365 results about "Exit pupil" patented technology

The invention provides a long-exit-pupil-distance broadband common-aperture composite simulation optical system, and belongs to the technical field of target scene composite analog simulation. A broadband objective lens group A, a space beam combiner group B and a long-wave infrared projection lens group D are sequentially arranged in the optical system from left to right along light, a visible light projection lens group C is located on the upper side of the space beam combiner group B, and a long-wave infrared projection lens group C is located on the lower side of the space beam combiner group B; a visible light image plane is positioned on the right side of the visible light projection lens group C; the medium-wave infrared projection lens group E is located on the lower side of the space beam combiner lens group B, the medium-wave infrared image surface is located on the lower side of the medium-wave infrared projection lens group E, the long-wave infrared image surface is located on the right side of the medium-wave infrared image surface, and the exit pupil position is located on the left side of the broadband objective lens group A; the problem that a single-channel target modulo system only adapts to simulation of imaging guidance equipment of a specific wave band and is not suitable for semi-physical simulation tests of three-mode composite imaging guidance equipment and two-mode composite imaging guidance equipment is solved.

The utility model relates to an eyepiece lens, which sequentially comprises a first lens with positive focal power, a second lens with positive focal power, a third lens with negative focal power and a fourth lens with positive focal power along an optical axis from an object side to an image side, the focal length F1 of the first lens and the combined focal length F23 of the second lens and the third lens meet the following relation:-0.99 < = F1 / F23 < = 0.29. The eyepiece lens at least has one of the characteristics of large exit pupil distance, low cost, light weight, small volume, simple structure and the like.

A waveguide includes a first substrate including an exit pupil expander and a second, separate substrate including an outcoupler. The first substrate and the second substrate overlap one another and are separated by a partition element. One or more facets direct light from the first substrate after exit pupil expansion toward the second substrate so that the light can be outcoupled by the outcoupler.

The utility model belongs to the technical field of optics, and particularly relates to a large-magnification infrared beam expanding and focusing lens, which comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged along the propagation direction of a light path, the total length of the large-magnification infrared beam expanding and focusing lens is 110mm, and the distance between the first lens and the second lens is 0mlt; l1lt; 2 mm; the distance between the second lens and the third lens is 23 mlt; l2lt; 25 mm; the distance between the third lens and the fourth lens is 52 mmlt; l3lt; 54mm, 54mm; the full field of view of the large-magnification infrared beam expanding and focusing lens is + / -0.1 degrees, the entrance pupil diameter is 60mm, and the exit pupil diameter is 7.5 mm. The total optical length of the lens is short, the number of the lenses is small, the lens has the 1550 nm wavelength signal transmitting and receiving functions at the same time, and the size and weight of an optical system are reduced; all the lenses adopt standard spherical lenses, so that the development and processing cost is reduced, and the processing, detection and adjustment difficulty of the lenses is reduced.

The invention belongs to the technical field of telescope manufacturing, and discloses a large-view-field telescope optical system which is characterized in that a first objective lens, a second objective lens, a third objective lens, a focusing lens, a semi-pentaprism, a roof prism, a first eyepiece lens, a second eyepiece lens and a third eyepiece lens are sequentially designed from the object side to the image side in the optical axis direction. According to the optical system, only the ten lenses have diopters, the requirement for the field of view of 6.7 degrees under the 8-fold condition is met, and the exit pupil distance reaches 22.6 mm.

