Optical module and near-to-eye display equipment

Abstract

The utility model relates to an optical module and a near-to-eye display device. The optical module comprises a prism unit, a reflection unit and an image display unit. Each prism unit comprises a first prism and a second prism which are glued with each other so as to be provided with a gluing layer, the first prism is provided with a first surface and a second surface which are inclined to the gluing layer, and the second prism is provided with a seventh surface which is inclined to the gluing layer and is arranged opposite to the second surface and a sixth surface located on the gluing layer; the first surface is a convex surface. The image display units are movably arranged on the first surface at intervals, and the minimum distance between the image display units and the first surface is larger than or equal to 0.5 mm. The reflection units are arranged on the second surface at intervals and are provided with fourth surfaces facing the second surface and fifth surfaces deviating from the second surface, and the fifth surfaces are outwards convex surfaces. In this way, the gap reserved between the image display unit and the first surface is reduced, and the height of the whole near-to-eye display device is reduced; and the assembling allowance is reserved for the optical machine bearing structure, so that the strength of the bearing structure is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to near-to-eye display technical field, especially optical module and near-to-eye display device. BACKGROUND

[0002] Near-to-eye display, also called head-mounted display or wearable display, can create virtual image in single or double eye field of view. Near-to-eye display renders light field information to human eyes through display device placed in non-visual distance of human eyes, and then reconstructs virtual scene in front of eyes. Due to head-mounted wearable device, the main direction of near-to-eye display product iteration is miniaturization and lightness from the actual use experience of users.

[0003] Main near-to-eye display prism schemes include conventional prism scheme and free-form surface prism scheme. The conventional prism scheme is provided with a reflecting mirror on the side of the cemented prism away from human eyes, and an imaging lens or a group of imaging lenses are arranged between the cemented prism and the display screen on the upper side. The imaging lens is usually displaced together with the display screen to realize diopter adjustment. However, a certain assembly gap needs to be kept between the display screen and the imaging lens, and in addition, the adjustment gap between the imaging lens and the prism leads to large overall height of the conventional prism scheme device. In the free-form surface prism scheme, the cemented surface of the prism is a free-form surface. However, the off-axis free-form surface has large processing difficulty and high assembly difficulty, and the quality control cost of the product is high during batch production. SUMMARY

[0004] The conventional prism scheme and the free-form surface prism scheme based on the near-to-eye display device respectively have problems of large overall height of the complete machine and high production difficulty. It is necessary to provide the optical module and the near-to-eye display device.

[0005] The optical module is used for projecting a picture towards an eye pupil and comprises:

[0006] The prism unit comprises a first prism and a second prism that are cemented to each other to have a cemented layer. The first prism has a first surface and a second surface that are inclined to the cemented layer, and a third surface located at the cemented layer. The second prism has a seventh surface that is inclined to the cemented layer and arranged opposite to the second surface, and a sixth surface located at the cemented layer. The first surface is an outer convex surface. An optical axis of the seventh surface is perpendicular to the eye pupil and passes through the center of the eye pupil.

[0007] The image display unit is movably and spacedly arranged at the first surface. The minimum distance between the image display unit and the first surface is greater than or equal to 0.5 mm.

[0008] The reflection unit is arranged at the second surface and has a fourth surface facing the second surface and a fifth surface facing away from the second surface, and the optical axis of the fourth surface and the optical axis of the fifth surface are respectively coincident with the chief ray of the central field of view of the optical module.

[0009] In this way, since the first prism has the outwardly convex first surface, the gap reserved between the image display unit and the first surface is reduced, so that the height of the entire near-eye display device can be reduced. At the same time, in order to reserve an assembly allowance for the assembly of the image display unit and the prism unit, the distance between the image display unit and the first surface is greater than 0.5 mm, so that extrusion or scratching between the image display unit and the first surface is avoided.

[0010] In one of the embodiments, the distance between the image display unit and the first surface ranges from greater than or equal to 0.5 mm to less than or equal to 2.5 mm.

[0011] In this way, the air gap between the image display unit and the first surface is variable, and the diopter adjustment is realized by using this feature of the optical module, so that the nearsighted user population with different degrees can be adapted, for example, the air gap of 2.1 mm corresponds to a diopter of 0D (the virtual image distance is 2.5 m), and the air gap of 0.7 mm corresponds to a diopter of -6D (the virtual image distance is 0.167 m).

[0012] In one of the embodiments, when the diopter of the optical module is 0D, the minimum distance between the image display unit and the first surface ranges from greater than or equal to 1.8 mm.

