1035results about "Magnifying glasses" patented technology

To achieve the above objective, the present invention provides the following technical solution: a handheld magnifier with an adjustable focal length, comprising an upper shell and a lower shell. The upper shell is equipped with a protection plate, a display screen, and a silicone key, while the lower shell contains a PVC film. A battery, a keyboard, a main board, a wave wheel, a sector gear, a lens assembly, and a light board are installed between the upper and lower shells. The lens assembly consists of an FPC cable, a chip, a guide fixing seat, a roller, a lens holder, a lens cover, and a glass sheet. Manual precise focusing is achieved through a mechanical transmission structure consisting of a wave wheel, sector gear, and spiral groove. This structure provides a wide adjustable range of clarity to accommodate observation needs at different distances.

According to examples, an optical lens assembly for head-mount display (HMD) devices may include an optical lens configuration with a first optical element and a second optical element. The first optical element and the second optical element may be affixed together along a peripheral edge to form a gap between the two optical elements and may compensate chromatic dispersion characteristics. The optical lens configuration may also include a reflective polarizer layer, a quarter wave layer, and a semi-transparent mirror provided on selected surfaces of the optical elements. In some examples, the gap may be filled with air or an inert gas.

The embodiment of the invention provides an eyepiece system and optical equipment. The eyepiece system comprises a first element group and a second element group; the first element group is arranged close to the human eye side and comprises a first lens, the first lens is provided with a first surface close to the display side and a second surface close to the human eye side, the first surface is provided with a light splitting element and a circularly polarized light generation assembly, and the circularly polarized light generation assembly is located on the side, away from the first lens, of the light splitting element; a first phase retarder and a polarization reflection element are sequentially arranged on the second surface; the second element group is arranged close to the display side and comprises at least two lenses, and the Abbe number of at least one lens is less than or equal to 40; the eyepiece system satisfies the following conditions: 0.01 < = (D1max * phi1) / (D2max * phi2) < = 0.3; wherein phi 1 is the focal power of the first element group, phi 2 is the focal power of the second element group, D1 is the maximum effective optical aperture of the first element group, and D2 is the maximum effective optical aperture of the second element group.

The invention discloses an assembly type supporting structure model test device and test method. The test device comprises a model box base and a model box arranged on the model box base. The model box internally comprises a double-row pile supporting structure located on the periphery of the foundation pit and simulation soil bodies arranged on the double-row pile supporting structure and the periphery of the double-row pile supporting structure in a filling mode. Distributed optical fiber sensors are attached to the double-row pile supporting structure, and the distributed optical fiber sensors are connected with an external optical fiber sensing testing system. A plurality of soil pressure boxes which are longitudinally distributed at equal intervals are attached to the double-row pile supporting structure; the device further comprises a plurality of settlement meters arranged in the simulated soil body, a plurality of dewatering wells extending into the bottom of the foundation pit and a plurality of observation wells arranged on the periphery of the foundation pit, each settlement meter is used for monitoring settlement changes of the surface of the simulated soil body, and each dewatering well is connected with an external water suction pump to achieve foundation pit dewatering. The invention aims to realize a foundation pit layer-by-layer rainfall excavation test for simulating the support of an actual assembly type support structure.

A user-wearable examination / visualization / collection system with light enhancement comprising a carrier suitable for the retention of a lighting assembly and a viewing and collection system is presented wherein images or video of objects may be collected under natural (e.g., white) light and / or non-visible light (e.g., IR, UV) conditions, processed and presented to a user on a local display. Further disclosed are lighting assemblies that provide for the light necessary to collect images different lighting conditions and optical filtering that allows for a limitation of the light viewable and collected.

The invention provides a visual system. The visual system can be switched between a first state and a second state; the curvature radius R5 of the first side surface of the third lens, the curvature radius R6 of the second side surface of the third lens and the maximum distance Lb from the first side end surface of the second lens barrel to the second side end surface of the second lens barrel on the optical axis meet the condition that R6 / R5 * Lb is greater than or equal to 0.99 mm and less than or equal to 6.47 mm; the inner diameter dbs of the first side end face of the second lens barrel, the inner diameter dbm of the second side end face of the second lens barrel, and the distance delta L of the second optical element group moving along the optical axis when the visual system is switched between the first state and the second state meet the condition that (dbs-dbm) / delta L is larger than 0.8 and smaller than 2.7. According to the invention, the problem that structural members such as a lens cone of a visual system in the prior art are easy to generate reflection stray light is solved.

