CN214586228U - Augmented reality optics - Google Patents
Augmented reality opticsDownload PDFInfo
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- CN214586228U CN214586228UCN202023096829.6UCN202023096829UCN214586228UCN 214586228 UCN214586228 UCN 214586228UCN 202023096829 UCN202023096829 UCN 202023096829UCN 214586228 UCN214586228 UCN 214586228U
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Abstract
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Description
Technical Field
The utility model relates to a AR technical field, more specifically relates to an augmented reality optical device.
Background
At present, an augmented reality technology refers to a technology for displaying real world things and virtual world information in a seamless connection mode to present an ultra-reality mode, and mainly overlaps physical feelings and feelings which are difficult to experience in a real life world through scientific technologies such as computers and integration, virtual information is applied to the real world and is perceived by human senses, and therefore the sense experience beyond reality is achieved.
Therefore, the augmented reality technology can not only display the information of the real world, but also display the virtual information at the same time, and the two kinds of information are mutually supplemented and superposed. For example, in visual augmented reality, a user may superimpose the real world with computer graphics using a device such as a helmet mounted display so that the user can see a combined real and virtual world.
However, in the existing augmented reality technology, the problems of poor imaging analysis, large distortion, relatively small angle of view and the like generally exist; in addition, the adoption of a large number of lenses for improving the imaging quality also causes the problems of large number of lenses, large volume, high relative cost and the like.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is to provide an augmented reality optical device to solve the problems of poor imaging quality, large distortion, small viewing angle, and large number of lenses, large volume, high cost, etc. caused by adopting a large number of lenses to improve the imaging quality in the current augmented reality technology.
The utility model provides an augmented reality optical device, which comprises a display image source, a lens group, a flat plate module and a concave semi-reflecting mirror which are arranged in sequence; the display image source is used for emitting a light beam signal, and the light beam signal is refracted to the flat plate module through the lens group; an acute included angle is formed between the arrangement direction of the flat plate module and the normal direction of the display image source, and the flat plate module is used for splitting and polarizing light beam signals refracted by the lens group; the concave semi-reflecting mirror is used for reflecting the light beam signals subjected to the light splitting and polarization treatment of the flat plate module to the imaging end for imaging.
Further, it is preferable that the lens group includes at least one convex lens and at least one concave lens; the focal length f1 of the convex lens satisfies: 20< f1< 50; the focal length f2 of the concave lens satisfies: -350< f2< -200.
Further, it is preferable that the abbe number of the convex lens satisfies: 1.5< n1< 1.8; the refractive index of the convex lens satisfies: 25< v1< 70; the abbe number of the concave lens satisfies: 1.55< n2< 1.8; the refractive index of the concave lens satisfies: 10< v2< 40; the abbe number of the flat plate module satisfies the following conditions: 1.5< n3< 1.8; the refractive index of the flat plate module satisfies: 35< v3< 70; the abbe number of the concave semi-reflecting mirror satisfies: 1.5< n4<1.8 refractive index of the concave half mirror: 35< v4< 70.
Further, it is preferable that the convex lens and/or the concave half mirror include any one of a spherical surface type, an aspherical surface type, and a free-form surface; and, when convex lens, concave half mirror are the aspheric type, the aspheric type satisfies:
wherein Z represents a distance in the optical axis direction of a point on the aspherical surface from the aspherical surface vertex; r represents the distance of a point on the aspheric surface to the corresponding optical axis; c represents the center curvature of the aspherical surface; k represents the conicity; a4, a6, a8, and a10 represent aspheric high-order term coefficients.
In addition, the flat module preferably includes a flat glass, and a polarizing plate, a polarization splitting plate, and a quarter wave plate sequentially attached to the flat glass.
Further, it is preferable that the central axis direction of the concave half mirror is perpendicular to the normal direction of the display image source.
In addition, the preferable structure is that a first acute angle included angle is formed between the central axis direction of the concave semi-reflecting mirror and the arrangement direction of the flat plate module, and a second acute angle included angle is formed between the arrangement direction of the flat plate module and the normal direction of the display image source; and the sum of the first acute included angle and the second acute included angle is equal to 90 °.
Further, it is preferable that the focal length f3 of the concave half mirror satisfies: 20< f3< 50.
Further, it is preferable that the normal direction of the display image source is perpendicular to the normal direction of the imaging end.
In addition, the preferred structure is that a semi-transparent semi-reflecting film is arranged on one side of the concave semi-reflecting mirror close to the flat plate module.
