CN110161688B - Refraction correction AR display device and wearable AR equipment - Google Patents
Refraction correction AR display device and wearable AR equipment Download PDFInfo
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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
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted 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
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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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
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
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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
- G02B2027/011—Head-up displays characterised by optical features comprising device for correcting geometrical aberrations, distortion
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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
- G02B2027/0112—Head-up displays characterised by optical features comprising device for genereting colour display
- G02B2027/0114—Head-up displays characterised by optical features comprising device for genereting colour display comprising dichroic elements
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Abstract
The invention provides a refraction correction AR display device and wearable AR equipment, which comprise an image projection device and an optical path component; the image projection device comprises an image source; the light path component comprises a spectroscope and a refraction correcting lens which are sequentially arranged. The technical scheme of the invention improves the integration level of the system, reduces the complexity of the system, reduces the weight of the system, reduces the number of lenses through which the human eyes observe the external environment, improves the light transmittance, reduces the stray light and reduces the requirement of the system on the exit pupil distance. At the same time, the design increases refraction and reflection of the curved mirror which is only reflected once. The number of refraction surfaces is increased on the premise of no change of the system volume, the design freedom degree is improved, a foundation is provided for reducing aberration and improving optical performance, the definition of an imaging system is higher while the volume is reduced, and the visual angle is larger.
Description
Technical Field
The invention relates to the technical field of augmented reality imaging, in particular to a refraction correction AR display device and wearable AR equipment.
Background
AR (Augmented Reality ) is also called mixed reality, and its principle is that virtual information is applied to the real world by computer technology, and a real environment and a virtual object are superimposed on the same screen or space in real time and exist at the same time.
Currently, people can interact with the real world through wearable devices, such as AR glasses or AR helmets, etc. As shown in fig. 1, the optical system of the conventional refraction correction AR display device includes an image source 11, a beam splitter 3, a correction lens 8, a curved half mirror 4 and a lens 12 above the beam splitter 3, wherein the image source 11 is disposed at an upper portion of the optical system, and a certain distance is provided between the image source 11 and the lens 12, and the image light of the image source 11 is incident into the lens 12 from above. At the same time, ambient light is incident from the right side to the left side (the direction of the human eye) of the curved half mirror 4, and disturbance light is incident from the lower direction of the spectroscope at the same time. Part of the image light is reflected by the beam splitter 3 to the curved half mirror 4, and part of the image light is reflected by the curved half mirror 4 to the beam splitter 3. Meanwhile, part of the ambient light passes through the curved half mirror 4, the spectroscope 3 and the correcting lens 8 in sequence to reach the human eyes; part of the interference light is reflected by the beam splitter 3 and then passes through the correcting lens 8 to reach the human eye. Part of the image light, part of the ambient light and part of the disturbing light finally reach the human eye through the corrective lens 8 at the same time, so that the user can see the external real environment and at the same time see the image of the image source 11 superimposed in the real environment.
The existing refractive correction AR display device has the following defects:
1. the correcting lens is arranged between the spectroscope and human eyes, has a complex structure, increases weight, causes more stray light and brightness loss on the optical surface, and can be worn only by a larger exit pupil distance, thereby having high requirements on system performance.
2. The volume of the system is limited and it is difficult to improve imaging quality and optical performance by increasing the number of lenses.
3. Prior art document 1 (CN 205539729U) discloses a micro display system, in which a refractive correction lens 105 has a light-emitting film R on a side far from a human eye 107, virtual image light of a display module 101 is reflected by a polarizing beam-splitting prism 104 and then transmitted into a refractive correction lens 5, reflected by the light-emitting film R and then transmitted through the refractive correction lens 5, and then transmitted through the polarizing beam-splitting prism 104 and then into the human eye. Because the reflective film R is disposed on the side of the refractive correction lens away from the human eye, the number of times that the virtual image light and the ambient light pass through each surface of the refractive correction lens 105 is different.
Disclosure of Invention
In view of the above problems in the prior art, the present invention provides a refractive correction AR display device and a wearable AR apparatus.
