CN112230435A - Optical system and wearable device - Google Patents
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- CN112230435A CN112230435A CN202011306668.0A CN202011306668A CN112230435A CN 112230435 A CN112230435 A CN 112230435A CN 202011306668 A CN202011306668 A CN 202011306668A CN 112230435 A CN112230435 A CN 112230435A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 95
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
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- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/30—Collimators
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/003—Lens or lenticular sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—Reflecting element, sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B2027/0178—Eyeglass type
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Abstract
The application discloses optical system and wearable equipment, optical system includes: a light source; the compensating lens group is arranged on a light transmission path of the light source, an incident surface of the compensating lens group is opposite to an emergent surface of the light source, and the compensating lens group performs first light path adjustment on light emitted by the light source; the waveguide is provided with a target incident surface, a first light guide part and a target emergent surface, the target incident surface is opposite to the emergent surface of the compensating lens group, and the first light guide part is positioned between the target incident surface and the target emergent surface; and the reflecting surface of the reflecting unit is opposite to the target emergent surface, and the reflecting unit performs second optical path adjustment on the light rays which are subjected to the first optical path adjustment so as to reflect parallel light. This optical system is through carrying out twice light path adjustment to light, can effectively guarantee light transmission's integrality, reduces light loss, guarantees the formation of image picture quality, improves people's eye and watches experience effect.
Description
Technical Field
The application belongs to the technical field of augmented reality glasses optics, and particularly relates to an optical system and wearable equipment with the same.
Background
In the related art, the light is dispersed after being transmitted through the waveguide. In the AR field, light is leading-in from the one end of waveguide through collimating lens, derives from the other end of waveguide, because the dispersion takes place among the light transmission process, and the part of the light that people's eye derived from the waveguide is difficult to see complete light, causes the virtual image to have the disappearance. At present, the problem is solved by increasing the aperture of the collimating lens, but the overall size and the appearance design of the product are affected by the increase of the aperture of the collimating lens.
In addition, if the light transmission path is adjusted by using the corner reflector, the corner reflector has a corner structure, so that the corner part scatters light in the light transmission process, resulting in a decrease in image quality.
Disclosure of Invention
The present application aims to provide an optical system and a wearable device, which at least solve one of the problems that the human eye is difficult to see the complete virtual image derived from the waveguide and the image quality is difficult to control.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides an optical system, including: a light source; the compensating mirror group is arranged on a light transmission path of the light source, an incident surface of the compensating mirror group is opposite to an emergent surface of the light source, and the compensating mirror group performs first light path adjustment on light emitted by the light source; the waveguide is provided with a target incident surface, a first light guide part and a target emergent surface, the target incident surface is opposite to the emergent surface of the compensating lens group, and the first light guide part is positioned between the target incident surface and the target emergent surface; the reflecting surface of the reflecting unit is opposite to the target emergent surface, and the reflecting unit performs second optical path adjustment on the light rays subjected to the first optical path adjustment so as to reflect parallel light; the light emitted by the light source is transmitted to the compensating mirror group, is emitted from the emergent surface of the compensating mirror group after the light path of the light is adjusted by the compensating mirror group, is transmitted into the waveguide from the target incident surface, and is emitted from the target emergent surface, the light emitted from the target emergent surface is reflected into parallel light by the reflecting unit and is transmitted to the first light guide part, and the light reflected by the reflecting unit is guided out of the waveguide by the first light guide part.
In a second aspect, an embodiment of the present application provides a wearable device including the optical system in the foregoing embodiment.
In the embodiment of this application, set up compensation mirror group through the target incident plane at the waveguide, set up the reflecting unit at the target exit plane of waveguide, after the light that the light source sent carries out first light path adjustment through compensation mirror group, through the waveguide transmission, derive from the target exit plane of waveguide, light carries out second light path adjustment through the reflecting unit after, the light that reflects out is the parallel light, the parallel light is through the reflection of first light guide part, the people's eye is followed the position of deriving of first light guide part and is watched, can see complete high-quality virtual image. This optical system is through carrying out twice light path adjustment to light, can effectively guarantee light transmission's integrality, reduces light loss, guarantees the formation of image picture quality, improves people's eye and watches experience effect.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of an optical system of the prior art;
FIG. 2 is a schematic diagram of another prior art optical system;
FIG. 3 is a schematic diagram of an optical system according to one embodiment of the present application;
FIG. 4 is a schematic view of another angle of the optical system shown in FIG. 3;
FIG. 5 is a schematic diagram of light transmission of an optical system according to an embodiment of the present application;
FIG. 6 is a schematic diagram of an optical system according to another embodiment of the present application.