According to the above technical scheme, the utility model discloses an augmented reality optical device sets up battery of lens and dull and stereotyped module, and the two mutually supports and carries out refraction, beam split and polarization to the light beam signal that shows the image source and send and handles, not only can change the imaging direction of light beam, can also simplify optical device's complexity, does benefit to the miniaturized development of device, and the high, the applicable great angle of vision of imaging quality.
Drawings
Other objects and results of the invention will be more apparent and readily appreciated by reference to the following description taken in conjunction with the accompanying drawings, and as the invention is more fully understood. In the drawings:
fig. 1 is an overall device schematic diagram of an augmented reality optical device according to an embodiment of the present invention;
fig. 2 is a partial enlarged view of a security module according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a beam path of an augmented reality optical device according to an embodiment of the present invention;
fig. 4 is an OTF graph according to an embodiment of the present invention.
Wherein the reference numerals include: the display device comprises adisplay image source 1, afirst lens 2, asecond lens 3, a concave half-reflectingmirror 4, aflat module 5, a quarter-wave plate 51, apolarization splitting plate 52, a polarizingplate 53 andflat glass 54.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
For a detailed description of the enhanced display optical device of the present invention, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 shows an overall schematic structure of an augmented reality optical device according to an embodiment of the present invention.
As shown in fig. 1, the enhanced display optical device according to the embodiment of the present invention includes adisplay image source 1, a lens set, aflat module 5 and a concavesemi-reflecting mirror 4, which are sequentially disposed; thedisplay image source 1 is used for emitting a light beam signal, and the light beam signal is refracted to theflat plate module 5 through the lens group; acute included angles are formed between the arrangement direction of theflat plate module 5 and the normal direction of thedisplay image source 1 and between the arrangement direction of theflat plate module 5 and the normal direction of the concavesemi-reflecting mirror 4, and theflat plate module 5 is used for splitting and polarizing light beam signals refracted by the lens group; the concave surface half-reflectingmirror 4 is used for reflecting the light beam signal after being subjected to light splitting and polarization processing by theflat plate module 5 to an imaging end for imaging, and the adjustment of the imaging direction can be realized because theflat plate module 5 is arranged between the lens group and the concave surface half-reflectingmirror 4 and the light beam signal can be subjected to light splitting and polarization processing by theflat plate module 5, and the optical signal of thedisplay image source 1 side can be perfectly presented to the imaging end, so that the visual experience of a user is improved.
Wherein, the lens group includes at least one convex lens and at least one concave lens, in a specific example of the present invention, the lens group includes afirst lens 2 and asecond lens 3, thefirst lens 2 can adopt a convex lens, thesecond lens 3 adopts a concave lens; wherein, the focal length f1 of the convex lens satisfies: 20< f1< 50; the focal length f2 of the concave lens satisfies: -350< f2< -200. The lens group using two lenses can reduce the number of lenses of the display enhancement optical device, reduce the cost of the device and reduce the whole volume.
In order to effectively enhance the optical performance of the display optical device, in one embodiment of the present invention, the abbe number and the refractive index of each lens satisfy the following conditions: the abbe number of the convex lens satisfies: 1.5< n1< 1.8; the refractive index of the convex lens satisfies: 25< v1< 70; the abbe number of the concave lens satisfies: 1.55< n2< 1.8; the refractive index of the concave lens satisfies: 10< v2< 40; the abbe number of theflat plate module 5 satisfies: 1.5< n3< 1.8; the refractive index of theflat plate module 5 satisfies: 35< v3< 70; the abbe number of the concavesemi-reflecting mirror 4 satisfies: 1.5< n4<1.8 the refractive index of the concavehalf mirror 4 satisfies: 35< v4< 70.
In addition, the convex and/or concave lens and/orconcave half mirror 4 includes any one of a spherical surface type, an aspherical surface type, and a free-form surface; and, when the convex lens and/or the concave half mirror is an aspherical type, the aspherical type satisfies the following formula:
wherein Z represents a distance in the optical axis direction of a point on the aspherical surface from the aspherical surface vertex; r represents the distance of a point on the aspheric surface to the corresponding optical axis; c represents the center curvature of the aspherical surface; k represents the conicity; a4, a6, a8, and a10 represent aspheric high-order term coefficients.
It should be noted that theflat module 5 is obliquely disposed between the lens set and theconcave half mirror 4, the inclination angle and the polarization direction of theflat module 5 can be used to adjust the position of the image, the included angle between the normal of the imaging end and the normal of thedisplay image source 1 can also be adjusted, for example, the normal of thedisplay image source 1 and the normal of the imaging end can be set to be perpendicular, and theflat module 5 is obliquely disposed between thedisplay image source 1 and the imaging end by 45 °.
