569 results about "Exit pupil" patented technology

A system for displaying a virtual image (310) to a user comprises a light engine (111) that generates display light (290) representing the virtual image, a diffractive waveguide (335) that focuses a first component light of the generated display light at a first focal distance from an eye of the user and focuses one or more additional component lights of the generated display light at one or more different other focal distances from the eye of the user, and one or more processors (1002) communicatively coupled to the light engine and configured to modify the virtual image to correct for a perceived distortion of at least one of the one or more additional component lights.

The invention relates to an edge display diffraction optical waveguide and a design method and application thereof. The diffraction optical waveguide comprises a coupling-in area, a transition area and a coupling-out area which are sequentially arranged along a light beam transmission path. Wherein a light beam transmission path needs to meet a grating vector closing relation, so that after being totally reflected in the diffraction optical waveguide, a light beam incident from the coupling-in region is emitted through the coupling-out region and is imaged in an edge view field region of the diffraction optical waveguide; the width and height of the out-of-coupling area in the eye head-up field are determined according to the eye movement range, the exit pupil distance and the field area; the range of the coupling-in area is determined according to a preset distance between the coupling-in area and the coupling-out area; the range of the turning region is determined according to a k-vector range from the coupling-in region to the coupling-out region and a k-vector range from the coupling-in region to the turning region. According to the invention, the virtual image is presented in the edge view field area without shielding the central view field area, so that not only can good combination of virtual and real scenes be realized, but also the problems of rainbow lines, light leakage and the like can be well avoided.

The invention belongs to the technical field of telescope manufacturing, and discloses a 20 * 42 telescope system which is characterized in that an objective first lens, an objective second lens, a focusing lens, a semi-pentaprism, a roof prism, a rhombic prism, an eyepiece first lens, an eyepiece second lens, an eyepiece third lens and an eyepiece fourth lens are sequentially arranged in the optical axis direction from the object side to the image side. The visual field of the whole machine is 3.25 degrees, the exit pupil diameter is 2.1 mm, the exit pupil distance is 35 mm, the nearest focusing distance is 8 m, and the image stabilization range is + / -5 degrees.

The utility model discloses an out-of-focus protection desktop far-vision read-write device which comprises a plane spectroscope, a first concave reflector and a second concave reflector. Wherein the light reflected by the table top and an object placed on the table top is emitted to the plane spectroscope from the lower part and then is split; a first light ray formed by reflection of the plane spectroscope is reflected by the first concave reflector, then penetrates through the plane spectroscope and is emitted to an exit pupil position; a second light ray formed after penetrating through the plane spectroscope is reflected by the second concave reflector, is reflected by the plane spectroscope again and then is emitted to an exit pupil position; one of the first light and the second light emitted to the exit pupil position is imaged at a virtual image position not less than 3 meters in front of the exit pupil position, and the other one is imaged at a real image behind the exit pupil position to form positive defocus. According to the out-of-focus protection desktop far-vision read-write device, the coaxial optical system is used, an object placed on a desktop is amplified, projected and imaged, positive out-of-focus stimulation is provided, and myopia prevention and control are achieved.

The invention relates to the technical field of near-to-eye display, in particular to a miniature biprism projection system for a reflection illumination light source and near-to-eye display equipment. The miniature biprism projection system comprises an illumination light source, an image source, a first prism and a second prism, wherein the second prism is arranged between the first prism and the image source; the second prism is used for receiving the illumination light rays output by the illumination light source, reflecting the illumination light rays twice and then emitting the illumination light rays to the image source; the image source reflects the illumination light to form image light, and the image light is refracted by the second prism, then enters the first prism, is reflected twice in the first prism, and then is emitted to the exit pupil position. According to the projection system, the illumination light path and the imaging light path share the second prism, the illumination light is reflected twice by the second prism to the image source, the image light is refracted by the second prism, reflected twice by the first prism and then emitted to the exit pupil position, light path folding is achieved, and the size of the projection system is greatly reduced.

A micro-projection system based on a hybrid refractive-diffractive lens, relating to the technical field of near-eye display devices. A micro-projection lens set sequentially comprises, along an optical axis and from an exit pupil side (6) to an image source side (7), a first lens (1), a second lens (2), a third lens (3), and a fourth lens (4), wherein the first lens (1) is a plano-convex lens and protrudes toward the exit pupil side (6), the second lens (2) is a biconcave lens, the third lens (3) is a meniscus convex lens and protrudes towards the exit pupil side (6), and the fourth lens (4) is a biconvex lens. The first lens (1) has positive focal power, and is used for deflecting large-angle light rays. The second lens (2), the third lens (3), and the fourth lens (4) are cemented by means of an optical adhesive to form a hybrid refractive-diffractive lens; and the cemented surfaces of the second lens (2), the third lens (3), and the fourth lens (4) are each a superposition of an even asphere and a diffractive surface.