Reference numerals:
an optical system 100; a human eye 200;
a light source 10;
a collimating unit 20; a collimating unit 21; a lens unit 22;
a waveguide 30; a target incident surface 31; a target exit surface 32;
a reflection unit 40;
a first light guide portion 50;
the second light guide portion 60;
the third light guide part 70.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present application is an invention created by the inventors based on the following facts.
At present, light projected by a projection device can be transmitted through a waveguide and then guided into human eyes, so that the human eyes can see a virtual image projected by the projection device. However, as shown in fig. 1, the light is guided into the waveguide b from the introduction portion of the waveguide b after passing through the collimator lens a, is transmitted in the waveguide b, and is guided out from the guide-out portion c at the other end, and the human eye sees a virtual image at a guide-out position corresponding to the guide-out portion c. However, if the aperture of the collimating lens a is smaller, the light rays at the edge viewing angles are separated at the light ray leading-out positions and cannot be seen by human eyes at the same time, so that the human eyes see an incomplete virtual image.
In order to overcome this problem, the aperture of the collimator lens a is generally increased (as shown in fig. 2), so that the light rays passing through two side positions of the collimator lens approach to the middle during transmission to the other end of the waveguide b, the light rays can be finally guided out from the middle position of the guide-out portion c, and the human eye can see the full virtual image at the middle position corresponding to the guide-out portion c. However, this solution can result in a large collimator lens, which makes the overall size of the product difficult to control and affects the aesthetic appearance of the product.
In addition, some solutions have a corner reflector disposed at one end of the waveguide, and the corner reflector can reflect the light transmitted by the waveguide, thereby adjusting the light transmission path. However, corner reflectors usually have corner structures, which are usually inactive areas in the light reflection process, and the inactive areas cannot perform effective light path adjustment, but also scatter light in the light transmission process, resulting in reduced image quality and affecting the viewing effect of human eyes.
Based on this, the inventors of the present application have innovatively derived the optical system 100 and the AR apparatus of the present application through long-term research and experiments.
An optical system 100 according to an embodiment of the invention is described below in conjunction with fig. 3-5.
As shown in fig. 3, an optical system 100 according to some embodiments of the present invention includes: a light source 10, a compensating mirror group 20, a waveguide 30 and a reflecting unit 40.
Specifically, the compensating lens group 20 is disposed on the light transmission path of the light source 10, the incident surface of the compensating lens group 20 is opposite to the emergent surface of the light source 10, and the compensating lens group 20 performs a first optical path adjustment on the light emitted from the light source 10. The waveguide 30 is provided with a target incident surface 31, a first light guide part 50 and a target exit surface 32, the target incident surface 31 is opposite to the exit surface of the compensating mirror group 20, and the first light guide part 50 is located between the target incident surface 31 and the target exit surface 32. The reflecting surface of the reflecting unit 40 is opposite to the target exit surface 32, and the reflecting unit 40 performs a second optical path adjustment on the light adjusted by the first optical path to reflect parallel light. The light emitted from the light source 10 is transmitted to the compensating mirror group 20, the light path of the light is adjusted by the compensating mirror group 20, the light is emitted from the exit surface of the compensating mirror group 20, and is transmitted into the waveguide 30 from the target entrance surface 31, and is emitted from the target exit surface 32, the light emitted from the target exit surface 32 is reflected by the reflecting unit 40 into parallel light and is transmitted to the first light guiding portion 50, and the light reflected by the reflecting unit 40 is guided out of the waveguide 30 by the first light guiding portion 50.
