CN207301489U - A kind of wearable optical system and device - Google Patents
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Abstract
This application involves a kind of wearable optical system and device.The wearable optical system includes：Display unit, the display unit are configured to generation image information；And image combining unit, described image combining unit are configured to receive the light of the expression described image information from the display unit, the light is synthesized with extraneous scene via described image combining unit and watched for observer.The light of described image information is guided via lens subassembly, then the eyes of the observer are transmitted into by the amplification of the first free curved surface prism and the eyes for being reflected into the observer of the second free curved surface prism, the external world synthesis face of the scene through the first free curved surface prism and the second free curved surface prism.The wearable optical system prism thickness of the application is small, light-weight, compact-sized, and image quality is high.
Description
Technical Field
The present application relates to optical projection display technology, and more particularly to wearable optical projection systems and devices.
Background
Optical systems with light weight, portability comfort and high imaging quality of wearable devices are currently the goals sought after in optical design. Wearable projection equipment appears in the military field at first, can show tactical information in real time, and supplementary target aims discernment still can be used to night vision system. With the continuous progress of design concept, manufacturing level and micro-display technology, wearable projection devices are increasingly miniaturized and gradually enter people's daily life. However, the wearable projection optical system has the problems of complex structure, high precision of installation and adjustment and processing requirements, large volume and weight, neck fatigue caused by long-time wearing and the like.
Accordingly, there is a need in the art for improved wearable projection optics.
Disclosure of Invention
To achieve the above objects, the present application provides a wearable optical projection system and apparatus to improve image quality, and to reduce volume and weight.
According to an embodiment of the present application, there is provided a wearable optical system including: a display section configured to generate image information; and an image synthesis section configured to receive light representing the image information from the display section, the light being synthesized with an outside scene via the image synthesis section for viewing by an observer.
According to one aspect of the present application, the optical system further includes a lens assembly, the image combining portion includes a first free-form surface prism and a second free-form surface prism, the light of the image information is guided by the lens assembly and then enters the eye of the observer through the enlargement of the first free-form surface prism and the reflection of the second free-form surface prism, and the external scene is transmitted into the eye of the observer through a combining surface of the first free-form surface prism and the second free-form surface prism.
According to one aspect of the present application, the lens assembly includes a first aspheric lens and a second aspheric lens configured to correct aberrations resulting from the first freeform prism magnification image.
According to one aspect of the present application, the first aspheric lens is a rectangular positive lens, a first surface of the first aspheric lens is aspheric, and a second surface of the first aspheric lens is spherical; the second aspheric lens is a rectangular negative lens, the first surface of the second aspheric lens is aspheric, and the second surface of the second aspheric lens is spherical; the first free-form surface prism comprises one or more free-form surfaces; the second free-form surface prism comprises an inclined plane which is a free-form surface, and the free-form surface of the second free-form surface prism is plated with a semi-reflecting and semi-transparent film and is glued with one free-form surface of the first free-form surface prism to form the synthetic surface.
According to one aspect of the application, the display part is a self-luminous liquid crystal on silicon display pixel, and the included angle theta between the emergent ray at the edge of the image plane and the normal line of the image plane is more than or equal to +/-10 degrees and less than or equal to 150 degrees.
According to an aspect of the present application, the first free-form surface prism is a main function magnifying prism, and magnifies and adjusts the image information generated by the display unit so that parallel light enters the eyes of the observer.
According to an aspect of the present application, the first free-form surface prism includes three free-form surfaces, and a surface type of the three free-form surfaces of the first free-form surface prism is one of: anamorphic aspheres, polynomial surfaces, and biquadratic surfaces.
According to an aspect of the present application, an incident angle relationship when the edge light ray on the maximum field of view in the vertical direction intersects the surfaces of the first and second free-form surface prisms twice satisfies the following relation:
wherein theta is1Is the incident angle theta of the edge light ray emitted from the display part for the third time passing through the edge of the first free-form surface prism in the maximum visual field in the vertical direction2The value of n' is the refractive index of the material, and is the incident angle when the marginal ray on the maximum visual field in the vertical direction passes through the second free-form surface prism for the last time.
According to one aspect of the application, the tangent ratio of the horizontal field angle to the vertical field angle of the observer is 16: 9.
