430 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.

Users exploiting near-to-eye (NR2I) displays for augmented reality and / or correction of low vision are typically wearing these NR2I displays for specific tasks or for extended periods of time, potentially all their time awake. Conflicting tradeoffs between user comfort and minimal fatigue and strain during use, ease of attachment, minimizing intrusiveness and aesthetics should be concurrently balanced with providing an optical vision system that provides the user with a wide field of view, high image resolution, and a large exit pupil for eye placement with sufficient eye clearance. Accordingly, embodiments of the invention provide NR2I displays meeting these conflicts whilst also addressing the inherent variations between user in respect of their head dimensions, head and eye geometry, as well as adapting the displayed content to reflect the user's task at-hand, visual defects or degradations, visual focus and intent upon various regions-of-interest within their field of view. Such HMDs providing enhanced user experiences.

An augmented reality (AR) display system includes a light source and a lens element having a waveguide to direct display light from the light source toward a user's eye. The waveguide includes an incoupler (IC) having surface relief gratings (SRGs) in a first region of the waveguide to incouple the display light and a combined exit pupil expander (EPE) and outcoupler (OC) having surface relief gratings at a second region of the waveguide for exit pupil expansion and surface relief gratings at a third region of the waveguide for outcoupling the display light from the waveguide. The second and third regions at least partially overlap laterally relative to the expected position of the user's eye, with the surface relief gratings of the second region being formed on the same or opposite side of the waveguide as the surface relief gratings of the third region.

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.

A virtual image display device includes a display element that emits an image light, a prism on which the image light from the display element is incident, a first mirror that reflect the image light from the prism, a second mirror that reflects the image light reflected by the first mirror, and a third mirror that guides the image light reflected by the second mirror to a position of an exit pupil, wherein the prism includes an incident portion on which image light from the display element is incident, the incident portion includes a first incident region and a second incident region, and a distance from the first incident region to the display element is greater than a distance from the second incident region to the display element.

A projector (10) for an augmented reality or mixed reality headset is disclosed, comprising: an emissive display (20) defining an optical axis (9), configured to provide first supplied light (40); an exit pupil (80) configured to couple the first supplied light into a waveguide for an augmented reality or mixed reality headset, the exit pupil comprising a first region (82); an optical arrangement (60) configured to couple the first supplied light from the emissive display towards the exit pupil; and an absorptive structure (70) at the emissive display arranged to absorb visible light reflected towards the emissive display from the exit pupil; wherein the emissive display is configured to provide the first supplied light to the optical arrangement off-centre with respect to the optical axis so that a first partial reflection (50) of the supplied light is coupled towards and absorbed by the absorptive structure.

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 utility model provides an optical system and optical equipment. The optical system comprises a display screen, a first lens, a second lens and a third lens which are sequentially arranged along an optical axis. A first pancake composite film is arranged on the surface of the side, close to the first lens, of the display screen. The first lens is a convex-concave lens with negative focal power, and a semi-transparent and semi-reflective film is arranged on the surface of one side, close to the display screen, of the first lens. And the second lens is a biconvex lens with positive focal power. The third lens is a plano-convex lens with positive focal power, and a second pancake composite film is arranged on the surface of one side, close to the second lens, of the third lens. And the exit pupil distance of the optical system is 30-40 mm. The optical system and the optical device provided by the utility model have a large object plane and a large exit pupil distance, and can effectively improve the user experience.

A projector design for a microLED augmented reality (AR) display system. The AR display includes a light engine comprising a microLED panel and a set of plates that oscillate out of phase. The system also includes a waveguide with an input coupler (IC) having an entrance pupil. The entrance pupil of the IC is substantially coplanar with the exit pupil of the light engine. This configuration allows for coupling of light from the light engine into the waveguide, enabling the display of augmented reality content. A set of plates are configured to rotate either about a common axis or their individual axes. These rotations may be facilitated by actuators such as voice coils, piezo actuators, or others, each capable of linear or rotary movement. The plates may be either driven individually but synchronized for cohesive operation, or jointly propelled by a shared actuator for collective movement.

A display structure (1000), a display device, and a vehicle are disclosed. The display structure (1000) comprises a waveguide (1100); an in-coupling structure (1200) configured to couple a set of input beams (1020) into the waveguide (1100) as a set of in-coupled beams (1021), a diffractive exit pupil expansion structure (1300) configured to diffract the set of in-coupled beams (1021) to form at least three sets of guided beams (1030), and a diffractive retardation and out-coupling structure (1400) configured to receive from the exit pupil expansion structure (1300) a diffracted set of beams (1035) and comprising an out-coupling grating (1420). The retardation and out-coupling structure (1400) is configured to diffract the diffracted set of beams (1035) to form at least one returning set of beams (1040) guided towards the exit pupil expansion structure (1300).

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°.

Provided is a display module including a display element, and a light-guiding optical device that guides image light emitted from the display element to form an exit pupil, in which the light-guiding optical device is an off-axis optical system. The off-axis optical system includes a first optical surface, a second optical surface, a first light-shielding portion, the first light-shielding portion being formed at the first optical surface, and a second light-shielding portion, the second light-shielding portion being formed at the second optical surface, in which the first light-shielding portion exposes, through a first aperture, a part of the first optical surface, and the second light-shielding portion exposes, through a second aperture, a part of the second optical surface, the first aperture and the second aperture having mutually different shapes.

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.

The utility model discloses a desktop remote image read-write device, which comprises a support, a plane spectroscope and a concave reflector. Wherein the concave reflecting mirror is fixedly arranged on the bracket; the concave reflecting mirror is perpendicular to the visual axis and is arranged at a position far away from human eyes; the plane spectroscope is obliquely arranged close to human eyes, and the included angle between the plane spectroscope and the visual axis ranges from 30 degrees to 60 degrees. Light reflected by the desktop and an object placed on the desktop is emitted to the plane spectroscope from the lower part, is reflected by the plane spectroscope, is emitted to the concave reflector, is reflected by the concave reflector, penetrates through the plane spectroscope, is emitted to an exit pupil position, and is imaged at a position not less than 3 meters. Compared with an off-axis imaging remote lens, the desktop remote image read-write device based on the coaxial Birdbath optical system design has the advantages that a far image which is almost free of distortion and high in definition can be obtained under the condition that a free-form surface is not introduced, meanwhile, the difficulty of machining, assembling and adjusting is reduced, the structure is more stable, and the imaging effect is easier to guarantee.