209 results about "Exit pupil" patented technology

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 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°.

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 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 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.

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.

The invention discloses a low-distortion large-magnification all-plastic low-cost eyepiece, and relates to the technical field of lenses, the eyepiece comprises an eyepiece body, the eyepiece body is internally provided with an optical system, the optical system is composed of a diaphragm STO, a first lens, a second lens, a third lens, protective glass and a screen, the first lens, the second lens, the third lens and the protective glass are all made of resin materials, the diaphragm STO is located at the exit pupil position of the eyepiece, the aperture diameter is 3 mm, and the diaphragm STO is used for controlling the clear aperture and the light beam emission angle. The low-distortion large-magnification all-plastic low-cost eyepiece disclosed by the invention has the technical effects of more compact overall design, lighter weight and lower production cost.

The application relates to the technical field of waveguide display, in particular to a single-light-machine binocular diffractive light waveguide and display equipment, which comprises a waveguide substrate, an in-coupling grating, an out-coupling grating and a turning grating. The waveguide substrate is symmetrically provided with a left exit pupil area and a right exit pupil area; the in-coupling grating is arranged in the left exit pupil area; the out-coupling grating is arranged in at least two groups, one group of the out-coupling gratings is arranged in the left exit pupil area, and the other group of the out-coupling gratings is arranged in the right exit pupil area; the turning grating is arranged in the right exit pupil area and is arranged above the out-coupling grating; after incident light is coupled into the waveguide substrate through the in-coupling grating, the incident light can be transmitted to the turning grating and the out-coupling grating in the left exit pupil area. The application has the effect of improving the wearing experience of the display equipment.

The embodiment of the present application provides an optical telescopic device and a multi-pupil eyepiece structure, the multi-pupil eyepiece structure comprises a first lens group with positive focal length, a second lens group with negative focal length and a third lens group with positive focal length arranged in sequence from an eye observation position to an imaging surface; the first lens group comprises a first lens for converging light; the second lens group comprises a second lens for compensating spherical aberration caused by the first lens group; the third lens group comprises a third lens with positive focal length and a fourth lens with negative focal length, the third lens is used for converging light, and the fourth lens is used for balancing residual aberration; the first lens, the second lens, the third lens and the fourth lens can meet imaging under different exit pupil conditions in multiple configurations.

The invention provides a display module of near-to-eye display equipment and the near-to-eye display equipment. The display module comprises an optical waveguide, a projection light machine and a cover plate, the cover plate is located between the optical waveguide and the projection light machine, the cover plate is connected with the projection light machine, the cover plate is arranged in parallel or in an inclined mode relative to the exit pupil plane of the projection light machine, and the cover plate is arranged in parallel or in an inclined mode relative to the optical waveguide. The cover plate in the display module can be used for guaranteeing the waterproof and dustproof effects of the projection ray machine. Moreover, based on the arrangement of the cover plate in the display module, the projection light machine does not need to be annularly bonded on the optical waveguide, so that the light energy loss of the display module of the near-to-eye display equipment can be reduced.

A near-eye ophthalmic simulation device comprising a microdisplay (101), a light source (102) forming an exit pupil (103) at an exit pupil plane (105), to create a projected pattern on viewer's retina (112) appearing at a virtual image plane (109) when the user's pupil (106) substantially coincides with the exit pupil plane (105). A variable focus lens (108) placed to substantially coincide with an optical conjugate plane (111) of exit pupil plane (105), to control the virtual image distance (110) and the virtual image plane (109) location is comprised. Projected pattern carries visual information to simulate post-operative vision, distance whereof independently controllable by the variable focus lens (108).

A directional illuminator for a display apparatus includes a switchable diffuser for tuning a divergence of a light beam illuminating a display panel of the display apparatus. The tunable divergence of the illuminating light beam translates into a tunable exit pupil size at the eyebox of the display apparatus, which may be matched to a pupil size of a user's eye, thus providing a configurable illumination of the eye pupil. A tiltable reflector in an optical path of the illuminating light beam may be used to shift the location of the exit pupil at the eyebox of the display apparatus.

