27 results about "Lens thickness" patented technology

This disclosure relates to adjusting the thickness of an initial lens based on determined peripheral thickness or width constraints. The determined constraints identify a target area in the initial lens to be modified. The lens is then modified in this target area to satisfy the determined peripheral constraints.

The utility model discloses an optical lens thickness grinding fixing mechanism which comprises a base, a mounting base is arranged at the top of the base, an adsorption base is fixedly connected to the center of the top of the mounting base, a suction cup is fixedly connected to the center of the adsorption base, and an electric push rod is fixedly connected to the center of the interior of the adsorption base and the center of the interior of the mounting base. The telescopic end of the electric push rod is fixedly connected with a piston, and an air hole is formed in the suction cup. The outer side wall of the adsorption base is sleeved with a movable ring. According to the utility model, the adsorption seat, the movable ring and the locking bolt are mutually matched, the adsorption seat is used for providing suction force and carrying out central positioning on the lens, meanwhile, the lens can be positioned horizontally and is not inclined, and glue is injected on the peripheral side of the bottom surface of the lens, so that the lens can be fixed in an auxiliary gluing manner, and meanwhile, a supporting layer of 1mm can be formed at the bottom of the lens; therefore, the bottom of the lens is stressed in a balanced manner, and the positioning stability of the lens is improved.

The present application relates to the technical field of optical lens detection, and particularly to an optical lens thickness accurate measurement device, comprising a rack, at least one set of placing tables are arranged on the rack to place the to-be-detected lenses; a first adjusting mechanism, the number of the first adjusting mechanism is consistent with the placing tables, each set of the first adjusting mechanism is arranged above the placing table one by one, the first adjusting mechanism comprises a mounting frame mounted on the rack, the mounting frame is slidably connected with a sliding frame, a first driving element is mounted on the mounting frame, the first driving element drives the sliding frame to slide in the vertical direction along the mounting frame, and the sliding frame is fixedly connected with a first mounting element; a second adjusting mechanism, the number of the second adjusting mechanism is consistent with the first adjusting mechanism, each set of the second adjusting mechanism is mounted on the mounting frame of the first adjusting mechanism, the second adjusting mechanism comprises a second mounting element capable of sliding relative to the first mounting element and a second driving element driving the second mounting element; a probe is mounted on the second mounting element, and the present application has the effects of high precision, high efficiency and high safety.

Lens systems for compact digital cameras having a pop-out state and a collapsed state, the lens systems comprising: an image sensor having a sensor diagonal SD, and a lens with N≥6 lens elements L1-LN arranged along a lens optical axis (OA) starting with L1 from an object side toward an image side, each lens element Li having a respective clear aperture diameter DALi 1≤i≤N, and having in the pop-out state a field of view 35deg<FOV<50deg, a f number (f / #), a lens thickness TLens, a back focal length BFL, an effective focal length EFL, and a total track length TTL<20 mm, the lens having in the collapsed state a collapsed total track length c-TTL, wherein c-TTL=TLens+1 mm, wherein EFL≥10 mm, wherein f / #<2, and wherein a ratio c-TTL / EFL<0.8.

The utility model relates to the technical field of optical lens production, and discloses an optical lens thickness detection device which comprises a fixing mechanism, the fixing mechanism comprises a fixing bin, the fixing bin is provided with a measuring mechanism and a lens clamping mechanism, and four sliding grooves are formed in the periphery of the inner bottom wall of the fixing bin at equal angles. The lens clamping mechanism comprises a sliding seat which is connected in the sliding groove in a sliding mode. According to the utility model, the lens clamping mechanism with strong compatibility is designed, namely, a group of clamping block structures are arranged in the fixed bin and comprise four clamping blocks which are arranged in an equal-angle shape, and the synchronous driving mechanism is arranged at the bottom ends of the four clamping blocks and can drive the four clamping blocks to synchronously move towards each other or away from each other; the lens clamping and loosening device can clamp or loosen a lens in the fixing bin, can be matched with a special-shaped lens or a lens with a complex external structure for fixing, ensures that a measuring head can accurately measure along the contour of the lens, and improves the universality of equipment.