Specifically, fig. 2 shows the local enlarged structure of the sheet module according to the embodiment of the present invention, and fig. 3 shows the light beam path of the augmented reality optical device according to the embodiment of the present invention.
As shown in fig. 2 and 3, theflat panel module 5 includes aflat glass 54, a polarizingplate 53 attached to theflat glass 54, apolarization splitting plate 52 attached to the polarizingplate 53, and aquarter wave plate 51 attached to thepolarization splitting plate 52. The angle between the inclination angle of theflat panel module 5 and the normal of thedisplay image source 1 is 45 degrees, and the angle between the inclination angle of the flat panel module and the normal of the concavesemi-reflecting mirror 4 is 45 degrees.
Specifically, in the light transmission process, a natural light or light beam signal is firstly emitted by thedisplay image source 1, passes through thefirst lens 2 and thesecond lens 3, and is refracted onto theflat plate module 5; becauseflat module 5 includesflat module 5 and attached a plurality of retes on dull andstereotyped glass 54, therefore light beam or light pass throughpolarization beam splitter 52 earlier, polarize light with polarization conversion into the linear polarization throughpolarization beam splitter 52 to divide into two kinds of linear polarization of P and S, P polarized light transmission wherein, S polarized light reflection.
Then, the P-polarized light enters thepolarizer 53 after being transmitted, because the optical axis direction of the light transmitted by thepolarizer 53 is perpendicular to the polarization direction of the P-polarized light, the P-polarized light is cut off by thepolarizer 53, the S-polarized light reflected back passes through the quarter-wave plate 51 and is converted into circularly polarized light by linearly polarized light, and at the same time, the phase shifts by 45 degrees, the light passes through the quarter-wave plate 51 and reaches the concave half-mirror 4, because the inner side of the concave mirror is plated with a semi-transparent and semi-reflective film, 50% of the light is reflected back, passes through the quarter-wave plate 51 and is converted into linearly polarized light by the circularly polarized light, and at the same time, the phase shifts by 45 degrees, after twice processing by the quarter-wave plate 51, the direction of the optical axis of the polarized light rotates by 90 degrees, and is consistent with the direction of the optical axis of thepolarizer 53, the polarized light passes through thepolarization beam splitter 52 and thepolarizer 53 again, and finally, the whole optical path is completed, and entering an imaging end for imaging. Wherein the imaging end can be human eyes or other imaging devices.
In one embodiment of the invention, the central axis of theconcave half mirror 4 is perpendicular to the normal of thedisplay source 1. In addition, a first acute included angle is formed between the central axis direction of the concavesemi-reflecting mirror 4 and the arrangement direction of theflat plate module 5, and a second acute included angle is formed between the arrangement direction of theflat plate module 5 and the normal direction of thedisplay image source 1; and the sum of the first acute included angle and the second acute included angle is equal to 90 °.
It should be understood that the tilt angle of theflat panel module 5 is not limited to the specific angle shown in the drawings, and the tilt angle and the specific polarization direction of theflat panel module 5 can be adjusted according to the specific use scene.
In addition, for improving the optical performance among the light ray treatment, in the utility model discloses an among the reinforcing display optical device, the focus f3 of concave surfacehalf reflection mirror 4 satisfies: 20< f3< 50. Simultaneously, can be provided with half-transparent half-reflecting membrane in concave surface half-reflectingmirror 4 near one side of dull andstereotyped module 5 for light can have 50% accessible concave surface half-reflectingmirror 4 to reflect to dull andstereotyped module 5 on, this concave surface half-reflectingmirror 4 also can set up to other kinds of lenses, for example can make light pass through or return lenses such as whole.
Fig. 4 shows OTF curves of an enhanced display optical device according to an embodiment of the present invention.
As shown in fig. 4, the horizontal axis represents the spatial frequency (unit, line/millimeter), and the vertical axis represents the OTF value, so that the enhanced display optical device of the present invention can achieve the OTF value of 0.5 or more when the spatial frequency is about 60, and the imaging resolution is high and the imaging effect is good.