The invention relates to an infrared imaging device (1) comprising: - an imaging system (3), - a measuring system (5) comprising: -- an array of lenses (7) situated in an image plane (9) of the imaging system, and -- an array of photodetectors (11), -- a cryostat (13) configured to cool the array of photodetectors and the array of lenses, each lens (7a, 7b) being associated with a main photodetector (11a, 11b), and each lens being configured to image an exit pupil (14) of the imaging system on an area centred on the main photodetector, the device being configured either in a first configuration, in which a distance separating two centres of adjacent main photodetectors is equal to twice a dimension of a main photodetector, or in a second configuration, in which the distance separating two centres of adjacent main photodetectors is equal to three times the dimension of a main photodetector.

The invention discloses an optical waveguide and an augmented reality display device, relates to the technical field of diffracted light, and discloses the optical waveguide, and the surface corresponding to an exit pupil area of the optical waveguide is provided with a first film layer structure. The first film layer structure forms a differential design by adopting at least one mode of different film layer thicknesses, film layer materials and film layer numbers in at least two space areas. According to the embodiment of the invention, the formation mechanism of the interference pattern of the exit pupil region is destroyed from the source by carrying out regionalized film parameter differentiation design on the first film structure of the exit pupil region, the interference phenomenon observed by human eyes can be effectively inhibited or weakened on the premise of not obviously increasing the light loss of the system, and the overall quality and visual consistency of the displayed image are improved.

Examples of the disclosure relate to optical apparatus for adjusting the size or position of an exit pupil. Example apparatus comprise a light guide configured to receive an input beam of light and provide a first expanded output beam of light and a second expanded output beam of light. The first expanded beam of light is directed in a first direction and the second expanded beam of light is directed in a second direction. The apparatus also comprises at least one optical component, spaced from the light guide, and configured to reflect at least part of the second expanded output beam of light towards the first direction to provide a combined exit pupil. The combined exit pupil comprises the first expanded beam of light and the second expanded beam of light wherein the combined exit pupil comprises a non-overlapping region.

The application relates to near-eye display technology, in particular to a two-dimensional vector holographic grating waveguide and a manufacturing method thereof and an optical waveguide module. The manufacturing method comprises the following steps: obtaining a two-dimensional diffraction efficiency matrix of the two-dimensional vector holographic grating waveguide at different propagation angles according to a formula group provided by the application, then obtaining a diffraction efficiency matrix of two one-dimensional gratings forming the two-dimensional vector holographic grating waveguide, and obtaining exposure energy required for manufacturing the two-dimensional vector holographic grating waveguide according to a linear relationship between the diffraction efficiency of the one-dimensional grating and exposure energy used when the grating is manufactured; and exposing a holographic plate to light by using the exposure energy, so as to obtain the two-dimensional vector holographic grating waveguide. The exposure energy of the two-dimensional vector holographic grating waveguide is optimized, and the optimized two-dimensional vector holographic grating waveguide is obtained. The method optimizes the exit pupil uniformity of the two-dimensional vector holographic grating waveguide, and improves the final eye-entrance display effect of the near-eye device.

Assembly for determining a characteristic of a structure on a substrate, comprising a radiation illumination dipole having first and second sources that are angularly offset to a transverse direction in an illumination pupil plane. The first and second sources irradiate a structure having a periodically repeating pattern along a transverse. A multi-part wedge is located in an exit pupil of the assembly, configured to receive from the structure: a lower radiation order and a higher radiation order of diffracted radiation of the first source on a first part of the multi-part wedge, and a lower radiation order and a higher radiation order of diffracted radiation of the second source on a second part of the multi-part wedge. A detector receives a first and second spatially separated images formed from first and second source radiation incident on the first and second parts of the wedge, respectively.