The utility model discloses an optical glass lens thickness detection device which comprises a detection table and a fixing frame, a supporting rod is fixedly connected to the center of the upper surface of the detection table, a fixing arm is fixedly connected to the left side of the upper surface of the detection table, and a detection rod is slidably connected to the center of the interior of the upper surface of the fixing arm. The front end of the detection rod is provided with scale marks. One side of the fixing frame is connected with the fixing arm through the adjusting mechanism, the fixing frame is pulled to move through the sliding rod, the fixing frame can drive the lens body in the fixing frame to freely move transversely or longitudinally, at the moment, a detection rod at the top end of the lens body is stressed, and a second spring can be extruded through a connecting disc; the bottom end of the detection rod can be pushed to be attached to the upper surface of the lens main body through the connecting disc due to the counter-acting force of extrusion of the second spring, and the lower surface of the lens main body is effectively supported in cooperation with the supporting rod, so that the thickness of each position of the optical glass lens is efficiently detected.

The invention provides an automatic lens arranging device which comprises a supporting bottom frame arranged at the bottom, a material distributing assembly arranged at the top of the supporting bottom frame and used for distributing materials according to the thickness of lenses, and a plurality of material arranging assemblies arranged at the discharging end of the material distributing assembly. The distributing assembly comprises a conveying belt used for conveying lenses, a discharging belt obliquely arranged on one side of the conveying belt and a plurality of groups of distributing assemblies which are arranged on the two sides of the discharging belt in a staggered mode and used for distributing, and each distributing assembly comprises an intercepting part which is in lap joint with the top of the discharging belt and used for intercepting the lenses and a distributing guide rail which extends out towards the side away from the discharging belt along the intercepting part; the four intercepting parts, in lap joint with the top of the discharging belt, of the material distributing assembly sequentially intercept the lenses, if the thickness of the intercepting part close to the leftmost side of the discharging belt is sequentially increased from the leftmost side to the rightmost side, the lenses with different thicknesses conveyed on the path of the discharging belt can be intercepted and are sequentially guided into the material distributing guide rail into the material distributing assembly, efficient material distributing is achieved, and the production efficiency is improved. And the structural design and the operation mode are simple, and the sheet arrangement accuracy is high.

Provided in the embodiments of the present application are an optical system and an optical display apparatus. The optical system comprises a polarization reflection element, a phase retarder and a light splitting element, which are arranged along the same optical axis, wherein the phase retarder is located between the light splitting element and the polarization reflection element. The optical system further comprises a first lens, wherein the first lens comprises a first surface and a second surface, the light splitting element being arranged on one side of the first surface, and the polarization reflection element and the phase retarder being stacked on the second surface. The first lens satisfies: |SAG / (T*D)|≤0.3, wherein D is the effective clear semi-aperture of the second surface, T is the corresponding lens thickness under the effective clear semi-aperture D, and SAG is the depth of the second surface under the effective clear semi-aperture D.

The utility model relates to the technical field of infrared lens thickness measurement, and discloses a measuring device capable of measuring the center thickness and equal-height edge thickness difference of an infrared lens, which comprises a placing platform for placing a lens to be measured and a thickness measuring assembly for measuring the thickness of the lens to be measured, the thickness measuring assembly is provided with a fixing unit capable of moving on the placing platform and a locking piece located above the fixing unit, the fixing unit is provided with a positioning part used for positioning a to-be-measured lens, and the fixing unit can be pressed on the placing platform through the locking piece. The fixing unit is used for fixing the center or the edge of the to-be-measured lens under the measuring head of the thickness measuring assembly, the fixing unit is moved on the placing platform, and the fixing unit is pressed tightly through the locking piece, so that the center or the edge of the to-be-measured lens can be adjusted to be located under the measuring head fixed on the thickness measuring assembly for thickness measurement, and the thickness of the to-be-measured lens can be accurately measured. The device can measure the center thickness or equal-height edge thickness difference of the to-be-measured lens, and is simple in structure and convenient to operate.