In a first aspect, an embodiment of the present invention provides a refractive correction AR display apparatus, including an image projection apparatus and an optical path component;
the image projection device comprises an image source;
The optical path assembly comprises a spectroscope and a refraction correcting lens which are sequentially arranged, wherein the refraction correcting lens comprises a refraction correcting substrate and a semi-transparent semi-reflective film, and the semi-transparent semi-reflective film is positioned on one side of the refraction correcting substrate.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the optical path component further includes an antireflection film, and the antireflection film is located on the other side of the refractive correction substrate.
With reference to the first aspect or the first possible implementation manner of the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein the image projection device further includes a lens.
With reference to the second possibility of the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the image source is closely attached to or separately disposed from the lens.
With reference to the first aspect, the first possibility of the first aspect, or the third possibility of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, wherein the beam splitter is a polarizing beam splitter, and the optical path component further includes a wave plate component, and the wave plate component is located between the polarizing beam splitter and the refractive correction lens.
With reference to the fourth possibility of the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, wherein the polarizing beam splitter includes a polarizing film and a polarizing beam splitter film;
The polarizing film is used for absorbing polarized light with a polarization state of a second direction through polarized light with the polarization state of the first direction;
the polarization splitting film is used for reflecting polarized light with the polarization state of the second direction through polarized light with the polarization state of the first direction;
The first direction and the second direction are perpendicular to each other.
With reference to the fifth possible implementation manner of the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein the polarizing beam splitting film is located on a side adjacent to the image projection device and the wave plate assembly, and the polarizing film is located on a side remote from the image projection device and the wave plate assembly.
With reference to the fifth or sixth possible implementation manner of the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, where the polarizing beam splitter further includes a beam splitter substrate; the spectroscope substrate is positioned at one side of the polarizing film far away from the image source, between the polarizing film and the polarizing beam splitting film or at one side of the polarizing beam splitting film near the image source.
With reference to the first aspect, an embodiment of the present invention provides an eighth possible implementation manner of the first aspect, wherein an angle between a reflection plane of the polarizing beam splitter and an optical axis of the refractive correction lens is α; the included angle between the normal line of the image source and the reflection plane of the polarization spectroscope is beta; alpha is within the range of beta-10 degrees to beta+10 degrees, and the alpha is more than or equal to 90 degrees and more than or equal to 0 degrees.
With reference to the eighth possible implementation manner of the first aspect, the embodiment of the present invention provides a ninth possible implementation manner of the first aspect, where β is 0 ° to 90 °.
With reference to the eighth possible implementation manner of the first aspect, the embodiment of the present invention provides a tenth possible implementation manner of the first aspect, where β is 40 ° to 50 °.
With reference to the ninth or tenth possible implementation manner of the first aspect, the embodiment of the present invention provides an eleventh possible implementation manner of the first aspect, where when the polarized light in the first direction and the polarized light in the second direction rotate about 0 ° to 360 ° in a direction of light propagation under a condition that they are perpendicular to each other, the polarizing beam splitting film and the wave plate assembly also change corresponding angles.
With reference to the eleventh possible implementation manner of the first aspect, an embodiment of the present invention provides a twelfth possible implementation manner of the first aspect, wherein the wave plate assembly is a 1/4 wave plate.
With reference to the twelfth possible implementation manner of the first aspect, an embodiment of the present invention provides a thirteenth possible implementation manner of the first aspect, wherein the 1/4 wave plate is disposed between the polarizing beam splitter and the refractive correction lens.
With reference to the twelfth possible implementation manner of the first aspect, an embodiment of the present invention provides a fourteenth possible implementation manner of the first aspect, wherein the 1/4 wave plate is attached to an inner side of the refractive correction lens.
With reference to the first aspect, an embodiment of the present invention provides a fifteenth possible implementation manner of the first aspect, where the image source is an image source of an integrated light source or a single image source.
In a second aspect, the embodiment of the present invention further provides a wearable device, which includes the clip member and the refractive correction AR display device described above.
