432results about "Magnifying glasses" patented technology

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 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.

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 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%.

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.

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.

The utility model discloses a soybean hybrid breeding auxiliary mirror image device with amplification function relates to agricultural hybrid breeding technical field, including mirror frame, the inner wall fixed mounting of mirror frame has the lamp ring, the inner wall fixed mounting of lamp ring has the magnifying glass, and the bottom of mirror frame is installed with operation clamp through connecting component, through the mutual cooperation between connecting component, operation clamp, mirror frame and magnifying glass, and the breeding personnel can cover operation clamp on the finger, then will the magnifying glass aim at the flower organ of soybean, and then will the flower organ enlarged presentation, improve the precision of detasseling and pollination, and connecting component can adjust the rotation angle of magnifying glass simultaneously, make magnifying glass aim at the soybean of different height and area, and the suitability is strong.

The embodiment of the present application provides an optical telescopic device and a multi-pupil eyepiece structure, the multi-pupil eyepiece structure comprises a first lens group with positive focal length, a second lens group with negative focal length and a third lens group with positive focal length arranged in sequence from an eye observation position to an imaging surface; the first lens group comprises a first lens for converging light; the second lens group comprises a second lens for compensating spherical aberration caused by the first lens group; the third lens group comprises a third lens with positive focal length and a fourth lens with negative focal length, the third lens is used for converging light, and the fourth lens is used for balancing residual aberration; the first lens, the second lens, the third lens and the fourth lens can meet imaging under different exit pupil conditions in multiple configurations.

The present invention provides an inner-focus type aiming scope and rifle scope in which the focal length of the objective lens system does not change even when the focusing lens group is moved. [Solution] An inner-focus type aiming scope 10 and rifle scope, which have an objective lens system 21 having a fixed lens group 21a fixed from the object side and a focus lens group 21b movable in the optical axis direction Od, are characterized in that the focal length of the fixed lens group 21a is set to infinity, and the incident direction of the light beam Lt incident from the fixed lens group 21a to the focus lens group 21b is parallel to the optical axis direction Od. As a result, the focal length of the objective lens system 21 can be kept constant regardless of the distance to which the focus lens group 21b is moved and focused on, and the scale size of the reticle and the amount of angle change to compensate for the effects of gravity, wind, etc. can be kept constant whether the focus is set to a long distance or a short distance.

An embodiment includes an auto-darkening apparatus for supporting welding performed by a human welder. The auto-darkening apparatus includes a housing configured to be removably installed into a welding helmet. The auto-darkening apparatus also includes an ADF lens assembly configured to transition from an un-darkened state to a darkened state in response to light from an arc being formed between a welding electrode and a work piece during a welding process. The auto-darkening apparatus further includes a magnification assembly integrated with the ADF lens assembly within the housing. The magnification assembly is configured to provide magnification of light coming through the ADF lens assembly. The magnification is continuously user-adjustable from a defined lower level of magnification to a defined upper level of magnification.

An endoscope is disclosed comprising a main body (2), an elongated shaft (3) extending distally from the main body (2), and an eyepiece (4) extending proximal to the main body (2), wherein the eyepiece (4) comprises an eyepiece system tube (13), an eyepiece lens system (12) arranged at least partially within the eyepiece system tube (13), an eyepiece window (16) seated in an eyepiece window frame (17), and a moisture absorption ring (20) arranged between a proximal end of the eyepiece system tube (13) and the eyepiece window frame (17), wherein a tubular elastomeric preloading element (22) is provided between the proximal end of the eyepiece system tube (13) and the moisture absorption ring (20) to preload the moisture absorption ring (20) against the eyepiece window frame (17), wherein the preloading element (22) has a bellows-like section (23) along at least part of its length.

The utility model provides a needleless injector main body and a needleless injector. The needleless injector body includes: a base; the lens is arranged on the side surface of the base; an upper cover mounted on a side surface of the base and provided with a lens receiving hole to receive and expose the lens; wherein the lens comprises a main body and an installation base which is arranged below the main body and extends outwards in the radial direction to exceed the main body, the upper cover comprises a fixing edge which protrudes downwards from the lens containing hole, and when the upper cover is installed on the base, the fixing edge abuts against the installation base.

