Optical waveguide system, binocular optical system and binocular telescope

Abstract

The invention 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 light beam is divided into the first light beam and the second light beam by the light splitting system, two display screens are not needed in the optical waveguide system provided by the invention, 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 present invention relates to the field of optical technology, and 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 a stereoscopic visual effect, 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 a 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 three-dimensional visual effects, has the characteristics of small size, and improves user experience is a technical problem that needs to be solved urgently by people in this field. Summary of the invention

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

[0006] In order 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 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, and the incoupling region corresponds to the position of the light splitting system;

[0007] The light 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 light waveguide along a first direction, and after being totally reflected, is transmitted to a first outcoupling region of the holographic light waveguide and then emerges;

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

[0010] Exemplarily, the light 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 the second light beam by transmission, and form the first light beam by 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 light splitting system and the holographic optical waveguide are an integrated design structure.

[0014] Exemplarily, the light 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 and semi-reflective 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 a light beam transmitted by the semi-transparent and semi-reflective mirror, and the second light beam is a 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 a 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 reflecting 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 emerges.

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

[0020] The reflection surface of the first reflection prism and the reflection surface of the second reflection 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 after 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-transmissive 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.

[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 the two eyes.

[0026] In order to solve the above technical problems, the present invention further 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 from the light source to 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 also 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 two 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 type includes 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 after the white light is diffracted by the first outcoupling region and / or the second outcoupling region, 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.

[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, the optical waveguide system is split by the 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 respectively emerge from the corresponding outcoupling areas in the holographic optical waveguide, and the binoculars can receive the light beams emitted from the corresponding outcoupling areas, thereby achieving a stereoscopic visual effect; secondly, since the splitting system is used to split the light beam 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 since the holographic optical waveguide is generally mainly composed of thin glass, its volume and weight are small, which is convenient to carry and use, thereby improving the user's 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 as the above-mentioned optical waveguide system or binocular optical system, and has the same effects as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces 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 creative work.

[0036] FIG1 is a schematic diagram of an optical waveguide system provided by an embodiment of the present invention;

[0037] FIG2 is a schematic structural diagram of a first optical waveguide system provided by an embodiment of the present invention;

[0038] FIG3 is a schematic structural diagram of a second optical waveguide system provided by an embodiment of the present invention;

[0039] FIG4 is a schematic diagram of a binocular optical system provided by an embodiment of the present invention;

[0040] FIG5 is a schematic structural diagram of a first binocular optical system provided by an embodiment of the present invention;

[0041] FIG6 is a schematic diagram of the structure of a second binocular optical system provided by an embodiment of the present invention.

[0042] The accompanying drawings are marked as follows: 10-light source; 20-light combining element; 30-collimating element; 40-light splitting 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 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0044] The core of the present invention is to provide an optical waveguide system, a binocular optical system and binoculars 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 scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. FIG1 is a schematic diagram of an optical waveguide system provided by an embodiment of the present invention, as shown in FIG1 , comprising a light splitting system 40 and a holographic optical waveguide 50, the holographic optical waveguide 50 comprising an incoupling region located in the middle, and a first outcoupling region and a second outcoupling region located at both ends, 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;

[0046] The light 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 in the holographic light waveguide 50 along a first direction, and is transmitted to the first outcoupling region of the holographic light waveguide 50 after total reflection, and then emerges;

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

[0049] There is no limitation on the adopted light splitting system 40, as long as it can split the light beam into the first light beam and the second light beam. The light splitting system 40 can be located inside the holographic waveguide 50 or outside the holographic waveguide 50. When the light splitting system 40 is located inside the holographic waveguide 50, the light splitting system 40 adopts a grating group located in the middle position inside the holographic waveguide 50, and the grating group includes a transmission grating (also called a light 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 by transmission, and form the first light beam by 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 is transmitted along the second direction in the holographic waveguide 50 and finally emitted from the second outcoupling region. In order to improve the stability of the optical waveguide system, the light splitting system 40 and the holographic waveguide 50 are integrated structures.