The refraction correction AR display device and the wearable AR device provided by the invention adopt a polarized light path component, the polarized light path component comprises a polarized spectroscope, a wave plate component and a refraction correction lens which are sequentially arranged in the horizontal direction, and the image projection device is positioned above the polarized spectroscope. The image light rays emitted from the image projection device are projected onto the polarization spectroscope, polarized light in a first direction in the image light rays is emitted to the outside through the polarization spectroscope, and polarized light in a second direction in the image light rays is reflected onto the wave plate component; the polarized light is converted into circularly polarized light through the wave plate component, the circularly polarized light is incident to the refraction correcting lens, one part of light is emitted to the outside, the other part of light is reflected by the refraction correcting lens and then passes through the wave plate component, the circularly polarized light is converted into polarized light in the first direction, and the polarized light enters human eyes through the polarization spectroscope. The final portion of the image light is received by the human eye, enabling the user to see a virtual image at a large viewing angle.
The embodiment of the invention has the following beneficial effects:
The embodiment of the invention provides an AR display device with refraction correction, which comprises an image projection device and an optical path component; the image projection device comprises an image source; the light path component comprises a spectroscope and a refraction correcting lens which are sequentially arranged. The integration level of the system is improved, the complexity of the system is reduced, the weight of the system is reduced, the number of lenses through which the human eyes observe the external environment is reduced, the light transmittance is improved, the stray light is reduced, and the requirement of the system on the exit pupil distance is reduced. At the same time, the design increases refraction and reflection of the curved mirror which is only reflected once. The number of refraction surfaces is increased on the premise of no change of the system volume, the design freedom degree is improved, a foundation is provided for reducing aberration and improving optical performance, the definition of an imaging system is higher while the volume is reduced, and the visual angle is larger.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an AR display device according to the prior art;
FIG. 2 is a schematic diagram of a refractive correction AR display device according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a refractive correction AR display device according to a second embodiment of the present invention;
FIG. 4 is a schematic diagram of a polarizing beamsplitter according to an embodiment of the present invention;
Fig. 5 is a schematic structural diagram of a refractive correction lens according to an embodiment of the present invention.
Icon:
1-an image projection device; 11-image source; 12-lens; 3-spectroscope; 4-curved half mirror; 5-polarization spectroscope; 51-spectroscopic substrate; 52-a polarizing film; 53-polarization splitting film; a 6-wave plate assembly; 7-refractive corrective lenses; 71-an antireflection film; a 72-refractive corrective substrate; 73-semi-permeable semi-reflective membrane; 8-corrective lenses.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The present embodiment provides an AR display device, as shown in fig. 2, including an image projection device 1 and an optical path component;
The image projection apparatus 1 includes an image source 11 and a lens 12. The image projection apparatus may include only an image source. The image source 11 is used to display an image to be projected into human eyes, and the image source 11 may be a planar image source, including but not limited to an integrated light source or a single image source. For example, an OLED (Organic Light-Emitting Diode), LCOS (Liquid Crystal On Silicon ), LCD (Liquid CRYSTAL DISPLAY), MEMS (Microelectromechanical Systems, microelectromechanical display system), DMD (Digital Micro-mirror Device), and other electronic devices that display principles. Wherein, OLED and LCD are the image source of the integrated light source; LCOS, MEMS and DMD are single image sources, requiring additional auxiliary light sources.
Lens 12 may be a lens or a lens group of a plurality of lenses. Each lens in the lens or the lens group can be a convex lens, a concave lens or any combination of the convex lens and the concave lens, the surface type of the lens can be a spherical surface, an aspherical surface, a free-form surface and the like, and the lens 12 refracts light rays and cooperates with a polarized light path component to jointly complete imaging.
The optical path assembly comprises a spectroscope and a refraction correcting lens 7 which are sequentially arranged, wherein the refraction correcting lens 7 comprises a refraction correcting substrate 72 and a semi-transparent semi-reflective film 73, and the semi-transparent semi-reflective film 73 is positioned on one side, close to the spectroscope 3, of the refraction correcting substrate 72. The transflective film 73 can reflect a part of the incident light back to the spectroscope 3.