In other words, the optical system 100 according to the embodiment of the present application mainly includes a light source 10 capable of emitting imaging light, a compensating mirror group 20 for performing a first optical path adjustment on the light emitted from the light source 10, a waveguide 30 for transmitting the light subjected to the first optical path adjustment, and a reflecting unit 40 for performing a second optical path adjustment on the light guided out from the waveguide 30 and reflecting the light subjected to the second optical path adjustment back to the waveguide 30. The light source 10 may be a projection device capable of performing projection, light emitted by the light source 10 is guided into the waveguide 30 from the target incident surface 31 of the waveguide 30 after being subjected to first optical path adjustment by the compensating mirror group 20, is transmitted to the target exit surface 32 of the waveguide 30, and is emitted to the reflecting unit 40 from the target exit surface 32, the reflecting unit 40 performs second optical path adjustment on the light emitted by the waveguide 30, so that the light reflected back to the waveguide 30 from the reflecting unit 40 is parallel light, the parallel light is transmitted to the first light guide portion 50 in the waveguide 30, and is finally reflected by the first light guide portion 50 and then is led out from a first side (for example, the upper surface in fig. 3) of the waveguide 30.
The human eye 200 can view the light guided out through the first light guide portion 50 from the first side of the waveguide 30, because the light is adjusted by the first optical path through the compensating lens set 20 before entering the waveguide 30, and is adjusted by the second optical path through the reflecting unit 40 when passing through the reflecting unit 40, the light reflected from the reflecting unit 40 to the first light guide portion 50 can be parallel light through mutual compensation of the two optical path adjustments, so that the light finally guided out from the first light guide portion 50 is substantially consistent with the light ray image emitted from the light source 10, and the human eye 200 can view the complete virtual image projected by the light source 10 at the guiding position of the first light guide portion 50.
It should be noted that, the first optical path adjustment and the second optical path adjustment referred to in this application refer to adjusting a transmission path of light, so that the light is transmitted under a set optical path, and a final image meets a viewing requirement. The first optical path adjustment and the second optical path adjustment do not limit the number of times of adjusting the light transmission path, that is, the adjustment of the light transmission path may be performed only once or may be performed multiple times regardless of the first optical path adjustment or the second optical path adjustment.
Therefore, according to the optical system 100 of the embodiment of the present application, the compensating mirror group 20 is disposed on the target incident surface 31 of the waveguide 30, the reflecting unit 40 is disposed on the target emergent surface 32 of the waveguide 30, after the light emitted by the light source 10 is subjected to the first optical path adjustment by the compensating mirror group 20, the light is transmitted through the waveguide 30, and is guided out from the target emergent surface 32 of the waveguide 30, after the light is subjected to the second optical path adjustment by the reflecting unit 40, the reflected light is parallel light, the parallel light is reflected by the first light guide part 50, and the human eyes can see the guided position of the first light guide part 50, so that the complete and high-quality virtual image can be seen. This optical system 100 can effectively guarantee light transmission's integrality through carrying out twice light path adjustment to light, reduces light loss, guarantees the formation of image picture quality, improves people's eye and watches experience effect.
According to an embodiment of the application, the first optical path is adjusted to converge the light and the second optical path is adjusted to diverge the light, or the first optical path is adjusted to diverge the light and the second optical path is adjusted to converge the light.
Optionally, the parameters of the compensating mirror group 20 are matched with the parameters of the reflection unit 40.
That is, as shown in fig. 4 and 5, the compensating mirror group 20 may be a lens module for converging light transmitted by the light source 10, in which case, the first optical path adjustment performed by the compensating mirror group 20 may be to converge light, that is, light emitted by the light source 10 is converged after passing through the compensating mirror group 20, and the converged light enters the waveguide 30 from the target incident surface 31 of the waveguide 30, is transmitted in the waveguide 30, and is emitted to the reflecting unit 40 from the target exit surface 32. Correspondingly, the reflection unit 40 is a lens module capable of diverging the converged light, and after the converged light is adjusted on the second light path of the reflection unit 40, the converged light is originally diverged, so that the light reflected by the reflection unit 40 is parallel light.
The compensating lens group 20 may also be a lens module for diverging the light transmitted by the light source 10, in which case the first optical path adjustment performed by the compensating lens group 20 is to diverge the light, that is, the light emitted by the light source 10 diverges after passing through the compensating lens group 20, enters the waveguide 30 from the target incident surface 31 of the waveguide 30, is transmitted in the waveguide 30, and is emitted from the target exit surface 32 to the reflecting unit 40. Correspondingly, the reflection unit 40 is a lens module capable of converging the divergent light, and after the divergent light is adjusted on the reflection unit 40 by the second light path, the divergent light is converged originally, so that the light reflected by the reflection unit 40 is parallel light.