[0013] In this way, it is ensured that the gap between the image display unit and the first surface is sufficient for diopter adjustment.

[0014] In one of the embodiments, the inclination angle of the adhesive layer in the vertical direction ranges from greater than or equal to 20° to less than or equal to 35°.

[0015] In this way, within this range, the light can reach the middle area of the adhesive layer after being reflected from the second surface, and when the image on the image display unit increases, there will be no problem of picture loss from the perspective of the user. The lower limit of the inclination angle is set to 20° in order to ensure that the surface area of the first surface is large enough to increase the amount of incoming light. At the same time, when the diopter is adjusted, the vertical movement range of the screen is small, so that the vertical height of the entire near-eye device can be reduced.

[0016] In one of the embodiments, the first surface is aspherical and the optical axis of the first surface is parallel to the adhesive layer.

[0017] In this way, the symmetry of the coaxial optical system is ensured, which is beneficial to reduce the asymmetric aberration.

[0018] In one embodiment, the optical module has a pupil position, and a horizontal distance between the pupil position and a proximal end of the first surface close to the pupil position is greater than or equal to 10 mm and less than 15 mm;

[0019] The minimum distance between the pupil and the seventh surface is greater than or equal to the horizontal distance between the pupil and the proximal end of the first surface relatively close to the pupil, and the minimum distance between the pupil and the seventh surface is greater than 10 mm and less than or equal to 15 mm.

[0020] With this arrangement, the optical module and optical machine bracket can avoid eyelashes when the user actually uses it, thereby improving the user experience.

[0021] In one embodiment, the seventh surface and / or the fourth surface is a concave aspheric surface.

[0022] This setting helps correct image distortion and increase the eye box, thereby improving imaging quality and user experience.

[0023] In one embodiment, the prism unit further includes a first polarizing film located between the first surface and the image display unit and a second polarizing film located on the seventh surface;

[0024] The reflecting unit includes a lens body providing the fourth surface and the fifth surface, a quarter wave plate located between the second surface and the fourth surface, and a reflecting film layer located on the fifth surface;

[0025] The bonding layer is a beam splitter film, and the beam splitter film includes a third polarizing film and a PBS polarizing reflective film that are bonded to each other.

[0026] Such a setting can reduce the multi-screen problem caused by stray light reflection, ensure the singleness of the picture, enhance the sense of immersion while reducing the feeling of dizziness, and help increase the light energy utilization rate of the overall optical path, thereby increasing the brightness of the image entering the eye and improving image quality.

[0027] This application also provides a near-eye display device, including:

[0028] Optical machine supports; and

[0029] As for the above-mentioned optical module, the optical module is installed on the optical machine bracket.

[0030] With such a configuration and the use of the optical module provided in this application, the overall height and thickness of the near-eye display device are reduced, and the weight is also reduced, which conforms to the development trend of miniaturization and lightweight, and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic structural diagram of an optical module in an embodiment provided in this application;

[0032] Figure 2 for Figure 1 Light path diagram of the optical module shown;

[0033] Figure 3 for Figure 1 Schematic diagram of the exploded structure of the optical module shown;

[0034] Figure 4 This is a schematic structural diagram of an optical module in another embodiment provided in this application.

[0035] Reference numerals:

[0036] 1. First surface; 2. Second surface; 3. Third surface; 4. Fourth surface; 5. Fifth surface; 6. Sixth surface; 7. Seventh surface; 8. Eighth surface; 10. Prism unit; 11. First prism; 111. Reflection part; 112. Refraction part; 12. Second prism; 13. Adhesive layer; 14. First polarizing film; 15. Second polarizing film; 20. Reflection unit; 21. Lens body; 22. Quarter-wave plate; 23. Reflection film layer; 30. Image display unit; 40. Pupil position; 50. Adjustment gap. DETAILED DESCRIPTION

[0037] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0039] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, features defined with "first", "second" or "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0040] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0042] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0043] Near-to-eye display, also known as head-mounted display or wearable display, can create virtual images in monocular or binocular field of view. Near-to-eye display renders light field information to human eyes through display devices placed in non-visual distance of human eyes, and then reconstructs virtual scene in front of eyes. Since it is a head-mounted wearable device, from the actual use experience of users, the main direction of near-to-eye display product iteration is miniaturization and lightness.