If the refractive correction lens 7 includes an antireflection film 71, a refractive correction substrate 72 and a transflective film 73, the antireflection film 71 is located at the other side of the refractive correction substrate 72 with respect to the transflective film 73, as shown in fig. 5, the transflective film, the refractive correction substrate and the antireflection film may be sequentially arranged along the thickness direction to form a curved refractive half mirror with a refractive correction function, light is emitted from the image source 11, shaped by the lens 12 or the lens group, and is transmitted to the spectroscope 3, a part of the light is reflected by the spectroscope 3, and is transmitted to the refractive correction lens 7, a part of the light is reflected by the transflective film 73, and is transmitted to the spectroscope 3 again, wherein a part of the light is transmitted to the human eye through the spectroscope 3, and parameters such as curvature, thickness, interval and refractive index of optical elements in the system are adjusted when the refractive error of the human eye is considered during design, so that the human eye can see a clear virtual image.
It should be noted that, the reflection plane of the spectroscope 3 forms an angle α with the optical axis of the refractive correction lens 7, and an included angle between the normal line of the image source and the reflection plane of the spectroscope 3 is β; alpha is within the range of beta-10 degrees to beta+10 degrees, and the alpha is more than or equal to 90 degrees and more than or equal to 0 degrees. Beta is between 0 deg. and 90 deg., preferably between 40 deg. and 50 deg., where the field of view of the image light is maximum and the visible range of the image light is maximum.
In summary, the refraction-correcting AR display device provided in the present embodiment has the following advantages:
Firstly, by designing parameters such as surface types, thickness, materials and the like of two surfaces, the curved mirror which is only reflected once originally is increased to be refracted once for two times. The number of refraction surfaces is increased on the premise of no change of the system volume, the design freedom degree is improved, a foundation is provided for reducing aberration and improving optical performance, the definition of an imaging system is higher while the volume is reduced, and the visual angle is larger.
Second, provide the dioptric corrective lens, be convenient for vision problematic user wear, improved AR glasses's practicality.
Example two
The image projection apparatus 1 includes an image source 11 and a lens 12. The image projection apparatus may include only an image source. The image source 11 is used to display an image to be projected into human eyes, and the image source 11 may be a planar image source, including but not limited to an integrated light source or a single image source. For example, an OLED (Organic Light-Emitting Diode), LCOS (Liquid Crystal On Silicon ), LCD (Liquid CRYSTAL DISPLAY), MEMS (Microelectromechanical Systems, microelectromechanical display system), DMD (Digital Micro-mirror Device), and other electronic devices that display principles. Wherein, OLED and LCD are the image source of the integrated light source; LCOS, MEMS and DMD are single image sources, requiring additional auxiliary light sources.
Lens 12 may be a lens or a lens group of a plurality of lenses. Each lens in the lens or the lens group can be a convex lens, a concave lens or any combination of the convex lens and the concave lens, the surface type of the lens can be a spherical surface, an aspherical surface, a free-form surface and the like, and the lens 12 refracts light rays and cooperates with a polarized light path component to jointly complete imaging.
The optical path assembly comprises a spectroscope and a refraction correcting lens 7 which are sequentially arranged, wherein the refraction correcting lens 7 comprises a refraction correcting substrate 72 and a semi-transparent semi-reflective film 73, and the semi-transparent semi-reflective film 73 is positioned on one side, close to the spectroscope, of the refraction correcting substrate 72. The transflective film 73 may reflect a portion of the incident light back to the beam splitter 3.
Light is emitted from the image source 11, is shaped by the lens 12 or the lens group, and is emitted to the spectroscope 3, a part of light is reflected by the spectroscope 3, is emitted to the refraction correcting lens 7, a part of light is reflected by the semi-transparent semi-reflective film 73, and is emitted to the spectroscope 3 again, wherein a part of light is emitted to the human eye through the spectroscope 3, and parameters such as curvature, thickness, interval, refractive index and the like of optical elements in the system are adjusted by considering the refraction error condition of the human eye in the design process, so that the human eye with the refraction error can see clear virtual images.