The utility model discloses an eyepiece capable of adjusting diopter and eyeshade height, and relates to the field of microscopes. The eyepiece comprises an eyepiece seat, an eyeshade is arranged at the upper end of the eyepiece seat, a horn-shaped eye bearing cover is arranged at the upper end of the eyeshade, and the eyeshade is in threaded connection with the eyepiece seat; a diopter focusing ring is sleeved outside the eyeshade in a clearance mode, the diopter focusing ring is fixedly connected with the upper end of a diopter adjusting cylinder installed at the lower end of the diopter focusing ring, the middle of the diopter adjusting cylinder is fixedly connected with the lower end of the eyepiece seat, and the lower portion of the diopter adjusting cylinder is connected with a rear connecting seat through threads. Compared with the prior art, the visual acuity of the eyepiece and the height of the eyeshade can be adjusted, the focal length of the system can be adjusted through the eyepiece with the adjustable visual acuity so as to adapt to the vision difference of different users, and clear imaging can be achieved without wearing glasses; the eyeshade with the adjustable height can help the eyes of the user to keep a proper distance from the eyepiece and ensure that the eyes are within an exit pupil distance range designed by the microscope, and incomplete view or blurred imaging caused by distance deviation is avoided.

Virtual image display device. Reduce the unevenness of the brightness of the displayed virtual image. In the virtual image display device (110), the first exit diffraction grating (541) and the second exit diffraction grating (542) overlap when viewed from the exit pupil (EP), the area of the first exit diffraction grating (541) that exits the first image light (G1) is different from the area of the second exit diffraction grating (542) that exits the second image light (G2), so that a large difference between the optical path from the first display element (31a) to the first exit diffraction grating (541) and the optical path from the second display element (32a) to the second exit diffraction grating (542) can be avoided, and the unevenness of the brightness of the virtual image displayed due to the increase in the brightness difference between the first image light (G1) exiting from the first exit diffraction grating (541) and the second image light (G2) exiting from the second exit diffraction grating (542) can be reduced.

The utility model belongs to the field of optical imaging, concretely relates to a compact optical system, include: first prism, have the first surface of tilt setting, the second surface and the first surface are apart from the predetermined distance between the first surface, and the third surface are set between the first surface and the second surface, second prism have the fourth surface, and the first surface are equipped; The mirror is opposite to the second surface and is set, the side of the mirror is allowed to pass through the light near the first prism, and the side of the mirror reflects the light away from the first prism, first lens group, set in the side of second prism away from the first prism, display, opposite to the third surface and set, the light of display emission is incident on the third surface of first prism, after the reflection of the light film on the first surface to the mirror, after the reflection, again incident on the light film, by the transmission of light film, the refraction of second lens and the refraction of first lens group to the exit pupil and emit, the focal length of compact optical system is less than 56mm, and the exit pupil diameter is greater than 70mm.

Optomechanical relay systems and methods for rapid filter switching are provided. More particularly, optical filter systems and methods that enable one of a plurality of filter elements to be applied to light comprising an entire image or scene collected by an imaging system are provided. The optical filter systems include steering elements at the input and exit pupils of the system. The filter elements are provided as part of a filter array having a location that is fixed relative to the input and exit pupils. The steering element at the input pupil directs the received image towards an area of the fixed filter array in which a filter element that provides the desired filter effect is located. The steering element at the exit pupil directs the filtered light to a receiving system, such as an image sensor.

To determine the imaging quality of the optical system (13) when illuminated by the illumination light (1) within the entrance pupil or exit pupil (11) to be measured, the test structure (5) is initially arranged in the object plane (4) of the optical system (13) and an illumination angular distribution is specified for illuminating the test structure (5) with the illumination light (1). The test structure (5) is illuminated at different distance positions (z m ) of the test structure (5). The intensity I(x, y, z m ) of the illumination light (1) is measured in the image plane (15) of the optical system (13). The spatial image measured in this way is compared with the simulated spatial image, the fitting parameters of the function set used to describe the simulated spatial image are adjusted, and the wavefront of the optical system (13) is determined on the basis of the result of minimizing the difference. The specified illumination angular distribution corresponds to a sub-aperture (10 i ) within the entrance pupil (11) to be measured. For another specified sub-aperture, the steps from "specify" to "determine" are repeated. The wavefront of the optical system is determined by combining the results obtained for the measurement sub-apertures (10 i ) within the entrance pupil (11) to be measured.