The utility model discloses a visual system which comprises a lens cone, a lens group and a spacing element group, wherein the lens group and the spacing element group are assembled in the lens cone; the lens group comprises a first lens with positive focal power, a reflective polarization element, a first quarter-wave plate, a second lens with positive focal power, a third lens with negative focal power, a partial reflection element and a second quarter-wave plate which are sequentially arranged from the first side to the second side along the optical axis. The fourth lens has negative focal power; the spacing element group comprises a first spacing element, a second spacing element, a third spacing element and a fourth spacing element; wherein the number of the lenses with focal power in the lens group is four; the effective focal length f1 of the first lens and the effective focal length f of the visual system satisfy 1.5 lt; f1 / flt; 1.9); the combined focal length FG1 of the first lens, the reflective polarizing element and the first quarter-wave plate and the inner diameter d1s of the first side surface of the first spacing element meet the following conditions: 2.35 lt; fG1 / d1slt, FG1 / d1slt; and 2.75%.

The invention provides a visual system. The visual system comprises a lens cone, a lens group and a spacing element group, the lens group and the spacing element group are arranged in the lens cone, and the lens group is composed of four lenses, a polaroid, a reflective polarizing element, a quarter-wave plate and a reflective element. The four lenses are sequentially a first lens with positive focal power, a second lens with negative focal power, a third lens with negative focal power and a fourth lens with positive focal power from the first side to the second side; f23 / d3s is more than or equal to-9.75 and less than or equal to-8.72; f / (CP1 + EP13) is more than 5.00 and less than 5.40. The problem that stray light is serious due to the fact that a four-piece type visual system in the prior art is provided with a bonding lens and a reflecting part to meet the requirement for structure compactness is solved.

This disclosure describes a wearable display system configured to project light to the eye(s) of a user to display virtual (e.g., augmented reality) image content in a vision field of the user. The system can include light source(s) that output light, spatial light modulator(s) that modulate the light to provide the virtual image content, and an eyepiece configured to convey the modulated light toward the eye(s) of the user. The eyepiece can include waveguide(s) and a plurality of in-coupling optical elements arranged on or in the waveguide(s) to in-couple the modulated light received from the spatial light modulator(s) into the waveguide(s) to be guided toward the user's eye(s). The spatial light modulator(s) may be movable, and / or may include movable components, to direct different portions of the modulated light toward different ones of the in-coupling optical elements at different times.

Embodiments of this disclosure provides systems and methods for displays. In embodiments, a display system includes a frame, an eyepiece coupled to the frame, and a first adhesive bond disposed between the frame and the eyepiece. The eyepiece can include a light input region and a light output region. The first adhesive bond can be disposed along a first portion of a perimeter of the eyepiece, where the first portion of the perimeter of the eyepiece borders the light input region such that the first adhesive bond is configured to maintain a position of the light input region relative to the frame.

A visual optical system comprises a first optical system and a second optical system. The first optical system comprises a first lens having a positive refractive power, a reflective polarizing element, a quarter-wave plate, a second lens having a refractive power and a third lens having a positive refractive power. The second optical system comprises, sequentially along a second optical axis from the first side to the second side, first to sixth lens elements. An effective focal length f3′ of the third lens, a distance TD′ from a first-side surface of the first lens to a second-side surface of the third lens on the first optical axis, an effective focal length f1 of the first lens element and a distance TD from a first-side surface of the first lens element to a second-side surface of the sixth lens element on the second optical axis satisfy: 1.9<(f3′ / TD′) / (|f1| / TD)<5.7.

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.

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.

In one or more embodiments, an optical system may include a first lens, a second lens, and a stack of reflective polarizer and quarter waveplate between the first lens and the second lens. The stack of reflective polarizer and quarter waveplate may be directly on the first lens, and a half mirror lens by the second lens may be a side opposite the first lens.

A visual optical system is provided, including a first optical system and a second optical system, the first optical system sequentially includes: a first element group, a second element group and a third element group, the first element group including a first lens element, a reflective polarizing element and a quarter wave plate; and the second optical system sequentially includes: a first lens, a second lens er, a third lens and a fourth; where, a distance TDm from a first side surface of the first element group to a second side surface of the third element group on the first optical axis and a distance TDe from a first surface of the first lens to a second surface of the fourth lens on the second optical axis satisfy: 5.0<TDm / TDe<15.0.