The utility model discloses a peripheral out-of-focus lens assembly and glasses, and the assembly comprises a basic lens which generates perspective focal power for perspective light; the single image source is arranged at the edge position of the near-eye side of the basic lens and is far away from the basic lens; the plurality of light splitting surfaces are embedded into the basic lens and are distributed in the basic lens at different inclination angles, and the central normal lines of the plurality of light splitting surfaces are inclined to the side where the image source is located relative to the central normal line of the lens; the light irradiation range of a single image source covers all the light splitting surfaces; each light splitting surface and the shared image source form an out-of-focus unit, each light splitting surface is used for reflecting light rays emitted by the image source to form convergent light rays, the convergent light rays are emitted to an exit pupil position, and an out-of-focus image is formed after the convergent light rays enter human eyes; a plurality of out-of-focus images formed by reflection of the plurality of light splitting surfaces are respectively distributed in a peripheral view field. The peripheral out-of-focus lens assembly and the glasses are used for realizing out-of-focus stimulation, inhibiting eye axis growth and achieving the purpose of preventing and controlling myopia.

The invention relates to the technical field of AR display, in particular to a binocular waveguide, a design method of the binocular waveguide and AR glasses, the binocular waveguide comprises a waveguide substrate, and two exit pupil areas are symmetrically distributed on the waveguide substrate; and a coupling-in grating, a first diffraction element, a second diffraction element, a first coupling-out grating and a second coupling-out grating, the coupling-in grating is arranged on the waveguide substrate, and the first diffraction element and the first coupling-out grating are respectively arranged in one exit pupil area. The second diffraction element and the second coupling-out grating are respectively arranged in the other exit pupil area, and incident light can be respectively transmitted to the first diffraction element and the second diffraction element after being coupled into the waveguide substrate through the coupling-in grating. The application has the effect of improving the wearing experience of the AR equipment.

An eyewear display device expands a field of view by projecting display light at multiple ranges of input angles to a waveguide (600) employing multiple portions of an incoupler (514) or multiple incouplers (514, 414) corresponding to the different angular ranges of display light to guide light to an exit pupil expander (416) configured to receive the display light from the different angular ranges and an outcoupler (608) that are sized to fit within an eyeglasses lens. The display light that is input from the different angular ranges is guided by the incouplers to be overlapped at an exit pupil expander (or, in some embodiments, at multiple exit pupil expanders that are overlaid with each other) to reduce the total ray footprint at the exit pupil expander.

An optical sighting device includes an eyepiece positioned to receive optical radiation along an optical axis to produce a real exit pupil located remote from the eyepiece. The real exit pupil is positioned at an eye relief distance from the eyepiece along the optical axis. A digital signal processor determines an axial distance from the eyepiece to an eye positioned proximate the real exit pupil along the optical axis. An aperture stop is centered along the optical axis to direct the optical radiation in a direction of the eyepiece. The eye relief distance is based at least in part on a position of the aperture stop along the optical axis. The optical sighting device further includes an eye relief actuator to translate the aperture stop along the optical axis to null a spatial offset between the eye relief distance and the axial distance to the eye.

The invention relates to a spectrum detection module and a confocal microscope. The spectrum detection module comprises a dispersion element and a first spectrum splitting device located on a light emitting surface of the dispersion element, the first spectrum splitting device specifically comprises a first imaging lens group, a first slit assembly, a first converging lens group and a first photoelectric detector which are sequentially arranged along a first optical axis from the light emitting surface of the dispersion element; the first slit assembly comprises a pair of first slit halves arranged at intervals in the direction perpendicular to the first optical axis and a first driving piece in driving connection with a first slit plate, and the first slit plate is used for moving in the arrangement direction under the action of the first driving piece. A first variable slit with variable width and / or position is formed on the exit pupil plane of the first imaging lens group, the entrance pupil plane of the first converging lens group coincides with the first variable slit, the first photoelectric detector is located on the exit pupil plane of the first converging lens group, and it can be understood that the arrangement direction is the same as the spectrum expansion direction.