Therefore, through the mutual matching of the first light path adjustment and the second light path adjustment, the light emitted from the light source 10 can be reflected to human eyes from the first light guide part 50 in the form of parallel light after being subjected to the light path adjustment twice, the scattering of the light in the transmission process can be effectively reduced, and the integrity of the light transmission is effectively ensured.
Optionally, in some embodiments of the present application, the compensating mirror group 20 includes: a collimating unit 21 and a lens unit 22.
Specifically, as shown in fig. 3, the collimating unit 21 collimates the light emitted from the light source 10, the lens unit 22 is disposed between the collimating unit 21 and the waveguide 30, and the lens unit 22 performs a first optical path adjustment on the collimated light.
That is, the compensating mirror group 20 is mainly composed of two parts, i.e. a collimating unit 21 and a lens unit 22, wherein the collimating unit 21 can collimate the light emitted from the light source 10, so as to control the transmission path of the light entering the lens unit 22. The lens unit 22 may perform an optical path adjustment on the collimated light rays so that the light rays are diverged or converged.
In addition, due to the matching of the compensating mirror group 20 and the reflecting unit 40, the projection structure formed by the light source 10 and the compensating mirror group 20 does not need to be designed to be large, and the volume of the whole product can be reduced.
In some embodiments of the present application, the lens unit 22 is a cylindrical mirror, and the reflection unit 40 is a cylindrical mirror. The cylindrical mirror adopts a smooth and continuous surface type, so that the adjustment of a light path can be realized, the scattering and the loss of light rays can be reduced, and the original direction return of the light rays can be realized while the adjustment of the light path is realized by adopting the smooth and continuous surface type, so that the imaging effect is further ensured.
Alternatively, the lens cell 22 and the cylindrical mirror are spherical mirrors or aspherical mirrors. Therefore, through the design of the spherical mirror or the aspherical mirror, the optical system 100 can be reasonably adjusted according to the actual structure requirement of a product, and the application range is enlarged while the imaging effect is ensured.
According to some alternative embodiments of the present application, the light-exiting surface of the lens unit 22 has the same focal length or curvature as the reflecting surface of the cylindrical mirror. Therefore, the adjustment ranges of the first optical path adjustment and the second optical path adjustment correspond to each other, the compensation effect of the two optical path adjustments is ensured, and the reflecting unit 40 can reflect the parallel light meeting the requirement.
Optionally, the thickness of the cylindrical mirror is greater than the thickness of the waveguide 30.
Specifically, as shown in fig. 3, the thickness of the cylindrical reflector in the vertical direction is greater than the thickness of the waveguide 30 in the vertical direction, so that it is ensured that all the light rays emitted from the target exit surface 32 of the waveguide 30 to the waveguide 30 can be reflected by the cylindrical reflector, thereby further reducing the loss of the light rays and improving the imaging image quality.
It should be noted that the structure and principle of the optical parameters of the lens module set for adjusting the first optical path and the second optical path to make the light reflected by the reflection unit 40 be parallel light are understood and easily implemented by those skilled in the art, and therefore will not be described in detail.
In some alternative embodiments of the present application, the collimating unit 21 is integrally formed with the lens unit 22. Therefore, the compensating mirror group 20 is arranged into an integral structure, the structural relation between the collimating unit 21 and the lens unit 22 can be reasonably designed on the basis of ensuring the light adjusting effect, the forming is convenient, and the structural stability is high.
Optionally, according to an embodiment of the present application, the light source 10 is disposed on a first side of the waveguide 30, the target incident surface 31 is disposed on the first side of the waveguide 30, the optical system 100 further includes a second light guiding portion 60, the second light guiding portion 60 is disposed in the waveguide 30, a light guiding surface of the second light guiding portion 60 faces an exit surface of the light source 10, light emitted by the light source 10 is adjusted by the compensating lens group 20 through a first optical path, and then is reflected to a second end of the waveguide 30 through the second light guiding portion 60, wherein a side surface of the first side of the waveguide 30 and an end surface of the second end of the waveguide 30 are adjacent surfaces.