Alternatively, the beam splitter in this embodiment may be a common beam splitter, or a polarizing beam splitter 5 may be used. When the beam splitter is the polarizing beam splitter 5, the optical path assembly includes the polarizing beam splitter 5, the wave plate assembly 6, and the refractive correction lens 7, which are sequentially arranged in the horizontal direction. The polarizing beam splitter 5 is located below or above the image projection apparatus 1. The wave plate assembly 6 is located between the polarizing beam splitter 5 and the refractive correction lens 7. As shown in fig. 4, the polarization beam splitter 5 includes a beam splitter substrate 51, a polarizing film 52, and a polarization beam splitter film 53. The polarizing film 52 is configured to absorb polarized light having a second polarization state by passing the polarized light having the first polarization state. The polarization splitting film 53 is configured to reflect polarized light having a second polarization state by passing polarized light having a first polarization state. The polarization beam splitter 5 is disposed obliquely, the polarization beam splitter film 53 is located on a side close to the image projection apparatus 1 and the wave plate assembly 6, and the polarization film 52 is located on a side away from the image projection apparatus 1 and the wave plate assembly 6.
Wherein the first direction and the second direction are perpendicular to each other. For example, the first direction polarized light may be polarized light having a polarization state of P direction, and the second direction polarized light may be polarized light having a polarization state of S direction. In consideration of that the P-polarized light and the S-polarized light can rotate around the light propagation direction on the premise of being perpendicular to each other, the polarized light in the first direction may be polarized light with a certain polarization state and a certain angle with respect to the P-direction, and the polarized light in the second direction may be polarized light with a certain polarization state and a certain angle with respect to the S-direction.
The arrangement sequence of the polarizing film, the spectroscope substrate and the polarizing beam-splitting film along the thickness direction may be as shown in fig. 4, and the arrangement sequence is the spectroscope substrate, the polarizing film and the polarizing beam-splitting film in sequence, that is, the spectroscope substrate is located at the outer side of the polarizing film; or a polarizing film, a spectroscope substrate and a polarizing beam-splitting film, namely the spectroscope substrate is positioned between the polarizing film and the polarizing beam-splitting film; or a polarizing film, a polarizing beam-splitting film and a beam splitter substrate, i.e. the beam splitter substrate is positioned outside the polarizing beam-splitting film.
Alternatively, the polarizing beam splitter 5 may not include the beam splitter substrate, and may include only a polarizing film and a polarizing beam splitter film. The polarization splitting film is positioned on one side close to the image projection device and the wave plate component, and the polarization film is positioned on one side far away from the image projection device and the wave plate component.
Because the conventional AR display device uses a common spectroscope, a large amount of interference light enters human eyes, and the interference light emitted from the outside seriously interferes with the contrast of an image, so that the image content is disordered, and the contrast of the image is seriously affected.
In this embodiment, when the external interference light is incident into the polarizing beam splitter 5, the interference light will first pass through the polarizing film 52, the polarized light in the second direction is absorbed, and the polarized light in the other first direction will pass through the polarizing film and the polarizing beam splitter, so that no interference light is reflected into the human eye basically, and the image viewing contrast can be improved, and the interference is reduced.
As shown in fig. 3, the reflection plane of the polarizing beam splitter 5 forms an angle alpha with the optical axis of the refraction correcting lens 7, and an included angle between the normal line of the image source and the reflection plane of the polarizing beam splitter is beta; alpha is within the range of beta-10 degrees to beta+10 degrees, and the alpha is more than or equal to 90 degrees and more than or equal to 0 degrees. Beta is between 0 deg. and 90 deg., preferably between 40 deg. and 50 deg., where the field of view of the image light is maximum and the visible range of the image light is maximum.
The waveplate assembly 6 may employ a 1/4 waveplate. The 1/4 wave plate is used for converting incident second polarized light into circularly polarized light. The 1/4 wave plate can be of a planar structure or a curved surface structure; the 1/4 wave plate can also be a cylindrical structure; the 1/4 wave plate can also be in a spherical or aspherical structure. The 1/4 wave plate may be disposed between the polarizing beamsplitter 5 and the refractive correction lens 7 as shown in fig. 3. The 1/4 wave plate may also be attached to the inner side of the refractive correction lens 7, i.e. the side adjacent to the polarizing beam splitter 5.
