide 5 with a beam splitting function. In this case, the light splitting system 40 is a light-transmitting holographic grating 5.1. The holographic optical waveguide 5 with a beam splitting function has the function of splitting light in the coupling-in region. After reaching the coupling-in region, the light first propagates to the light-transmitting holographic grating 5.1. At this time, a portion of the light is redirected by the grating and propagates toward the top of the waveguide plate; the remaining light passes through the light-transmitting holographic grating 5.1 and propagates to the light-impermeable holographic grating 5.2. At this time, all the light is redirected by the holographic grating 5.2 and propagates toward the bottom of the waveguide plate. The two beams of light propagating up and down inside the waveguide plate reach the corresponding coupling-out region after multiple total reflections. They are modulated and deflected by the holographic grating 5.3 set in the coupling-out region and then emitted into the human eye 6.

[0053] It is worth noting that the holographic grating 5.3 used in the present embodiment is manufactured using a process similar to that used for holographic photographs, offering advantages such as light weight and high diffraction efficiency. According to the grating equation mλ = d(sinα ± sinβ), the diffraction angle β represents the direction of light propagation after passing through the grating, where the diffraction wavelength (λ) is a constant. By adjusting the grating order (m), the angle of incidence (α), and the grating constant (d), light can be modulated, directing the light passing through the grating in a desired direction.

[0054] In addition to disposing the optical splitter system 40 inside the holographic waveguide 50 as described above, in practice, the optical splitter system 40 may also be disposed outside the holographic waveguide 50 to reduce costs. Specifically, the optical splitter system 40 employs a beam splitter assembly located outside the holographic waveguide 50. The holographic waveguide 50 includes a first holographic waveguide and a second holographic waveguide; the coupling-in region includes a first coupling-in region located in the first holographic waveguide and a second coupling-in region located in the second holographic waveguide; the beam splitter assembly includes a semi-transparent mirror and at least one reflecting prism 8;

[0055] The semi-transparent and semi-reflective mirror is used to receive the light beam and split the light beam into a first light beam and a second light beam; the first light beam is the light beam transmitted by the semi-transparent and semi-reflective mirror, and the second light beam is the light beam reflected by the semi-transparent and semi-reflective mirror;

[0056] At least one reflecting prism 8 is located in the transmission direction of the second light beam;

[0057] The first holographic optical waveguide is used to receive a first light beam through a first coupling-in region thereof, so that the first light beam is transmitted in the first holographic optical waveguide along a first direction, and is transmitted to a first coupling-out region of the first holographic optical waveguide after total reflection and then emitted;

[0058] The second holographic waveguide is used to receive the second light beam after passing through the reflection prism 8 through its second coupling-in region, so that the second light beam is transmitted along the second direction in the second holographic waveguide and is transmitted to the second coupling-out region of the second holographic waveguide after total reflection and then emitted.

[0059] To prevent the coupling region of the holographic optical waveguide 50 from receiving two beams of light, a certain distance is set between the coupling regions of the two holographic optical waveguides 50. At the same time, to improve the visual experience, the distance between the first coupling region of the first holographic optical waveguide and the second coupling region of the second holographic optical waveguide is determined by the distance between the two eyes. There is no limit on the number of reflective prisms 8 used, but at least one reflective prism 8 is included. To prevent the coupling region of the holographic optical waveguide 50 from receiving two beams of light and to ensure that the two eyes can receive information simultaneously as much as possible, the reflective prism 8 includes a first reflective prism, a second reflective prism, and a third reflective prism.

[0060] The reflecting surface of the first reflecting prism and the reflecting surface of the second reflecting prism are arranged in parallel;

[0061] The reflecting surface of the third reflecting prism is arranged in parallel with the semi-transparent and semi-reflective mirror;

[0062] The first light beam after passing through the semi-transparent and semi-reflective mirror passes through the first reflecting prism and the second reflecting prism in sequence; the first light beam emitted from the second reflecting prism is transmitted to the first holographic optical waveguide;

[0063] The second light beam passes through the semi-transparent and semi-reflective mirror and then passes through the third reflecting prism. The second light beam emitted from the third reflecting prism is transmitted to the second holographic optical waveguide.

[0064] In order to improve the structural stability of the optical waveguide system, in implementation, the semi-transparent and semi-reflective mirror is in contact with the first reflecting prism and the third reflecting prism, and the first reflecting prism is in contact with the second reflecting prism.

