CN113093324B - Optical system and wearable equipment - Google Patents
Optical system and wearable equipment Download PDFInfo
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- CN113093324B CN113093324B CN202110392114.5A CN202110392114A CN113093324B CN 113093324 B CN113093324 B CN 113093324B CN 202110392114 A CN202110392114 A CN 202110392114A CN 113093324 B CN113093324 B CN 113093324B
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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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
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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
- G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
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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
- 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
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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Abstract
The application discloses optical system and wearable equipment, optical system includes: a light source; the collimation unit is arranged on a transmission path of the light source, and the light source is positioned on one side of an optical axis of the collimation unit; the light source is arranged on the light guide surface of the waveguide, and the light emitted by the light source is collimated by the collimating unit, transmitted into the waveguide from the first end of the waveguide and reflected by the light guide surface to be emitted out of the target emergent surface; and a reflection unit, wherein a reflection surface of the reflection unit is opposite to the target exit surface, the light emitted from the target exit surface is reflected to the second light guide part through the reflection surface, and the second light guide part guides the light reflected by the reflection unit out of the waveguide. This application can avoid light off-axis scheduling problem through the angle of the position of adjustment light source and leaded light face to guarantee the formation of image picture quality, improve people's eye and watch 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 field of AR technology, light emitted by a light source is guided in from one end of a waveguide through a collimating lens and guided out from the other end of the waveguide, and finally enters human eyes to present a picture.
However, in the existing related art, the volume of a projection module consisting of a screen and a collimating lens is large, the reflector is arranged at the other end of a waveguide, so that the volume of the projection module can be reduced to a certain extent, but light rays emitted by a light source are optically off-axis relative to the reflector after being transmitted through the waveguide, so that the quality of final imaging images is difficult to optimize, large astigmatism exists, and meanwhile, distortion is asymmetric and difficult to correct.
Disclosure of Invention
The application aims at providing an optical system and a wearable device, and at least one of the problems of light ray off-axis and unclear image quality is solved.
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 collimating unit is arranged on a transmission path of the light source, and the light source is positioned on one side of an optical axis of the collimating unit; the light source is arranged in the light guide groove, the light guide surface of the light guide part faces the light emergent surface of the light source, and the light emitted by the light source is collimated by the collimating unit, transmitted into the waveguide from the first end of the waveguide and reflected by the light guide surface and then emitted out of the target emergent surface; a reflecting unit having a reflecting surface facing the target exit surface, the light emitted from the target exit surface being reflected by the reflecting surface to the second light guide portion, and the second light guide portion guiding the light reflected by the reflecting unit out of the waveguide; wherein, pass through at light the optical axis transmits to under the condition of waveguide, light process follow after the leaded light face reflection the target exit surface jets out, and transmits to the plane of reflection, light and target tangent plane have the angle of predetermineeing, the target tangent plane is light throws the tangent plane of point on the reflection unit.
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 the application, the light source is biased to one side of the optical axis of the collimation unit, and the first light guide part, the second light guide part and the reflection unit are simultaneously matched, so that the light rays which are emitted out of the waveguide after passing through the first light guide part, the second light guide part and the reflection unit cannot be off-axis or the off-axis range is controllable, the off-axis problem when the light rays emitted by the light source reach eyes is avoided, the image quality of optical imaging is better optimized, and the distortion symmetry is effectively corrected.
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 an optical system according to one embodiment of the present application;
FIG. 3 is a schematic diagram of an optical system according to yet another embodiment of the present application;
FIG. 4 is a schematic diagram of an optical system according to yet another embodiment of the present application;
FIG. 5 is a schematic diagram of an optical system according to yet another embodiment of the present application.
Reference numerals:
an optical system 100;
a light source 10;
a collimating unit 20;
a waveguide 30; first light guide portion 31; second light directing portions 32; a target exit surface 33;
a reflection unit 40; a reflection surface 41;
a cylindrical mirror 50;
a human eye 200;
a screen 1; and a collimator lens 2.
