737results 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 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.

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.

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.

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.

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.

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.

A visual inspection device and apparatus is disclosed for inspecting fiber ends of a connector by capturing an image of the connector end face, and implementing an image analysis tool for detecting contamination from the captured image. The visual inspection tool includes components for providing a larger field of view to capture the entire connector end face in a single image, and the image analysis tool is able to accurately and efficiently detect contamination from the captured image.

The utility model discloses a visual system, which comprises a lens barrel, and a first lens, a reflective polarizing element, a quarter-wave plate, a second lens, a third lens and a partial reflection element which are assembled in the lens barrel and are sequentially arranged from a first side to a second side along an optical axis, the second lens has positive focal power and a plano-convex surface type, and the second side surface of the third lens is a convex surface; a first spacing element is arranged between the first lens and the second lens, and a second spacing element is arranged between the second lens and the third lens. The curvature radius R1 of the first side face of the first lens and the outer diameter D0s of the end face of the first side of the lens barrel meet the condition that R1 / D0s is larger than or equal to 1.37 and smaller than or equal to 1.80. The outer diameter D1s and the inner diameter d1s of the first side face of the first spacing element and the center thickness CT1 of the first lens meet the condition that (D1s-d1s) / CT1 is larger than or equal to 0.14 and smaller than or equal to 2.04. The axial distance EP01 from the first side end face of the lens barrel to the first side face of the first spacer element, the maximum thickness CP1 of the first spacer element and the axial distance EP12 of the first spacer element and the second spacer element satisfy 0.99 < = (EP01 + CP1) / EP12 < = 2.47.

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°.

The utility model discloses a visual system. The visual system comprises a first lens cone and a second lens cone which are sequentially arranged from a first side to a second side along an optical axis, and a first lens group and a second lens group which are respectively supported on the two lens cones, the first lens group sequentially comprises a first lens, a reflective polarizing element and a quarter-wave plate, and the second lens group sequentially comprises a second lens, a partial reflection element and a third lens; the focal power of the first lens and the second lens is positive, the surface types of the first lens and the third lens are convex and concave-convex respectively, and the second side surface of the second lens is a convex surface; the second lens and the third lens are glued; the second lens group can move along the optical axis to be close to or far away from the display on the second side, so that the system is switched between the first state and the second state; the visual system satisfies the following conditional expressions: 0.33 < = (fz / f23) * (La / Lb) < = 1.10 and 0.75 mmlt; (dbs / dam) * [delta] flt; and the thickness is 1.95 mm.

The present disclosure discloses a virtual reality apparatus, including a first optical system and a second optical system; the first optical system sequentially includes, along a first optical axis from a first side to a second side, a first lens having a positive refractive power, a reflective polarizing element, a quarter wave plate, a second lens and a third lens having a positive refractive power; the second optical system sequentially includes, along a second optical axis from an object side to an image side: a first lens element having a negative refractive power; a second lens element having a negative refractive power; a third lens element having a positive refractive power; a fourth lens element having a positive refractive power; a fifth lens element; a sixth lens element having a negative refractive power; a seventh lens element having a positive refractive power; and an eighth lens element.

Provided is a microprojector optical system comprising: a first lens group, a second lens group, a third lens group, and a fourth lens group which each have a positive refractive index, wherein the configuration of the first lens group and the second lens group and the configuration of the third lens group and the fourth lens group are symmetric with respect to a plane between the second lens group and the third lens group, a first lens surface closest to the display surface side of the first lens group is a convex surface protruding to a display surface, a curvature radius R1 of the first lens surface and a curvature radius R2 of a second lens surface closest to the input side of the first lens group satisfy a predetermined expression, and a focal length f2 of the second lens group and a curvature radius R3 of a third lens surface closest to the display surface side of the second lens group satisfy a predetermined expression.

The utility model provides an eyepiece diopter adjusting mechanism and eyepiece, relates to optical device technical field, diopter adjusting mechanism includes complete machine adapter, eyepiece lens barrel and diopter adjusting piece, complete machine adapter includes annular side wall, the side wall is provided with spacing groove, eyepiece lens barrel is provided in complete machine adapter, and the diopter adjusting piece is provided with spacing groove. Limiting grooves are formed in the eyepiece lens barrel, limiting pieces corresponding to the limiting grooves are arranged on the outer wall of the eyepiece lens barrel, the limiting pieces are arranged in the corresponding limiting grooves in a penetrating mode, the whole machine adapter is sleeved with the diopter adjusting piece, and the diopter adjusting piece is movably connected with the whole machine adapter and is in linkage connection with the limiting pieces which are arranged on the eyepiece lens barrel in a penetrating mode and arranged in the limiting grooves. When the diopter adjusting piece moves, the limiting piece is limited and guided by the limiting groove, and the diopter adjusting piece drives the limiting piece to drive the eyepiece barrel to synchronously move in the whole machine adapter along the axial direction of the whole machine adapter, so that the diopter of the eyepiece is adjusted, and the optical axis of the eyepiece does not rotate in the diopter adjusting process.

