CN210776034U - Short-distance optical system - Google Patents
Short-distance optical system Download PDFInfo
- Publication number
- CN210776034U CN210776034U CN201921374216.9U CN201921374216U CN210776034U CN 210776034 U CN210776034 U CN 210776034U CN 201921374216 U CN201921374216 U CN 201921374216U CN 210776034 U CN210776034 U CN 210776034U
- Authority
- CN
- China
- Prior art keywords
- optical system
- lens group
- partially
- lens
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The present invention provides a short-distance optical system, which comprises a display screen, an optical module comprising a reflective polarizer, a first phase retarder, a partially transmissive partially reflective element and at least one optical element, and at least two lens assemblies, which are respectively disposed on either side of the elements in the optical module. After the display screen outputs images and emits light rays, the light rays are partially penetrated and partially reflected through the reflective polarizing film, the penetrated light rays are subjected to first phase delay through the first phase delay sheet and partially penetrated through the partially penetrated and partially reflected reflecting element, and partially reflected back to the first phase delay sheet and the reflective polarizing film to be subjected to second and third phase delay, then, the light rays subjected to the third phase delay are subjected to fourth phase delay through the optical element, and then the images are guided into at least one human eye through the lens group.
Description
Technical Field
The present invention relates to an optical system, and more particularly, to a short-distance optical system applicable to a head-mounted display.
Background
A Head-mounted display (Head-mounted display) is a device for displaying images and colors, and is usually in the form of an eye mask or a helmet, in which a display screen is placed close to the eyes of a user, and the focal length is adjusted through an optical path to project pictures to the eyes at a short distance, thereby creating a virtual reality effect and increasing the sense of presence of the wearer.
Fig. 1 is a schematic diagram of an optical system of a virtual reality head-mounted display, in which a display screen 10 projects an image, and the image passes through a light path with an optical path length d and then enters a lens group 22, the lens group 22 is a single lens or a combination of multiple lenses for guiding the image into a human eye 24 of a user, assuming that the optical path length d is 40mm, and the length of the head-mounted display is the optical path length d plus the thickness, eye distance, and housing of the lens group, the sum of which is slightly heavy for an eye mask and a helmet worn on the head, and causes a burden on the nose bridge, the top of the head, and the neck of the user, and thus the current technology is dedicated to shorten the length of the optical system in the head-mounted display, so as to reduce the thickness of the head-mounted display, and facilitate the wearing and using of the user.
Therefore, the present invention provides a short-distance optical system, which can shorten the distance of the optical system and further expand the field of view, so as to effectively solve the above problems, and the specific structure and the implementation thereof will be described in detail later.
SUMMERY OF THE UTILITY MODEL
The main objective of the present invention is to provide a short-distance optical system, in which optical elements such as a reflective polarizer, a phase retarder, a partially transmissive partially reflective element, etc. are disposed between a display screen and a lens assembly, and the optical path with similar or identical length is achieved by using the phase retardation and multiple reflections of light, so as to shorten the distance between the display screen and the lens assembly, and finally, the head-mounted display can be miniaturized.
Another objective of the present invention is to provide a short-distance optical system, in which all the optical elements are coaxially arranged, and are adjusted according to the polarization condition of the display screen, so as to increase the variability and flexibility of the configuration of the optical system while shortening the distance between the display screen and the lens set.
It is still another objective of the present invention to provide a short-distance optical system, which can be applied to a wide-angle lens or a wide-angle eyepiece of a head-mounted display, a game machine, etc. and can achieve good aberration correction by using two lens assemblies to adjust the focal length, which has a short distance and a large field of view.
