93 results about "Thin lens" patented technology

A thin lens consists of a first optical element which comprises a first refracting surface, wherein incoming light passes through the first refracting surface on a first optical axis. A reflecting surface changes a direction of the incoming light from the first optical axis to a second optical axis. Incoming light on the second optical axis passes through a second refracting surface. A second optical element comprises a first refracting surface, wherein incoming light passes through the first refracting surface on the second optical axis. A reflecting surface changes a direction of the incoming light from the second optical axis to a third optical axis. Incoming light on the third optical axis passes through a second refracting surface. The third optical axis is approximately parallel to, and in opposite direction from, the first optical axis.

Provided are a wafer scale lens, which is so short in an optical total length with respect to an image height that it can correct an aberration satisfactory, and an optical system including the wafer scale lens and having a thin lens element on the side closest to the image. The optical system includes a first lens having a positive refractive power relative to an object, and a second lens arranged on the side of the image of the first lens and having a recessed shape on the side of the object. At least one lens is arranged on the side of the second lens. When that one of the lenses arranged on the side of the image of the second lens, which is arranged on the side closest to the image, is an i-th lens (i>3), this i-th lens includes an i-th lens flat plate and is formed on the object side of the i-th lens flat plate but has a refractive index different from that of the i-th lens flat plate, and a lens element having a convex shape on the object side where the main light ray of the maximum image height passes. Moreover, the ratio between the optical axial distance (or the lens distance) between a (i−1)-th lens and the i-th lens and the optical axis distance (or the optical total length) from the object side face of the first lens to the image face is 0.01 to 0.15.

The invention discloses an artificial lens with an iris diaphragm, comprising an optical zone (1) which is transparent at the center, the iris diaphragm (2) surrounding the optical zone (1) and a loop (3); the artificial lens is in an integrated style and is composed of an entire block of material, the material is selected from foldable materials such as hydrophobic acrylic ester, hydrophilic acrylic ester, silica gel, etc. The artificial lens with the iris diaphragm of the invention has soft texture, can be filled or implanted in the eyes by a small incision after being folded; in addition, the artificial lens has high refractive index, thin lens, small incision and slow formation of after cataract and can slowly restore in 2-30 seconds after being implanted, thus cyst membrane is not easy to be damaged; moreover, the artificial lens has the advantages of little astigmia developed in post-operation, quick healing, fast recovery of visual performance and little postoperative treatment; a brown iris, which is the natural color iris of Chinese, can be adopted, and the eye implanted with such an artificial lens looks more natural.

An imaging apparatus and an image sensor including the same are provided. The imaging apparatus includes first, second, and third optical devices. At least one of the first, second, and third optical devices is a thin-lens including nanostructures.

The invention relates to a design method of an ultra-thin lens used for an LED, relates to the optical field and solves the technical problem that the original lens changes from thick to thin. The method divides an incident face into a plurality of small sections of curves according to an opening angle thereof to a light source on the section of a light-passing axis of the original lens by adopting the located point of the LED light source as the center; all the points of the smaller sections of curves are moved along the corresponding incident ray; the length of the original incident ray in the moving process generates amplifying effect by preset proportion; the head part and the tail part of the small sections of adjacent curves after being amplified are connected along the straight line section of the ray direction so as to from a sawteeth section; and the sawteeth section rotates around the optical axis or be drawn along the direction of the normal line of the section so as to form a threaded or sawteeth sheet ultra-thin lens. The method not only can obtain the ultra-thin lens with any thickness and does not have influence on optical effect.

The invention relates to a thin lens which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens from an object side to an image side along an optical axis. The first lens is a convex-concave lens with negative refractive power, the convex surface of the first lens faces the object side, and the concave surface of the first lens faces the image side. The second lens is a lens with positive refractive power. The third lens is a double-concave lens with negative refractive power. The fourth lens is a double-convex lens with positive refractive power. The fifth lens is a concave-convex lens with negative refractive power, and the convex surface of the fifth lens faces the image side.

An image sensor includes a substrate, thin lenses disposed on a first surface of the substrate and configured to concentrate lights incident on the first surface, and light-sensing cells disposed on a second surface of the substrate, the second surface facing the first surface, and the light-sensing cells being configured to sense lights passing through the thin lenses, and generate electrical signals based on the sensed lights. A first thin lens and second thin lens of the thin lenses are configured to concentrate a first light and a second light, respectively, of the incident lights onto the light-sensing cells, the first light having a different wavelength than the second light.