The invention relates to the technical field of optical instruments, and provides a dimple telescope system based on a double-phase regulation and control super lens and a design method thereof, and the dimple telescope system comprises an objective lens, an eyepiece, a first super lens and a second super lens. The first super lens is arranged at the imaging plane position of the objective lens, is a local phase modulation type super lens and is used for implementing local phase modulation on an imaging area; and the second super lens is arranged at the pupil entrance plane position of the eyepiece, is a continuous phase type super lens, and is used for performing phase compensation and wavefront matching on the wavefront passing through the eyepiece. According to the invention, the double-phase collaborative design of the image plane local phase modulation superlens and the entrance pupil plane continuous phase compensation superlens is introduced into the Galileo telescope system, so that the unification of local high-resolution fovea imaging in the view field and the stability of the full-view-field image quality is realized on the premise of not changing the original optical path structure; and the aberration interference problem caused by local modulation of a single super lens is avoided.

The utility model relates to the technical field of maintenance devices, in particular to a transducer maintenance device, which is characterized in that a main machine part is used for maintaining a transducer, the main machine part comprises a notch group, the notch group is used for accommodating a magnifying lens, a top cover part is arranged above the notch group, one side of the top cover part is hinged with the main machine part, and the other side of the top cover part is hinged with the transducer. The opposite side is clamped with the host part, the top cover part is used for fixing the magnifying lens in the notch group, and the bearing part is arranged at the bottom of the notch group and used for bearing the magnifying lens; when the top cover part presses the magnifying lens, the bearing part shrinks, the magnifying lens completely enters the notch set and is fixed by the top cover part, the magnifying lens is separated from the outside, and the magnifying lens is prevented from being polluted by dust and the like or scratched by hard objects, scratched, reduced in light transmission and affected in observation effect. And the handle of the magnifying lens is ejected out of the notch group, so that an inspector can conveniently take and observe the appearance of the transducer.

The utility model 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 utility model, 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 invention 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 utility model relates to an eyepiece group, an optical imaging system and an endoscope. The eyepiece group sequentially comprises a fourteenth lens with positive focal power from the object side to the image side along the optical axis, and a fourteenth lens with positive focal power, wherein the image side surface of the fourteenth lens is a convex surface; the fifteenth lens has negative focal power, and the object side surface and the image side surface of the fifteenth lens are concave surfaces; the sixteenth lens has positive focal power, and the object side surface and the image side surface of the sixteenth lens are convex surfaces; the seventeenth lens has negative focal power, and the object side surface and the image side surface of the seventeenth lens are concave surfaces; the eighteenth lens has positive focal power, and the object side surface and the image side surface of the eighteenth lens are convex surfaces; the fourteenth lens, the fifteenth lens, the sixteenth lens, the seventeenth lens and the eighteenth lens are sequentially glued. By using the eyepiece group and the optical imaging system, various aberrations such as distortion and chromatic aberration can be inhibited, so that the imaging resolution and the imaging quality of the endoscope can be improved.

An adjustable binocular lens tube, comprising a connection seat component, an interpupillary distance adjustment sheet (2) connected to the connection seat component, an eyepiece lens tube holder (3) connected to the interpupillary distance adjustment sheet (2), and an eyepiece lens tube component connected to the eyepiece lens tube holder (3), wherein an aperture (100) is formed in the connection seat component, the eyepiece lens tube component is connected to the eyepiece lens tube holder (3) via an adjustment mechanism, the adjustment mechanism comprises an adjustment ring (60) connected to the eyepiece lens tube holder (3) and axially movable relative to the eyepiece lens tube holder (3), the eyepiece lens tube component is connected to the adjustment ring (60), and an optical lens (4) capable of being cut in or out of the aperture is provided in the connection seat component. By adjusting the binocular lens tube during the use of the surgical microscope, a comfortable posture is provided for the doctor, enabling the doctor to always concentrate on high-precision work, meeting the usage needs of different doctors, and working in a posture based on ergonomics to reduce fatigue during the use of the surgical microscope.