The application discloses an L-band dielectric lens and a lens antenna for satellite multi-beam communication and belongs to the technical field of communication.The lens designed by the application is a cylindrical flat plate lens and is composed of a plurality of concentric circular ring layers.Each circular ring layer is arranged in a circular ring shape around the center by fan ring structure units of the same configuration, and the dielectric constant of each layer gradually decreases from the center to the edge.Compared with a traditional flat plate lens after optical transformation, the lens can realize miniaturization without complex optical transformation, has a simple structure, the lens thickness can be adjusted at will, and the lens can be quickly prepared by using 3D printing.The fan ring structure unit combining the "Y" shape and the circular perforation shape is used as an equivalent dielectric constant model, so that the dielectric constant is closer to the ideal gradient change, and the lens is closer to the ideal effect, so that the lens can be used in the lens antenna, and the working performance is further improved.

The light and thin diopter lens comprises a negative-focal-power lens, film layers used for achieving the light splitting effect are arranged on the surfaces of the two sides of the negative-focal-power lens respectively, environment light enters from the environment side surface of the negative-focal-power lens, is reflected on the human eye side surface and then is reflected on the environment side surface again, and the light splitting effect is achieved. The light is emitted from the side surface of the human eye and finally enters the human eye for imaging; the two side surfaces of the negative focal power lens reflect the ambient light twice, so that part of the ambient light forms the turn-back light path in the negative focal power lens, and the diopter of the vision correction light path comprising the turn-back light path is matched with the vision of human eyes. According to the light and thin type diopter lens, the myopia correction function is achieved mainly through the reflecting surface of the negative-focal-power lens, the thickness of the lens can be greatly reduced, the wearing feeling and attractiveness are improved on the premise that vision correction is guaranteed, and the light and thin type diopter lens is particularly suitable for correction of high myopia of 600 degrees or above.

In some embodiments there are disclosed folded camera modules comprising a lens with 6 lens elements divided into two lens groups G1 and G2 and an effective focal length EFL, an object side-optical path folding element O-OPFE, an image side-optical path folding element I-OPFE and an image sensor, wherein G1 is located at an object side of the O-OPFE and G2 is located at an image side of the O-OPFE, wherein 8 mm<EFL<50 mm, wherein a camera module is divided into a first region having a minimum camera module region height MHM and including G1 and the O-OPFE, and into a second region having a minimum shoulder region height MHS<MHM and including the I-OPFE and the image sensor, wherein an aperture height of the lens is HL and wherein HL / MHS>0.9. In some embodiments, there are disclosed folded camera modules comprising a lens with N=4 lens elements having a lens thickness TLens and a total track length TTL, an I-OPFE and an O-OPFE, wherein the EFL is in the range of 8 mm<EFL<50 mm, and wherein TLens / TTL<0.4.

1. The name of the design product: frequency domain biometry. 2. The use of the design product: for measuring biological parameters of the eye, such as measuring axial length, central corneal thickness, corneal curvature, anterior chamber depth, pupil diameter, white-to-white distance, corneal astigmatism axis, lens thickness, retinal thickness, choroidal thickness, and calculating the power of the artificial lens to be implanted. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The utility model relates to the technical field of lens detection equipment, in particular to a thickness measuring instrument for an optical lens, which comprises a bottom plate, a placement table is fixedly connected to the surface of the bottom plate, an optical lens body is placed on the surface of the placement table, a measuring mechanism is arranged on the surface of the bottom plate, and the measuring mechanism comprises a vertical frame. The vertical frame is fixedly connected to the surface of the bottom plate, and a sliding block is slidably connected to the surface of the vertical frame. According to the measuring mechanism, the digital display dial indicator body is lifted twice, the digital display dial indicator body is quickly lifted firstly and then slowly lifted, so that the lifting efficiency of the digital display dial indicator body is ensured, and the detection accuracy of the digital display dial indicator body is also ensured; the time wasted by the lifting of the digital display dial indicator body is reduced, and the detection efficiency of the thickness measuring instrument is improved.

An optical device (201) comprises a center portion (203) and a reflector portion (204) surrounding the center portion and comprising a reflector surface (205) configured to provide total internal reflection. The center portion comprises a first lens section (206) and a second lens section (207) after the first lens section in a propagation direction of light. A projection of a light ingress surface (208) of the first lens section on a geometric plane (xy) perpendicular to a geometric line (z) through center of mass points of the first and second lens sections is smaller than a corresponding projection of a light ingress surface (210) of the second lens section on the geometric plane. As there are the two successive lens sections, a desired collimation effect can be achieved even if the lens sections are sufficiently thin from the viewpoint of manufacturing.