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 addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the 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, for projection equipment, the image quality of an image can be improved by additionally arranging a cylindrical mirror and a cylindrical reflector, but because the angles of light rays entering a guide surface are different, the angles of the light rays reflected by the guide surface are also different, so that the off-axis phenomenon can occur, and the astigmatism is larger. As shown in fig. 1, the screen 1 is located right above the collimating lens 2, and the center of the screen 1 passes through the optical axis of the collimating lens, and the left end light source a and the right end light source b of the screen 1 are at the same distance from the center point M on the screen. However, after a series of radiation refractions, the distances from the a ' point and the b ' point to the central point M ' are changed when reaching the eye, namely, the problem of off-axis occurs. Therefore, the image quality seen by eyes is not clear, the whole picture is deformed, and the experience effect is finally influenced.
Based on this, the inventors of the present application have innovatively derived the optical system 100 and the wearable device of the present application through long-term research and experiments.
An optical system 100 according to an embodiment of the present invention is described below with reference to fig. 2 to 5.
As shown in fig. 2 through 5, an optical system 100 according to some embodiments of the present invention includes: a light source 10, a collimating unit 20, a waveguide 30 and a reflecting unit 40.
Specifically, the collimating unit 20 is disposed on the transmission path of the light source 10, the light source 10 is located on one side of the optical axis of the collimating unit 20, the waveguide 30 is provided with a first light guiding part 31, a second light guiding part 32 and a target emitting surface 33, the light guiding surface of the first light guiding part 31 faces the light emitting surface of the light source 10, the light emitted from the light source 10 is collimated by the collimating unit 20, transmitted into the waveguide 30 from the first end of the waveguide 30, reflected by the light guiding surface and emitted from the target emitting surface 33, the reflecting surface 41 of the reflecting unit 40 faces the target emitting surface 33, the light emitted from the target emitting surface 33 is reflected to the second light guiding part 32 by the reflecting surface 41, and the second light guiding part 32 guides the light reflected by the reflecting unit 40 out of the waveguide 30. In the case that the light is transmitted to the waveguide 30 through the optical axis, the light is reflected by the light guide surface, then emitted from the target exit surface 33, and transmitted to the reflection surface 41, the light and the target section have a predetermined angle, and the target section is a section tangent to a point where the light is projected on the reflection unit.
In other words, the optical system 100 according to the embodiment of the present application is mainly composed of the light source 10 that can emit imaging light, the collimating unit 20 that collimates the light emitted from the light source 10, the waveguide 30 that transmits the light whose collimation has been adjusted, and the reflecting unit 40 that reflects the light guided out from the waveguide 30 and reflects the light back to the waveguide 30.
The light source 10 may be a projection device capable of performing projection, and the light emitted by the light source 10 is light actually emitted by the projection device, while the light in the "case where the light is transmitted to the waveguide 30 through the optical axis" is not limited to the light emitted by the light source. Among the light rays emitted from the light source, the light ray in "in the case where the light ray is transmitted to the waveguide 30 through the optical axis" may be the light ray emitted from the light source if there is a light ray that can pass through the optical axis, and the light ray in "in the case where the light ray is transmitted to the waveguide 30 through the optical axis" may be the assumed light ray if there is no light ray that can pass through the optical axis. This definition is only used to define the positional and angular relationship between the light source, the collimating unit, the waveguide and the reflecting unit.
For convenience of description, the waveguide 30 is defined as extending left and right, and the assembly direction of the light source 10, the collimating unit 20, and the waveguide 30 is defined as being assembled in an up-down direction.
The first light guide unit 31 is provided inside the waveguide 30 at a position closer to the left side, and the light guide surface of the first light guide unit 31 is provided opposite to the light output surface of the light source 10. The light emitted from the light source 10 can enter the waveguide 30 from the left end of the waveguide 30 after being adjusted by the collimating unit 20, and can reach the light guide surface of the first light guide part 31, and the light continues to be transmitted inside the waveguide 30 until reaching the target exit surface 33 of the waveguide 30 under the action of refraction or reflection of the light guide surface.
The right side surface of the waveguide 30 is further provided with a reflection unit 40, the light can reach the reflection unit 40 through the target exit surface 33, and the target exit surface 33 of the waveguide 30 is disposed opposite to the reflection surface 41 of the reflection unit 40. Further, when the light reaches the reflecting means 40 through the target exit surface 33, the reflecting surface 41 of the reflecting means 40 can reflect the light back into the waveguide 30.
