1580results 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.

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.

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.

Three-light binoculars comprises: a binocular barrel, including a visible-light barrel, an infrared barrel, and a laser window; a core assembly, including a visible-light core assembly, an infrared core assembly, and a laser rangefinder; a system-on-chip board, connected to the visible-light core assembly, the infrared core assembly, and the laser rangefinder respectively, for processing and fusing the visible-light images and the infrared images, and receiving the ranging results; a housing, connected to the binocular barrel at its front end and to an eyepiece system at its rear end, forming a space for accommodating the core assembly and the system-on-chip board; and the eyepiece system, including two eyepieces, each of which is provided with a display in signal connection to the system-on-chip board. The three-light binoculars integrate visible-light imaging, high-sensitivity infrared thermal imaging and laser ranging, which can obtain fusion images containing richer information, meet more stringent application requirements.

The invention provides a visual system, which comprises an element group and a lens cone group, when the diopter of the visual system is from + 2D to-5D, the moving distance delta L of the second element group along the optical axis, the combined focal length fz1 of the reflective polarizing element, the first quarter-wave plate and the first lens, and the combined focal length fz2 of the second lens, the second quarter-wave plate and the polarizing film meet the condition that delta L * (fz1 / fz2) is greater than or equal to 0.90 mm and less than or equal to 1.82 mm; and the maximum thickness Lb from the first side surface of the second lens barrel to the second side surface of the second lens barrel along the direction of the optical axis, the outer diameter Dbs of the first side surface of the second lens barrel and the inner diameter dbs of the first side surface of the second lens barrel meet the condition that Lb / (Dbs-dbs) is more than or equal to 0.56 and less than or equal to 2.36. The problem that smooth zooming and image quality improvement of a visual system in the prior art are difficult to consider at the same time is solved.

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 present application provides an array-type image detection device, including two columns of imaging arrays arranged at intervals along a first direction, each column of the imaging array includes a plurality of imaging modules arranged at intervals along a second direction, each imaging module includes a magnifying lens and an imaging chip arranged in sequence along its optical axis; each imaging module magnifies the image to be detected located in its detection area and images it in its imaging area and is acquired by the imaging chip located in its imaging area; and except for the detection areas located at the head and tail sides of the second direction, each detection area has overlapping parts with other detection areas at both ends along the second direction. The array-type image detection device provided by the present application can effectively solve the problems of low resolution of existing contact image sensors, difficulty in detecting high-resolution images, and detection blind spots when performing magnified detection, and can obtain a clear magnified image of the image to be detected within the full-frame range.

The invention provides a VR visual system, the VR visual system comprises an element group and a lens cone group, the element group sequentially comprises a first element group and a second element group from a first side to a second side along an optical axis of the VR visual system, the second element group can move along the direction of the optical axis, the combined focal length fz1 of the reflective polarizing element, the first quarter-wave plate and the first lens and the inner diameter dam of the second side surface of the first lens barrel meet the condition that fz1 / dam is more than or equal to 1.60 and less than or equal to 2.66; and the outer diameter Dbs of the first side surface of the second lens cone, the inner diameter dbs of the first side surface of the second lens cone and the distance delta L of the second element group moving along the optical axis when the diopter of the VR visual system is from + 2D to-5D meet the following condition: (Dbs-dbs) / delta L is greater than or equal to 2.63 and less than or equal to 7.45. The VR visual system solves the problem that a VR visual system in the prior art is large in diopter adjustment range and is difficult to consider the structural stability at the same time.

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.

The technical scheme belongs to the technical field of nail clippers, and particularly relates to a luminous nail clipper, which comprises a nail clipper main body, a luminous component and a luminous component, the handle is movably arranged at the front end of the nail clipper main body through a lock pin; the splash-proof sleeve assembly is arranged outside the nail clipper main body in a sleeving mode and used for collecting nail chippings; the amplification and illumination assembly is hinged to the front end of the splash-proof sleeve assembly and provided with an illumination lamp used for illuminating a trimming area and an amplification piece used for amplifying the trimming area; wherein the splash-proof sleeve assembly comprises a splash-proof main body, a containing cavity used for containing the nail clipper main body is formed in the splash-proof main body, a splash-proof part is arranged at the front end of the splash-proof main body in a protruding mode, and the splash-proof part is used for shielding the left side and the right side of a knife edge; the splash-proof main body is sleeved with the storage sleeve, the containing cavity is communicated with a containing space of the storage sleeve, and fingernail chippings enter the containing space from the knife edge through the containing cavity.

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.

An optical lens assembly includes, in order from a visual side to an image source side: an optical group including a partial-reflective-partial-transmissive element; and in order from the visual side to the image source side: an absorptive polarizer, a reflective polarizer, a phase retarder, a first lens, a second lens, and a third lens; wherein the partial-reflective-partial-transmissive element is disposed between the first lens and the third lens; at least one of the first lens and the second lens has a positive refractive power; when the focus of the optical lens assembly changes from a near point to a far point, the optical group moves from the image source side to the visual side. The optical lens assembly may become lightweight and have good image quality when satisfying a specific condition.

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.