The utility model discloses a high-precision lens thickness detector, and relates to the technical field of lens detectors. The device comprises an operation table and an adjusting assembly, the top of the operation table is fixedly connected with a placement table, the adjusting assembly comprises two first supporting plates, the corresponding sides of the two first supporting plates are rotationally connected with lead screws, the outer surfaces of the lead screws are in threaded connection with sliding blocks, and the left sides of the first supporting plates are fixedly connected with motors through supporting frames; the right output end of the motor is fixedly connected with the left side of the lead screw. By arranging the adjusting assembly, specifically, the lens is placed on the top of the placing table, the motor is started, the lead screw rotates between the two first supporting plates, the lead screw drives the sliding block to move, and therefore the sliding block drives the detector to move to measure the thicknesses of the lens at different positions, and the problems that an existing lens thickness detector is of a fixed structure and is inconvenient to use are solved. And different positions of the lens are difficult to detect, so that the accuracy of a detection result is influenced.

The invention relates to the technical field of optical lens thickness laser detection, in particular to an optical lens thickness laser detection device and a method thereof.The optical lens thickness laser detection device comprises an equipment outer shell and a laser detection assembly, the laser detection assembly is installed in the equipment outer shell, and a lens track frame is installed in the equipment outer shell; the front face and the back face of the lens track frame are of a groove-shaped structure communicating with the interior, the upper end of the lens track frame extends out of the equipment outer shell, sponge cleaning assemblies are arranged on the inner side of the equipment outer shell and located on the front side and the rear side of the lens track frame, and a material control assembly is installed on the portion, located on the lower sides of the sponge cleaning assemblies, of the lens track frame. The waste water tank is located below the lens track frame and the sponge cleaning assembly. Before the lens moves to a measurement area, the sponge cleaning assembly is controlled by the twisting control assembly to extend into the inner side of the lens track frame, the to-be-detected lens on the inner side is contacted and wiped, and the cleanliness of the lens during detection is guaranteed.

The utility model relates to the technical field of material detection, and discloses an optical coherence tomography technology-based lens thickness measuring device, which comprises a device main body, a tested material placing table arranged below the front end of the device main body, and a lens fixing device arranged above the front end of the device main body and matched with the tested material placing table, a sample arm and a reference arm are arranged at the top end of the equipment body, the sample arm comprises a sample arm incident light adjusting frame matched with the lens fixing device at the top end of the equipment body, and a dichroscope is arranged at one end of the sample arm incident light adjusting frame. According to the utility model, a non-contact measurement mode is adopted, namely, the OCT technology is utilized to realize non-contact measurement of the thickness of the lens, so that potential damage to the surface of a material is avoided, and micron-sized thickness measurement can be realized through the high-resolution OCT technology.

The application discloses an optical lens thickness detection device, and belongs to the technical field of lens detection. In order to solve the problem that the thickness information of a blocked area cannot be accurately obtained due to light path blocking, the application comprises a workbench and an adjusting mechanism. The upper middle part of the workbench is provided with a taking and placing mechanism for automatic material moving. The adjusting mechanism for uniform detection is arranged on the upper side of the taking and placing mechanism. Through the adjusting mechanism, the lens can finally rotate radially in the half ring frame, and then the part of the lens clamped can rotate radially outward, automatic dynamic detection of the lens is realized, all positions of the lens can be detected, including the originally adsorbed and clamped blocked area, so that complete and accurate lens thickness data is obtained, the detection result deviation caused by the missing of partial area data is avoided, and the lens does not need to be clamped for multiple times or a plurality of different detection methods need to be adopted to make up for the detection of the blocked area.