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 embodiment of the invention provides an AR light machine module, AR glasses, an AR display system and an AR display method. The AR light machine module comprises a light source, an illumination waveguide, an imaging lens, an LCOS panel, a diaphragm and a polarization control assembly. The light source provides illumination light; the illumination waveguide is provided with an entrance pupil area and an exit pupil area, and the illumination light is coupled in from the entrance pupil area and is coupled out from the exit pupil area; the imaging lens is used for geometrically amplifying the illumination light coupled out of the exit pupil region; the LCOS panel is used for carrying out phase modulation on the amplified illumination light and forming imaging light, and the imaging light is projected to the exit pupil area through the imaging lens and then is emitted; the diaphragm is arranged on an imaging light path emitted by the exit pupil area and is used for adjusting the size of an exit pupil; the polarization control assembly comprises a polarization beam splitting film, and the polarization beam splitting film is located between the exit pupil area and the diaphragm and used for reflecting S-line polarized light and transmitting P-line polarized light.

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 beam of light is directed onto, and scanned across, a controllably-selected portion of a concave-curved light-redirecting surface that provides for redirecting and redistributing the light and illuminating a two-dimensional image-display modulation array. A virtual image of the two-dimensional image-display modulation array is formed by an optical subsystem. Light thereof propagating from an aperture of the optical subsystem is collected onto a subpupil within an exit pupil of the optical subsystem on a surface proximate to an outer surface of an eye location. The subpupil is associated with the controllably-selected portion of the concave-curved light-redirecting surface, and with a corresponding portion less than all of the light of the virtual image that is associated with a gaze direction of the eye when viewing the subpupil. A location of the subpupil within the exit pupil corresponds to a location of the controllably-selected portion on the concave-curved light-redirecting surface.

The utility model belongs to the field of optical display, and particularly relates to a reading system, which comprises a first image source, a second image source, a third image source and a fourth image source, the first concave reflecting mirror is arranged opposite to the first image source; the spectroscope is arranged opposite to the first concave reflector, the light reflected by the first concave reflector enters the spectroscope and is reflected by the spectroscope to be emitted to the exit pupil, and a first image with a first focal plane depth is formed; the second image source emits light rays and is arranged opposite to the spectroscope, and the light rays emitted by the display enter the spectroscope and are reflected by the spectroscope to be emitted out; the second concave reflector is arranged opposite to the spectroscope, the light reflected by the spectroscope enters the second concave reflector, is reflected by the second concave reflector to enter the spectroscope, and is emitted to the exit pupil through the transmission of the spectroscope to form a second image with a second focal plane depth; the first focal plane depth and the second focal plane depth are both greater than 2m.

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 discloses an AR optical waveguide detection system and an AR optical waveguide detection method.The optical waveguide is provided with a coupling-in area and a coupling-out area which are located on the same side, the AR optical waveguide detection system comprises a light source assembly, a projection assembly and an imaging test assembly, the projection assembly comprises a first lens set and an exit pupil end, and the exit pupil end is coupled with the coupling-in area; the imaging test assembly comprises an entrance pupil end, a second lens group and an imaging assembly, and the entrance pupil end is coupled with the coupling-out area; the projection assembly further comprises a first light path turning element which is located in front of the exit pupil end and used for turning light emitted by the first lens group and then enabling the light to enter the coupling-in area, and / or the imaging test assembly further comprises a second light path turning element which is located behind the entrance pupil end and used for turning the light emitted by the second lens group to enter the coupling-in area. And the second lens group is used for reflecting the light emitted from the coupling-out area and then enabling the light to enter the second lens group and the imaging assembly. When the optical waveguide detection system in the embodiment is debugged, structural interference between the projection assembly and the test assembly can be reduced.

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.

The invention discloses a single-side entrance pupil binocular waveguide and AR glasses, and relates to the technical field of augmented reality, and the waveguide specifically comprises a waveguide substrate which is divided into a first substrate and a second substrate along a central axis; the first substrate is provided with an entrance pupil region, a first turning region, a first exit pupil region and a second turning region, the second substrate is provided with a second exit pupil region and a third turning region, and the entrance pupil region, the first turning region, the second turning region, the third turning region, the first exit pupil region and the second exit pupil region all form diffraction gratings; incident light enters through the entrance pupil region, passes through the first transition region, the second transition region and the third transition region and then exits from the second exit pupil region, so that a first optical waveguide path is formed. Wherein the second turning area is used for transferring light rays emitted to the outline notch from the first turning area to the third turning area. By adopting the method and the device, the technical effect that the single-side entrance pupil binocular waveguide can display complete image information in the non-light-source-side eyes of the wearer is achieved.