The utility model discloses an eyepiece disc assembly which comprises an eyepiece disc support, an eyepiece disc and a motor, and the middle part of the eyepiece disc is rotatably connected with the eyepiece disc support; the motor is arranged on the eyepiece disc bracket; the magnet is arranged on the eyepiece disc and rotates along with the eyepiece disc; the Hall sensor is arranged on the eyepiece disc support, and when the eyepiece disc rotates to a preset position, the Hall sensor is aligned with the magnet; the main control board is in communication connection with the motor and the Hall sensor, and when the Hall sensor is aligned with the magnet, the main control board controls the motor to stop. According to the utility model, the Hall sensor is used for monitoring the single-point position of the eyepiece disc, so that step loss accumulation of the motor can be effectively avoided, the cost is low, and the occupied space is small; the single-side eyepiece disc only occupies one pin of the main control board; according to the overturning bat disclosed by the utility model, the lenses can be automatically switched; the motor rotates the eyepiece disc, and the lens switching speed is uniform; and the interpupillary distance can be manually adjusted according to user requirements.

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.

An electronic device may include an optical module with a display and a tunable lens. During operation, the electronic device may gather data and adjust the tunable lens based on the gathered data. The optical module may include a non-adjustable lens element with convex curvature in addition to the tunable lens. The optical module may include a Fresnel lens element in addition to the tunable lens. The optical module may include a catadioptric lens in addition to the tunable lens. The optical module may include a catadioptric lens that includes the tunable lens. The optical module may have a birdbath architecture that includes the tunable lens. The optical module may include a waveguide and the tunable lens may be an adjustable positive bias lens and / or an adjustable negative bias lens.

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.

The invention discloses a large-view-field compact eyepiece lens for near-to-eye display and a near-to-eye display device. The large-view-field compact eyepiece lens comprises an image source, a first optical lens, a second optical lens, a third optical lens, a fourth optical lens and an optical prism, light is emitted from an image source, sequentially penetrates through the first optical lens and then enters the optical prism, and is refracted and reflected by the interior of the optical prism for multiple times: firstly, the light is reflected back to the optical prism through the second surface of the third optical lens, then is reflected by the second surface of the second optical lens, and finally is output through the optical prism and penetrates through the fourth optical lens to be emitted; the optical prism is compact in structure, optical path folding is achieved, and the length of an optical system is effectively shortened. According to the eyepiece lens, the field angle is 50 degrees, the length of an optical system can be shortened by at least 20%, the imaging definition is high, and the structure is compact.

The invention provides a visual system. The visual system comprises an optical element group and a lens barrel assembly, the optical element group sequentially comprises a first lens with positive focal power, a reflective polarization element, a quarter-wave plate, a second lens with positive focal power, a partial reflection element and a third lens with positive focal power from the first side to the second side along the optical axis; the first side surface of the first lens is a convex surface, and the second side surface is a plane; the second side surface of the second lens is a convex surface; the second side surface of the third lens is a convex surface; the lens cone assembly comprises a first lens cone, a second lens cone and a third lens cone, the first lens is arranged in the first lens cone, the second lens is arranged in the second lens cone, and the third lens is arranged in the third lens cone; the position of the first lens on the optical axis relative to the image surface of the second side is fixed, and the distance of the second lens on the optical axis relative to the first lens is adjustable; the visual system satisfies the following conditions: 1.4 lt; (das + dcs) / dbslt; 1.7, 4.7 lt, 1.7, 4.7 lt; lac / [delta] flt; and 6.65.

A scope mount assembly for attaching an optical scope having first and second eyepieces to an electronic accessory having a lens. The scope mount assembly broadly comprises a scope mount and a target attachable to the electronic accessory. The scope mount is configured to engage the first eyepiece. The scope mount includes an aperture for viewing through the first eyepiece when the optical scope is not attached to the electronic accessory and a magnet positioned near the aperture. The target includes a body formed of a structural material and a powder particulate. The powder particulate is distributed throughout the structural material and includes a material configured to be attracted to the magnet. The target is positionable on the electronic accessory so that the second eyepiece aligns with the lens of the electronic accessory when the scope mount magnetically engages the target.

The invention discloses an eyepiece imaging system, which comprises a lens barrel, a first lens group, a second lens group, a third lens group, a plurality of bearing elements and a light source, the first lens group comprises a first lens; the second lens group comprises a second lens; the third lens group comprises a third lens; the first lens, the second lens and the third lens are sequentially arranged from the outer side to the inner side along the optical axis. The plurality of bearing elements includes a first bearing element and a second bearing element. The effective focal length f2 of the second lens, the outer diameter D2m of the inner side face of the second bearing element and the inner diameter d2m of the inner side face of the second bearing element meet the following conditions: 1lt; f22 / (pi * (D2m < 2 >-d2m < 2 >)) lt; 3. By reasonably setting the effective focal length of the second lens and the inner and outer diameters of the second bearing element, the shape of the second lens is effectively controlled, and meanwhile, the bearing element is partially supported on the inner wall of the lens barrel, so that the straight position size is reasonably controlled, the lens assembly process difficulty is reduced, and the assembly process yield is improved.

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.

The present invention relates to an eyepiece optical system and a head-mounted display device. The system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged coaxially and sequentially in an optical axis direction from an observation side of human eyes to a micro-image display, and meeting a certain focal length relationship. The first lens, the third lens, and the fourth lens are positive lenses, the second lens and the fifth lens are negative lenses, and material properties of various lenses meet a certain relationship, which effectively alleviates defects of the prior art, and has a better aberration correction ability and better processability, thereby achieving performance indicators such as large field-of-view angle, low distortion, and high optical resolution, reducing the manufacturing difficulty. The eyepiece optical system of the present invention is suitable for head-mounted displays and similar devices.

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%.

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.