The first polarized light and the second polarized light can rotate around the light propagation direction by 0-360 degrees on the premise of meeting the mutual perpendicular conditions, and at the moment, the corresponding angles of the polarization splitting film and the 1/4 wave plate are also changed. Thus, at the time of production, the installation angles of the polarizing beam splitter and the wave plate assembly can be determined based on the angles of the polarized light in the first direction and the polarized light in the second direction.
In summary, the refraction-correcting AR display device provided in the present embodiment has the following advantages:
first, the multilayer film polarization spectroscope removes the interference light, the image has no stray light, and the contrast ratio is high.
Second, the energy efficiency of the image light is improved to 25%, and the brightness is obviously improved.
Thirdly, by designing parameters such as surface type, thickness, material and the like of the two surfaces, the original curved mirror capable of reflecting only once is increased to be capable of refracting once for two times. The number of refraction surfaces is increased on the premise of no change of the system volume, the design freedom degree is improved, a foundation is provided for reducing aberration and improving optical performance, the definition of an imaging system is higher while the volume is reduced, and the visual angle is larger.
Fourth, provide the refraction and correct the lens, be convenient for vision problem's user wears, improved the practicality of AR glasses.
Fifth, the integration level of the system is improved, the complexity of the system is reduced, the weight of the system is reduced, the number of lenses through which the human eyes observe the external environment is reduced, the light transmittance is improved, the stray light is reduced, and the requirement of the system on the exit pupil distance is reduced.
Example III
The wearing formula AR equipment of this embodiment is provided with foretell refraction and corrects AR display device, and refraction corrects AR display device and adopts the polarized light path subassembly, and polarized light path subassembly is including the polarization spectroscope, wave plate subassembly and the refraction correction lens that arrange in proper order, and image projection device is located the top of polarization spectroscope. The image light rays emitted from the image projection device are projected onto the polarization spectroscope, light with the polarization state of a first direction in the image light rays enters the external environment through the polarization spectroscope, and part of light with the polarization state of a second direction in the image light rays is reflected onto the wave plate component; the light is converted into circularly polarized light through the wave plate component, the circularly polarized light is incident to the refraction correcting lens, one part of light is emitted to the outside, the other part of light is reflected by the refraction correcting lens and then passes through the wave plate component, the circularly polarized light is converted into light with a polarization state of a first direction, and the light enters human eyes through the polarization spectroscope. The virtual image with a large visual angle can be seen by a user, the light energy utilization rate is improved, and the light brightness of the image is improved. Under the condition of the same image light brightness requirement, the refraction correction AR display device can save energy consumption and reduce the heat productivity of equipment.
Meanwhile, the method has the following advantages: by improving the refractive index of the image space, a larger numerical aperture is realized by using a relatively small aperture angle, so that the deflection angle of marginal rays is reduced, and the design difficulty is reduced; the refractive index difference of the lens interface is reduced, the transmittance of marginal rays is improved, ghost images are reduced, and the brightness is enhanced; the components are compactly arranged, the assembly and adjustment are convenient, the system strength is high, the weight is lighter, and the wearing is comfortable; the polarized spectroscope removes interference light, the image has no stray light and the contrast is high; the energy efficiency of the image light is improved to about 25%, and the brightness is obviously improved; by designing parameters such as surface shape, thickness, material and the like of the two sides of the diopter correcting lens, the original curved mirror with only one reflection is increased to be twice refracted and one reflection. The number of refraction surfaces is increased on the premise of no change of the system volume, the design freedom degree is improved, a foundation is provided for reducing aberration and improving optical performance, the definition of an imaging system is higher while the volume is reduced, and the visual angle is larger.
The refraction correction AR display device and the wearable AR device provided by the embodiment of the invention have the same technical characteristics, so that the same technical problems can be solved, and the same technical effects can be achieved.
It should be noted that in the embodiments provided in the present invention, it should be understood that the disclosed system and method may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the destination of the embodiment.