According to another embodiment of the present application, there is provided a wearable device including: a processor configured to communicate with the display to provide image information to the display; the display section configured to display image information from the processor; and an image synthesis section configured to receive light representing the image information from the display section, the light being synthesized with an outside scene via the image synthesis section for viewing by an observer.
According to an aspect of the application, the wearable device further includes a lens assembly, the image combining section includes a first free-form surface prism and a second free-form surface prism, the light from the display section representing the image information is guided through the lens assembly and then enters the eye of the observer through the enlargement of the first free-form surface prism and the reflection of the second free-form surface prism, and the external scene is transmitted into the eye of the observer through a combining surface of the first free-form surface prism and the second free-form surface prism.
According to one aspect of the present application, the lens assembly includes a first aspheric lens and a second aspheric lens configured to correct aberrations resulting from the first freeform prism magnification image.
According to one aspect of the present application, the first aspheric lens is a rectangular positive lens, a first surface of the first aspheric lens is aspheric, and a second surface of the first aspheric lens is spherical; the second aspheric lens is a rectangular negative lens, the first surface of the second aspheric lens is aspheric, and the second surface of the second aspheric lens is spherical; the first free-form surface prism comprises one or more free-form surface free-form surfaces; the second free-form surface prism comprises an inclined plane which is a free-form surface, and the free-form surface of the second free-form surface prism is plated with a semi-reflecting and semi-transparent film and is glued with one free-form surface of the first free-form surface prism to form the synthetic surface.
Traditional lens formula structure is mostly rotational symmetry's eyepiece structure, and although optical property can be close diffraction limit and can rectify the distortion to a certain extent, the structure of multiunit lens is complicated, and the dress is transferred and is required the precision with processing high, and volume weight is also very big, wears for a long time and can arouse neck fatigue. Compare in traditional lens formula or free curved surface/refraction and diffraction mixed structure, the wearable optical projection system that this application provided images high quality to simple structure, small, light in weight wear comfortablely.
The wearable optical projection technology can be widely applied to various fields of virtual reality technologies such as entertainment, simulation training and surgical operations.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a wearable optical system according to an embodiment of the present application;
fig. 2 is a schematic view of a portion of a light path of a wearable optical system according to an embodiment of the present application;
fig. 3 is a vertical axis aberration characteristic curve of the wearable optical system according to an embodiment of the present application;
fig. 4 is a field curvature and distortion characteristic of a wearable optical system according to an embodiment of the present application;
fig. 5 is a modulation transfer function characteristic MTF of a wearable optical system according to an embodiment of the present application; and
FIG. 6 is a block diagram of an exemplary computer system according to an embodiment of the present application.
Detailed Description
Various embodiments will be described in detail with reference to the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. References made to specific examples and implementations are for illustrative purposes, and are not intended to limit the scope of the application or claims.
The word "exemplary" is used herein to mean "serving as an example, instance, or illustration. Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.
The optical system of the wearable projection display equipment is an image amplification system, an image generated by the micro display is amplified by the optical system, an amplified virtual image is presented at a certain distance in front of human eyes, and a user can be completely immersed in a virtual situation and can also be combined with reality to form an expanded reality scene.
The application provides a portable wearable projection optical system. As shown in fig. 1, the wearable optical system 100 may include a display part 5, a lens assembly 110, and an image combining part 120. The display section 5 is configured to generate image information, for example, the display section 5 may be a picture element, such as a liquid crystal on silicon (Lcos) display element. The image synthesis portion 120 is configured to receive light representing the image information from the display portion 5, the light being synthesized with the external scene 130 via the image synthesis portion 120 for viewing by an observer 140. The lens assembly 110 may include a first aspheric lens 4 and a second aspheric lens 3. The image combining part 120 may include a first free-form surface prism 2 and a second free-form surface prism 1. Wherein the first surface 1a of the second free-form surface prism 1 is a free-form surface, and the other surfaces 11, 12, 13 of the second free-form surface prism 1 are planes; three surfaces 2a, 2b, 2c of the first free-form surface prism 2 are all free-form surfaces, and the remaining surfaces 21, 22, 23, 24, 25, 26 of the first free-form surface prism 2 are all flat surfaces.