Specifically, as shown in fig. 3, the light source 10 is disposed above the waveguide 30, the target incident surface 31 is located on the upper surface of the waveguide 30, and the compensating mirror group 20 is disposed between the light source 10 and the target incident surface 31. The left end of the waveguide 30 is provided with a second light guiding portion 60, a light guiding surface of the second light guiding portion 60 faces the light exiting surface of the light source 10, and light emitted from the light source 10 is incident into the waveguide 30 from the target incident surface 31 after being subjected to the first optical path adjustment by the compensating lens group 20.
The right end face of the waveguide 30 is a target exit face 32, the reflecting unit 40 is provided at the right end of the waveguide 30, and the reflecting face of the reflecting unit 40 is disposed opposite to the target exit face 32. The light adjusted by the first light path is transmitted from left to right in the waveguide 30, and is emitted to the reflection unit 40 from the target exit surface 32, and the reflection unit 40 performs the second light path adjustment on the light, and reflects the light adjusted by the second light path to the first light guide part 50 in the waveguide 30, and then the light is reflected to the position of the human eye 200 by the first light guide part 50.
Therefore, the arrangement structure of the light source 10 and the compensating mirror group 20 is more reasonable by the second light guiding part 60.
In some embodiments of the present application, the optical system 100 further comprises: a third light guide part 70, the third light guide part 70 being provided in the waveguide 30, a light guide surface of the third light guide part 70 facing the reflection surface of the reflection unit 40, the target emission surface 32 being provided on the first side or the second side of the waveguide 30,
after the light emitted from the light source 10 is adjusted by the compensating mirror group 20 through the first optical path, the light is transmitted from the target incident surface 31 to the waveguide 30, transmitted through the third light guide part 70 and emitted from the target exit surface 32, the light emitted from the target exit surface 32 is transmitted to the third light guide part 70 by the reflection unit 40, and then transmitted to the first light guide part 60 by the third light guide part 70, the light reflected by the third light guide part 70 is guided out of the waveguide 30 by the first light guide part 60, and the second side is opposite to the first side.
As shown in fig. 6, in contrast to the above-described embodiment, in the present embodiment, a third light guide unit 70 is further provided between the right end of the waveguide 30 and the first light guide unit 50, the third light guide unit 70 may have a single-sided reflection structure, the target emission surface 32 is provided on the lower surface of the waveguide 30, the left side surface of the third light guide unit 70 may guide out the light transmitted to the right end of the waveguide 30 through the second light guide unit 60 from the lower surface of the waveguide 30, the reflection unit 40 may be provided on the lower surface of the right end of the waveguide 30 in a corresponding manner, the reflection unit 40 reflects the light reflected by the third light guide unit 70 back to the third light guide unit 70, reflects the light to the first light guide unit 50 through the third light guide unit 70, and finally guides out from the upper surface of the waveguide 30 through reflection on the right side surface of the first light guide unit 50, and the human eye 200 may view a complete virtual image projected by the light source 10 from the.
Therefore, by providing the third light guide part 70 in the waveguide 30, the structure of the optical system 100 is more diversified, the transmission path of the light can be reasonably adjusted according to actual use requirements, and the transmission integrity of the light can be ensured.
According to an embodiment of the application, the optical system 100 further comprises: a polarizing unit (not shown in the figure) provided between the target exit surface 32 of the waveguide 30 and the reflecting unit 40.
Specifically, the mounting position of the polarization unit may be changed according to the mounting position of the reflection unit 40, and the light reflected from the reflection unit 40 back to the waveguide 30 may be changed into a desired polarized light by adding the polarization unit.
According to the wearable device of the embodiment of the application, including the optical system 100 according to the above-mentioned embodiment of the application, because the optical system 100 according to the above-mentioned embodiment of the application has the above-mentioned technical effect, therefore, the wearable device according to the embodiment of the application also has the corresponding technical effect, that is, on the basis of reasonably controlling the product size, the light loss of the projection device in the light transmission process is reduced, and the viewing experience effect of human eyes is improved.
Wherein, wearable equipment can be AR glasses, waveguide 30 can be the lens of AR glasses, light source 10 can be the projection equipment on locating one mirror leg of AR glasses, reflection unit 40 then can locate the position that the glasses middle part is close to the bridge of the nose, the light that light source 10 sent is close to the one end of this light source 10 from a lens, transmit to the other end that this lens is close to the bridge of the nose, after reflection unit 40 reflects, light returns the lens, and derive people's eye from the light derivation position on the lens, people's eye can watch the virtual image that light source 10 sent.