To achieve the above object, the present inventor provides a short-distance optical system, comprising: a display screen for outputting images and emitting light; an optical module, comprising: a reflection type polaroid which is arranged corresponding to the display screen and enables the light to partially penetrate and partially reflect; a first phase retardation plate arranged corresponding to the reflective polarizer, receiving the light rays partially penetrating the reflective polarizer, and performing a first phase retardation; a partial transmission partial reflection element corresponding to the first phase retardation plate, so that the light beam after the first phase retardation partially penetrates the partial transmission partial reflection element, and part of the light beam is reflected back to the first phase retardation plate for the second and third phase retardation; at least one optical element, which is arranged corresponding to the partial transmission partial reflection element, receives the light which penetrates the partial transmission partial reflection element and passes through the second and third time phase delays, performs the fourth time phase delay, and allows the light which only passes through the two time phase delays not to pass through but only passes through the light which passes through the four time phase delays; and at least two lens groups respectively arranged on any side of at least one of the optical modules so as to adjust the focal length and guide the image into at least one human eye.
According to an embodiment of the present disclosure, the optical device includes: a second phase delay plate, which is arranged corresponding to the partial transmission partial reflection element, receives the light rays which partially penetrate the partial transmission partial reflection element and pass through the second and third time phase delays, and performs the fourth time phase delay; and a linear polarizer disposed corresponding to the second phase retarder, the linear polarizer being configured to let the light delayed by two times not pass through and let the light delayed by four times pass through.
According to another embodiment of the present invention, the optical element is a circularly polarizing plate.
According to the embodiment of the present disclosure, the light reflected by the partially transmissive partially reflective element back to the first retardation plate passes through the first retardation plate after the second phase retardation, reaches the reflective polarizer, and is totally reflected on the reflective polarizer, so that the light is reflected back to the first retardation plate and is subjected to the third phase retardation, and then passes through the first retardation plate and the partially transmissive partially reflective element to reach the second retardation plate.
According to the present embodiment, the first, second, third and fourth phase retardations are increased by phase retardations of 1/4 odd multiples of the wavelength, so that the light reaching the lens assembly is delayed by an integer multiple of 1 wavelength.
According to the embodiment of the present disclosure, the light emitted from the display panel and entering the reflective polarizer is linearly polarized light. The linearly polarized light is converted into left circularly polarized light or right circularly polarized light after passing through the first phase retarder.
According to an embodiment of the present invention, a line polarizer is further included between the second phase retardation plate and the human eye for allowing the light delayed by two times to not pass and the light delayed by four times to pass.
According to the embodiment of the present disclosure, at least one flat glass may be placed between the human eye and the lens assembly, at least one flat glass may be placed between the lens assembly and the display screen, and at least one of the corresponding optical modules is disposed on the flat glass, and the material of the at least one flat glass may be a thin film material or an optical coating film disposed on the flat glass in a coating, plating, or bonding manner.
Drawings
Fig. 1 is a schematic diagram of an optical path between a display screen of a head-mounted display and a human eye in the prior art.
FIG. 2 is a schematic diagram of an embodiment of the present invention.
Fig. 3A to 3C are flowcharts illustrating steps of the present invention for a short-distance optical system.
FIGS. 4A to 4E are schematic diagrams illustrating different configurations of two lens groups in the present invention.
List of reference numerals: 10-a display screen; 12-a reflective polarizer; 14-a first phase retarder; 16-partially transmissive partially reflective element; 18-a second phase delay plate; 20-linear polarizer; 22-a lens group; 24-human eye; 26-plate glass; 30-a first lens group; 32-second lens group.
Detailed Description
The present invention provides a short-distance optical system, which is applied to a head-mounted display, especially a virtual reality system of the head-mounted display, because the optical system is worn on the head of a user, if the optical system is too large and too long, the optical system is difficult to fix on the head of the user and can fall under the influence of gravity, and the head and the neck of the user can be further burdened, so that the size of the head-mounted display is better, especially the length of the head-mounted display needs to be shortened.