In addition, each functional unit in the embodiments provided in the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. An AR display device is characterized by comprising an image projection device and an optical path component;
The image projection device comprises an image source and a lens, wherein the image source and the lens are arranged in a separated mode; wherein the lens is used for enabling the eyes with refractive errors to see clear virtual images;
the optical path component comprises a spectroscope and a refraction correcting lens which are sequentially arranged, wherein the refraction correcting lens comprises a refraction correcting substrate and a semi-transparent semi-reflective film, and the semi-transparent semi-reflective film is positioned on one side of the refraction correcting substrate, which is close to the spectroscope;
The refraction correcting lens further comprises an antireflection film, wherein the semi-transparent and semi-reflective film, the refraction correcting substrate and the antireflection film are sequentially arranged along the thickness direction to form a curved refraction and semi-reflective mirror with a refraction correcting function;
wherein the refractive corrective lens is used only to correct ambient light;
wherein the spectroscope is a polarizing spectroscope; the optical path component further comprises a wave plate component, and the wave plate component is positioned between the polarization spectroscope and the refraction correcting lens;
The polarizing spectroscope only comprises a polarizing film and a polarizing beam splitting film, or comprises a polarizing film, a polarizing beam splitting film and a spectroscope substrate;
The lens is used for shaping the image source light so that a clear virtual image is seen by a person with ametropia, the shaped image source light is transmitted to the polarization spectroscope, a part of the image source light is reflected by the polarization spectroscope, transmitted to the refraction correcting lens through the wave plate component, reflected by the semi-transparent and semi-reflective film positioned on one side of the refraction correcting substrate, which is close to the spectroscope, and transmitted to the spectroscope through the wave plate component, and transmitted to the person with the eye through the spectroscope;
The ambient light is transmitted to the wave plate component after passing through the antireflection film, the refraction correction substrate and the semi-transparent and semi-reflective film in sequence, is transmitted to the spectroscope by the wave plate component, and is transmitted to human eyes by the spectroscope;
The included angle between the reflecting plane of the spectroscope and the optical axis of the refraction correcting lens is alpha; the included angle between the normal line of the image source and the reflection plane of the spectroscope is beta, and beta is 40-50 degrees; alpha is in the range of beta-10 degrees to beta+10 degrees, and the value of alpha is more than or equal to 90 degrees and more than or equal to 0 degrees;
the lens and the refraction correcting lens are positioned on the same side of the polarization spectroscope.
2. The refractive correction AR display device according to claim 1, wherein the polarization splitting film is located on a side adjacent to the image projection device and the wave plate assembly, and the polarization film is located on a side remote from the image projection device and the wave plate assembly.
3. The refraction-corrected AR display device according to claim 1, wherein when the polarized light in the first direction and the polarized light in the second direction are rotated about the direction of light propagation by 0 ° to 360 ° while satisfying the mutually perpendicular conditions, the polarization splitting film and the wave plate assembly also change the respective angles.
4. The refractive correction AR display device of claim 1, wherein the waveplate assembly is a 1/4 waveplate.
5. The refractive correction AR display device according to claim 4, wherein the 1/4 wave plate is attached to a side of the refractive correction lens adjacent to the polarizing beam splitter.
6. The refractive correction AR display device of claim 1, wherein the image source is an integrated light source or a single image source.
7. A wearable AR device comprising a collar member and a refractive corrective AR display device as claimed in any one of claims 1 to 6.