The invention discloses a multi-image-source common exit pupil overlapping display system and method, and belongs to the technical field of optical imaging and display, and the system comprises a multi-image-source module which comprises a plurality of independent image generation sources and is used for providing different types of image information; the image wavefront guiding optical module is arranged behind each path of image source and is used for carrying out collimation, shaping, regulation and control and path guiding on light waves emitted by the multi-image source module and realizing consistent superposition of a plurality of heterogeneous image sources in spatial positions, angles and wavefront parameters at a common exit pupil superposition display surface P; the common exit pupil superposition display surface P is used for carrying out space and time fusion on wavefronts of all image sources to generate a composite image; and the detector module is arranged behind the common exit pupil superposition display surface and is used for receiving the fused composite image wavefront and converting the fused composite image wavefront into image data to be output. According to the system and the method, high-uniformity, high-resolution, high-dynamic-range and multispectral large-depth-of-field fusion imaging can be realized, so that higher requirements of modern simulators, visual systems and multidimensional sensing equipment on imaging quality and system performance are met.

The present application relates to a resonant cavity optical imaging system and method. The system includes: a light source; an emission modulator connected to the light source signal; the emission modulator includes an entrance pupil lens, an exit pupil lens, an electro-optical crystal, and a resonant cavity formed between the entrance and exit pupil lenses, with the electro-optical crystal disposed within the resonant cavity; an imaging module and a receiving demodulator connected to the front end of the imaging module; the receiving demodulator has the same configuration as the emission modulator; a microwave generator connected to the emission modulator and receiving demodulator signals, respectively; a processing module connected to the microwave generator signal; the processing module is also connected to the imaging module signal and is used to control the imaging module's frame synchronization signal so that the imaging module receives the demodulated signal within the effective time window of microwave optical modulation. The method is applied to the above-mentioned system. The present application can modulate the frequency of the emitted light to the GHz level, thereby reducing the ToF ranging accuracy to the millimeter level, thereby improving the ToF ranging accuracy.

A support arm assembly for a head-worn device provides radio frequency (RF) shielding for a projector. A metal support arm, configured to structurally attach to a rear structural element and an optical element holder of the head-worn device, forms a rear face, a bottom face, and a top face of an enclosure. A metal front face of the enclosure attaches to the optical element holder, and defines a front aperture for permitting passage of light from an exit pupil of the projector toward an input optical element. The metal support arm forms a structural support joining the optical element holder to the rear structural element without placing mechanical load on the projector. A first side face of the enclosure and a second side face of the enclosure are electrically coupled to the metal support arm.

The invention discloses a brightness extraction method, electronic equipment, a storage medium and a program product, and relates to the technical field of near-to-eye display, and the method comprises the steps: when an instruction of carrying out the brightness extraction of a display screen of near-to-eye display equipment through a target camera is detected; the mapping relation between camera pixels of a target camera and screen pixels of the display screen is determined, and the target camera is located at an exit pupil frame of the near-eye display device; displaying the calibration brightness image on a display screen, and shooting through a target camera to obtain a calibration brightness camera image corresponding to the calibration brightness image; and based on the mapping relationship, extracting brightness information corresponding to each screen pixel on the display screen from the calibrated brightness camera image. According to the invention, under the condition that the camera image is seriously distorted due to distortion of the optical system, the accurate brightness information completely matched with the original pixel distribution of the screen can be reliably and efficiently obtained.

An optical system of binoculars includes a first object biconvex lens of positive focal power, a second object meniscus lens of negative focal power, a third object meniscus lens of positive focal power, a fourth object meniscus lens of negative focal power, a half pentaprism, a roof prism, a first eyepiece biconcave lens of negative focal power, a second eyepiece biconvex lens of positive focal power, a third eyepiece biconvex lens of positive focal power, a fourth eyepiece meniscus lens of negative focal power, and a fifth eyepiece meniscus lens of positive focal power. These are sequentially arranged along an optical axis direction from an object side to an observation side. When focusing, the fourth object lens moves along the optical axis direction. The binoculars include an exit pupil diameter range of 3.5 mm-4.5 mm, an exit pupil distance range of 15-18 mm, and a field angle range of 6°-6.5°.