Please refer to fig. 2, which is a schematic diagram of an embodiment of the present short-distance optical system, comprising a reflective polarizer 12, a first phase retarder 14, a partially transmissive partially reflective element 16, a second phase retarder 18, a linear polarizer 20 and two lens assemblies 22 sequentially disposed between a display screen 10 and at least a human eye 24, wherein the display screen 10 outputs an image and emits light, which is polarized light or unpolarized light, in this embodiment, the polarized light is linearly polarized light, and further, the polarization direction of the linearly polarized light in this embodiment is perpendicular to the optical path; the reflective polarizer 12 is disposed corresponding to the display screen 10, receives the polarized light emitted by the display screen 10, and partially transmits and partially reflects the polarized light, and particularly, the reflective polarizer 12 adopted in the present creation includes two polarization directions perpendicular to and parallel to the light path, where the perpendicular is a transmission axis and the horizontal is a reflection axis; a first phase retarder 14 disposed corresponding to the reflective polarizer 12 for receiving the polarized light partially transmitted from the reflective polarizer 12 and performing a first phase retardation; the partially-transmitting partially-reflecting element 16 is disposed corresponding to the first phase retardation plate 14, receives the light passing through the first phase retardation plate 14, partially reflects and partially transmits the light passing through; the second phase retardation plate 18 is disposed corresponding to the partially-transmissive partially-reflective element 16, receives the light partially transmitted through the partially-reflective element 16, and performs phase retardation; the linear polarizer 20 is disposed corresponding to the second phase retarder 18, and the linear polarizer 20 is configured to let the polarized light with twice phase retardation not pass through and let the polarized light with four times phase retardation pass through, and guide the image into the human eye 24 through the lens set 22.
Specifically, the retardation of 1/4 wavelength can be increased by the angle of 45 degrees between the fast and slow axes of the first retardation plate 14 and the transmission axis of the reflective polarizer 12.
In addition, at least two lens assemblies in the present invention are respectively disposed on any side of at least two elements in the optical module, taking the embodiment of fig. 2 as an example, two lens assemblies 22 are respectively disposed on two sides of the first retarder 14. Each lens group can be a single lens or a multi-lens, and the lens can be an aspheric lens, a Fresnel lens (Fresnel lens) or a combination of multiple lenses.
Referring to fig. 3A to 3C, firstly in fig. 3A, the display screen 10 outputs an image and emits polarized light to the reflective polarizer 12, the reflective polarizer 12 makes part of the polarized light penetrate to the first phase retarder 14 and part of the polarized light is reflected back to the display screen 10, and the polarized light penetrating through the reflective polarizer 12 after passing through the first phase retarder 14 performs a first phase delay and then reaches the partially penetrating partial reflective device 16; referring to fig. 3B, the polarized light after the first time phase retardation partially penetrates through the partially transmissive partially reflective element 16, and a part of the polarized light is reflected back to the first phase retarder 14 for the second time phase retardation, where the polarized light partially penetrating through the partially reflective element 16 is energy loss, and the polarized light after the first time phase retardation penetrates through the first phase retarder 14 and reaches the reflective polarizer 12; referring to fig. 3C again, the reflective polarizer 12 reflects the polarized light after the second phase retardation, reflects the polarized light back to the first phase retarder 14 for the third phase retardation, and then passes through the partially transmissive partially reflective element 16, so that the partially transmissive polarized light (after the third phase retardation) reaches the second phase retarder 18 for the fourth phase retardation; then, the polarized light with the fourth phase retardation passes through the second phase retardation plate 18, and is filtered by the linear polarizer 20, so that only the polarized light with the fourth phase retardation passes through the linear polarizer 20 and is guided into at least one human eye 24 by the lens group 22.
Since the first phase retardation plate 14 and the second phase retardation plate 18 are both odd-numbered multiples of 1/4 wavelength, they are delayed by integer multiples of 1 wavelength after four times of phase delay.