The invention relates to an LED focusing optical system which comprises a reflector, an LED light source arranged at the focal point of the bottom of the reflector and also a thin lens arranged at the opening of the reflector, wherein the surface of the thin lens opposite to the LED light source is a convex surface. The LED focusing optical system realizes high collection of light beams of the LED light source through combination of the thin lens and the reflector to enable the brightness of central light spots to be strong, the influence on an luminescence angle of the system by adding the thin lens is small i.e. the variation of light spots at the outer ring of a lamp is not large, the height of the optical system is only 2-4 times of the size of the light source, and the optical system has the advantages of simple structure, small volume, strong light intensity and large radiation range, therefore, the LED focusing optical system can be widely applied to the field of focusing lamps such as flashlights, miner lamps, headband lamps and the like and fully satisfy the illumination requirement of people to the focusing lamps.

An endoscope having a distally disposed lens and an optical transmission system which transmits the image of the lens to the proximal end of the endoscope is provided. The transmission system includes at least one reversing system, which includes two elements in mutual mirror-inverted arrangement. Each element includes a rod lens with planar faces and at least one optically thin lens having a planar surface. The rod lenses consist of an inhomogeneous material having a positive dispersion and an inhomogeneous refractive index in the radial direction, while the thin lenses are plano-convex lenses.

A new type of thin lens consists of spherical lens being set at front and Fresnel prism being set at back. The process and mode both for preparing said lens are also disclosed.

A thin foldable intraocular implant specifically configured for installation into the anterior chamber of a phakic or pseudophakic eye has broad positioning flaps that do not apply any substantial pressure against the wall of the eye. It can be rolled for insertion through a corneal incision as small as 2.75 millimeters. The implant is constituted by a two-layered resiliently flexible membrane having a corrective layer of about 50 to 130 microns and an overall thickness of about 150 to 530 microns, that vaults the iris without contacting it. The optic is constituted by a multi-order diffractive (MOD) structure, and is made of silicone, PMMA, hydrogel or hydrophobic acrylate.

The invention relates to a method of distribution of absorption of laser crystal radial-direction non-uniform doping control pump light. The method is characterized in that after the pump light output by an optical fiber coupling laser diode optical fiber output end is gathered by a coupling system, the light field of the pump light is distributed in a Gaussian mode or flat Gaussian mode; a pump light anti-reflection film and an oscillating high-reflection film are plated on the pump end face of a radial-direction non-uniform doping crystal, an output mirror is a plane mirror, and the output mirror and the oscillating light high-reflection film on the pump end face of the crystal form a flat resonant cavity; in the working process, a thermal lens formed in the crystal can be simply equivalent to a thin lens on the pump end face of the radial-direction non-uniform doping crystal, and the resonant cavity becomes a stable cavity through the gather effect of the thermal lens; under the condition that a pump light distribution area and an oscillating light distribution area are determined, the spatial overlapping of the pump light distribution area and the oscillating light distribution area are achieved through the radial-direction non-uniform doping optimization design of the laser crystal. According to the method, ideal space coupling efficiency and ideal beam quality can be achieved.

The invention discloses a Gaussian Shell model (GSM) shaping method. After a GSM beam is expanded through a beam expanding mirror and the size of a light spot is changed, the GSM beam vertically enters a first thin lens, and is focused on an amplitude attenuation piece. The light beam from the amplitude attenuation piece is outputted through a second film lens in a collimation manner, thereby obtaining a special part coherent beam. The method can achieve the simultaneous or independent modulation of the light intensity and coherence of the GSM beam, can obtain a result that the distribution of the light intensity and coherence is non-Gaussian distribution, and greatly increases the types of light beams. The invention also discloses a GSM shaping system.

A bionic optical compound eye of an integrated structure belongs to a microstructural optical component and an application field of the microstructural optical component. The bionic optical compound eye is arranged in an ommatidium array according to certain geometric rules of hexagons, squares and the like. Ommatidiums include a micro lens, a crystal cone and a cylindrical waveguide which are coaxial and arranged along the optical axis or the Z axis from the left to the right. No physical distance is arranged between the plano-convex lens and the crystal cone and between the crystal cone and the cylindrical waveguide along the Z axis so as to form a whole. The micro lens can be seen as a plano-convex thin lens. The length from the top end of the micro lens to the tail end of the crystal cone is the focal length of a spherical refraction surface having the same curvature radius and refraction rate as the micro lens sphere. An image space principal point and a focal point of the ommatidiums of the integrated bionic optical compound eye are closely relevant to the length of the cylindrical waveguide. By applying the bionic optical compound eye of the integrated structure to a photoelectric detection system, a photoelectronic imaging system and the like, the system size can be reduced, the system weight is reduced, and complexity of coupling of the bionic optical compound eye with an image sensor or a photoelectric detector can be reduced.