[0044] Mainstream near-eye display prism solutions include conventional prism solutions and free-form prism solutions. The conventional prism solution is to set a reflector on the side of the cemented prism facing away from the human eye. One or a group of imaging lenses are set between the cemented prism and the upper display screen. The imaging lens usually moves with the display screen to achieve diopter adjustment. However, a certain assembly gap needs to be maintained between the display screen and the imaging lens. In addition, the adjustment gap between the imaging lens and the prism results in a relatively large overall height of the conventional prism solution. In the free-form prism solution, the cemented surface of the prism is a free-form surface. However, the off-axis free-form surface is difficult to process and assemble, and the quality control cost of the product is high during mass production.

[0045] Based on this, it is necessary to provide an optical module and a near-eye display device that can reduce the height of the device in the near-eye display optical solution and have lower costs.

[0046] See also Figure 1 、 Figure 2 and Figure 3 , Figure 1 This is a schematic structural diagram of an optical module in an embodiment provided in this application. Figure 2 for Figure 1 The optical path diagram of the optical module shown, Figure 3 for Figure 1 Schematic diagram of the exploded structure of the optical module shown. In one embodiment provided by the present application, the optical module is used to project light toward the pupil, and the optical module includes a prism unit 10, a reflection unit 20, and an image display unit 30. The prism unit 10 includes a first prism 11 and a second prism 12 glued to each other to have a glue layer 13. The first prism 11 has a first surface 1 and a second surface 2 inclined to the glue layer 13 and a third surface 3 located on the glue layer 13. The second prism 12 has a seventh surface 7 inclined to the glue layer 13 and arranged opposite to the second surface 2, and a sixth surface 6 located on the glue layer 13. The first surface 1 is an outward convex surface, and the optical axis of the seventh surface 7 is perpendicular to the pupil and passes through the center of the pupil. The image display unit 30 is movable and spaced apart from the first surface 1. The minimum distance between the image display unit 30 and the first surface 1 is greater than or equal to 0.5 mm. The reflective unit 20 is spaced apart from the second surface 2 and has a fourth surface 4 facing the second surface 2 and a fifth surface 5 facing away from the second surface 2. The optical axis of the fourth surface 4 and the optical axis of the fifth surface 5 coincide with the central field chief ray of the optical module (e.g., Figure 2The fourth surface 4 and the fifth surface 5 are arranged on the same optical axis, the optical axis of the fourth surface 4 does not coincide with the optical axis of the seventh surface 7, but follows the arrangement of the chief ray of the central field of view of the actual optical module, so that the distortion and field curvature of the picture received by the eye pupil are smaller, and the image quality is higher. Specifically, the image display unit 30 emits light towards the first prism 11, the light is reflected twice at the seventh surface 7 of the first prism 11 and the bonding layer 13, and then emitted from the seventh surface 7. After being reflected by the reflection unit 20, the light passes through the first prism 11 and the second prism 12 in turn and reaches the human eye. Since the first prism 11 has the outwardly convex first surface 1, the gap reserved between the image display unit 30 and the first surface 1 is reduced, so that the height of the entire near-eye display device can be reduced. At the same time, in order to reserve assembly clearance for the optical machine abutting structure of the image display unit 30 and the prism unit 10, the minimum distance between the image display unit 30 and the first surface 1 is greater than 0.5mm, so as to avoid extrusion and scratching between the image display unit 30 and the first surface 1, and to facilitate the strength of the abutting structure.

[0047] Optionally, in an embodiment provided by the present application, the seventh surface 7 and the fourth surface 4 are concave aspheric surfaces, which is beneficial to correct the picture distortion and increase the eyebox, thereby improving the imaging quality and user experience. The eyebox is the coverage range of the light at the eye pupil position 40. Figure 2 The eyebox is the coverage range of the light at the eye pupil position 40.

[0048] Optionally, in an embodiment provided by the present application, the fifth surface 5 is an outwardly convex aspheric surface, which can cooperate with the outwardly convex first surface 1 to jointly bear the refractive power adjustment function, and can reduce the bending degree of the first surface 1, thereby reducing the overall height of the optical module.