[0052] In order to make those skilled in the art better understand the optical waveguide system when the light splitting system 40 of the present invention is located inside the holographic optical waveguide 50, the optical waveguide structure is described below in conjunction with FIG2. FIG2 is a schematic diagram of the structure of the first optical waveguide system provided by an embodiment of the present invention. As shown in FIG2, the optical waveguide system is a holographic optical waveguide 5 with a beam splitting function. At this time, the light splitting system 40 is a light-transmissive 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 area, the light first propagates to the light-transmitting holographic grating 5.1. At this time, a part of the light is changed in propagation direction 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 changed in propagation direction by it 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 area after multiple total reflections, and are modulated and deflected by the holographic grating 5.3 set in the coupling-out area and then emitted into the human eye 6.

[0053] It is worth noting that the holographic grating 5.3 used in the embodiment of the present invention is made by a process similar to that of holographic photos, and has the advantages of being thin and light, and having high diffraction efficiency. According to the grating equation mλ=d(sinα±sinβ), the diffraction angle β is the propagation direction of the light after the light passes through the grating, where the diffraction wavelength (λ) is a constant. By adjusting the grating order (m), the incident angle (α) and the grating constant (d), the light can be modulated, that is, the light after passing through the grating is propagated in a specified direction.

[0054] In addition to the above-mentioned arrangement of the light splitting system 40 inside the holographic optical waveguide 50, in practice, in order to reduce the cost, the light splitting system 40 can also be arranged outside the holographic optical waveguide 50. Specifically, the light splitting system 40 uses a light splitting mirror 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 light splitting mirror group includes a semi-transparent and semi-reflective 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 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;

[0058] 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 in the second holographic optical waveguide along the second direction, and is transmitted to the second coupling-out region of the second holographic optical waveguide after total reflection and then emerges.

[0059] In order to prevent the coupling region of the holographic optical waveguide 50 from receiving two beams of light, in practice, a certain interval is set between the coupling regions of the two holographic optical waveguides 50. At the same time, in order 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 limitation on the number of the reflective prisms 8 used, but at least one reflective prism 8 is included. In order 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 at the same time 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 after passing through the semi-transparent and semi-reflective mirror 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] 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 when the optical splitting system 40 of the present invention is located outside the holographic optical waveguide 50, the optical waveguide structure is described below in conjunction with Figure 3. Figure 3 is a schematic diagram of the structure of the second optical waveguide system provided by an embodiment of the present invention. As shown in Figure 3, the optical waveguide system includes a second semi-transparent mirror 7, a reflecting prism 8 and a common holographic optical waveguide 9. At this time, the optical splitting system 40 is the second semi-transparent mirror 7 and three reflecting prisms 8. The second semi-transparent and semi-reflective prism 7 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; the reflecting prism 8 reflects and deflects the split light, so that the propagation direction of the light beam changes twice, so that the light beam is emitted from the reflecting prism 8 and enters the coupling-in area of ​​the ordinary holographic optical waveguide 9; the coupling-in area of ​​the ordinary holographic optical waveguide 9 receives the incident light beam, and the holographic grating 5.3 in the coupling-in area changes the propagation direction of the incident light beam, so that the light beam propagates along the inside of the optical waveguide, and after reaching the decoupling area, the propagation direction of the light beam is changed again by the holographic grating 5.3 in the decoupling area, and enters the human eye 6.

[0066] In the optical waveguide system provided in this embodiment, the light 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 finally respectively emerge from the corresponding outcoupling areas in the holographic optical waveguide 50. The binoculars can receive the light beams emitted from the corresponding outcoupling areas, thereby achieving a stereoscopic visual effect. Secondly, since the light splitting system 40 is used to split the light beam 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 since the holographic optical waveguide 50 is generally mainly composed of thin glass, its volume and weight are small, and it is easy to carry and use.