The linearly polarized light is converted into circularly polarized light after passing through the first phase retarder 14, and the circularly polarized light includes left circularly polarized light and right circularly polarized light. However, when part of the circularly polarized light is reflected back to the first retardation plate 14 by the partially transmissive and partially reflective element 16, the circularly polarized light is converted into linearly polarized light again, and then the linearly polarized light is converted into circularly polarized light through the first retardation plate 14, but is converted into linearly polarized light through the second retardation plate 18.
Fig. 4A to 4E illustrate various different methods of disposing two lens assemblies, namely, a first lens assembly 30 and a second lens assembly 32, but the present invention is not limited to the method of disposing the lens assemblies, and at least two lens assemblies for focusing are included in the scope of the present invention, as long as the lens assemblies are disposed on any side of at least one of the reflective polarizer 12, the first phase retarder 14, the partially transmissive partially reflective element 16, the second phase retarder 18, and the linearly polarizer 20.
Further, the material of the optical components such as the reflective polarizer 12, the first phase retarder 14, the partially transmissive partially reflective element 16, the second phase retarder 18 and the linear polarizer 20 may be a film material or an optical coating, and the like, and is disposed on at least one of the flat glass or the lens in the form of coating, coating or bonding, for example, the reflective polarizer 12 and the partially transmissive partially reflective element 16 may be a coating on the lens, or a lens with a reflective polarization function itself or an optical material in the form of a film is attached on the lens, so that the reflective polarizer 12 and the first phase retarder 14 may be integrated, the partially transmissive partially reflective element 16 and the second phase retarder 18 may be integrated, for example, as shown in fig. 4A, the reflective polarizer 12 and the first phase retarder 14 are the same lens group 32 (in this embodiment, the second lens group 32 is a single lens), for example, a reflective polarizing film is disposed on the first retarder 14 near the display 10 or a special material is used to achieve the phase retardation and reflective polarization function of the same lens, and a partially transmissive and partially reflective element 16 (in this embodiment, a partially transmissive and partially reflective film), a second retarder 18, a linear polarizer 20 and a plate glass 26 are disposed in sequence on the left side of the first lens group 30. In other words, in the embodiment of FIG. 4A, the first lens group 30 is disposed between the first retarder 14 and the partially transmissive partially reflective element 16, and the second lens group is disposed between the reflective polarizer 12 and the first retarder 14. The specific data for this example is as follows:
watch 1
A, B, C, D, E in the above table are parameters in the aspheric equation
Wherein C is 1/R, and R is a curvature radius. In the table, f is an effective focal length of the optical system, ω is a half field angle of the optical system, H is a visible range radius of the display screen, f1 and f2 are effective focal lengths of the first and second lens groups, respectively, Nd is a Refractive index (Refractive index), and Vd is an Abbe number (Abbe number) or a dispersion coefficient (V-number).
FIG. 4B shows another embodiment, in which the reflective polarizer 12 is disposed on the display panel 10, the first retardation plate 14 is disposed on the left side of the reflective polarizer 12, the partially transmissive partially reflective element 16 can also be formed on the second lens group 32 by coating or material selection, and the second retardation plate 18 and the linear polarizer 20 are disposed on the right side of the first lens group 30. The specific data for this example are shown in table two below:
watch two
Fig. 4C, 4D and 4E show another three arrangements of the first lens group 30 and the second lens group 32, and the first lens group 30 and the second lens group 32 can be a single lens or a combination of multiple lenses, and can be a concave lens, a convex lens, etc., and the concave-convex direction can be changed, so that various combinations can be generated.