It can be seen from the above embodiments that, the augmented reality optical device provided by the present invention refracts, splits and polarizes the light beam signal emitted from the display image source through the mutual cooperation of the lens group and the flat module, not only can change the imaging direction of the light beam, but also can simplify the complexity of the optical device, and has high imaging quality and can be applied to a larger field angle; in addition, aberration correction can be carried out through two lenses to satisfy the formation quality requirement of high resolution, low distortion, very big reduction the cost and the volume weight of reinforcing display optical module.
A real optical device according to the present invention is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the actual optical device proposed by the present invention without departing from the scope of the invention. Therefore, the scope of the present invention should be determined by the content of the appended claims.
Claims (10)
1. An augmented reality optical device is characterized by comprising a display image source, a lens group, a flat plate module and a concave semi-reflecting mirror which are sequentially arranged; wherein,
the display image source is used for emitting a light beam signal, and the light beam signal is refracted to the flat plate module through the lens group;
an acute included angle is formed between the arrangement direction of the flat plate module and the normal direction of the display image source, and the flat plate module is used for splitting and polarizing the light beam signals refracted by the lens group;
the concave semi-reflecting mirror is used for reflecting the light beam signals subjected to the light splitting and polarization treatment of the flat plate module to an imaging end for imaging.
2. Augmented reality optical device according to claim 1,
the lens group comprises at least one convex lens and at least one concave lens;
the focal length f1 of the convex lens satisfies: 20< f1< 50;
the focal length f2 of the concave lens satisfies: -350< f2< -200.
3. Augmented reality optical apparatus according to claim 2,
the abbe number of the convex lens satisfies: 1.5< n1< 1.8;
the refractive index of the convex lens satisfies: 25< v1< 70;
the abbe number of the concave lens satisfies: 1.55< n2< 1.8;
the refractive index of the concave lens satisfies: 10< v2< 40;
the abbe number of the flat plate module satisfies the following conditions: 1.5< n3< 1.8;
the refractive index of the flat plate module satisfies: 35< v3< 70;
the abbe number of the concave semi-reflecting mirror satisfies the following conditions: 1.5< n4<1.8
The refractive index of the concave semi-reflecting mirror satisfies the following conditions: 35< v4< 70.
4. Augmented reality optical apparatus according to claim 2,
the convex lens and/or the concave semi-reflecting mirror comprise any one of a spherical surface type, an aspherical surface type and a free-form surface; and,
when the convex lens, the concave lens and the concave semi-reflecting mirror are aspheric, the aspheric satisfies the following conditions:
wherein Z represents a distance in the optical axis direction of a point on the aspherical surface from an aspherical surface vertex; r represents the distance of a point on the aspheric surface to the corresponding optical axis; c represents the central curvature of the aspheric surface; k represents the conicity; a4, a6, a8, a10 represent the aspherical high-order term coefficients.
5. Augmented reality optical device according to claim 1,
the flat plate module comprises flat glass, and a polaroid, a polarization beam splitter and a quarter wave plate which are sequentially attached to the flat glass.
6. Augmented reality optical device according to claim 1,
the central axis direction of the concave semi-reflecting mirror is vertical to the normal direction of the display image source.
7. Augmented reality optical device according to claim 1,
a first acute included angle is formed between the central axis direction of the concave semi-reflecting mirror and the arrangement direction of the flat plate module, and a second acute included angle is formed between the arrangement direction of the flat plate module and the normal direction of the display image source; and,
the sum of the first acute included angle and the second acute included angle is equal to 90 °.
8. Augmented reality optical device according to claim 1,
the focal length f3 of the concave semi-reflecting mirror satisfies: 20< f3< 50.
9. Augmented reality optical device according to claim 1,
the normal direction of the display image source is vertical to the normal direction of the imaging end.
10. Augmented reality optical device according to claim 1,
and a semi-transparent semi-reflective film is arranged on one side of the concave semi-reflective mirror close to the flat plate module.
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| CN202023096829.6UCN214586228U (en) | 2020-12-21 | 2020-12-21 | Augmented reality optics |
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| CN202023096829.6UCN214586228U (en) | 2020-12-21 | 2020-12-21 | Augmented reality optics |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118151404A (en)* | 2024-05-10 | 2024-06-07 | 成都工业学院 | A three-dimensional transparent display device |
| US12295242B2 (en) | 2022-06-20 | 2025-05-06 | Samsung Display Co., Ltd. | Display device and method of controlling the same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12295242B2 (en) | 2022-06-20 | 2025-05-06 | Samsung Display Co., Ltd. | Display device and method of controlling the same |
| CN118151404A (en)* | 2024-05-10 | 2024-06-07 | 成都工业学院 | A three-dimensional transparent display device |
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