Embodiments of techniques presented herein facilitate more optimal positioning of an incoupler and exit pupil expander within an eyeglass-type near-eye display system that includes an optical waveguide combiner. In certain embodiments, the optical waveguide combiner comprises an incoupler; an outcoupler; an exit pupil expander that comprises one or more reflective facets and is disposed in an optical path between the incoupler and the outcoupler; and an offset reflector facet disposed in the optical path between the incoupler and the exit pupil expander.

The invention discloses an exit pupil discontinuity optimization method and system based on an optical waveguide system, and the method comprises the steps: extracting a light propagation path and an exit pupil coordinate through building an optical waveguide one-dimensional and two-dimensional pupil expansion exit pupil mapping model; constructing quantitative evaluation indexes of the jump width, the Eyebox connectivity rate and the blind area; by optimizing the waveguide thickness, the entrance pupil width or area and the grating diffraction angle, the jump deviation is minimized; furthermore, staggered arrangement, inclined expansion or cross design is adopted in the two-dimensional pupil expansion structure, and exit pupil energy connectivity and uniformity are improved. And finally, through non-sequence ray tracing and least square error optimization, continuous and uniform exit pupil distribution of the Eyebox region is realized. The method is suitable for various optical waveguide design structures, has high flexibility and expansibility, and can remarkably improve exit pupil quality and visual experience of augmented reality and mixed reality display systems.

A waveguide includes an incoupler to incouple light beams into the waveguide, an exit pupil expander to receive a first portion of the incoupled light beams and redirect the first portion of the incoupled light beams to an outcoupler, and an outcoupler to receive the redirected first portion of the incoupled light beams and outcouple the redirected first portion of the incoupled light beams from the waveguide. The outcoupler includes a section that receives a second portion of the incoupled light beams and redirects the second portion of the incoupled light beams to the exit pupil expander, and the exit pupil expander includes a section that receives the redirected second portion of the incoupled light beams and outcouples the redirected second portion of the incoupled light beams from the waveguide.

An optical waveguide device and a preparation method therefor, and a near-eye display device. The optical waveguide device (1) comprises at least one optical waveguide (10). The optical waveguide (10) comprises: a waveguide sheet (11), which is used for making light beams transmit in the waveguide sheet (11) in a total reflection manner, wherein the waveguide sheet (11) has a coupling-in region (B) and at least two coupling-out regions (A); a coupling-in grating (12), which is arranged in the coupling-in region (B) and is used for coupling the light beams into the waveguide sheet (11); and at least two coupling-out gratings (13), which are correspondingly arranged in the at least two coupling-out regions (A) on a one-to-one basis, and are used for coupling out the light beams, which are transmitted in the waveguide sheet (11) in a total reflection manner, wherein the light intensities of the light beams coupled out by the at least two coupling-out gratings (13) are identical. The present application can improve the exit pupil uniformity of the optical waveguide device (1), thereby improving the visual experience of users, and also reducing the research and development costs incurred by the use of masks and the impact caused by diffraction effects.

The invention belongs to the technical field of polarization optics, and particularly relates to a metasurface and a polarization aberration compensation method based on refraction-metasurface hybrid design, and the method comprises the steps: S1, obtaining a to-be-compensated optical system; s2, performing parameter scanning on the metasurface; s3, obtaining a target phase of the metasurface; s4, obtaining two-direction attenuation and phase delay distribution of the polarization aberration at the exit pupil of the optical system to be compensated; s5, enabling the polarization aberration compensation function to carry out bidirectional attenuation compensation and phase delay compensation on the optical system to be compensated; s6, judging whether the bidirectional attenuation compensation result and the phase delay compensation result meet respective preset values or not; s7, analyzing wavefront phase distribution introduced by the anisotropic unit structure; and S8, enabling the sum of the phase of the isotropic unit structure and the phase of the anisotropic unit structure to be equal to the target phase of the metasurface. The invention provides an optical system polarization aberration compensation method with high applicability and high degree of freedom.