The observation portion 140 includes an eye of the user, i.e., a human eye or an entrance pupil. Light representing image information is guided through the lens assembly 110 and then enters the user's eye through the enlargement of the first free-form surface prism 2 and the reflection of the second free-form surface prism 1, and the external scene 130 is transmitted into the user's eye through the combined surface of the first free-form surface prism 2 and the second free-form surface prism 1. The first aspherical lens 4 and the second aspherical lens 3 are configured to correct aberrations generated by the first free-form prism magnified image. The first free-form surface prism is a main function magnifying prism, and the first free-form surface prism magnifies and adjusts the image information generated by the display part into parallel light which enters the eyes of a user.
From the object side to the human eye side, the wearable optical system includes: lcos5, first aspheric lens 4, second aspheric lens 3, first free-form surface prism 2, and second free-form surface prism 1. One surface pixel (see fig. 1) generates an image, light of the image sequentially passes through aberration correction of the first aspheric lens and the second aspheric lens, then passes through an entrance pupil, namely a human eye, which is entered by the amplification of the first free-form surface prism and the reflection of the second free-form surface, and the optical path diagram of the optical system is shown in fig. 2.
The first free-form surface 1a of the first free-form surface prism is a synthetic surface of the outside scene and the virtual image, the surface is plated with a semi-reflecting and semi-permeable film, and the outside scene and the virtual image are synthesized and then enter human eyes through the surface.
In one embodiment, the profile of the free-form surface prisms 2 and 1 may be one of three profiles: anamorphic aspheric surfaces, toric XY polynomial surfaces, and bi-quadric surfaces.
a. Deformed aspheric surface
In the formula (1), CxIs the radius of curvature of the curved surface in the X-Z plane in the X direction, CyIs the radius of curvature, K, of the curved surface in the Y-Z plane in the Y directionxIs the coefficient of the quadratic curve, K, of the curved surface in the X directionyIs the coefficient of the quadratic curve in the Y direction of the curved surface, AiIs 4,6,8,10, … 2 order n aspheric coefficients, and has rotational symmetry about the Z axis, PiIs a 4,6,8,10, … 2 order n non-rotationally symmetric coefficient. The XYZ direction is shown in FIG. 1(X direction is out of the plane of the drawing, Y direction is up, and Z direction is right). Each parameter is in the real range.
b. Toric XY polynomial surface
Surface equation of toric XY polynomial surface (AXYP):
wherein, cx，cyThe radius of curvature, k, of the apex of the curved surface in the meridian and sagittal directions, respectivelyx，kyCoefficient of quadric surface, C, in the meridional and sagittal directions, respectively(m,n)Is a polynomial xmynP is the highest power of the polynomial. Each parameter is in the real range.
c. Double quadric surface
Wherein,
the radius value in the X direction is set in the first parameter column. If set to 0, the radius value in the x-direction is considered to be infinite. Parameter definition of biquadric: a first parameter Rx, a second parameter Kx. Where Kx is the coefficient of the quadric surface. Each parameter is a real number range.
In one embodiment, the aspheric surface has the following equation:
where c is the radius of curvature, k is the coefficient of the quadric surface, other parameters are the first parameter α1a second parameter α2a third parameter alpha3fourth parameter alpha4a fifth parameter α5a sixth parameter alpha6a seventh parameter α7the eighth parameter alpha8. Each one ofThe parameter is a real number range.
As shown in fig. 1, the relationship of the incident angles when the marginal ray in the maximum field of view in the vertical direction (Y direction) intersects the surfaces of the first and second free-form surface prisms twice satisfies the following relational expression:
wherein theta is1The angle of incidence theta is the angle of incidence when the edge light ray on the maximum visual field in the vertical direction is emitted from the display part and passes through the edge of the first free-form surface prism2The angle of incidence when the edge light in the maximum view field in the vertical direction passes through the second free-form surface prism is shown, the value of n 'is the refractive index of the material used by the second free-form surface prism, and the value range of n' can be 1.4 to 1.6. The second free-form surface prism can be made of optical glass, optical plastic, optical resin and the like. .
For simplicity, θ is shown in the figure1The angle of incidence is the angle of incidence when the marginal ray of the maximum visual field in the vertical direction is emitted from the display part and passes through the edge of the first free-form surface prism for the fifth time. Optionally, the incident angles θ of the edge rays on the maximum field of view in the vertical direction when the third, fourth, and fifth times exit from the display part through the edge of the first free-form surface prism1All satisfy the above relation. Also, for simplicity, θ is shown in the figure2The angle of incidence is the angle of incidence when the edge light ray on the maximum view field in the vertical direction passes through the second free-form surface prism for the last time. Optionally, the incident angles θ of the edge rays on the maximum field of view in the vertical direction when the first and last pass through the second free-form surface prism2All satisfy the above relation.