The present application relates to a kind of Marfan syndrome lens subluxation eye equivalent intraocular lens position and intraocular lens power prediction method and system, the prediction method and prediction system are based on equivalent intraocular lens position prediction model and vergence formula not based on anterior chamber depth and lens thickness, obtain the equivalent intraocular lens position of patient, recommended intraocular lens power and postoperative actual refraction and target refraction etc. Data such as the selection of intraocular lens power of patient can be used to guide. The advantage of the present application is that, while considering the postoperative equivalent intraocular lens position of Marfan syndrome patient with different axial length and the postoperative refraction prediction error, based on the biological parameters and gender characteristics of Marfan syndrome patient eye, the precise calculation of intraocular lens power is realized, the postoperative refraction error is effectively reduced, the more ideal postoperative refraction state is reached, so as to improve the satisfaction of patient.

This application discloses a fixture for coating ultra-small lenses. The fixture is a circular plate structure with multiple rings of stepped holes evenly spaced along its circumference for lens insertion. After the lens is inserted into the stepped hole, the fixture surface at the top of the stepped hole is higher than the lens surface. A clamping structure is provided on the fixture to partially expose the sidewall of the lens. This clamping structure consists of clamping grooves corresponding to the fixture surface on both sides of each stepped hole, with the bottom surface of the clamping groove lower than the fixture surface at the top of the stepped hole. The stepped holes on the fixture are higher than the lens thickness, effectively blocking the sidewall of the lens, thus limiting the problem of lens flipping during coating operations and improving the coating quality of ultra-small lenses. Furthermore, the clamping grooves on the fixture, communicating with the stepped holes, facilitate smooth gripping of the lens, such as with tweezers, thereby achieving smooth clamping before coating and smooth removal after coating.

In some embodiments there are disclosed folded camera modules comprising a lens with 6 lens elements divided into two lens groups G1 and G2 and an effective focal length EFL, an object side optical path folding element O-OPFE, an image side-optical path folding element I-OPFE and an image sensor, wherein G1 is located at an object side of the O-OPFE and G2 is located at an image side of the O-OPFE, wherein 8 mm<EFL<50 mm, wherein a camera module is divided into a first region having a minimum camera module region height MHM and including G1 and the O-OPFE, and into a second region having a minimum shoulder region height MHS<MHM and including the I-OPFE and the image sensor, wherein an aperture height of the lens is HL and wherein HL / MHS>0.9. In some embodiments, there are disclosed folded camera modules comprising a lens with N=4 lens elements having a lens thickness TLens and a total track length TTL, an I-OPFE and an O-OPFE, wherein the EFL is in the range of 8 mm<EFL<50 mm, and wherein TLens / TTL<0.4.

The invention provides a full-color optical waveguide display structure, a preparation method thereof and augmented reality display equipment. The structure comprises an optical waveguide body, a coupling-in area, a pupil expanding area and a coupling-out area, wherein the coupling-in area, the pupil expanding area and the coupling-out area are arranged on the surface of the optical waveguide body; the optical waveguide body prepared on the basis of the high-refractive-index material is matched with the coupling-in grating with the asymmetric grating teeth with different duty ratios, RGB light rays with different colors in information light have the same path when being transmitted in the optical waveguide, rainbow pattern interference is avoided, meanwhile, the prism array matched with the coupling-in grating and the coupling-out grating are matched, and the light transmission efficiency is improved. Full-color display based on the single-layer optical waveguide is achieved, the thickness and weight of the lens are effectively reduced, and meanwhile the field angle is increased.

The utility model provides a glass lens wear resistance testing machine which comprises a box body, a rotary driving mechanism is arranged on the box body, the rotary driving mechanism is connected with a product tool used for placing a product, a mounting plate is vertically arranged on the box body, a lifting adjusting mechanism is connected on the mounting plate, and the lifting adjusting mechanism is arranged on the box body. The lifting adjusting mechanism is connected with a force measuring mechanism corresponding to the product tool. Through cooperation of the rotation driving mechanism and the force measuring mechanism, constant rotation speed and friction pressure are realized. Compared with experimental errors caused by non-uniform force and unstable speed in traditional manual operation, the device can significantly improve the accuracy and consistency of test results, greatly reduce the interference of human factors, and improve the test efficiency and reliability. In addition, the height of the force measuring mechanism can be flexibly adjusted according to the thickness of the lens through the arrangement of the lifting adjusting mechanism, and the universality of the equipment is remarkably improved.