Illumination optics for projector systems having a high f-number light output. One projection system comprises a fiber input providing a first light, and a first illumination optics configured to alter the first light into a second light. The projection system comprises a Fourier lens assembly configured to receive the second light and to form a Fourier transform of the second light at an exit pupil of the Fourier lens assembly. The second light has a f-number between f / 10 and f / 30, the second light has a luminance uniformity between 75% and 90% of center, and the second light has a contrast over 10,000:1.

Provided in the present application are an exposure parameter determination method and apparatus for a volume holographic grating, and a two-dimensional exit pupil expansion volume holographic optical waveguide. The method comprises: when the wavelengths of a first light beam and a second light beam are a first recording wavelength, rotating a vector of the first light beam, a vector of the second light beam, and a holographic photosensitive material multiple times, so as to obtain rotated vectors of the first light beam and the second light beam, and a rotated material position of the holographic photosensitive material; shifting the wavelengths of the first light beam and the second light beam to a second recording wavelength, and rotating at least once the rotated vectors of the first light beam and the second light beam, so as to obtain in-material vectors of the first light beam and the second light beam; on the basis of the in-material vectors of the first light beam and the second light beam, determining in-air vectors of the first light beam and the second light beam; and on the basis of the in-air vectors of the first light beam and the second light beam, determining the incident angles of the first light beam and the second light beam. The method can improve the manufacturing efficiency of a two-dimensional exit pupil expansion volume holographic optical waveguide including coupling-in, turning and coupling-out volume holographic gratings.

The invention discloses an off-axis catadioptric miniature projection optical lens group suitable for near-to-eye display of a one-dimensional waveguide, which comprises an optical prism and an optical lens which are sequentially arranged from an exit pupil position side to an image source side, and is characterized in that image light emitted by an image source is propagated to the exit pupil position through the optical lens and the optical prism; according to the projection optical lens group provided by the invention, the optical prism and the optical lens are preferably selected to be in a free-form surface form, so that the size and the weight of the whole device are more suitable for the whole integrated glasses form of a waveguide system, and the size and the weight of the whole device are more suitable for the whole integrated glasses form of the waveguide system. The earphone is more suitable for daily wearing and use.

The invention relates to the technical field of near-to-eye display, and provides a near-to-eye display method and near-to-eye display device.According to the method, a high-resolution original electronic image is generated through a micro display screen, accurate information content is provided for a user, and the quality and definition of an information source are ensured. The collimating projection lens converts divergent light of the micro display screen into parallel light beams, disordered scattering of light is reduced, and images of the micro display screen are imaged at an infinite distance after passing through the collimating lens. Parallel light beams are directionally regulated and controlled through micro-structure devices such as a micro-cube-corner prism array or an orthogonal reflector array, the parallel light beams are converged to a small-size exit pupil area, on-demand display of image information is achieved, an image can be seen only when the sight line of a user is aligned, and therefore continuous interference of the information on the normal view field of the user is avoided, and the user experience is improved. The comfort and concentration degree of visual experience are improved, the information transmission effect is optimized, and more natural, comfortable and efficient man-machine interaction experience is provided for near-eye display equipment.

The invention discloses a free-form surface imaging aberration propagation calculation and aberration control method. According to the method, on the basis of a given system light path, an object plane, an image plane, an entrance pupil and an exit pupil of each optical curved surface are calculated, and reference wave surfaces of a central view field at the entrance pupil and the exit pupil are calculated. A group of characteristic light is generated by an entrance pupil and a field of view of the sampling system, the optical path difference of the characteristic light of each field of view propagating from the entrance pupil of each curved surface to the exit pupil relative to the main light is calculated, and the aberration field of each curved surface is obtained by fitting the optical path difference of the full field of view; determining the contribution of each curved surface to the dominant aberration according to the dominant aberration of the current system and the aberration field of each curved surface, thereby determining the curved surface which is optimized first; the aberration is reduced by optimizing the curved surface parameters, corresponding to the current dominant aberration, of the curved surface, and the process is repeated until the design meets the requirements. The method can effectively guide the optimization of the free-form surface imaging system, reduces the deviation degree of the free-form surface while guaranteeing the imaging performance, and effectively reduces the processing and detection difficulty of the surface.