Other constructions of wearable devices according to embodiments of the invention, such as the mounting structure of the projection device and the waveguide, and the operation thereof, are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (11)
1. An optical system (100), comprising:
a light source (10);
the compensating mirror group (20) is arranged on a light transmission path of the light source (10), an incident surface of the compensating mirror group (20) is opposite to an emergent surface of the light source (10), and the compensating mirror group (20) performs first light path adjustment on light emitted by the light source (10);
the optical waveguide (30) is provided with a target incident surface (31), a first light guide part (50) and a target emergent surface (32), the target incident surface (31) is opposite to the emergent surface of the compensating mirror group (20), and the first light guide part (50) is positioned between the target incident surface (31) and the target emergent surface (32);
the reflecting surface of the reflecting unit (40) is opposite to the target emergent surface (32), and the reflecting unit (40) performs second optical path adjustment on the light rays subjected to the first optical path adjustment to reflect parallel light;
the light emitted by the light source (10) is transmitted to the compensating mirror group (20), is emitted from the exit surface of the compensating mirror group (20) after the optical path of the light is adjusted by the compensating mirror group (20), is transmitted into the waveguide (30) from the target entrance surface (31), and is emitted from the target exit surface (32), the light emitted from the target exit surface (32) is reflected into parallel light by the reflecting unit (40) and is transmitted to the first light guide part (50), and the light reflected by the reflecting unit (40) is guided out of the waveguide (30) by the first light guide part (50).
2. The optical system (100) of claim 1, wherein the first optical path is adapted to converge the light and the second optical path is adapted to diverge the light, or wherein the first optical path is adapted to diverge the light and the second optical path is adapted to converge the light.
3. The optical system (100) according to claim 1, wherein parameters of the compensating mirror group (20) are matched to parameters of the reflection unit (40).
4. The optical system (100) according to claim 1, wherein the compensating mirror group (20) comprises:
a collimating unit (21), the collimating unit (21) collimating light emitted by the light source (10);
a lens unit (22), the lens unit (22) being disposed between the collimating unit (21) and the waveguide (30), the lens unit (22) performing the first optical path adjustment on the collimated light.
5. The optical system (100) according to claim 4, wherein the lens unit (22) is a cylindrical mirror and the reflection unit (40) is a cylindrical mirror.
6. The optical system (100) of claim 5, wherein the thickness of the cylindrical mirror is greater than the thickness of the waveguide (30).
7. The optical system (100) according to claim 4, wherein the collimating unit (21) is integrally formed with the lens unit (22).
8. The optical system (100) of claim 1, wherein the light source (10) is disposed on a first side of the waveguide (30) and the target entrance face (31) is disposed on the first side of the waveguide (30), the optical system (100) further comprising:
a second light guide part (60), wherein the second light guide part (60) is disposed in the waveguide (30), a light guide surface of the second light guide part (60) faces a light exit surface of the light source (10), and light emitted by the light source (10) is reflected to a second end of the waveguide (30) through the second light guide part (60) after being subjected to the first optical path adjustment through the compensation lens group (20),
wherein the side surface of the first side of the waveguide (30) and the end surface of the second end of the waveguide (30) are adjacent surfaces.
9. The optical system (100) of claim 1, further comprising:
a third light guide unit (70), the third light guide unit (70) being provided in the waveguide (30), a light guide surface of the third light guide unit (70) facing a reflection surface of the reflection unit (40), the target emission surface (32) being provided on the first side or the second side of the waveguide (30),
after the light emitted by the light source (10) is subjected to the first optical path adjustment by the compensating mirror group (20), the light is transmitted from the target incident surface (31) into the waveguide (30), is transmitted by the third light guide part (70) and is emitted from the target exit surface (32), the reflecting unit (40) transmits the light emitted from the target exit surface (32) to the third light guide part (70), and then transmits the light to the first light guide part (60) by the third light guide part (70), the first light guide part (60) guides the light reflected by the third light guide part (70) out of the waveguide (30), and the second side is opposite to the first side.