[0049] Optionally, in one embodiment provided in the present application, the distance range between the image display unit 30 and the first surface 1 is greater than or equal to 0.5 mm and less than or equal to 2.5 mm. In order to simplify the description, the minimum distance between the image display unit 30 and the first surface 1 is set to the adjustment gap 50. The adjustment gap 50 between the image display unit 30 and the first surface 1 is variable in size. This feature of the optical module is used to achieve diopter adjustment, thereby adapting to myopic users with different degrees. For example, when the adjustment gap 50 is 2.1 mm, the corresponding diopter is 0D (virtual image distance is 2.5 m), when the adjustment gap 50 is 1.5 mm, the corresponding diopter is -3D (virtual image distance is 0.333 m), and when the adjustment gap 50 is 0.7 mm, the corresponding diopter is -6D (virtual image distance is 0.167 m). Specifically, in one embodiment provided herein, the optical module has a diopter adjustment range of 0D to -6D, with 0D being suitable for users with normal or corrected-to-normal vision, and -6D being the maximum diopter suitable for myopic users. Furthermore, in one embodiment provided herein, when the diopter of the optical module is 0D, the distance between the image display unit 30 and the first surface 1 is greater than or equal to 1.8mm, ensuring that the gap between the image display unit 30 and the first surface 1 is sufficient for diopter adjustment.

[0050] Optionally, in one embodiment provided in the present application, the vertical inclination angle of the adhesive layer 13 is greater than or equal to 20° and less than or equal to 35°. Since light is reflected twice in the prism unit 10, in order to make the direction of the light emitted from the seventh surface 7 horizontal, the inclination angle of the adhesive layer 13 with the vertical direction should be less than 45°. Furthermore, the present application sets the upper limit of the inclination angle to 35°. Within this range, light can reach the middle area of ​​the adhesive layer 13 after being reflected from the second surface 2. When the image on the image display unit 30 is enlarged, there will be no problem of image loss from the user's perspective. The lower limit of the inclination angle is set to 20° to ensure that the surface area of ​​the first surface 1 is large enough, thereby increasing the amount of light entering. At the same time, when the diopter is adjusted, the vertical range of the screen is small, thereby reducing the vertical height of the entire near-eye device.

[0051] Furthermore, in an embodiment provided in the present application, the first surface 1 is an aspheric surface and the optical axis of the first surface 1 is parallel to the cementing layer 13. This ensures the symmetry of the coaxial optical system and helps to reduce asymmetric aberrations.

[0052] Optionally, in one embodiment provided herein, the optical module has a pupil position 40, and the horizontal distance between the pupil position 40 and the near end of the first surface 1 relatively close to the pupil position 40 is greater than or equal to 10 mm and less than 15 mm; the minimum distance between the pupil position 40 and the seventh surface 7 is greater than the horizontal distance between the pupil position 40 and the near end of the first surface 1 relatively close to the pupil position 40, and the minimum distance between the pupil position 40 and the seventh surface 7 is greater than or equal to 10 mm and less than or equal to 15 mm. Both the lower end of the first surface 1 and the seventh surface 7 maintain a certain distance from the human eye, which can avoid eyelashes and enhance the user experience. It is understandable that the mass of the second prism 12 can also be reduced accordingly, thereby reducing the overall weight of the near-eye display device.

[0053] Furthermore, in one embodiment provided herein, the vertical inclination angle of the second surface 2 ranges from greater than or equal to -2° to less than or equal to 2°. In other words, the design of the second surface 2 allows for an adjustment range of ±2°, which helps increase the degree of freedom in aberration correction while ensuring image clarity.

[0054] Optionally, in one embodiment provided herein, the second prism 12 has a downward-facing eighth surface 8, and the horizontal inclination angle of the eighth surface 8 ranges from greater than or equal to -3° to less than or equal to 3°. This increases the degree of freedom for aberration correction while ensuring the integrity of the image. Preferably, the inclination angle is 2°, and the end of the eighth surface 8 closer to the pupil 40 is higher than the end of the eighth surface 8 closer to the reflective unit 20. This also helps reduce the weight of the second prism 12. It is worth noting that the degree of inclination of the eighth surface 8 is exaggerated in the figure to indicate that the eighth surface 8 can be designed to be inclined.