The HMD comprises a head-mountable frame and an optical projection assembly supported by the frame. The optical projection assembly comprises a microdisplay supported by the frame. The microdisplay has a two-dimensional array of pixels. Each pixel contains a group of emitters configured to emit image light. The microdisplay further comprises a projection optical system configured to receive image light from each group of emitters in the array of pixels at the entrance pupil and project the focused image light from the exit pupil. The microdisplay further comprises a two-dimensional array of optical collimators positioned between the microdisplay and the projection optical system. The steerable optical collimators are further configured to redirect the emission profiles of the corresponding groups of emitters toward the center of the entrance pupil of the projection optical system.

The invention relates to a calibration device and a calibration method of a low-altitude target early warning detection system, and belongs to the technical field of equipment calibration, the calibration device of the low-altitude target early warning detection system comprises a visible light sighting telescope and an electronic eyepiece which are fixed on radar equipment, the electronic eyepiece is arranged at the exit pupil position of the visible light sighting telescope, and the electronic eyepiece is connected with the visible light sighting telescope. The image acquisition module is used for acquiring analog images acquired by the visible light sighting telescope based on the eyepiece and converting the analog images into digital images; the processor is in communication connection with the electronic eyepiece and is used for acquiring the azimuth angle of the first servo motor; the pitching angle of the visible light sighting telescope is controlled to the target angle; acquiring an azimuth angle of a second servo motor; and based on the azimuth angle of the first servo motor, the azimuth angle of the second servo motor and the target angle, carrying out space consistency calibration on the radar equipment and the photoelectric equipment. According to the invention, the calibration complexity of the low-altitude target early warning detection system is effectively reduced, and the calibration efficiency is improved.

An eyepiece waveguide for an augmented reality display system may include a transparent substrate, an input coupling grating (ICG) region, a multi-directional pupil expander (MPE) region, and an exit pupil expander (EPE) region. The ICG region may receive an input light beam and couple the input light beam into the substrate as a guided light beam. The MPE region may include a plurality of diffraction features that exhibit periodicity along at least a first periodic axis and a second periodic axis. The MPE region may be positioned to receive the guided light beam from the ICG region and diffract the guided light beam in multiple directions to generate a plurality of diffracted light beams. The EPE region may be positioned to receive one or more diffracted light beams from the MPE region and couple the diffracted light beams out of the transparent substrate as output light beams.

A microscope for imaging a sample by a transmitted light contrasting method includes an objective lens holder configured to place an objective lens of a number of objective lenses onto an optical axis of the microscope. The microscope further includes a lens system for forming an intermediate image of an exit pupil of any one of the number of objective lenses placed onto the optical axis. The intermediate image is formed at a respective conjugated plane conjugate to the exit pupil. The microscope further includes a control device configured for automatically positioning a modulation element onto the optical axis at a positon related to the respective conjugated plane.

The utility model discloses an optical machine module and a near-to-eye display device. A lighting assembly and a lighting and imaging multiplexing assembly of the optical machine module are located on the two sides of a waveguide sheet. Illuminating light emitted by the illuminating assembly is transmitted in the first direction, transmitted through the waveguide sheet, the fly-eye lens, the first polaroid and the lens set in sequence, then incident to the surface, close to one side of the lens set, of the light modulator and modulated into imaging light through the light modulator to be reflected, and the imaging light is transmitted through the lens set and the second polaroid in the second direction and then emitted to the other side of the light modulator. And after total reflection transmission in the waveguide sheet, the light is emitted from the exit pupil area of the waveguide sheet to the human eyes, and the included angles between the first direction and the normal of the light modulator and between the second direction and the normal of the light modulator are the same. According to the optical machine module provided by the utility model, the volume of the optical machine module can be reduced on the premise of ensuring the performance of the optical machine.