50results about How to "Few lenses" patented technology

The invention relates to PCR detection, and concretely relates to a real-time fluorescent quantitative PCR detection system. The real-time fluorescent quantitative PCR detection system has a simple structure, is simple to operate and can simultaneously realize the fluorescent detection imaging of all samples. The real-time fluorescent quantitative PCR detection system comprises a light source, a multi-band-pass excitation optical filter, a multi-band-pass dichroscope, a lens assembly, a heat cycle system, a multi-band-pass fluorescent optical filter, a color plane array detector and an information analysis processing unit; the light source and the excitation optical filter are arranged on the horizontal axis of the dichroscope having an angle of 45DEG with a horizontal direction, and light emitted by the light source passes through the excitation optical filter reaches the dichroscope; and the lens assembly, the fluorescent optical filter and the color plane array detector are arranged on the vertical axis of the dichroscope having an angle of 45DEG with the horizontal direction from bottom to top, and the color plane array detector is connected with the information analysis processing unit.

A zoom lens comprises a first lens unit having positive refractive power, a second lens unit having negative refractive power, an aperture stop, a third lens unit having positive refractive power and kept fixed during zooming, a fourth lens unit having positive refractive power, and a fifth lens unit having negative refractive power, which are arranged in this order from an object side. In zooming from a wide-angle end to a telephoto end, the second lens unit is moved toward an image plane side such that a spacing between the first lens unit and the second lens unit is increased, and the aperture stop is also moved.

The invention discloses a super-large field-of-view fish eye lens. An optical system is of a four-set five-piece structure, the super-large field-of-view fish eye lens is composed of a first lens set with negative diopter and a second lens set with positive diopter from left to right, the first lens set is composed of a first negative lens and a second negative lens sequentially from object space to image space, the second lens set is composed of a third positive lens, a fourth positive lens and a fifth negative lens, each of the fourth positive lens and the fifth positive lens is a balsaming lens, and a diaphragm is positioned between the third positive lens and the fourth positive lens. Parameters of the first lens set are acquired through an optimization method, and aberration of the second lens set is ensured to equally offset aberration caused by the first lens set. The optical system has the advantages of simple structure and good imaging quality.

The invention discloses a quantitative PCR (polymerase chain reaction) detection system for tunable fluorescent, and relates to a PCR detection system. The tunable quantitative fluorescent PCR detection system is provided with a light source, an excitation light filter, a dichroscope, a lens group, a thermal cycling system, a tunable light filter, a tuning control unit, an area-array detector and an information analyzing and processing unit; the light source and the excitation light filter are arranged on the horizontal axis (which forms a 45-degree angle with the horizontal direction) of the dichroscope, and light emitted by the light source is irradiated on the dichroscope through the excitation light filter; the lens group and the thermal cycling system are arranged on the vertical axis of the dichroscope, and excitation light is irradiated on the thermal cycling system through the lens group; the tunable light filter is arranged on the horizontal axis or the vertical axis of the dichroscope; the centre of the area-array detector and the centre of the tunable light filter are located on a same straight line; the tuning control unit is used for controlling the rotation of the tunable light filter; and the area-array detector is connected with the information analyzing and processing unit. The quantitative PCR detection system for the tunable fluorescent is simple in structure, easy and convenient to operate, and capable of performing multi-wavelength fluorescent detection imaging on all samples.

The invention relates to an axial-zooming tri-view-field long-wave infrared imaging optical system. The system comprises an objective lens, a zooming lens, a compensating lens, a focusing lens and a converging lens set which are sequentially arranged in the same optical axis from the object space to the image space, and the surface, close to the image space, of the compensating lens adopts a diffraction surface; design index parameters of the optical system are as followed: working waveband ranges from 7700 nm to 9500 nm, the focal distance of the system in a large view field is 22 mm, the focal distance of the system in a middle view field is 92 mm, and the focal distance of the system in a small view field is 550 mm; the working environment temperature ranges from minus 40 DEG C to 60 DEG C. According to the axial-zooming tri-view-field long-wave infrared imaging optical system, switching among the three view fields is achieved by axially moving the zooming lens and the focusing lens, and the zooming ratio can reach 25 times; in addition, by axially regulating the position of the focusing lens, focal point drifting on the image surface due to the temperature changes can be compensated, it is guaranteed that the image quality is not changed along with the temperature, and therefore the high-low temperature environmental suitability of the optical system is good.