A second light guide portion 32 is further provided inside the waveguide 30 at a position closer to the right side. The light reflected by the reflection surface 41 of the reflection unit 40 can reach the second light guide part 32, the second light guide part 32 can reflect or refract the light out of the waveguide 30, and the light is further emitted from the waveguide 30 to reach the human eye 200, and the human eye 200 can view the light guided out through the second light guide part 32 from the first side of the waveguide 30.
It should be noted that the collimating unit 20 has an optical axis, where the optical axis refers to the principal axis of the collimating unit 20, and the light source 10 is located at one side of the optical axis. That is, the end points of the left or right ends of the light source 10 can be passed through by the extension line of the optical axis, or the end points of the left and right ends of the light source 10 are completely at one side of the extension line of the optical axis.
The light entering from the optical axis may be light emitted by the light source 10, i.e. when a part of the edge of the light source 10 passes through the extension of the optical axis, the part of the light may enter the waveguide 30 through the optical axis (as shown by the line Z in fig. 2); the light ray incident from the optical axis may be a hypothetical light ray, i.e., when the light source 10 is completely deviated from the optical axis, an extension line of the optical axis does not pass through the light source, in which case the hypothetical light ray is explained by taking the example that the hypothetical light ray passes through the optical axis (as shown by a dotted line Z in fig. 3). However, both actual light rays emitted from the light source 10 and assumed light rays may be transmitted to the reflection surface 41 of the reflection unit 40 through the light guide surface of the first light guide part 31 and then reflected to the second light guide part 32 through the reflection surface 41, the light rays may be emitted out of the waveguide 30 through the second light guide part 32, and the light rays emitted from the waveguide 30 may be kept parallel to the light rays emitted into the waveguide, thereby preventing the occurrence of the off-axis phenomenon.
In addition, the straight line on which the optical axis is located may be disposed in parallel with the reflecting surface 41 of the reflecting unit 40, or an extension line of the straight line on which the optical axis is located may have an included angle with the target tangent plane, where the included angle is a predetermined angle. That is, the light within the predetermined angle can also achieve the effect that the image reaching the eyes is clear.
Therefore, according to the optical system 100 of the embodiment of the present application, by biasing the light source 10 to one side of the optical axis of the collimating unit 20 and matching with the design of the first light guiding part 31, the second light guiding part 32 and the reflecting unit 40, the light rays exiting the waveguide 30 after passing through the first light guiding part 31, the second light guiding part 32 and the reflecting unit 40 will not appear off-axis or the off-axis range is controllable, so that the off-axis problem when the light rays emitted by the light source 10 reach the eyes is avoided, the image quality of the optical imaging is better optimized, and the distortion symmetry is effectively corrected.
According to an embodiment of the present application, the reflection unit 40 is a cylindrical surface mirror, and the cylindrical surface mirror adopts a smooth and continuous surface type, so that the original direction of light can be returned while the light path adjustment is realized, and the imaging effect is further ensured. The original angle of the light in the plane of the screen is returned through the cylindrical mirror combination, and the size of the projection optical machine is reduced. Moreover, the reflecting part has no abrupt edges and corners, so that the reflecting part is relatively smooth, and the image is prevented from generating texture.
According to some alternative embodiments of the present application, the point at which the light rays impinge on the reflection unit 40 is located at a middle position of the reflection surface 41. When the light reaches the reflecting surface 41, a light spot formed by the light on the reflecting surface 41 can be located at a central position on the reflecting surface 41. Thus, the light reflected from the reflecting surface 31 can exhibit a good image quality without causing a shape irregularity or a clear image quality.
According to one embodiment of the application, the preset angle is in the range of 75-90 °. Note that the preset angle includes an end point value.