In the embodiment of FIG. 4C, the second lens assembly 32 is disposed between the first retarder 14 and the partially transmissive partially reflective element 16, the partially transmissive partially reflective element 16 of this embodiment is a plated film disposed on the left side of the second lens assembly 32, and the reflective polarizer 12 is disposed on the right side of the second lens assembly 32 and the right side of the first retarder; the first lens group 30 is disposed between the partially transmitting and partially reflecting element 16 and the second phase retarder 18, and the specific data of this embodiment is as follows:
watch III
In the embodiment of fig. 4D, the first lens group 30 and the second lens group 32 are disposed between the first retarder 14 and the partially transmissive portion 16, wherein the reflective polarizer 12 and the first retarder 14 are disposed on the right side of the second lens group 32, the reflective polarizer 12 is disposed on the right side of the first retarder 14, and the partially transmissive portion 16, the second retarder 18, the linear polarizer 20 and the plate glass 26 are disposed on the left side of the first lens group 30, wherein the partially transmissive portion 16 is a coating film disposed on the first lens group 30. The specific data for this example is given in table four below:
watch four
In the embodiment of fig. 4E, the reflective polarizer 12 is disposed on the left side of the display panel 10, and the first lens group 30 and the second lens group 32 are disposed between the first retarder 14 and the partially transmissive partially reflective element 16, the second retarder 18, the linear polarizer 20 and the plate glass 26 are disposed on the left side of the first lens group 30. The specific data for this example are shown in table five below:
watch five
To explain this, the second phase retardation plate 18 and the linear polarizer 20 can be integrated, for example, as shown in fig. 4D, the phase retardation plate 18 and the linear polarizer 20 are on the same side of the same lens 30, which is equivalent to the function of a circular polarizer.
Referring to fig. 4A, the first lens assembly 30 is L1 with an effective focal length of F1, the second lens assembly 32 is L2 with an effective focal length of F2, F is the effective focal length of the optical system, ω is the half field angle of the optical system, H is the visible range radius of the display screen, R1 to R4 are the radius of curvature of the positions shown in the figure, E is the distance from the eye (aperture) to the center of the nearest optical element surface, TTL is the total length of the optical system, and the following formula can be obtained:
the above equations (1), (4) and (5) can achieve good aberration correction, while the equations (2), (3) and (6) can achieve the advantages of larger viewing angle and shorter system distance (thinner and lighter).
The present creation uses the polarization principle to make the light path internally refracted and reflected in the optical system to achieve the effect of shortening the distance between the display screen and the human eyes, taking fig. 4A to 4E as an example, the optical path of the optical element after the polarized light is emitted from the display screen 10 and before the human eye 24 is reflected for multiple times, assuming that in the embodiment of fig. 4A to 4E, the length of each reflection of light from the display screen 10 to the optical elements in front of the human eye 24 plus the total optical path length is d, the optical path d from the display screen 10 to the lens assembly 22 is almost the same as in the prior art of figure 1, however, since in the embodiments of fig. 4A to 4E, the light path from the display screen 10 to the human eye is obtained by summing up multiple reflections, therefore, the length from the display screen 10 to the human eye is substantially shorter than the length from the display screen 10 to the human eye 24 in fig. 1, so as to shorten the length of the optical system.
In summary, the short-distance optical system provided by the present invention sequentially arranges an optical module comprising a plurality of optical elements behind the display screen and in front of the human eye, so as to achieve the purpose of shortening the length of the optical system by multiple reflections of light, and performs four-time phase retardation by using the phase retardation plate, so that the phase of the polarization state of the polarized light finally reaches the human eye and the phase of the polarization state emitted from the display screen at the beginning is delayed by an integral multiple of one wavelength. The present creation further utilizes the design of dual lens set to achieve a good aberration correction effect, and is suitable for wide-angle lens or wide-angle eyepiece, the viewing angle can reach more than 50 degrees, and the length of the optical system is shortened, so that the product (such as head-mounted display) using the optical system can achieve the purpose of being light, thin and miniaturized.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, all the equivalent changes or modifications according to the features and spirit of the claims should be included in the patent claims of this patent.