The invention provides an ultra-wide-field lens. The ultra-wide-field lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are successively configured from an object side to an image side along an optic axis ; the first lens, the second lens and the third lens are respectively of a meniscus lens with negative power, and a concave surface of the first lens, the second lens and the third lens faces the image side; both the fourth lens and the fifth lens are respectively of a thick lens with positive power; the third lens and the fourth lens are cemented together; the sixth lens is a biconcave thin lens with negative power; and the seventh lens is a meniscus lens with positive power, and a concave surface of the seventh lens faces the image side. By adopting a reasonable optical structure, when the ultra-wide-field lens is applied to different types of mobile phones for shooting, a focal length equivalent silent frame is 11mm, an imaging angle range is 120 to 126 degrees, a greater range can be photographed in a same distance, and a higher picture quality can be achieved; and moreover, the overall size is relatively small, the structure is simple, and the cost is lower.

A high energy femtosecond laser pulse outer cavity compression arrangement includes one laser amplifier system, thin lens, pulse compression unit, silvering concave mirror, silvering plane reflection mirror, dispersion compensating element, first broadband beam splitting piece, second broadband beam splitting piece, spectrograph, and pulse measurement instrument. It features said pulse compression unit consisting of solid material and vacuum tube, said solid material being used as vacuum tube back light piece and integrated forming, said vacuum tube side wall having inflation port. Said invented device can avoid damage to filter in high-energy pulse incidence state, suitable for large range energy femtosecond laser pulse compression, different wave band incident pulse, and linear polarization and circular polarization incident pulse.

An optical excitation system comprises a substrate (105) comprising at least one delivery means (104), for delivering analytes (109) into at least one region of interest (103), at least one radiation carrier (101) for directing at least one radiation beam from the at least one radiation carrier (101) into the at least one region of interest (103). The substrate (105) includes a thin lens system (120) comprising at least a first thin lens (121), for collimating radiation from the at least one region of interest (103) to a remote detection system (130). A particle sensor and sensing system comprising the excitation system are also provided, for example a modular particle sensor and modular sensing system, wherein the optical excitation system may be single use and disposable.

The embodiment of the invention discloses an analysis method, verification system and verification method of a laser echo transmission characteristic. The analysis method includes the steps: enabling a cat-eye system to be equivalent to a thin lens and a reflector, and enabling the transmission process of a gauss beam irradiation cat-eye system to be equivalent to a 4f system with defocusing amount; utilizing matrix optics to analyze the 4f system to obtain a transmission matrix of the gauss beam irradiation cat-eye system; according to the transmission matrix, an ABCD law of the gauss beam, the transformation rule of a q parameter, and an input parameter of the gauss beam, obtaining a light spot radius of a reflected light beam; and according to the relationship between the divergence angle of the reflected light beam and the light spot radius of the reflected light beam, obtaining the relationship between the divergence angle of the reflected light beam and the defocusing amount. The analysis method of a laser echo transmission characteristic can reveal the rule about influence of the defocusing amount on the cat-eye echo divergence angle, can get a more accurate analysis result compared with the analysis result based on geometrical optics, and has very high application value and research value.

An image sensor includes a substrate, thin lenses disposed on a first surface of the substrate and configured to concentrate lights incident on the first surface, and light-sensing cells disposed on a second surface of the substrate, the second surface facing the first surface, and the light-sensing cells being configured to sense lights passing through the thin lenses, and generate electrical signals based on the sensed lights. A first thin lens and second thin lens of the thin lenses are configured to concentrate a first light and a second light, respectively, of the incident lights onto the light-sensing cells, the first light having a different wavelength than the second light.

A thin ophthalmic lens stabilized through incorporation of flange around all or a portion of a perimeter of the thin lens.

The invention discloses an optical system for precisely regulating and controlling the size of a hollow light beam.The optical system comprises an optical platform, a laser is placed on the optical platform, and a collimation and beam expanding system, a diameter-adjustable circular seam, rotary ground glass, a thin lens and an axicon are sequentially placed along the light path of the laser.By means of the optical system, the size of the hollow light beam can be precisely regulated and controlled in the mode of changing the diameter of the circular seam, and a simple and effective new way is provided for acquiring the hollow light beam with the adjustable size.A powerful means is provided for flexibly controlling particles with different sizes.The optical system has the advantages that the number of involved optical elements is small, the structure is simple, constructing and debugging are easy, operation is easy, the size of the hollow light beam is controlled precisely, and therefore the optical system has wide market prospects in practical application.