Specifically, as shown in fig. 2 or 3, the reflection surface 41 of the reflection unit 40 is a plane extending in the vertical direction, and the optical axis Z may be a straight line not completely extending in the vertical direction, but may be inclined at a predetermined angle with respect to the vertical direction, the predetermined angle is such that the light incident from the optical axis is emitted at a predetermined angle with respect to the vertical direction after being reflected by the first light guide part 31, the reflection unit 40, and the second light guide part 32, the predetermined angle ranges such that the light passing through the first light guide part 31 can be normally emitted toward the reflection unit 40, that is, when the light emitted from the optical axis reaches the reflective surface 41 and the included angle between the light incident on the reflective surface 41 and the reflective surface 41 is 75 ° to 90 °, the light emitted from the light source 10 does not have the off-axis phenomenon or the off-axis phenomenon within a controllable range, and the optical system 100 can be ensured to present a clear and good image quality.
In some embodiments of the present application, as shown in fig. 2, the light is emitted from the target exit surface 33 and then is vertically incident on the reflection surface 41. For example, the extending direction of the optical axis is defined as a vertical direction, and the light rays passing through the optical axis or the assumed light rays are reflected by the first light guide unit 31, then emitted to the reflection surface 41 perpendicularly along a direction parallel to the waveguide 30, and then emitted to the second light guide unit 32 by the reflection surface 41, and the light rays emitted from the waveguide 30 by the second light guide unit 32 or the assumed light rays are also extended in the vertical direction. That is, by limiting the light emitted from the target exit surface 33 to enter the reflection surface 41 in a vertical state, the off-axis problem of the light emitted from the light source 10 can be effectively avoided, thereby ensuring the imaging effect of the optical system 100.
According to some alternative embodiments of the present application, extensions of the optical axes coincide through an edge of the light emitting surface of the light source 10.
For example, as shown in fig. 2, the light source 10 may be a light-emitting screen capable of emitting light, and one side edge of the light-emitting screen may coincide with an extension line passing through the optical axis. Light emitted by the light source 10 that can pass through the optical axis or hypothetical light can be reflected by the light guiding surface and the reflecting surface 41 and finally can be emitted to the eye in a direction parallel to the optical axis.
In another embodiment of the present application, one side of the light source 10 is close to and spaced apart from an extension line of the optical axis by a predetermined distance.
For example, as shown in fig. 3, the light source 10 is defined as a light emitting screen which is horizontally disposed and can emit light, the left end of the light source 10 in fig. 3 is defined as an end point a, the right end of the light source 10 is defined as an end point B, and an intersection point of an extension line of an optical axis Z extending in the vertical direction and an extension line of the light emitting screen extending in the horizontal direction is defined as a point C. Points a and C are spaced apart, points a and B may each emit light, and none of the light emitted from points a and B passes through the optical axis Z. The hypothetical light rays emitted from point C can still vertically reach the reflecting surface 41 through the light guiding surface, and reflect the hypothetical light rays back to the second light guiding portion 32 through the reflecting surface 41, and enter the human eye 200 through the second light guiding portion 32.
In some embodiments of the present application, the light rays reflected by the second light guide parts 32 form a screen virtual image, and the inclination angle of the second light guide parts 32 with respect to the waveguide 30 is adjustable to adjust the position of the screen virtual image.
Considering that the light source 10 is offset to one side of the optical axis, i.e. the light source 10 is not arranged symmetrically in the center with respect to the collimating unit 20, for example, the light source 10 is arranged to be left or right with respect to the optical axis, there is a possibility that the binocular image is not overlapped (left or right), or the whole image is offset to one side (left or right together), which affects the imaging effect.
In one embodiment of the present application, as shown in fig. 4, the optical axis is defined as a virtual straight line extending in the horizontal direction, the reflecting surface 41 is defined as a plane extending in the horizontal direction, and the waveguide 30 is defined as extending in the vertical direction. On this basis, the light source 10 is defined as a light-emitting screen extending in a vertical direction, the light source 10 being located above the optical axis, a lower edge of the light source 10 coinciding with an extension of the optical axis. After the light that light source 10 sent passed through first light guide part 31, reflection unit 41 and the reflection of second light guide part 32, the screen virtual image that presents can be located the position that the horizontal visual angle of eyes is declined, and this design accords with the human habit of watching more, improves user's use and experiences.