[0067] The optical waveguide system is described in detail above. On the basis of the above optical waveguide system, this embodiment further provides a binocular optical system, including a light source 10, a collimating element 30 and the above optical waveguide system; the collimating element 30 is located on the optical path between the light source 10 and the holographic optical waveguide 50. There is no limitation on the light source 10, such as a single light source or multiple light sources. Specifically, the light source 10 can be a laser light source but is not limited to a laser light source, and can also be a light emitting diode (LED) light source, a display light source, a light source with a divided 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 various electronic imaging information. When the light source 10 used is multiple light sources, there is no limitation on the multiple light sources. 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 them to the collimating element 30. As shown in FIG4 , FIG4 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 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 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 in the holographic light waveguide 50 along a first direction, and is transmitted to the first outcoupling region of the holographic light waveguide 50 after total reflection, and then emerges;

[0071] The second light beam is transmitted along the second direction in the holographic optical waveguide 50, and is transmitted to the second coupling-out region of the holographic optical waveguide 50 after total reflection, wherein the first direction and the second direction are different. There is no limitation on the image source used. In order to reduce the volume of the optical waveguide system, the image source used is a micro display screen 1. The image source and the point light source 2 are combined by the light combining element 20. There is no limitation on the light combining element 20 used. For example, if the light combining element 20 used is a semi-transparent and semi-reflective mirror, the first light source and the second light source are respectively located on both sides of the semi-transparent and semi-reflective 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 may be a single lens or a combined lens.

[0073] The light beam after the collimating element 30 enters the light splitting system 40 and is split into a first light beam and a second light beam transmitted in opposite directions. The subsequent light path is the same as the optical waveguide system described above, and will not be described again 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 external scene through the outcoupling area, in implementation, the first outcoupling area and / or the second outcoupling area are also arranged on the white light path (which can be achieved by setting the outcoupling area as a translucent medium), and the white light is diffracted by the first outcoupling area and / or the second outcoupling area, 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. When the light source used is a single light source, a dual-light system consisting of a single light source + white light will be formed; when the light source used is a multi-light source, a multi-light system consisting of a multi-light source + white light will be formed, which improves the user experience when using the binocular optical system.

[0075] In order to enable those skilled in the art to better understand the binocular optical system of the present invention, the structure of the binocular optical system is described below in conjunction with FIG5. FIG5 is a schematic diagram of the structure of the first binocular optical system provided by an embodiment of the present invention. As shown in FIG5, 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 coupling-in region of the holographic optical waveguide 5 with a beam splitting function includes a light-transmissive holographic grating 5.1 (i.e., a transmission grating) and an opaque holographic grating 5.2 (i.e., a reflection grating). In order to achieve a binocular stereoscopic observation effect, the holographic optical waveguide 5 with a beam splitting function corresponds to two coupling-out regions.

[0076] The micro display screen 1 is used to display the required picture 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 is emitted in the form of parallel light;

[0080] The holographic optical waveguide 5 with beam splitting function has the function of beam splitting light in the coupling-in area. After reaching the coupling-in area, the light first propagates to the light-transmitting holographic grating 5.1, at which time a part of the light is changed in propagation direction 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 which time all the light is changed in propagation direction by it 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 area after multiple total reflections, and are modulated and deflected by the holographic grating 5.3 set in the coupling-out area and then emitted into 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, the light emitted by the micro display screen 1 and the point light source 2 is collimated by the collimating lens 4 and then incident as parallel light into the coupling region of the holographic optical waveguide 5 with a beam splitting function. The coupling region has a light-transmitting holographic grating 5.1 and a light-impermeable holographic grating 5.2. After reaching the coupling region, the light first propagates to the light-transmitting holographic grating 5.1. At this time, a part of the light is changed in propagation direction by the grating and propagates toward the top of the waveguide plate; the remaining light passes through the grating and propagates to the light-impermeable holographic grating 5.2. At this time, all the light is changed in propagation direction by the light-impermeable 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 coupling region after multiple total reflections, are modulated and deflected by the holographic grating 5.3 therein, and then are emitted, and are superimposed with the direct light of the external scene and enter the human eye 6. It can be seen that by arranging the light splitting system 40 inside the holographic light waveguide 50, the binocular holographic light waveguide optical system has a compact structure, a small volume and is easy to carry.