[0055] See also Figure 3In order to realize the above optical path, the optical architecture adopted by the present application includes the following specific structure. The prism unit 10 further includes a first polarizing film 14 located between the first surface 1 and the image display unit 30, and a second polarizing film 15 located on the seventh surface 7. The reflection unit 20 includes a lens body 21 providing the fourth surface 4 and the fifth surface 5, a quarter-wave plate 22 located between the second surface 2 and the fourth surface 4, and a reflection film layer 23 located on the fifth surface 5. The adhesive layer 13 is a beam splitting film, which includes a third polarizing film and a PBS polarizing reflection film attached to each other. In this way, the problem of multiple images caused by stray light reflection can be reduced, the uniqueness of the image can be ensured, the sense of immersion can be improved, the dizziness can be reduced, the light energy utilization rate of the overall optical path can be increased, the image brightness into the eye can be increased, and the image quality can be improved. Optionally, the first polarizing film 14 is located on the first surface 1, and the quarter-wave plate 22 is located on the fourth surface 4. It can be understood that in other embodiments, the first polarizing film 14 can also be attached to the image display unit 30, or the first polarizing film 14 can also be arranged separately from the image display unit 30 and the first surface 1, and the quarter-wave plate 22 can also be located on the second surface 2, or the quarter-wave plate 22 can also be arranged separately from the second surface 2 and the fourth surface 4. It can be understood that when the optical module is adapted to a VR device, the reflection film layer 23 adopts a mirror reflection film, i.e. a total reflection film; when the optical module is adapted to an AR device, the reflection film layer 23 adopts a half-reflective and half-transmissive film. It can be understood that in other embodiments, the beam splitting film can also adopt a conventional BS film or a combination of other conventional films, as long as it can realize the function of partial reflection / partial transmission.

[0056] Please refer to Figure 4 , Figure 4 In another embodiment of the present application, the structure of the optical module is shown in the schematic diagram. Optionally, in order to reduce the processing difficulty, in an embodiment of the present application, the first prism 11 includes a reflection part 111 attached to the beam splitting film and providing the second surface 2, and a refractive part 112 attached to the reflection part 111 and providing the first surface 1. The attached surface of the refractive part 112 and the reflection part 111 is the adhesive plane. When the first surface 1 cannot meet the quality requirements, only the refractive part 112 with a smaller lens body needs to be replaced, and the entire first prism 11 does not need to be discarded, thereby reducing the waste in the production process and reducing the cost.

[0057] The present application also provides a near-eye display device, which includes an optical machine support and an optical module as described above, and the optical module is installed on the optical machine support.

[0058] The technical features of the above-mentioned embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present application.

[0059] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. An optical module for projecting an image toward the pupil, characterized in that: include: A prism unit comprising a first prism and a second prism glued to each other to form a glue layer, wherein the first prism has a first surface and a second surface inclined to the glue layer, and a third surface located on the glue layer, and the second prism has a seventh surface inclined to the glue layer and arranged opposite to the second surface, and a sixth surface located on the glue layer, wherein the first surface is an outwardly convex surface, and the optical axis of the seventh surface is perpendicular to the pupil and passes through the center of the pupil; an image display unit, movably and spaced apart from the first surface, wherein a minimum distance between the image display unit and the first surface is greater than or equal to 0.5 mm; and The reflecting unit is spaced apart from the second surface and has a fourth surface facing the second surface and a fifth surface facing away from the second surface. The optical axes of the fourth surface and the fifth surface respectively coincide with the central field chief ray of the optical module.

2. The optical module according to claim 1, wherein: The distance between the image display unit and the first surface is greater than or equal to 0.5 mm and less than or equal to 2.5 mm.

3. The optical module according to claim 2, wherein: When the refractive power of the optical module is 0D, the distance range between the image display unit and the first surface is greater than or equal to 1.8 mm.

4. The optical module according to claim 1, wherein: The vertical inclination angle of the glue layer is greater than or equal to 20° and less than or equal to 35°.

5. The optical module according to claim 4, wherein: The first surface is an aspherical surface, and the optical axis of the first surface is parallel to the bonding layer.

6. The optical module according to claim 1, wherein: The optical module has a pupil position, and a horizontal distance between the pupil position and a proximal end of the first surface close to the pupil position is greater than or equal to 10 mm and less than 15 mm; The minimum distance between the pupil and the seventh surface is greater than or equal to the horizontal distance between the pupil and the proximal end of the first surface relatively close to the pupil, and the minimum distance between the pupil and the seventh surface is greater than 10 mm and less than or equal to 15 mm.

7. The optical module according to claim 1, wherein: The seventh surface and / or the fourth surface is a concave aspheric surface.

8. The optical module according to any one of claims 1 to 7, wherein: The prism unit further includes a first polarizing film located between the first surface and the image display unit and a second polarizing film located on the seventh surface; The reflecting unit includes a lens body providing the fourth surface and the fifth surface, a quarter wave plate located between the second surface and the fourth surface, and a reflecting film layer located on the fifth surface; The bonding layer is a beam splitting film.

9. The optical module according to claim 8, wherein: The beam splitting film includes a third polarizing film and a PBS polarizing reflective film which are attached to each other.

10. A near-eye display device, characterized in that include: Optical machine bracket; and The optical module according to any one of claims 1 to 9, wherein the optical module is mounted on the optical machine bracket.

Images