Claims (16)
1. A short-range optical system, comprising:
a display screen for outputting images and emitting light;
an optical module, comprising:
a reflection type polaroid which is arranged corresponding to the display screen and enables the light to partially penetrate and partially reflect;
a first phase retardation plate arranged corresponding to the reflective polarizer, receiving the light rays partially penetrating the reflective polarizer, and performing a first phase retardation;
a partial transmission partial reflection element corresponding to the first phase retardation plate, so that the light beam after the first time phase retardation partially penetrates the partial transmission partial reflection element, and part of the light beam is reflected back to the first phase retardation plate for the second time and third time phase retardation;
at least one optical element, which is arranged corresponding to the partial transmission partial reflection element, receives the light which penetrates the partial transmission partial reflection element and passes through the second and third time phase delays, performs the fourth time phase delay, and allows the light which only passes through the two time phase delays not to pass through but only passes through the light which passes through the four time phase delays; and
at least two lens groups are respectively arranged on any side of at least one of the optical modules so as to adjust the focal length and guide the image into at least one human eye.
2. A short distance optical system according to claim 1, wherein at least one flat glass is placed between the human eye and the lens assembly, at least one flat glass is also placed between the lens assembly and the display screen, and at least one of the corresponding optical modules is disposed on the flat glass, and the material of the at least one flat glass is a thin film material or an optical coating, and the thin film material is disposed on the flat glass in a coating, coating or bonding manner.
3. A short-range optical system according to claim 1, characterized in that the optical element comprises:
a second phase delay plate, which is arranged corresponding to the partial transmission partial reflection element, receives the light rays which partially penetrate the partial transmission partial reflection element and pass through the second and third time phase delays, and performs the fourth time phase delay; and
and a linear polarizer arranged corresponding to the second phase retarder for allowing the light delayed by two times not to pass through and allowing the light delayed by four times to pass through.
4. A short-range optical system as claimed in claim 1, characterized in that the optical element is a circular polarizer.
5. A short-range optical system as claimed in claim 3, wherein the light reflected from the partially transmissive partially reflective element back to the first retarder passes through the first retarder after the second phase retardation of the first retarder to reach the reflective polarizer, and is reflected on the reflective polarizer to be reflected back to the first retarder and undergo a third phase retardation, and then passes through the first retarder and the partially transmissive partially reflective element to reach the second retarder.
6. A short-range optical system as claimed in claim 1, wherein the first, second, third and fourth phase retardations are each increased by a phase retardation which is an odd multiple of 1/4 wavelengths, so that light reaching the human eye is retarded by an integer multiple of one wavelength.
7. The short-distance optical system as claimed in claim 1, wherein the light beam emitted from the display screen and entering the reflective polarizer is linearly polarized light or circularly polarized light, and a linear polarizer, a circular polarizer or a phase retarder is added between the display screen and the reflective polarizer to adjust the polarization state of the display screen according to the polarization condition of the display screen, the number of the linear polarizer, the circular polarizer or the phase retarder is not limited to one, and the linear polarizer, the circular polarizer or the phase retarder can be made of a thin film material or an optical coating and is placed on the display screen or the reflective polarizer in a coating, coating or bonding manner.
8. The short-range optical system of claim 7, wherein the linearly polarized light is converted into left circularly polarized light or right circularly polarized light after passing through the first phase retarder.
9. A short distance optical system according to claim 1 wherein the at least two lens groups comprise a first lens group and a second lens group, the first lens group having an effective focal length of F1, the second lens group having an effective focal length of F2, the optical system having an effective focal length of F,
10. a short distance optical system according to claim 1, wherein said at least two lens groups comprise a first lens group and a second lens group, the radius of the visible range of the display screen is H, the total length of the optical system is TTL,
11. a short-range optical system according to claim 1, wherein the at least two lens groups comprise a first lens group and a second lens group, the display screen has a radius of visibility H, the optical system has an overall length TTL, the eye is at a distance E from the center of the surface of the closest of the optical modules,
12. a short-range optical system according to claim 1 wherein the at least two lens groups comprise a first lens group and a second lens group, the optical system has an effective focal length of F, the partially transmissive partially reflective element has a radius of curvature of R1, the second phase retarder has a radius of curvature of R2,
13. a short-range optical system as claimed in claim 1, wherein the at least two lens groups include a first lens group and a second lens group, the optical system has an effective focal length of F, the first phase retarder has a radius of curvature of R3, the reflective polarizer has a radius of curvature of R4,
14. a short-distance optical system according to claim 1, wherein the at least two lens groups comprise a first lens group and a second lens group, the effective focal length of the optical system is F, the half field angle of the optical system is ω, the total length of the optical system is TTL,
15. a short-range optical system according to claim 1, wherein the lens group comprises a single lens or a multi-lens.