The invention relates to a double-group linkage infrared continuous zooming optical system, the system comprises a front fixed group, a first zooming group, compensation groups, a second zooming group and a rear fixed group which are arranged from object space to image space along optical axis in sequence, the first zooming group and the second zooming group make axial directional linear movement on an optical axis with the same direction and same speed, and the compensation groups make axial directional non-linear movement in the opposition direction on the optical axis, so as to realize image plane displacement compensation; the system is formed by two zooming groups and two compensation groups arranged between the two zooming groups, the two zooming groups share responsibility for focal power, so that the image plane displacement generated in the zooming process is small, the burden on the compensation groups is reduced, so that the movement curve of the compensation groups is flat. The structure of the optical system is simple, and miniaturization is easy to realize. The system control difficulty has no need to be increased, the amount of system lens can be reduced, the miniaturization can be realized, and the zoom ratio of the optical system can be increased.

One embodiment of the invention discloses a fish eye monitoring optical system. The system at least successively comprises a front lens group and a rear lens group from an object surface to an image surface along an optical axis, wherein the front lens group comprises a first lens, a second lens, a third lens and a fourth lens; and the rear lens group comprises a fifth lens, a sixth lens, a seventh lens and an eighth lens. On the other hand, another embodiment of the invention also provides a lens. According to the embodiments of the invention, the front lens group and the rear lens group are provided with eight lenses all together, the number of the lenses is reduced, and the structure is simple; and besides, optical conditions which are met by the optical system or the lens enable the optical system or the lens to have excellent performance of large aperture, high resolution, day and night confocal property the like.

The invention discloses a small-distortion stereo endoscope optical system, which comprises an endoscope objective lens, a steering system and an electronic imaging lens system, wherein the endoscope objective lens is provided with a direct vision endoscope objective lens assembly and an oblique vision endoscope objective lens assembly; one side, along a light propagation direction, of the direct vision endoscope objective lens assembly is provided with a sapphire protection film; one side of the sapphire protection film is provided with a first negative lens; one side of the first negative lens is provided with a second negative lens; one side of the second negative lens is provided with a parallel flat plate; one side of the parallel flat plate is provided with a plano-convex lens; and the oblique vision endoscope objective lens assembly is provided with a steering prism. The structure is simple; assembly is facilitated; the objective lens, the steering system and the electronic imaging lens system are used to correct various aberrations in a combination mode, a clear electronic image can be acquired, through optimizing an inverting system group number and an inverting system structure, the lens number of the optical system is the minimal, stray lights caused due to lens surface reflection can be reduced, and the image contrast ratio is improved.

The invention belongs to the technical field of fundus medical science, concretely relating to an optical system of a portable fundus camera. Fundus images of human eyes are acquired by using an optical imaging method in order to determine pathologies and lesions of fundus diseases. The optical system of the portable fundus camera comprises two parts including an imaging system and an illuminatingsystem. The imaging system comprises a tested human eye, an ocular objective lens, an imaging objective lens and a reception device. The illuminating system comprises the tested eye, the ocular objective lens, a half-reflecting pellicle mirror, an illuminating objective lens, an annular diaphragm, a collecting mirror and a light source. The included angle formed between the half-reflecting pellicle mirror and a primary optical axis is 45 degrees. A dark light source commonly used in medical science is adopted by the light source. The reception device employs CCD or CMOS. Optical elements adopted by the system are all ordinary spherical mirrors which are convenient to process and manufacture. In this sense, cost is reduced. In addition, the system has just a few optical elements so that the structure is simple. The system is convenient to operate.