Optical photographic lens system comprising a lens tube (LS) and a plurality of lens elements arranged in the lens tube (LS); wherein the total number of multiple lens elements is six, seven, or eight; if the total number of multiple lens elements is six, the multiple lens elements, in order from the object side to the image side along a ray path, are a first lens element (E1), a second lens element (E2), a third lens element (E3), a fourth lens element (E4), a fifth lens element (E5), and a sixth lens element (E6); if the total number of multiple lens elements is seven, the multiple lens elements, in order from the object side to the image side along the ray path, are the first lens element (E1), the second lens element (E2), the third lens element (E3), the fourth lens element (E4), the fifth lens element (E5), the sixth lens element (E6), and a seventh lens element (E7);If the total number of multiple lens elements is eight, the multiple lens elements, in order from the object side to the image side along the beam path, are the first lens element (E1), the second lens element (E2), the third lens element (E3), the fourth lens element (E4), the fifth lens element (E5), the sixth lens element (E6), the seventh lens element (E7), and an eighth lens element (E8); wherein each of the multiple lens elements has an object-side surface oriented towards the object side and an image-side surface oriented towards the image side; wherein at least one of the object-side surface and the image-side surface of at least one lens element of the photographic optical lens system has at least one diffraction point (P);wherein the optical photographic lens system further comprises a light-blocking element (S0) located in the lens tube (LS) and on an object side of the first lens element (E1); wherein the light-blocking element (S0) has an object-side surface (S0_1) oriented towards the object side, an image-side surface (S0_2) oriented towards the image side, and a minimum aperture (S0_3) located between the object-side surface (S0_1) and the image-side surface (S0_2) of the light-blocking element (S0); wherein the lens tube (LS) has a minimum aperture of the lens tube (OP) located on an object side of the minimum aperture (S0_3) of the light-blocking element (S0);where the mean thickness of the first lens element (E1) is CT1, the lens thickness of the first lens element (E1) parallel to the optical axis at a position with maximum effective radius of the minimum aperture (S0_3) of the light-blocking element (S0) is ST1, and the following condition is met: 1.10 <CT1 / ST1<3,00.;

This invention provides a method and apparatus for detecting the center thickness of a multi-lens group lens based on low-coherence detection, belonging to the field of modern optical precision measurement technology. It utilizes a moving guide rail to scan and construct equal-path low-coherence interference fringes to obtain the positions of the front and rear surfaces of each lens. A high-coherence Michelson interferometer is used for phase extraction to obtain the phase difference between the front and rear surfaces of the lens, thus determining the lens thickness. An optical switch is used to construct a switchable forward and reverse measurement structure, and an optical path compensation mechanism is introduced as needed, effectively solving the problem of weak or even missing reflection signals from the rear lenses due to the gradual attenuation of light energy during multi-lens group measurements. This invention employs a non-contact measurement method, which is fast and easy to operate. It is suitable for measuring the center thickness and optical spacing of single lenses and multi-lens groups, possessing good versatility and engineering application value, especially suitable for multi-lens group measurement scenarios with weak reflection signals or large equivalent optical path ranges.

A non-contact optical lens thickness measuring instrument comprises a measuring instrument body, a mounting plate is arranged on the measuring instrument body, two moving plates are symmetrically arranged on the mounting plate, rotating cylinders are rotationally arranged on the opposite sides of the two moving plates, rotating assemblies used for driving the rotating cylinders to rotate are arranged on the moving plates, and the rotating assemblies are arranged on the rotating cylinders. A plurality of bristles are evenly and fixedly arranged on the side, away from the moving plate, of the rotating cylinder, the bristles are of a hollow structure and communicate with the interior of the rotating cylinder, and a blowing assembly used for generating airflow is arranged in the rotating cylinder; when the rotating cylinder rotates, the bristles are driven to sweep dust on the optical lens, meanwhile, the air blowing assembly is linked to generate airflow, and the airflow is guided to the optical lens through the bristles. And the cleaning efficiency and cleanliness of the optical lens are improved, so that the influence of dust on a measurement result is avoided, and the measurement accuracy is improved.