[0065] In order to make those skilled in the art better understand the optical waveguide system of the present invention when the optical splitting system 40 is located outside the holographic optical waveguide 50, the following is a description of the optical waveguide system of the present invention when the optical splitting system 40 is located outside the holographic optical waveguide 50. Figure 3 This optical waveguide structure will be described. Figure 3 A schematic structural diagram of a second optical waveguide system provided in an embodiment of the present utility model is shown in FIG. Figure 3 As shown, the optical waveguide system includes a second semi-transparent and semi-reflective mirror 7, a reflecting prism 8, and a conventional holographic optical waveguide 9. In this case, the light splitting system 40 comprises the second semi-transparent and semi-reflective mirror 7 and three reflecting prisms 8. The second semi-transparent and semi-reflective prism 7 splits the light beam, with one beam propagating along the original propagation direction and the other propagating in a direction 90° away from the original direction. The reflecting prism 8 reflects and deflects the split light, changing its propagation direction twice, causing the light to exit the reflecting prism 8 and enter the coupling-in region of the conventional holographic optical waveguide 9. The coupling-in region of the conventional holographic optical waveguide 9 receives the incident light, and the holographic grating 5.3 in the coupling-in region changes the propagation direction of the incident light, causing the light to propagate within the optical waveguide. After reaching the coupling-out region, the light is again redirected by the holographic grating 5.3 in the coupling-out region and enters the human eye 6.

[0066] In the optical waveguide system provided in this embodiment, light is split by the light splitting system 40 to form a first light beam and a second light beam. The first and second light beams propagate in different directions within the holographic waveguide 50 and ultimately exit from corresponding outcoupling regions within the holographic waveguide 50. The light beams emitted from the corresponding outcoupling regions can be received by both eyes, achieving a stereoscopic visual effect. Furthermore, because the light splitting system 40 is used to split the light beam into the first and second light beams, the optical waveguide system provided by this utility model does not require two display screens. Furthermore, because the holographic waveguide 50 is generally composed primarily of thin glass, it is compact and lightweight, making it easy to carry and use.

[0067] The optical waveguide system has been described in detail above. Based on the aforementioned optical waveguide system, this embodiment further provides a binocular optical system comprising a light source 10, a collimating element 30, and the aforementioned optical waveguide system. The collimating element 30 is located in the optical path between the light source 10 and the holographic optical waveguide 50. There are no limitations on the light source 10; for example, it can be a single light source or multiple light sources. Specifically, the light source 10 can be, but is not limited to, a laser light source. It can also be a light-emitting diode (LED) light source, a display light source, a light source with a graticule pattern, or a display light source with a digital image. When the light source is a microdisplay, the microdisplay can carry long-infrared thermal imaging information, medium-wave infrared information, short-wave infrared information, near-infrared night vision imaging information, or other types of electronic imaging information. When multiple light sources 10 are used, there are no limitations on the type of light source. For example, the light source 10 includes a first light source and a second light source; the binocular optical system further includes a light combining element 20, which is located on the optical path between the light source 10 and the collimating element 30 and is used to combine the light beam emitted by the first light source and the light beam emitted by the second light source and transmit the combined light beam to the collimating element 30. Figure 4 As shown, Figure 4 This is a schematic diagram of a binocular optical system provided by an embodiment of the present invention, wherein the binocular optical system includes a light combining element 20, a collimating element 30, a light splitting system 40, and a holographic optical waveguide 50, which are sequentially placed along the transmission direction of the light beam emitted by the light source 10. It is worth noting that the first light source and the second light source are light sources of the same type or different types; wherein the light source type includes at least a point light source type and an image source type. Taking light source 1 as an image source and point light source 2 as an example, in the binocular optical system, the light beam emitted by the point light source 2 and the light beam emitted by the image source are combined by the light combining element 20 and then transmitted to the collimating element 30;

[0068] The collimating element 30 is used to collimate the light beam after passing through the light combining element 20;

[0069] The light splitting system 40 is used to receive the light beam collimated by the collimating element 30 and split the collimated light beam into a first light beam and a second light beam;

[0070] The first light beam is transmitted along the first direction in the holographic waveguide 50, and is transmitted to the first outcoupling region of the holographic waveguide 50 after total reflection, and then emerges;

[0071] The second light beam propagates along the second direction in the holographic waveguide 50 and, after total internal reflection, is transmitted to the second outcoupling region of the holographic waveguide 50 for emission. The first direction and the second direction are different. The image source employed is not limited; to reduce the volume of the optical waveguide system, a micro-display screen 1 is employed. The image source and point light source 2 are combined by a light combining element 20. The light combining element 20 employed is not limited; for example, if the light combining element 20 is a semi-transparent mirror, the first light source and the second light source are located on either side of the semi-transparent mirror.