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

The utility model discloses a binocular telescope. Comprising a first positive-focal-power biconvex objective lens, a second negative-focal-power meniscus objective lens, a third positive-focal-power meniscus objective lens, a fourth negative-focal-power meniscus objective lens, a semi-pentaprism, a roof prism and a first negative-focal-power biconcave objective lens which are sequentially arranged from the object side to the observation side in the optical axis direction. The first lens is a positive-power biconvex eyepiece lens, the second lens is a positive-power biconvex eyepiece lens, the third lens is a positive-power biconvex eyepiece lens, the fourth lens is a negative-power meniscus eyepiece lens, and the fifth lens is a positive-power meniscus eyepiece lens; during focusing, the objective fourth lens moves back and forth along the optical axis direction. The exit pupil diameter of the binocular telescope ranges from 3.5 mm to 4.5 mm, the exit pupil distance ranges from 15 mm to 18 mm, the field angle ranges from 6 degrees to 6.5 degrees, and the binocular telescope has the advantages of being high in resolution, small in chromatic aberration, small in size and light in weight.

The invention provides a double-image-plane long-exit-pupil eyepiece system applied to an OLED, and belongs to the technical field of optical lenses. The double-image-plane long-exit-pupil eyepiece system comprises an OLED assembly serving as a light-emitting component; the flat plate assembly is arranged on the light emitting side of the OLED assembly; the optical lens assembly is arranged on the light path of the light emitting side of the OLED assembly, and the optical lens assembly and the flat plate assembly are arranged at an interval; the eyepiece assembly is arranged on the light path of the light emitting side of the optical lens assembly, and the eyepiece assembly and the optical lens assembly are arranged at an interval; wherein the relative positions of the flat plate assembly, the optical lens assembly and the eyepiece assembly are unchanged; the first image plane is located in the light inlet side direction of the OLED assembly, and the second image plane is located between the optical lens assembly and the eyepiece assembly.

The embodiment of the invention provides an eyepiece system and optical equipment. The eyepiece system comprises a first optical assembly and a second optical assembly which are arranged along the same optical axis. The first optical assembly is located on the eye side, is of a folded light path structure and comprises at least two lenses, a first composite optical film material and a light splitting element, the first composite optical film material comprises a first phase retarder and a polarization reflection element which are arranged in a stacked mode, and the first phase retarder is located between the light splitting element and the polarization reflection element; the second optical assembly is located on the display side, is of a direct light path structure and comprises at least one transmission lens. The eyepiece satisfies the following relational expression: 25 < = (D1 * phi 1-D2 * phi 2) / phi < = 50; wherein D1 is the maximum optical aperture in the first optical assembly, phi 1 is the focal power of the first optical assembly, D2 is the maximum optical aperture in the second optical assembly, phi 2 is the focal power of the second optical assembly, and phi is the focal power of the whole eyepiece system.

The present invention relates to a day-and-night optical sight. The day-and-night optical sight according to the present invention comprises: a housing; an eyepiece lens disposed at one end portion of the housing; an objective lens disposed at the other end portion of the housing; an imaging-display unit including, in a region between the eyepiece lens and the objective lens, an imaging element disposed toward the objective lens and a display element disposed toward the eyepiece lens; a mode switching unit capable of separating the imaging-display unit from a main optical axis between the eyepiece lens and the objective lens in order to select a daytime mode, or putting the imaging-display unit on the main optical axis in order to select a nighttime mode; and an error compensation unit capable of compensating for an optical error due to the thickness of the imaging-display unit between the daytime mode and the nighttime mode. Therefore, provided is the day-and-night optical sight which can select the daytime mode or the nighttime mode according to a use environment, and which compensates for the optical error occurring between the daytime mode and the nighttime mode so as to use the objective lens and the eyepiece lens both day-and-night.

A viewing optics assembly for augmented reality includes a projector configured to generate image light and an eyepiece optically coupled to the projector. The eyepiece includes at least one eyepiece layer comprising a waveguide having a surface, an incoupling grating coupled to the waveguide, and an outcoupling grating coupled to the waveguide. The outcoupling grating comprises a first array of first ridges protruding from the surface of the waveguide, each of the first ridges having a first height in a direction perpendicular to the surface and a first width in a direction parallel to the surface and a plurality of second ridges, each of the plurality of second ridges protruding from a respective first ridge of the first ridges and having a second height and a second width. At least one of the first width or the second width varies as a function of position across the surface.

The invention provides an endoscope imaging system and a hard tube type endoscope, and belongs to the technical field of optical imaging, the endoscope imaging system comprises an objective lens, a relay lens and an ocular lens of an object space telecentric structure, the objective lens comprises a first lens, a second lens, a third lens with positive focal power and a bonding lens group with positive focal power, the second lens is a steering prism, the image side surface and the object side surface of the first lens are aspheric surfaces, the balsaming lens group comprises a fourth lens, a fifth lens and a sixth lens, the fourth lens is a doublet lens, the fifth lens is a triplet lens, the sixth lens is a doublet lens, the relay lens comprises an odd number of rod lens groups which are arranged at intervals, and the rod lens groups are arranged at intervals. The eyepiece comprises a seventh lens, an eighth lens and a ninth lens, and the seventh lens, the eighth lens and the ninth lens are all doublet lenses. By optimizing the structural design of the optical system, the defocusing amount is reduced, seamless switching of visible light and near-infrared light dual-mode imaging can be achieved, and meanwhile high-quality imaging is achieved.