16. A short distance optical system according to claim 1, wherein the lens group is an aspherical lens, a fresnel lens or a combination of multiple lenses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921374216.9U CN210776034U (en) | 2019-08-22 | 2019-08-22 | Short-distance optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921374216.9U CN210776034U (en) | 2019-08-22 | 2019-08-22 | Short-distance optical system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210776034U true CN210776034U (en) | 2020-06-16 |
Family
ID=71063568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921374216.9U Active CN210776034U (en) | 2019-08-22 | 2019-08-22 | Short-distance optical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210776034U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110515208A (en) * | 2019-08-22 | 2019-11-29 | 双莹科技股份有限公司 | Short-range optical system |
| CN112731676A (en) * | 2021-01-04 | 2021-04-30 | 业成科技（成都）有限公司 | Optical system |
-
2019
- 2019-08-22 CN CN201921374216.9U patent/CN210776034U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110515208A (en) * | 2019-08-22 | 2019-11-29 | 双莹科技股份有限公司 | Short-range optical system |
| CN112731676A (en) * | 2021-01-04 | 2021-04-30 | 业成科技（成都）有限公司 | Optical system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9013793B2 (en) | Lightweight eyepiece for head mounted display | |
| US9279986B2 (en) | Collimating optical device and system | |
| EP2788809B1 (en) | Compact illumination module for head mounted display | |
| US8472119B1 (en) | Image waveguide having a bend | |
| US8786686B1 (en) | Head mounted display eyepiece with integrated depth sensing | |
| US9551880B2 (en) | Polarizing optical system | |
| KR100839574B1 (en) | Substrate-guided optical beam expander | |
| CN100538437C (en) | A kind of optical system of Helmet Mounted Display | |
| US9915823B1 (en) | Lightguide optical combiner for head wearable display | |
| JP2020527737A (en) | Compact near-eye display optics for augmented reality | |
| CN214751111U (en) | Ultra-short distance ocular lens system | |
| CN107065181B (en) | Optical system of virtual reality equipment | |
| CN210776039U (en) | Miniaturized short-distance optical system | |
| CN210776034U (en) | Short-distance optical system | |
| TWM591624U (en) | Short distance optical system | |
| CN113391447A (en) | Optical system of miniature head-mounted display | |
| CN214252751U (en) | Near-to-eye display system | |
| CN211826725U (en) | Optical system of miniature head-mounted display | |
| TWM615839U (en) | Ultra short distance eyepiece system | |
| TWM587756U (en) | Miniaturized short-distance optical system | |
| TWI797563B (en) | Ultra short distance eyepiece system | |
| CN113341577B (en) | Binocular near-to-eye display equipment | |
| TWI711838B (en) | Short distance optical system | |
| CN110161690A (en) | The optical system of head-mounted display is miniaturized | |
| CN112505920A (en) | Miniaturized short-distance optical system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230506 Address after: Room 102, Building 1, No. 8 Shangsha Zhongnan Road, Chang'an Town, Dongguan City, Guangdong Province Patentee after: Dongguan Shuangying Optoelectronic Technology Co.,Ltd. Address before: taoyuan city Patentee before: SHUANGYING TECHNOLOGY Co.,Ltd. |