[0072] The light beams after passing through the light combining element 20 are collimated by the collimating element 30. The collimating element 30 used can be a single lens or a combined lens.

[0073] After passing through the collimating element 30, the light beam enters the optical splitting system 40 and is split into a first light beam and a second light beam that travel in opposite directions. The subsequent optical path is the same as that of the optical waveguide system described above and will not be described in detail here.

[0074] It is worth noting that in order to enable the binocular eyes to observe not only the information carried by the light source but also the image of the external scene through the outcoupling area, in practice, the first outcoupling area and / or the second outcoupling area are also set in the white light path (this can be achieved by setting the outcoupling area as a translucent medium). After the white light is diffracted by the first outcoupling area and / or the second outcoupling area, it is emitted to the human eye together with the first light beam and / or the second light beam formed based on the light source 10. When the light source used is a single light source, a dual-light system consisting of a single light source + white light is formed; when the light source used is multiple light sources, a multi-light system consisting of multiple light sources + white light is formed, which improves the user experience when using the binocular optical system.

[0075] In order to make those skilled in the art better understand the binocular optical system of the present invention, Figure 5 The structure of the binocular optics system is described. Figure 5 A schematic structural diagram of the first binocular optical system provided in an embodiment of the present invention is shown in FIG. Figure 5 As shown, the binocular optical system includes: a micro display screen 1, a point light source 2, a first semi-transparent and semi-reflective mirror 3, a collimating lens 4, and a holographic optical waveguide 5 with a beam-splitting function. The incoupling region of the holographic optical waveguide 5 with a beam-splitting function includes a light-transmitting holographic grating 5.1 (i.e., a transmission grating) and a light-impermeable holographic grating 5.2 (i.e., a reflection grating). To achieve a binocular stereoscopic viewing effect, the holographic optical waveguide 5 with a beam-splitting function has two corresponding outcoupling regions.

[0076] The micro display screen 1 is used to display the required image information;

[0077] Point light source 2 is used to form an infinitely far red dot target;

[0078] The first semi-transparent and semi-reflective mirror 3 is used to reflect the red dot light while transmitting the light emitted by the screen, so that the two beams of light are merged together;

[0079] The collimating lens 4 collimates the fused light so that it emerges as parallel light;

[0080] The holographic optical waveguide 5 with beam splitting function splits light in the coupling-in region. Upon reaching the coupling-in region, light first propagates to the light-transmitting holographic grating 5.1, where a portion of the light is redirected by the grating, traveling upwards toward the waveguide. The remaining light passes through the light-transmitting holographic grating 5.1 and propagates to the light-impermeable holographic grating 5.2, where the entire light is redirected downwards. The two beams, traveling up and down the waveguide, undergo multiple total internal reflections before reaching the corresponding coupling-out region. They are modulated and deflected by the holographic grating 5.3 provided in the coupling-out region, before exiting and entering the human eye 6.

[0081] The human eye 6 receives the image of the image source, the information carried by the point light source 2, and also receives the image of the external scene through the outcoupling area.

[0082] In the first binocular optical system provided by this embodiment, light emitted from a micro-display 1 and a point light source 2 is collimated by a collimating lens 4 and then incident as parallel light on the coupling-in region of a holographic optical waveguide 5 with a beam splitting function. The coupling-in region comprises a light-transmitting holographic grating 5.1 and an opaque holographic grating 5.2. Upon reaching the coupling-in region, the light first propagates to the light-transmitting holographic grating 5.1, where a portion of the light is redirected by the grating and propagates upward toward the waveguide. The remaining light then passes through the grating and propagates to the opaque holographic grating 5.2, where all of the light is redirected downward by the opaque holographic grating 5.2. The two beams of light propagating up and down within the waveguide then undergo multiple total internal reflections before reaching the coupling-out region, where they are modulated and deflected by the holographic grating 5.3 and then emitted, superimposed with direct light from the external scene and entering the human eye 6. It can be seen that by arranging the light splitting system 40 inside the holographic waveguide 50 , the binocular holographic waveguide optical system has a compact structure, a small volume and is easy to carry.

[0083] Figure 6 A schematic diagram of the structure of a second binocular optical system provided in an embodiment of the present invention is shown in FIG. Figure 6 As shown, the binocular optical system includes: a micro display screen 1, a point light source 2, a first semi-transparent and semi-reflective mirror 3, a collimating lens 4, a second semi-transparent and semi-reflective mirror 7, a reflecting prism 8 and a common holographic optical waveguide 9.