An observation optical system includes a display element and an eyepiece lens disposed on an eyepoint side of the display element. The eyepiece lens includes a first lens having positive optical power, a second lens having negative optical power, and a third lens consecutively in order from closest to a display element side to the eyepoint side. In a case where a half value of a longest diameter of a display region in the display element is denoted by H, and a focal length of the eyepiece lens in a state where diopter is −1 diopter is denoted by f, the observation optical system satisfies a conditional expression represented by 0.35<H / f<0.6.

An optical amplification device with a replaceable lens group comprises a supporting unit, a lens bracket unit and a lens group unit. The glasses frame unit is arranged on the supporting unit and comprises two supporting arms and a mounting arm which extends in the left-right direction and is connected with the supporting arms. And the lens group unit comprises an objective lens group arranged on the support arm and an eyepiece group which can be mounted on the mounting arm in a replaceable manner and is opposite to the objective lens group at an interval in the front-back direction. The eyepiece group is provided with a first positioning piece which is detachably connected to the mounting arm; the lens group unit is used for constructing an image of an amplified object, and the image is reflected to an optical path of eyes of a user by the eyepiece group. According to the utility model, the eyepiece group can be replaced according to the use situation, and the use is convenient.

The utility model relates to an anti-loosening eyepiece sleeve, which belongs to the technical field of eyepiece sleeves and comprises an eyepiece connecting sleeve, and a connecting ring is arranged on the left side of the eyepiece connecting sleeve. According to the anti-loosening eyepiece sleeve, the connecting ring can be in threaded connection with equipment to fix the eyepiece connecting sleeve, the eyepiece sleeve body and the threaded ring can be driven to rotate in the eyepiece connecting sleeve by twisting the adjusting ring, and the threaded ring in threaded connection with the interior of the eyepiece connecting sleeve moves left and right in the eyepiece connecting sleeve. Then the eyepiece tube body can be driven to move left and right in the eyepiece connecting tube, so that imaging is clear, and when imaging is clear, a rotating handle can be rotated to drive a semicircular rubber block to move downwards and abut against the upper surface of a fixed tube, so that the eyepiece tube body is limited and fixed in the eyepiece connecting tube; therefore, unclear images caused by loosening of the eyepiece sleeve can be prevented, the structure is simple, and the complexity of production and processing can be reduced.

Disclosed herein are systems and methods for fabricating nanostructures on a substrate that can be used in eyepieces for displays, e.g., in head wearable devices. Fabricating and / or etching such a substrate can include submerging the substrate in a bath and applying ultrasonication to the bath for a first time period. The ultrasonication applied to the first bath can agitate the fluid to provide a substantially uniform first reactive environment across the surface of the substrate. The substrate can be submerged in a second bath and ultrasonication can be applied to the second bath for a second time period. The ultrasonication applied to the second bath can agitate the fluid to provide a substantially uniform second reactive environment across the surface of the substrate. A predetermined amount of material can be removed from the surface of the substrate during the second time period to produce an etched substrate.

One embodiment provides a system and method that combine at least one flat. wide aperture telephoto lens with an objective lens, in the same overall lens structure with any common corrective or tinted eyeglass lens in a frame offering simple adjustability for intraocular distance. The invention thus allows for binoculars with strong telephoto magnification and fine focal detail with no need to adjust proper focus for any viewer's visual acuity, and simple gaze shift to and from telephoto view and any different typical eyeglass lens, all in a common eyeglass form that is lightweight enough and. thin enough for constant comfortable wear. Other embodiments are described herein.

The invention relates to the technical field of medical instruments, and discloses a rotary dermatoscope magnification adjusting ring which comprises an adjusting ring body, a lens body and a connecting ring, the connecting ring sleeves the outer side of the lens body and is in sliding connection with the lens body, and the adjusting ring body rotatably sleeves the outer side of the connecting ring; a plurality of damping grooves are formed in the inner wall of the adjusting ring body in the circumferential direction at intervals, a plurality of connecting pieces are symmetrically and fixedly connected to the surface of the connecting ring, an arc-shaped spring piece is fixedly connected to the surface of each connecting piece, and two damping columns are fixedly connected to the two sides of each arc-shaped spring piece; the damping column elastically abuts against an inner cavity of the damping groove through the elastic acting force of the arc-shaped spring piece to form a gear damping structure, through cooperation of the damping column and the triangular damping groove and the elastic acting force of the arc-shaped spring piece, clear'click 'sound and the sense of lagging are generated in the adjusting process, a clear gear switching signal is provided for a doctor, and the safety of the doctor is improved. The defect that the adjusting ring lacks positioning sensing in the prior art is overcome.