In one embodiment, the first free-form surface prism 2 is glued with the second free-form surface prism 1, the gluing surface is a first free-form surface 2c of the first free-form surface prism, and a semi-reflecting and semi-transparent film is plated on a free-form surface 1a of the second free-form surface prism.
In one embodiment, the display portion may be a self-luminous liquid crystal on silicon display element. As shown in FIG. 1, the image plane emergence angle theta is the angle between the emergent ray at the edge of the image plane and the normal of the image plane, and theta is in the range of +/-10 degrees and not more than theta and not more than 150 degrees. For example, the image plane exit angle θ may be ± 5 °, or ± 10 °. When theta is within +/-5 degrees, the view field is small, and the obtained illumination intensity is high; when theta is within +/-10 degrees, the field of view is large, and the obtained illumination is slightly low.
In one embodiment, the horizontal field angle of the user's eyes is ω in the range of ± 10 ° ≦ ω ≦ 60 °, for example, ω (see fig. 1) may take ± 7.5 °. The vertical field angle h of the user's eyes is in the range of + -6 deg. ≦ ω ≦ 40 deg., for example, h (the vertical direction of ω) may take + -6 deg.. The tangent ratio of the horizontal field angle to the vertical field angle is 16: 9.
in one embodiment, the entrance pupil η (see FIG. 1) of the user's eye may range from 3 ≦ η ≦ 8, for example, the entrance pupil η may be 5 mm. the distance between the human eye's entrance pupil and the second freeform prism surface 13, i.e., the entrance pupil distance l, ranges from 15 ≦ l ≦ 20mm, for example, the entrance pupil distance l is 20 mm. the thickness of the first freeform prism, i.e., the horizontal distance between surface 26 and surface 25, may be 640 × 480, and the effective size may be 0.294 inches.
In one embodiment, the two non-right angles of the second freeform prism 1 are 30 ° and 150 ° (i.e., the angle between 1a and 11 is 30 °, and the angle between 1a and 13 is 150 °). The first free-form surface prisms 24 and 25 have an included angle of 120 °. The cemented prism (i.e., the cemented of the first and second free-form surface prisms) has a first parallel difference of 3 'and a second parallel difference of 5'.
In one embodiment, the lens assembly 110 may act as an aberration correcting lens. The aberration correcting lens includes two aspherical lenses: a first aspheric lens 4 and a second aspheric lens 3, wherein the first aspheric lens 4 is a positive lens and the second aspheric lens 3 is a negative lens.
In an embodiment, parallel light generated by the surface light source passes through the PBS prism, reflects s light, enters Lcos, is modulated by Lcos, emits a p light image, enters the PBS prism again, enters the first aspheric lens 4, and enters the optical system.
In one embodiment, the total length of the optical path from the human eye to the image plane of Lcos is less than 50 mm.
In one embodiment, the aspheric lens and the prism have a surface tolerance PV value of 1um or less, a thickness tolerance of + -0.03 mm, an eccentricity of + -0.03 mm, and a tilt of + -1'.
In one embodiment, the first aspheric lens, the second aspheric lens, the first free-form surface prism and the second free-form surface prism have thickness tolerance of ± 0.02mm or less, tilt and decentration tolerance of ± 0.02mm or less, surface tolerance PV of 1 micron or less, first parallel difference of 3 'or less, second parallel difference of 5' or less, and thickness of the first free-form surface prism of 5mm or less.
In one embodiment, the vertical axis aberration characteristic of the optical system is shown in fig. 3, the field and distortion characteristic is shown in fig. 4, the modulation transfer function MTF is shown in fig. 5, and fig. 3, 4 and 5 are methods for evaluating the imaging quality of the optical system.
The portable wearable projection optical system is simple and compact in structure, few in lens group, small in prism thickness, small in size, light in weight and high in optical imaging quality.
Compared with other wearable projection optical systems, the wearable projection optical system has the advantages that the optical structure is lighter and thinner due to the adoption of the smaller exit pupil and the smaller field angle. And the completely new optical material is adopted, so that clearer imaging quality is obtained. Higher resolution is obtained by using picture elements of smaller size and higher brightness. In principle, different from the complex optical waveguide principle adopted by some wearable projection optical systems at present, the optical projection system based on refraction, reflection and total reflection of light uses the optical principle which is simpler and easier to understand and more essential. And this application has adopted the imaging of three kinds of free-form surface types unique, off-axis, non-axisymmetric and aspheric surface to combine together and correct the aberration simultaneously, for this application pioneering.