[0084] The micro display screen 1 is used to display the required image information;

[0085] Point light source 2 is used to form an infinitely far red dot target;

[0086] The first semi-transparent and semi-reflective mirror 3 is used to reflect the red dot light while transmitting the light emitted by the screen, so that the two beams of light are merged together;

[0087] The collimating lens 4 collimates the fused light so that it emerges as parallel light;

[0088] The second semi-transparent and semi-reflective prism receives the collimated light beam emitted from the collimating lens 4 and splits the light beam, wherein one beam propagates along the original propagation direction and the other beam propagates in a direction 90° from the original direction;

[0089] The reflecting prism 8 reflects and deflects the split light, changing its propagation direction twice, so that the light is emitted from the reflecting prism 8 and enters the coupling area of the ordinary holographic optical waveguide 9;

[0090] The coupling-in region of the ordinary holographic optical waveguide 9 receives the incident light, and the holographic grating 5.3 in the coupling-in region changes the propagation direction of the incident light, causing the light to propagate along the inside of the optical waveguide. After the light reaches the coupling-out region, the propagation direction is changed again by the holographic grating 5.3 in the coupling-out region and enters the human eye 6.

[0091] The human eye 6 receives the image of the image source, the information carried by the point light source 2, and also receives the image of the external scene through the outcoupling area.

[0092] In the first binocular optical system and the second binocular optical system, the light beam passing through the collimating element 30 is split by the light splitting system 40 to form a first light beam and a second light beam. The first light beam and the second light beam are transmitted in different directions in the holographic optical waveguide 50, and are finally emitted from the corresponding outcoupling areas in the holographic optical waveguide 50, respectively. The binoculars can receive the light beams emitted by the corresponding outcoupling areas, thereby achieving a stereoscopic visual effect. Secondly, since the light splitting system 40 is used to split the light beam emitted by the light source 10 into the first light beam and the second light beam, the optical waveguide system provided by the present invention does not require two display screens, and the holographic optical waveguide 50 is used. The holographic optical waveguide 50 is mainly composed of thin glass, so its volume and weight are small, and it is easy to carry and use. Thirdly, the light source 10 used includes an image source and a point light source 2, and is transmitted after being combined by the light combining element 20. When the outcoupling area is located on the white light path, the binoculars can receive the image of the image source, the information carried by the point light source 2, and the image of the external scene passing through the outcoupling area, thereby achieving the effect of binocular multi-light fusion and improving the user experience when using the binocular optical system. The optical waveguide and multi-channel fusion will be applied in the optical waveguide system. In addition to the advantages of the binocular system such as stereoscopic visual effects, it also has the advantages of multi-channel fusion, small size and light weight, which greatly improves the user experience.

[0093] In addition, the first binocular optical system directly adopts the holographic optical waveguide 5 with a beam splitting function, further reducing the volume of the binocular optical system; in the second optical waveguide system, the holographic optical waveguide 5 with a beam splitting function is replaced by a semi-transparent and semi-reflective prism, a reflecting prism 8 and an ordinary holographic optical waveguide 9, which relatively reduces the cost.

[0094] An optical waveguide system and a binocular optical system have been described above. This embodiment also provides a pair of binoculars comprising the aforementioned optical waveguide system or binocular optical system. The embodiments of the optical waveguide system and binocular optical system have been described in detail above, and the embodiment of the binoculars will not be further described here; the effects are the same as above.

[0095] The above describes in detail the optical waveguide system, binocular optical system, and binoculars provided by the present invention. The various embodiments are described in a progressive manner, with each embodiment focusing on the differences from the other embodiments. Similar or identical parts between the various embodiments can be referred to in detail. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications fall within the scope of protection of the present invention.

[0096] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

Claims

1. An optical waveguide system, characterized in that: The invention comprises a light splitting system (40) and a holographic optical waveguide (50), wherein the holographic optical waveguide (50) comprises an incoupling region located in the middle, and a first outcoupling region and a second outcoupling region located at two end positions, respectively, and the first outcoupling region and the second outcoupling region are located on the same side of the holographic optical waveguide (50), and the incoupling region corresponds to the position of the light splitting system (40); The optical splitting system (40) is used to split the received light beam into a first light beam and a second light beam; The first light beam is transmitted in the holographic light waveguide (50) along a first direction, and after being totally reflected, is transmitted to a first outcoupling region of the holographic light waveguide (50) and then emitted; The second light beam is transmitted along a second direction in the holographic light waveguide (50), and is transmitted to a second outcoupling region of the holographic light waveguide (50) after total reflection, and is emitted; wherein the first direction and the second direction are opposite.