A head mounted display, the head mounted display comprising: (1) an electronic display configured to emit light; and (2) a pancake lens optically coupled to the electronic display, the pancake lens including a beam splitter configured to (A) transmit a spatially averaged portion of the light and (B) reflect an additional spatially averaged portion of the light that is smaller than the spatially averaged portion of the light. Various other apparatuses, devices, systems, and methods are also disclosed.

The invention provides a visual system. The visual system comprises a first lens cone, a second lens cone, a first optical element group supported in the first lens cone, and a second optical element group supported in the second lens cone. The second optical element group is configured to be capable of moving along the optical axis so that the visual system can be switched between the first state and the second state. The effective focal length f3 of the third lens, the inner diameter dbs of the first side end face of the second lens barrel and the inner diameter dbm of the second side end face of the second lens barrel meet the following condition: 0.5 < f3 / (dbs + dbm) < 1.9; the maximum distance Lb between the first side end face of the second lens cone and the second side end face of the second lens cone on the optical axis and the distance delta L of the second optical element group moving along the optical axis when the visual system is switched between the first state and the second state meet the following condition: 1.16 < = Lb / delta L < = 3.10. The problem that a visual system in the prior art is poor in field curvature performance is solved.

A thinness screen magnification display device is provided and includes a processor, a display module electrically connected to the processor and an optical module. The processor is configured to receive an input image and to form an output image to display the output image on the display module. The optical module receives, reflects and magnifies the output image to form a projecting image. The processor extends the input image along the longitudinal direction to form the output image, and by the optical module, the magnifying scale of the output image in the longitudinal direction is greater than the magnifying scale of the output image in the transversal direction so that the aspect ratio of the projecting image is equal to the aspect ratio of the input image. By the two-stage magnification with the different magnifying scales, the size of the displaying device may be miniaturized, but the magnifying scale of the aspect ratio remains the same.

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.

An optical lens assembly includes a middle-lens disposed between, and bonded to, an eye-lens and a display-lens, each of the lenses including an active lens region defined as a maximum lens region configured to transmit an image emitted by a display therethrough. A first at least partially light transmitting film is disposed on, and substantially conforming to, a curved first major surface of the eye-lens. A second at least partially light transmitting film is disposed between, and substantially conforming to each of, a curved second major surface of the eye-lens and a curved first major surface of the middle-lens. A first retarder layer is disposed between, and substantially conforming to each of, a second major surface of the middle-lens and a first major surface of the display-lens; and a third at least partially light transmitting film is disposed on, and substantially conforming to, a curved second major surface of display-lens.

Aspects of the disclosure provide a first lens. The first lens can include an optically transparent member having a first surface and a second surface. The optically transparent member can be configured to receive light from a display device via the first surface. The received light exits the optically transparent member through the second surface. The first surface and the second surface of the optically transparent member can be aspheric. An in inner surface of the first surface is convex, and an outer surface of the first surface is concave. The inner surface is surrounded by the outer surface of the first surface. A thickness of a central region of the first lens can decrease from a center of the first lens, anda thickness of a peripheral region of the first lens can increase from a boundary of the central region.

A microscope assembly includes: a main body with a connector, an analog optical assembly with a monocle having a connector suitable for being removably connected to the connector of the main body for operating in analog mode; a digital optical assembly having a connector suitable for being removably connected to the connector of the main body for operating in digital mode; and a smartphone having a display and a wireless transceiver; the digital optical unit including a camera of digital type with a wireless transmitter configured to communicate with the wireless transceiver of the smartphone, and a holder suitable for holding the smartphone.

An eyepiece unit with optical filters includes a set of waveguide layers including a first waveguide layer and a second waveguide layer. The first waveguide layer is disposed in a first lateral plane and includes a first incoupling diffractive element disposed at a first lateral position, a first waveguide, and a first outcoupling diffractive element. The second waveguide layer is disposed in a second lateral plane adjacent to the first lateral plane and includes a second incoupling diffractive element disposed at a second lateral position, a second waveguide, and a second outcoupling diffractive element. The eyepiece unit also includes a set of optical filters including a first optical filter positioned at the first lateral position and operable to attenuate light outside a first spectral band and a second optical filter positioned at the second lateral position and operable to attenuate light outside a second spectral band.