It should be understood that the above embodiments are only examples and not limitations, and that those skilled in the art can also conceive of many other similar ways to implement the combination of the virtual image and the external scene. Such implementations should not be read as resulting in a departure from the scope of the present application.
Referring to FIG. 6, an exemplary computer system 600 is shown. Computer system 600 may include a logical processor 602, such as an execution core. Although one logical processor 602 is illustrated, in other embodiments, the computer system 600 may have multiple logical processors, e.g., multiple execution cores per processor substrate, and/or multiple processor substrates, where each processor substrate may have multiple execution cores. As shown, the various computer-readable storage media 610 may be interconnected by one or more system buses that couple the various system components to the logical processor 602. The system bus may be any of several types of bus structures including a memory bus or memory controller, a peripheral bus, and a local bus using any of a variety of bus architectures. In an exemplary embodiment, the computer-readable storage medium 610 may include, for example, Random Access Memory (RAM)604, storage 606 (e.g., an electromechanical hard drive, a solid state hard drive, etc.), firmware 608 (e.g., flash RAM or ROM), and a removable storage device 618 (such as, for example, a CD-ROM, a floppy disk, a DVD, a flash drive, an external storage device, etc.). Those skilled in the art will appreciate that other types of computer-readable storage media can be used, such as magnetic cassettes, flash memory cards, and/or digital video disks. Computer-readable storage media 610 may provide non-volatile and volatile storage of computer-executable instructions 622, data structures, program modules, and other data for computer system 600. A basic input/output system (BIOS)620, containing the basic routines that help to transfer information between elements within computer system 600, such as during start-up, may be stored in firmware 608. A number of programs may be stored on firmware 608, storage device 606, RAM 604, and/or removable storage device 618, and executed by logical processor 602, logical processor 602 including an operating system and/or application programs. Commands and information may be received by computer system 600 through input devices 616, which input devices 616 may include, but are not limited to, a keyboard and a pointing device. Other input devices may include a microphone, joystick, game pad, scanner, or the like. These and other input devices are often connected to the logical processor 602 through a serial port interface that is coupled to the system bus, but may be connected by other interfaces, such as a parallel port, game port, or Universal Serial Bus (USB). A display or other type of display device is also connected to the system bus via an interface, such as a video adapter, which may be part of the graphics processing unit 612 or connected to the graphics processing unit 612. In addition to the display, computers typically include other peripheral output devices, such as speakers and printers (not shown). The exemplary system of FIG. 6 can also include a host adapter, Small Computer System Interface (SCSI) bus, and an external storage device connected to the SCSI bus. The computer system 600 may operate in a networked environment using logical connections to one or more remote computers, such as a remote computer. The remote computer may be another computer, a server, a router, a network PC, a peer device or other common network node, and typically includes many or all of the elements described above relative to the computer system 600. When used in a LAN or WAN networking environment, computer system 600 may be connected to the LAN or WAN through network interface card 614. A network card (NIC)614 (which may be internal or external) may be connected to the system bus. In a networked environment, program modules depicted relative to the computer system 600, or portions thereof, may be stored in the remote memory storage device. It will be appreciated that the network connections described herein are exemplary and other means of establishing a communications link between the computers may be used.
In one or more exemplary embodiments, the functions and processes described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. For a firmware and/or software implementation, the methodologies may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. Any machine-readable medium tangibly embodying instructions may be used in implementing the methodologies described herein. For example, the software codes may be stored in a memory, such as a memory of a mobile station, and executed by a processor, such as a desktop computer, a laptop computer, a server computer, a microprocessor of a mobile device, or the like. The memory may be implemented within the processor or external to the processor. As used herein, the term "memory" refers to any type of long term, short term, volatile, nonvolatile, or other memory and is not to be limited to any particular type of memory or number of memories, or type of media upon which memory is stored.
The foregoing description and drawings are provided by way of illustrative example only. Any reference to claim elements in the singular, for example, using the articles "a," "an," or "the" is not to be construed as limiting the element to the singular. Any reference to source depth, such as "first," "second," etc., as used herein, does not generally limit the number or order of those elements. Reference to first and second elements does not imply that only two elements are used herein, nor that the first element must somehow precede the second element. A set of elements may include one or more elements unless otherwise specified. Skilled artisans may implement the described structure in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the following claims and the principles and novel features disclosed herein.