An optical system includes a display, a lens assembly, and a multilayer beam shaping film disposed between the lens assembly and the display. The optical system is configured to display a virtual image for viewing at an exit pupil of the optical system. The beam shaping film includes an array of optically transparent lenses arranged two-dimensionally on an opaque layer. The opaque layer defines a plurality of through openings aligned with the lenses. For an image light cone emitted from each position on an image formed by the display, the beam shaping film transmits and shapes the emitted cone such that the transmitted and shaped cone exits the lens assembly as collimated image light having a first integrated energy E1, and passes through and substantially fills the exit pupil, the passed collimated image light having a second integrated energy E2, such that E2 / E1 ≥ 0.2.

The invention provides a transmit-receive module and a laser radar, the transmit-receive module comprises an optical assembly and a protective cover, the protective cover covers the optical assembly, the optical assembly and the protective cover are sequentially arranged along the optical axis of the transmit-receive module, the protective cover is used for transmitting light beams, and the light beams comprise a first light beam and a second light beam, the first light beam corresponds to a first field angle of the transceiver module, the second light beam corresponds to a second field angle of the transceiver module, and the first field angle and the second field angle are symmetrical about an optical axis of the transceiver module; the optical path from the point where the first light beam enters the outer surface of the protective cover to the exit pupil center of the transceiver module is equal to the optical path from the point where the second light beam enters the outer surface of the protective cover to the exit pupil center of the transceiver module. According to the transceiver module, distortion caused by the protective cover can be compensated in advance through the optical assembly, and the optical path difference caused by the protective cover in the light beam incidence process of the two symmetrical view fields is reduced, so that the range finding capability and the assembly flexibility of the laser radar are improved.

This invention discloses a display device, including a projection optical engine and a diffractive waveguide. The diffractive waveguide includes a substrate, an entrance pupil element, a dilator element, and an exit pupil element disposed on the substrate. The projection optical engine is disposed opposite to the entrance pupil element and is used to project a plurality of projection beams into the entrance pupil element. The entrance pupil element includes an entrance pupil grating corresponding to each projection beam, which is used to input the projection beam to the corresponding dilator grating. The dilator element includes a plurality of dilator gratings corresponding to each entrance pupil grating, and the dilator gratings are located on the output optical path of the entrance pupil gratings, used to input the projection beam to the corresponding exit pupil element. Each exit pupil element includes a plurality of exit pupil gratings, and the exit pupil element is located in the overlapping area of ​​the output optical paths of the plurality of dilator gratings, used to couple the projection beams to form an output beam and output it. This invention can achieve the display of color patterns through a single diffractive waveguide, and has the characteristics of being lightweight and having clear colors.

A spatial image simulation method includes the following steps: constructing a DMD-based optical system simulation model; uniformly sampling the angle and intensity of illumination light within the illumination numerical aperture, and selecting a simulation area; for each illumination angle, simulating the complex amplitude distribution of the micromirror in the open state and the complex amplitude distribution of the micromirror in the closed state; obtaining the interference data of the micromirror at the entrance pupil plane for each illumination angle; obtaining the spatial frequency spectrum at the exit pupil plane for each illumination angle; simulating the corresponding light intensity distribution based on the complex amplitude distribution for each illumination angle, and superimposing the light intensities corresponding to all illumination samples to obtain the final light spot result. Based on the actual working scenario of the DMD, and considering that the tilt angle of the DMD micromirrors has a significant impact on its diffraction, the introduction of various tilt-induced phase differences and tilt factors results in more accurate simulation effects.

An imaging element is provided with: a first pixel and a second pixel each having a pair of photoelectric conversion units for receiving light beams passing through different pupil regions of an exit pupil of an optical system, the first pixel and the second pixel outputting a signal for focus detection of the optical system; and a control unit that performs a first control for outputting both a signal of one selected one of the first pixel and the second pixel and a signal of the other selected one of the first pixel and the second pixel, and a second control for outputting both a signal of the other selected one of the first pixel and the second pixel and a signal of the other selected one of the first pixel and the second pixel. And a signal output unit that outputs a signal of the one of the first pixel and the second pixel.