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 in-couple a set of in-coupled beams (1021); a diffractive exit pupil expansion structure (1300) configured to receive and diffract the set of in-coupled beams (1021) to form a first set of guided beams (1031) and a second set of guided beams (1032); and a diffractive out-coupling structure (1400) configured to receive from the exit pupil expansion structure (1300) a first diffracted set of beams (1041) and a second diffracted set of beams (1042) and to out-couple light from the first diffracted set of beams (1041) and from the second diffracted set of beams (1042).

The embodiment of the invention discloses an eyepiece lens. The eyepiece lens comprises a diaphragm, a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from an observation side to a display side along an optical axis, the first lens is a glass spherical lens with positive focal power, the second lens is a glass spherical lens with positive focal power, the third lens is a glass spherical lens with negative focal power, the fourth lens is a glass spherical lens with negative focal power, and the fifth lens is a glass spherical lens with positive focal power. According to the embodiment of the invention, an all-glass 5G structure is designed and adopted, through matching of lens materials and reasonable distribution of focal power, the eyepiece lens with long exit pupil distance, small distortion, small aberration and low cost is realized, the exit pupil distance reaches 48mm, and the distortion is less than 1.5%.

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 system for displaying a virtual image to a user includes a light engine to generate a display light representing the virtual image, a diffractive waveguide, and an incoupler and outcoupler that are each optically coupled to the diffractive waveguide. In operation, the incoupler receives the display light from the light engine and directs the received display light to the diffractive waveguide, and the outcoupler directs at least a portion of the display light from the diffractive waveguide to an eye of the user. The diffractive waveguide is configured to converge a first component light of the generated display light at a first focal distance from the eye of the user, and to converge one or more additional component lights of the generated display light at one or more distinct other focal distances from the eye of the user.

The invention relates to an optical imaging system and method of a resonant cavity. The system comprises a light source; the emission modulator is in signal connection with the light source; the emission modulator comprises an entrance pupil lens, an exit pupil lens, an electro-optical crystal and a resonant cavity formed between the entrance pupil lens and the exit pupil lens, and the electro-optical crystal is arranged in the resonant cavity; the receiving demodulator is connected to the front end of the imaging module; the receiving demodulator and the transmitting modulator have the same configuration; the microwave generator is respectively in signal connection with the transmitting modulator and the receiving demodulator; the processing module is in signal connection with the microwave generator; and the processing module is also in signal connection with the imaging module and is used for controlling a frame synchronization signal of the imaging module and enabling the imaging module to receive a demodulation signal in an effective time window of microwave optical modulation. The method is applied to the system. According to the invention, the frequency of the emitted light can be modulated to the GHz level, so that the ToF ranging precision can be accurate to the millimeter level, and the ToF ranging precision can be improved.

A head-wearable display device is provided, which includes: a see-through member providing a transparent see-through area; a plurality of more than two display segments to emit sub-image portions of a display image, the plurality of display segments disposed on the see-through member in a manner distributed across a display area of the see-through member, each of the plurality of display segments comprising a plurality of pixel elements, wherein an intra-segment pixel distance is smaller than an inter-segment pixel distance; and a collimating optical system disposed on the see-through member to direct the sub-image portions towards an exit pupil of the display device, wherein the collimating optical system includes, in relation to each of the plurality of display segments, a respective plurality of collimating optical elements each configured to direct the sub-image portion emitted by the associated display segment towards the exit pupil with substantially the same direction.

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 discloses a desktop remote image read-write device with contrast control and a control method thereof. The desktop remote image read-write device comprises a plane spectroscope, a concave reflector and a backlight plate. The light reflected by the desktop and an object placed on the desktop is emitted to the plane spectroscope from the lower part, and the light split by the plane spectroscope is reflected by the concave reflector, is split by the plane spectroscope again, is emitted to an exit pupil position and forms a far image at a position not less than 3 meters; brightness of different areas of the backlight plate is different so as to change contrast of different areas of a far image. According to the desktop far image read-write device, when a user reads characters and other contents in a book, the peripheral low-contrast visual effect is provided, the growth of an eye axis is further inhibited, meanwhile, a certain effect is achieved on thickening of a choroid, and myopia prevention and control are achieved.