Claims (8)
1. A wearable optical system comprising:
a display section configured to generate image information; and
an image synthesis section configured to receive light representing the image information from the display section, the light being synthesized with an outside scene via the image synthesis section for viewing by an observer;
the optical system further comprises a lens assembly, the image synthesis part comprises a first free-form surface prism and a second free-form surface prism, light of the image information is guided by the lens assembly and then enters the eyes of the observer through the amplification of the first free-form surface prism and the reflection of the second free-form surface prism, and the external scene is transmitted into the eyes of the observer through the synthesis surface of the first free-form surface prism and the second free-form surface prism; the lens assembly includes a first aspheric lens and a second aspheric lens configured to correct aberrations produced by the first freeform prism magnified image.
2. The optical system of claim 1, wherein:
the first aspheric lens is a rectangular positive lens, the first surface of the first aspheric lens is aspheric, and the second surface of the first aspheric lens is spherical;
the second aspheric lens is a rectangular negative lens, the first surface of the second aspheric lens is aspheric, and the second surface of the second aspheric lens is spherical;
the first free-form surface prism comprises one or more free-form surfaces; the second free-form surface prism comprises an inclined plane which is a free-form surface, and the free-form surface of the second free-form surface prism is plated with a semi-reflecting and semi-transparent film and is glued with one free-form surface of the first free-form surface prism to form the synthetic surface.
3. The optical system of claim 1, wherein: the display part is a self-luminous silicon-based liquid crystal display pixel, and the included angle theta between the emergent light at the edge of the image plane and the normal of the image plane is more than or equal to +/-10 degrees and less than or equal to 150 degrees.
4. The optical system of claim 1, wherein: the first free-form surface prism is a main function magnifying prism, and the first free-form surface prism magnifies and adjusts the image information generated by the display part into parallel light which enters the eyes of the observer.
5. The optical system of claim 2, wherein: the first free-form surface prism comprises three free-form surfaces, and the surface types of the three free-form surfaces of the first free-form surface prism are one of the following: anamorphic aspheres, polynomial surfaces, and biquadratic surfaces.
6. The optical system of claim 3, wherein: the incidence angle relation when the edge light ray on the maximum visual field in the vertical direction intersects with the surfaces of the first free-form surface prism and the second free-form surface prism for two times meets the following relational expression:
wherein theta is1Is the incident angle theta of the edge light ray emitted from the display part for the third time passing through the edge of the first free-form surface prism in the maximum visual field in the vertical direction2The value of n' is the refractive index of the material, and is the incident angle when the marginal ray on the maximum visual field in the vertical direction passes through the second free-form surface prism for the last time.
7. The optical system of claim 1, wherein: the tangent ratio of the horizontal field angle to the vertical field angle of the observer is 16: 9.
8. A wearable device, comprising:
a processor configured to communicate with the display to provide image information to the display;
the display section configured to display image information from the processor; and
an image synthesis section configured to receive light representing the image information from the display section, the light being synthesized with an outside scene via the image synthesis section for viewing by an observer;
the wearable device further comprises a lens assembly, the image synthesis part comprises a first free-form surface prism and a second free-form surface prism, light from the display part and representing the image information is guided by the lens assembly and then enters the eyes of the observer through the amplification of the first free-form surface prism and the reflection of the second free-form surface prism, and the external scene is transmitted into the eyes of the observer through the synthesis surface of the first free-form surface prism and the second free-form surface prism.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108931850A (en) * | 2017-05-26 | 2018-12-04 | 上海真曦通信技术有限公司 | A kind of wearable optical system, device and method |
| CN109656025A (en) * | 2019-01-25 | 2019-04-19 | 杭州历历信息科技有限公司 | Projecting optical device of the augmented reality in conjunction with glasses |
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2017
- 2017-05-26 CN CN201720599902.0U patent/CN207301489U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108931850A (en) * | 2017-05-26 | 2018-12-04 | 上海真曦通信技术有限公司 | A kind of wearable optical system, device and method |
| CN109656025A (en) * | 2019-01-25 | 2019-04-19 | 杭州历历信息科技有限公司 | Projecting optical device of the augmented reality in conjunction with glasses |
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