In other embodiments of the present application, as shown in fig. 5, the optical axis is defined as a virtual straight line extending in the horizontal direction, the reflecting surface 41 is defined as a plane extending in the horizontal direction, and the waveguide 30 is defined as extending in the vertical direction. On this basis, the light source 10 is defined as a light-emitting screen extending in a vertical direction, the light source 10 being located above the optical axis, a lower edge of the light source 10 coinciding with an extension of the optical axis. In this embodiment, the inclination angle of the second light guide parts 32 with respect to the waveguide 30 is adjusted to some extent, and after rotating the second light guide parts 32 by a certain angle, the screen virtual image can be centered with respect to the horizontal visual angle of the eyes, but the screen virtual image may be inclined as shown in fig. 5, and the image seen by the human eyes may take a trapezoidal structure due to the features of the light rays in the near-far direction, in which case the screen virtual image may be corrected to a rectangular shape by software design. The method and structure for correcting the virtual image of the screen into a rectangle by software design are understood and easily implemented by those skilled in the art, and thus will not be described in detail.
According to an embodiment of the application, the optical system 100 further comprises: the cylindrical mirror 50 is disposed between the collimating unit 20 and the first light guiding portion 31, and the light emitted by the light source 10 is collimated by the collimating unit 20, and then transmitted to the waveguide 30 through the cylindrical mirror 50.
In other words, the cylindrical mirror 50 is located between the collimating unit 20 and the waveguide 30, and the cylindrical mirror 50 is opposite to the light guiding surface of the first light guiding part 31. The light emitted from the light source 10 can be collimated and adjusted by the collimating unit 20 and then incident into the cylindrical mirror 50, and the light passing through the cylindrical mirror 50 can be diffused or gathered. The cylindrical mirror 50 is usually a smooth and continuous surface, which not only can adjust the optical path, but also can reduce the scattering and loss of light.
According to an embodiment of the application, the optical system 100 further comprises: and a polarizing unit (not shown) disposed between the target exit surface 33 and the reflecting unit 40, for generating polarized light according to the light emitted from the reflecting surface 41.
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. When the screen virtual image is not centered and symmetrical, the screen virtual image can be polarized up and down by the polarization unit, such as up or down together. For example, the virtual image of the screen in fig. 4 is horizontally downward relative to the horizontal viewing angle of the eyes, and is more suitable for human habits.
In summary, according to the optical system 100 of the embodiment of the present application, the light source 10 is offset to one side of the optical axis of the collimating unit 20, and the first light guiding portion 31, the second light guiding portion 32 and the reflecting unit 40 are simultaneously matched, so that the light rays exiting the waveguide 30 after passing through the first light guiding portion 31, the second light guiding portion 32 and the reflecting unit 40 do not have off-axis or have controllable off-axis range, and the off-axis problem when the light rays emitted by the light source 10 reach the eye is avoided, so that the image quality of the optical imaging is better optimized, and the distortion symmetry is effectively corrected.
According to the wearable device of the embodiment of the application, the wearable device comprises the optical system 100 according to the embodiment, and the optical system 100 according to the embodiment of the application has the technical effects, so that the wearable device according to the embodiment of the application also has the corresponding technical effects, namely, the light of the light source 10 does not have off-axis when reaching the eyes, the image quality of optical imaging is better optimized, the distortion symmetry is effectively corrected, and the viewing experience effect of human eyes 200 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, the other end transmission that is close to the bridge of the nose to this lens, after reflection unit 40 reflects, light returns the lens, and derive people's eye 200 from the light derivation position on the lens, people's eye 200 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 present 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 (10)
1. An optical system, comprising:
a light source;
the collimating unit is arranged on a transmission path of the light source, and the light source is positioned on one side of an optical axis of the collimating unit;
the light source is arranged in the light guide groove, the light guide surface of the light guide part faces the light emergent surface of the light source, and the light emitted by the light source is collimated by the collimating unit, transmitted into the waveguide from the first end of the waveguide and reflected by the light guide surface and then emitted out of the target emergent surface;
a reflecting unit having a reflecting surface facing the target exit surface, the light emitted from the target exit surface being reflected by the reflecting surface to the second light guiding portion, and the second light guiding portion guiding the light reflected by the reflecting unit out of the waveguide;
the light guide unit comprises a light guide surface, a target emergent surface and a reflecting surface, wherein under the condition that the light is transmitted to the waveguide through the optical axis, the light is reflected by the light guide surface and then is emitted from the target emergent surface and transmitted to the reflecting surface, the light and the target tangent surface have a preset angle, and the target tangent surface is a tangent surface of a point projected by the light on the reflecting unit.