2. The optical waveguide system according to claim 1, wherein: The optical splitting system (40) uses a grating group located in the middle of the holographic optical waveguide (50), and the grating group includes a transmission grating and a reflection grating; The transmission grating is used to receive the light beam entering from the coupling-in region, and to form a second light beam through transmission and a first light beam through reflection, so that the first light beam is transmitted along a first direction in the holographic optical waveguide (50) and finally emitted from the first coupling-out region; The reflection grating is used to receive and reflect the second light beam, so that the second light beam is transmitted along the second direction in the holographic optical waveguide (50) and finally emitted from the second outcoupling region.

3. The optical waveguide system according to claim 2, wherein: The optical splitting system (40) and the holographic optical waveguide (50) are an integrated design structure.

4. The optical waveguide system according to claim 1, wherein The optical splitting system (40) uses a spectroscope group located outside the holographic optical waveguide (50), the holographic optical waveguide (50) includes a first holographic optical waveguide and a second holographic optical waveguide, the coupling-in region includes a first coupling-in region located in the first holographic optical waveguide and a second coupling-in region located in the second holographic optical waveguide; the spectroscope group includes a semi-transparent and semi-reflective mirror and at least one reflecting prism (8); The semi-transparent and semi-reflective mirror is used to receive a light beam and split the light beam into a first light beam and a second light beam; the first light beam is the light beam transmitted by the semi-transparent and semi-reflective mirror, and the second light beam is the light beam reflected by the semi-transparent and semi-reflective mirror; At least one reflecting prism (8) is located in the transmission direction of the second light beam; The first holographic optical waveguide is used to receive the first light beam through its first coupling-in region, so that the first light beam is transmitted in the first holographic optical waveguide along a first direction, and is transmitted to the first coupling-out region of the first holographic optical waveguide after total reflection and then emitted; The second holographic optical waveguide is used to receive the second light beam after passing through the reflection prism (8) through its second coupling-in region, so that the second light beam is transmitted along the second direction in the second holographic optical waveguide, and is transmitted to the second coupling-out region of the second holographic optical waveguide after total reflection and then emitted.

5. The optical waveguide system according to claim 4, wherein: The reflecting prism (8) comprises a first reflecting prism, a second reflecting prism and a third reflecting prism; The reflective surface of the first reflective prism and the reflective surface of the second reflective prism are arranged in parallel; The reflecting surface of the third reflecting prism is arranged in parallel with the semi-transparent and semi-reflective mirror; The first light beam after passing through the semi-transparent and semi-reflective mirror passes through the first reflecting prism and the second reflecting prism in sequence; the first light beam emitted from the second reflecting prism is transmitted to the first holographic optical waveguide; The second light beam passing through the semi-transparent and semi-reflective mirror passes through the third reflecting prism; and the second light beam emitted from the third reflecting prism is transmitted to the second holographic optical waveguide.

6. The optical waveguide system according to claim 5, wherein: The semi-transparent mirror contacts the first reflecting prism and the third reflecting prism, and the first reflecting prism contacts the second reflecting prism.

7. The optical waveguide system according to claim 4, wherein: The distance between the first outcoupling region of the first holographic light waveguide and the second outcoupling region of the second holographic light waveguide is determined by the distance between the two eyes.

8. A binocular optical system, characterized in that: The optical waveguide system comprises a light source (10), a collimating element (30) and the optical waveguide system according to any one of claims 1 to 7; the collimating element (30) is located on the optical path between the light source (10) and the holographic optical waveguide (50).

9. The binocular optical system according to claim 8, characterized in that: The light source (10) is a single light source; or, the light source (10) includes a first light source and a second light source, and the binocular optical system further includes a light combining element (20), wherein the light combining element (20) is located on the optical path between the light source (10) and the collimating element (30), and is used for combining the light beam emitted by the first light source and the light beam emitted by the second light source and transmitting the combined light beams to the collimating element (30).

10. The binocular optical system according to claim 9, characterized in that: The light combining element (20) is a semi-transparent and semi-reflective mirror, and the first light source and the second light source are respectively located on both sides of the semi-transparent and semi-reflective mirror.

11. The binocular optical system according to claim 9, wherein: The first light source and the second light source are of the same type or different types; wherein the light source types include at least a point light source type and an image source type.

12. The binocular optical system according to any one of claims 8 to 11, characterized in that: The first outcoupling region and / or the second outcoupling region are also arranged on a white light path, and the white light is diffracted by the first outcoupling region and / or the second outcoupling region and then emitted to the human eye together with the first light beam and / or the second light beam formed based on the light source (10).

13. A pair of binoculars, characterized in that: The optical waveguide system comprises the optical waveguide system according to any one of claims 1 to 7 or the binocular optical system according to any one of claims 8 to 12.

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