Rotational alignment apparatus and methods for interchangeable loupe telescope(s) are provided. Some embodiments include an indexing ring including a projection. The ring is fixed to the telescope upon rotational alignment of the telescope. The alignment may involve use of a laser and test fixture. The projection mates with a corresponding indexing notch of a loupe anchoring device. Loupes may comprise one or more anchor assemblies, and one or more interchangeable telescope assemblies. The interchangeable telescope assemblies are held to the anchor assemblies by magnetic attraction between one or more magnets and / or one or more magnetic components affixed to corresponding surfaces of the corresponding assemblies. Mating of the projection with the notch ensures appropriate relative rotational alignment of the assemblies.

Provided is a lens unit that can achieve a reduction in weight of a pair of VR goggles and an improvement in viewability thereof. The lens unit according to an embodiment of the present invention is a lens unit to be used in a display system configured to display an image to a user, the lens unit including: a reflection-type polarizing member configured to reflect light, which has been emitted to a front side from a display surface of a display element configured to display the image, and has passed through a polarizing member and a first λ / 4 member; a first lens portion arranged on an optical path between the display element and the reflection-type polarizing member; a half mirror arranged between the display element and the first lens portion, the half mirror being configured to transmit the light emitted from the display element and to reflect the light reflected by the reflection-type polarizing member toward the reflection-type polarizing member; a second lens portion arranged on the front side of the reflection-type polarizing member; and a retardation member arranged on an optical path between the half mirror and the reflection-type polarizing member, wherein the retardation member includes a first retardation layer, an adhesion layer, and a second retardation layer in the stated order, the first retardation layer or the second retardation layer functions as a second λ / 4 member, and a refractive index n1 of the first retardation layer at a wavelength of 550 nm, a refractive index n0 of the adhesion layer at a wavelength of 550 nm, and a refractive index n2 of the second retardation layer at a wavelength of 550 nm satisfy relationships represented by the following formulae (1) and (2). n1≤n0≤n2 n2−n1<0.13

An optical system and display device, wherein the optical system is a lens assembly including at least two lenses, the at least two lenses comprising a lens assembly including a first surface, a second surface, a third surface and a fourth surface arranged sequentially along the optical axis of the lens assembly, a semi-transparent reflective film installed on one side of the fourth surface away from the third surface, a polarizing reflective layer installed on one side of the third surface away from the fourth surface, a phase delay film located on one side of the fourth surface away from the semi-transparent reflective film, and an adhesive layer including an adhesive layer lens, wherein at least one of the first and second surfaces is a Fresnel surface, and the adhesive layer is bonded between the second surface and the third surface. The adhesive layer bonded between the second surface and the third surface includes an adhesive layer lens, and the adhesive layer lens and the Fresnel surface can refract light rays to correct chromatic aberration, and the light rays do not pass through the Fresnel surface during the reversal process, reducing stray light.

The present invention relates to a portable optical magnification device with a multispectral illumination unit (UV, IR, and white light), an optical magnification unit, and AI-supported analysis for real-time anomaly detection. The device combines magnification, illumination, and augmented reality displays in a modular and ergonomic design. Application areas include medicine (e.g., detection of infected tissue), forensics (e.g., evidence collection), and engineering (e.g., materials testing). The illumination unit enables fluorescent and polarized light analysis, while interchangeable microscope lenses provide flexible magnification. Diagnostic results are processed by AI and visualized in real time within the user's field of vision.

A display optical system configured to enable an image displayed on a display element to be observed includes, in order from a display element side to an observation side, a first lens having positive refractive power, a second lens having positive refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, and a fifth lens having positive refractive power. Each of the first lens, second lens, third lens, fourth lens, and fifth lens is a single lens that is not a cemented lens. A predetermined condition is satisfied.

To provide an eyepiece optical system EL having a large observation magnification and excellent optical performance, and an imaging apparatus having the eyepiece optical system EL.SOLUTION: The eyepiece optical system EL includes, in order from the observation object side, a first lens having a positive refractive power, a second lens having a negative refractive power and having a meniscus lens shape with a concave surface facing the observation object side, a third lens having a positive refractive power, and a fourth lens having a positive refractive power and having a meniscus lens shape with a concave surface facing the observation object side, and satisfies the following conditional expression: 1.38 <fe / f1 <1.651.600 <nd1 <1.800, where fe is a focal distance of the entire system of the ocular optical system EL, f1 is a focal distance of the first lens, and nd1 is an index of refraction of a medium of the first lens with respect to the d-line SELECTED DRAWING: Figure 1

Methods are described for transferring optically active features, such as meta-atoms and diffractive elements formed on a planar surface, to a non-planar surface with high precision. The described methods can be used to fabricate optical devices having meta-atoms or other diffractive features disposed on non-planar surfaces and / or planar surfaces. Related optical systems and components are described.