2. The optical system according to claim 1, wherein the point at which the light ray is projected on the reflection unit is located at a middle position of the reflection surface.
3. The optical system according to claim 1, wherein the predetermined angle is in the range of 75 ° -90 °.
4. The optical system of claim 3, wherein the light ray is emitted from the target exit surface and then is perpendicularly incident on the reflecting surface.
5. The optical system according to claim 1, wherein an extension line of the optical axis coincides with an edge of the light emitting surface of the light source.
6. The optical system according to claim 1, wherein one side of the light source is close to an extension of the optical axis and spaced apart from the extension of the optical axis by a predetermined distance.
7. The optical system according to claim 1, wherein the light rays reflected by the second light guide part form a virtual screen image, and an inclination angle of the second light guide part with respect to the waveguide is adjustable to adjust a position of the virtual screen image.
8. The optical system of claim 1, further comprising:
the cylindrical mirror is arranged between the collimation unit and the first light guide part, and light rays emitted by the light source are collimated by the collimation unit and then transmitted to the waveguide through the cylindrical mirror.
9. The optical system of claim 1, further comprising:
and the polarization unit is arranged between the target emergent surface and the reflection unit.
10. A wearable device comprising the optical system of any of claims 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110392114.5A CN113093324B (en) | 2021-04-12 | 2021-04-12 | Optical system and wearable equipment |
| PCT/CN2022/085857 WO2022218228A1 (en) | 2021-04-12 | 2022-04-08 | Optical system and wearable device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110392114.5A CN113093324B (en) | 2021-04-12 | 2021-04-12 | Optical system and wearable equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113093324A CN113093324A (en) | 2021-07-09 |
| CN113093324B true CN113093324B (en) | 2022-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110392114.5A Active CN113093324B (en) | 2021-04-12 | 2021-04-12 | Optical system and wearable equipment |
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| CN (1) | CN113093324B (en) |
| WO (1) | WO2022218228A1 (en) |
Families Citing this family (1)
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| CN113093324B (en) * | 2021-04-12 | 2022-09-02 | 维沃移动通信有限公司 | Optical system and wearable equipment |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080050669A (en) * | 2006-12-04 | 2008-06-10 | 엘지전자 주식회사 | Head up display apparatus for vehicle |
| JP4395802B2 (en) * | 2007-11-29 | 2010-01-13 | ソニー株式会社 | Image display device |
| JP4450058B2 (en) * | 2007-11-29 | 2010-04-14 | ソニー株式会社 | Image display device |
| WO2010044356A1 (en) * | 2008-10-14 | 2010-04-22 | コニカミノルタホールディングス株式会社 | Image display device and head-mount display |
| CN112444970B (en) * | 2019-08-30 | 2022-10-18 | 成都理想境界科技有限公司 | Large-view-field AR waveguide |
| CN111965813A (en) * | 2020-08-13 | 2020-11-20 | 上海慧希电子科技有限公司 | Optical device, system and optical apparatus |
| CN112130332A (en) * | 2020-10-28 | 2020-12-25 | 南京爱奇艺智能科技有限公司 | Augmented reality display structure and AR equipment applying same |
| CN112269266B (en) * | 2020-11-19 | 2022-11-18 | 维沃移动通信有限公司 | Optical system and wearable device |
| CN112230435A (en) * | 2020-11-19 | 2021-01-15 | 维沃移动通信有限公司 | Optical system and wearable device |
| CN113093324B (en) * | 2021-04-12 | 2022-09-02 | 维沃移动通信有限公司 | Optical system and wearable equipment |
-
2021
- 2021-04-12 CN CN202110392114.5A patent/CN113093324B/en active Active
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2022
- 2022-04-08 WO PCT/CN2022/085857 patent/WO2022218228A1/en unknown
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| WO2022218228A1 (en) | 2022-10-20 |
| CN113093324A (en) | 2021-07-09 |
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