The embodiment of the invention discloses a large-aperture high-pixel camera module group, and the module group at least comprises a lens, a pedestal, and a light sensing device. The interior of the lens is provided with an optical system, and the optical system is sequentially provided with a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object space to the image space. The object plane of the first lens is a convex surface, and the image plane of the first lens is a concave surface. The object plane of the second lens is a convex surface, andthe image plane of the second lens is a concave surface. The object plane of the third lens is a convex surface, and the image plane of the third lens is a concave surface. The fourth lens is a biconvex lens. The fifth lens is a biconvex lens. The object plane of the sixth lens is a concave surface, and the image plane of the sixth lens is a convex surface. The fifth lens and the sixth lens form acombined lens, and meet a condition: TTL/EFL<=4.5. According to the invention, a lens cone mainly consists of the six lenses, and the number of lenses is small, and the structure is simple. The module group employs the combination of different lenses, and the fourth and fifth lenses are bonding lenses. The module group is large in aperture, is high in pixel, is low in distortion, and is good in athermalization.

The invention discloses a camera shooting assembly and electronic equipment, and belongs to the technical field of camera shooting. The camera shooting assembly comprises a base; a lens assembly, wherein the lens assembly is arranged on the base; a lens module, wherein the surface of one side, facing the lens assembly, of the lens module is provided with sub-wavelength structures which are distributed in an array; and a photosensitive chip, wherein the lens assembly, the lens module and the photosensitive chip are sequentially arranged at intervals along the axial direction of the lens assembly. According to the camera shooting assembly, the sub-wavelength structures distributed in the array mode are arranged on the surface of the side, facing the lens assembly, of the lens module, chromatic dispersion of a camera lens can be reduced through the sub-wavelength structures, the color of the edge of an image is improved, the color of the center and the color of the periphery of the imageare uniform, the number of lenses of the lens can be reduced, and the thickness of the module is reduced.

The invention is a sort of filter projective photoetching objective lens with a super resolution ratio, it is made up of outer hermetic thermostat wrap, interface-layer's drawtube, inner lens frame module which isolating fixed optical lens components, and filter module. It has filter axial overlap function, augments focal depth, overcomes deficiency that the photoetching resolution ratio of current projective photoetching objective lens and can't draw graph with high resolution ratio, it has characters of super-high photoetching resolution ratio, big focal depth, large minification of optical system, simple structure and that it reduces manufacturing difficulty and cost of super micro-masking greatly.

The invention discloses a composite light spot laser system based on a plurality of optical fiber output laser modules and a machining head. A plurality of low-power light sources are directly used togenerate a composite light spot through an optical system, and the laser system is used for manufacturing the machining head. The composite light spot laser system based on the optical fiber output laser modules comprises the optical fiber output laser modules, a plurality of collimating lenses corresponding to the optical fiber output laser modules and a focusing lens; the output optical fiber end surfaces of the optical fiber output laser modules are located near the front foci of the collimating lens corresponding to the optical fiber output laser modules, the collimating lens at least comprises one lens; the focusing lens at least comprises one lens and is located behind the collimating lens. The use of a high-power laser beam combiner is avoided, the laser output is dispersed at a plurality of points, heat concentration is avoided, and the reliability problems caused by the beam combiner are solved; the beam quality is improved; the thermal problem in the laser optical system canbe greatly eliminated by technical means; by dispersing the thermal problem and adopting heat conduction measures, the impact of the thermal effect can be greatly reduced, and the reliability and characteristics of the system can be improved.

The embodiment of the invention discloses an infrared confocal in-vehicle monitoring optical system. The infrared confocal in-vehicle monitoring optical system sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object plane to an image plane along an optical axis, the object plane side of the first lens is a convex surface, the image plane side is a concave surface, and the focal power is negative; the object plane side of the second lens is a convex surface, and the focal power is positive; the image surface side of the thirdlens is a concave surface, and the focal power is negative; the fourth lens and the fifth lens are biconvex lenses, and the focal power of the fourth lens and the fifth lens is positive; the object plane side of the sixth lens is a concave surface, the image plane side is a convex surface, and the focal power is negative. On the other hand, the embodiment of the invention further provides a camera module. The optical system or the camera shooting module is mainly composed of six lenses, the number of the lenses is small, the structure is simple, and the cost is low; meanwhile, different lenses are mutually combined, the focal power is reasonably distributed, and the lens has the optical properties of infrared confocal property, high pixel, good thermal compensation and the like and is suitable for the field of vehicle-mounted lenses.