[0083] Figure 6 is a schematic diagram of the structure of a second binocular optical system provided in an embodiment of the present invention. As shown in Figure 6, 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 picture 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 is emitted in the form of 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, so that the propagation direction of the light changes twice, so that the light is emitted from the reflecting prism 8 and enters the coupling region of the common holographic optical waveguide 9;

[0090] The coupling-in area of ​​the common holographic optical waveguide 9 receives incident light, and the holographic grating 5.3 in the coupling-in area changes the propagation direction of the incident light, so that the light propagates along the inside of the optical waveguide. After the light reaches the coupling-out area, the propagation direction is changed again by the holographic grating 5.3 in the coupling-out area 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 finally emitted from the corresponding outcoupling areas in the holographic optical waveguide 50, respectively. The binoculars can receive the light beams emitted from the corresponding outcoupling areas, thereby achieving a stereoscopic visual effect. Secondly, since the light beam emitted by the light source 10 is divided into the first light beam and the second light beam by the light splitting system 40, two display screens are not required in the optical waveguide system provided by the present invention, and a holographic optical waveguide 50 is adopted. 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 adopted includes an image source and a point light source 2, and the light is combined by the light combining element 20 for transmission, and 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 also receive the image of the external scene 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 application in the optical waveguide system, based on the advantages of binocular system such as stereoscopic visual effect, 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 beam splitting function, which further reduces the volume of the binocular optical system; in the second optical waveguide system, the holographic optical waveguide 5 with 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 are described above. This embodiment also provides a pair of binoculars, including the optical waveguide system or the binocular optical system. The embodiments of the optical waveguide system and the binocular optical system have been described in detail above, and the embodiments of the binoculars will not be described here in detail, and the effects are the same as above.

[0095] The above is a detailed introduction to an optical waveguide system, a binocular optical system and binoculars provided by the present invention. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

[0096] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used 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 "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. An optical waveguide system, characterized in that: The holographic optical waveguide (50) 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 light 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 emerges; The second light beam is transmitted in the holographic light waveguide (50) along a second direction, and after total reflection, is transmitted to a second outcoupling region of the holographic light waveguide (50) for emission; wherein the first direction and the second direction are opposite.

2. The optical waveguide system according to claim 1, characterized in that The light 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 to form 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, characterized in that The light splitting system (40) and the holographic optical waveguide (50) are an integrated design structure.

4. The optical waveguide system according to claim 1, characterized in that The light splitting system (40) uses a beam splitter group located outside the holographic light waveguide (50), the holographic light waveguide (50) comprises a first holographic light waveguide and a second holographic light waveguide, the coupling-in region comprises a first coupling-in region located in the first holographic light waveguide and a second coupling-in region located in the second holographic light waveguide; the beam splitter group comprises 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 a light beam transmitted by the semi-transparent and semi-reflective mirror, and the second light beam is a 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 a 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 emerges.

5. The optical waveguide system according to claim 4, characterized in that The reflecting prism (8) comprises a first reflecting prism, a second reflecting prism and a third reflecting prism; The reflection surface of the first reflection prism and the reflection surface of the second reflection 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 after 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, characterized in that The semi-transmissive 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 1, characterized in that 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) comprises a first light source and a second light source, and the sight further comprises a light combining element (20), wherein the light combining element (20) is located on an optical path between the light source (10) and the collimating element (30), and is used for combining a light beam emitted by the first light source and a 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 two sides of the semi-transparent and semi-reflective mirror.

11. The binocular optical system according to claim 9, characterized in that: 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.

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 after the white light is diffracted by the first outcoupling region and / or the second outcoupling region, it is emitted to a 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.

Images