Priority Applications (30)
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| CN201810147326.5A CN110161688B (en) | 2018-02-12 | 2018-02-12 | Refraction correction AR display device and wearable AR equipment |
| EP19750620.7A EP3754409A4 (en) | 2018-02-12 | 2019-02-12 | Augmented reality device and optical system used therein |
| KR1020207026342A KR102564295B1 (en) | 2018-02-12 | 2019-02-12 | Augmented reality device and optical system and semi-reflector therefor |
| JP2020565011A JP7285579B2 (en) | 2018-02-12 | 2019-02-12 | Augmented reality device and optical system therefor |
| PCT/CN2019/074857 WO2019154428A1 (en) | 2018-02-12 | 2019-02-12 | Augmented reality device, optical system and half mirror employed therein |
| PCT/CN2019/074863 WO2019154429A1 (en) | 2018-02-12 | 2019-02-12 | Wearable ar system, and ar display device and projection source module thereof |
| PCT/CN2019/074852 WO2019154426A1 (en) | 2018-02-12 | 2019-02-12 | Augmented reality device and optical system used therein |
| EP19750619.9A EP3754408A4 (en) | 2018-02-12 | 2019-02-12 | Wearable ar system, and ar display device and projection source module thereof |
| CN201980001732.3A CN110537135A (en) | 2018-02-12 | 2019-02-12 | Augmented reality equipment and its employed in optical system and half-reflecting mirror |
| CN201980001721.5A CN110537133A (en) | 2018-02-12 | 2019-02-12 | Wearable AR system, AR show equipment and its projection source mould group |
| EP19750326.1A EP3754407B1 (en) | 2018-02-12 | 2019-02-12 | Augmented reality device and optical system used therein |
| KR1020207026326A KR102455328B1 (en) | 2018-02-12 | 2019-02-12 | Augmented reality device and optical system therefor |
| JP2020565008A JP7418706B2 (en) | 2018-02-12 | 2019-02-12 | Augmented reality device and optical system therefor |
| CN201980001716.4A CN110573933A (en) | 2018-02-12 | 2019-02-12 | Wearable AR system, AR display equipment and projection source module thereof |
| EP19751742.8A EP3754411A4 (en) | 2018-02-12 | 2019-02-12 | Wearable ar system, ar display device, and projection source module thereof |
| CN201980001727.2A CN110537134A (en) | 2018-02-12 | 2019-02-12 | Augmented reality equipment and its employed in optical system |
| PCT/CN2019/074868 WO2019154430A1 (en) | 2018-02-12 | 2019-02-12 | Wearable ar system, ar display device, and projection source module thereof |
| EP19750958.1A EP3754410A4 (en) | 2018-02-12 | 2019-02-12 | Augmented reality device, optical system and half mirror employed therein |
| PCT/CN2019/074876 WO2019154432A1 (en) | 2018-02-12 | 2019-02-12 | Augmented reality device and optical system used therein |
| KR1020207026193A KR102628264B1 (en) | 2018-02-12 | 2019-02-12 | Augmented reality devices and optical systems used in augmented reality devices |
| CN201980001731.9A CN110546550A (en) | 2018-02-12 | 2019-02-12 | Augmented reality device and optical system used therein |
| JP2020565009A JP7329207B2 (en) | 2018-02-12 | 2019-02-12 | Augmented reality device and optical system and semi-reflector therefor |
| US16/930,156 US11693245B2 (en) | 2018-02-12 | 2020-07-15 | Wearable AR system, AR display device and its projection source module |
| US16/930,061 US11693244B2 (en) | 2018-02-12 | 2020-07-15 | Augmented reality apparatus and optical system therefor |
| US16/930,000 US11042040B2 (en) | 2018-02-12 | 2020-07-15 | Augmented reality apparatus and optical system therefor |
| US16/989,502 US11874466B2 (en) | 2018-02-12 | 2020-08-10 | Augmented reality apparatus, and optical system and semi-reflector therefor |
| US16/990,633 US11500205B2 (en) | 2018-02-12 | 2020-08-11 | Wearable AR system, AR display device and its projection source module |
| US17/326,014 US11460704B2 (en) | 2018-02-12 | 2021-05-20 | Augmented reality apparatus and optical system therefor |
| US18/325,986 US11988839B2 (en) | 2018-02-12 | 2023-05-30 | Augmented reality apparatus and optical system therefor |
| US18/624,141 US20240241384A1 (en) | 2018-02-12 | 2024-04-02 | Augmented reality apparatus and optical system therefor |
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| CN201810147326.5A CN110161688B (en) | 2018-02-12 | 2018-02-12 | Refraction correction AR display device and wearable AR equipment |
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