10. The optical system (100) of claim 1, further comprising:
a polarizing unit disposed between the target exit surface (32) and the reflecting unit (40).
11. A wearable device, characterized in that it comprises an optical system (100) according to any of claims 1-10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011306668.0A CN112230435A (en) | 2020-11-19 | 2020-11-19 | Optical system and wearable device |
| PCT/CN2021/130333 WO2022105687A1 (en) | 2020-11-19 | 2021-11-12 | Optical system and wearable device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011306668.0A CN112230435A (en) | 2020-11-19 | 2020-11-19 | Optical system and wearable device |
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| Publication Number | Publication Date |
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| CN112230435A true CN112230435A (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011306668.0A Pending CN112230435A (en) | 2020-11-19 | 2020-11-19 | Optical system and wearable device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112230435A (en) |
| WO (1) | WO2022105687A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112987166A (en) * | 2021-03-23 | 2021-06-18 | 深圳珑璟光电科技有限公司 | Optical waveguide assembly and head-mounted display device |
| CN112987164A (en) * | 2021-03-23 | 2021-06-18 | 深圳珑璟光电科技有限公司 | Optical waveguide assembly and head-mounted display device |
| CN113093324A (en) * | 2021-04-12 | 2021-07-09 | 维沃移动通信有限公司 | Optical system and wearable device |
| CN113391393A (en) * | 2021-06-28 | 2021-09-14 | 维沃移动通信有限公司 | Optical system and wearable device |
| CN113433609A (en) * | 2021-05-21 | 2021-09-24 | 维沃移动通信有限公司 | Optical system and wearable device |
| WO2022105687A1 (en) * | 2020-11-19 | 2022-05-27 | 维沃移动通信有限公司 | Optical system and wearable device |
| WO2022105871A1 (en) * | 2020-11-19 | 2022-05-27 | 维沃移动通信有限公司 | Optical system and wearable device |
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| US8471967B2 (en) * | 2011-07-15 | 2013-06-25 | Google Inc. | Eyepiece for near-to-eye display with multi-reflectors |
| US9915823B1 (en) * | 2014-05-06 | 2018-03-13 | Google Llc | Lightguide optical combiner for head wearable display |
| GB2570302A (en) * | 2018-01-17 | 2019-07-24 | Wave Optics Ltd | Light projector |
| CN112230435A (en) * | 2020-11-19 | 2021-01-15 | 维沃移动通信有限公司 | Optical system and wearable device |
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2020
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- 2021-11-12 WO PCT/CN2021/130333 patent/WO2022105687A1/en active Application Filing
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| CN108474542A (en) * | 2016-01-15 | 2018-08-31 | 斯特拉斯堡大学 | Improved light guide and optical system |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022105687A1 (en) * | 2020-11-19 | 2022-05-27 | 维沃移动通信有限公司 | Optical system and wearable device |
| WO2022105871A1 (en) * | 2020-11-19 | 2022-05-27 | 维沃移动通信有限公司 | Optical system and wearable device |
| CN112987166A (en) * | 2021-03-23 | 2021-06-18 | 深圳珑璟光电科技有限公司 | Optical waveguide assembly and head-mounted display device |
| CN112987164A (en) * | 2021-03-23 | 2021-06-18 | 深圳珑璟光电科技有限公司 | Optical waveguide assembly and head-mounted display device |
| CN112987164B (en) * | 2021-03-23 | 2022-08-02 | 深圳珑璟光电科技有限公司 | Optical waveguide assembly and head-mounted display device |
| CN113093324A (en) * | 2021-04-12 | 2021-07-09 | 维沃移动通信有限公司 | Optical system and wearable device |
| WO2022218228A1 (en) * | 2021-04-12 | 2022-10-20 | 维沃移动通信有限公司 | Optical system and wearable device |
| CN113433609A (en) * | 2021-05-21 | 2021-09-24 | 维沃移动通信有限公司 | Optical system and wearable device |
| CN113433609B (en) * | 2021-05-21 | 2022-09-30 | 维沃移动通信有限公司 | Optical system and wearable device |
| CN113391393A (en) * | 2021-06-28 | 2021-09-14 | 维沃移动通信有限公司 | Optical system and wearable device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022105687A1 (en) | 2022-05-27 |
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