36results about How to "Reduce aberration" patented technology

This invention relates to the field of laser special light source technology, and provides a laser-driven white light source device, which includes a laser source, an optical system, a gas-loaded structure, and a high-voltage driving component. The laser source is suitable for providing a laser beam; the optical system is suitable for focusing the laser beam; the gas-loaded structure is located on the side of the optical system away from the laser source, and the center of the gas-loaded structure corresponds to the focusing area of ​​the laser beam; the high-voltage driving component is suitable for igniting plasma within the gas in the gas-loaded structure; wherein, the gas-loaded structure has a gas carrier incident surface and a gas carrier exit surface arranged opposite each other along the propagation path, and the curvature of the gas carrier incident surface and the gas carrier exit surface is constant in the direction perpendicular to the propagation path. This application can reduce the generation of aberrations, thereby reducing the size of the emitting point and resulting in better consistency of the emitting point; at the same time, the uniformity of white light output and the spectral radiance are also better.

This invention provides an optical lens comprising eight lenses, arranged sequentially along the optical axis from the object side to the image plane: a first lens with negative optical power, its object side being convex and its image side being concave; a second lens with positive optical power, its object side being concave and its image side being convex; a third lens with negative optical power, its object side being convex and its image side being concave; a fourth lens with positive optical power, its object side being concave and its image side being convex; a fifth lens with positive optical power, both its object side and image side being convex; a sixth lens with positive optical power, both its object side and image side being convex; a seventh lens with negative optical power, both its object side and image side being concave; and an eighth lens with positive optical power, both its object side and image side being convex. The optical lens provided by this invention can improve the imaging quality of an optical lens, reduce aberrations, and enhance the overall image quality.

The application discloses an optical system, which comprises a first lens group, a second lens and a third lens in sequence from a first side to a second side along an optical axis, wherein the first lens group comprises a reflective polarizing element, a quarter-wave plate and a first lens in sequence from the first side to the second side, the second side of the reflective polarizing element is attached to the first side of the quarter-wave plate, the second side of the quarter-wave plate is attached to the first side of the first lens, at least one of the first side and the second side of the first lens, the first side and the second side of the second lens is provided with a partial reflection layer, the first side of the first lens is a concave surface, the second side of the first lens is a convex surface, the second side of the second lens is a convex surface, and the curvature radius R1 of the first side of the first lens and the curvature radius R4 of the second side of the second lens satisfy 0 < R1 / R4 < 2.

The utility model discloses a LCD projection structure with aspheric reflector, which comprises an LCD screen, a Fresnel lens, a projection lens and an aspheric reflector. The LCD screen is arranged on the front side of the Fresnel lens, the projection lens is arranged on the back side of the Fresnel lens, and the aspheric reflector is arranged between the Fresnel lens and the projection lens or on the back side of the projection lens. The aspheric reflector is arranged between the Fresnel lens and the projection lens or on the back side of the projection lens. The structure design utilizes the reflection characteristics of the aspheric reflector to change the propagation path of light, provides sufficient optimization freedom for the projection lens, and makes the projection lens not need to spend energy to deal with the optical correction problem. Therefore, all optimization resources can be concentrated on the improvement of picture quality and depth of field, so as to improve the quality of the projection picture.

This invention provides an optical lens comprising seven lenses, arranged sequentially along the optical axis from the object side to the image plane: a first lens with negative optical power, its object side being convex and its image side being concave; a second lens with negative optical power, its object side being concave; a third lens with positive optical power, its object side being convex and its image side being convex; a fourth lens with positive optical power, its object side being convex and its image side being concave; a fifth lens with positive optical power, its object side being convex near the optical axis and its image side being convex; a sixth lens with negative optical power, its object side being concave; and a seventh lens with negative optical power, its object side being convex near the optical axis and its image side being concave near the optical axis. The optical lens provided by this invention, through a specific combination of surface shapes and a reasonable allocation of optical power, enables the lens to possess one or more advantages such as a large field of view, a large aperture, a large image height, high pixel count, and high image quality.

The application provides an optical lens, which comprises seven lenses in sequence along an optical axis from an object side to an imaging surface, and the seven lenses comprise: a first lens with negative optical power, wherein the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; a second lens with negative optical power, wherein the object side surface and the image side surface of the second lens are both concave surfaces; a third lens with positive optical power, wherein the object side surface and the image side surface of the third lens are both convex surfaces; a fourth lens with positive optical power, wherein the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface; a fifth lens with positive optical power, wherein the object side surface and the image side surface of the fifth lens are both convex surfaces; a sixth lens with negative optical power, wherein the object side surface and the image side surface of the sixth lens are both concave surfaces; and a seventh lens with positive optical power, wherein the object side surface and the image side surface of the seventh lens are both convex surfaces. The optical lens provided by the application has one or more advantages, such as a large aperture, a large field of view, high imaging quality and the like, through specific surface shape matching and reasonable optical power distribution.

The invention relates to the technical field of spectral measurement, in particular to a compact broadband grating spectrometer and a spectral measurement method thereof.The compact broadband grating spectrometer comprises a vacuum chamber, a broadband light source, a slit assembly, a multi-grating control tower assembly and a detector assembly, and the multi-grating control tower assembly is arranged in the vacuum chamber; comprising a plurality of concave-surface variable-pitch diffraction gratings which are arranged on a grating turret mechanism and have different center line densities, the concave-surface variable-pitch diffraction gratings are switched between a working position and a non-working position along with rotation of the grating turret mechanism, and a grating mirror receives light beams from an incident window, disperses the light beams and reflects the light beams to an emergent window; and the detector assembly receives the dispersed spectral signal and realizes focusing detection. The multi-grating configuration capable of being rotatably switched is utilized, the wave band coverage range is effectively expanded on the premise that a complex mechanical structure is not introduced, the concave-surface variable-pitch gratings have the dispersion and focusing functions, the light path structure is simplified, aberration is reduced, and miniaturization and high resolution of the system are achieved.

This invention provides an optical lens comprising eight lenses of optical power, arranged sequentially along the optical axis from the object side to the image plane: a first lens with negative optical power, its object side being concave and its image side being convex; a second lens with positive optical power, its object side being convex and its image side being convex; a third lens with negative optical power, its object side being concave; a fourth lens with positive optical power; a fifth lens with positive optical power, its object side being convex; a sixth lens with negative optical power, its image side being concave; a seventh lens with negative optical power, its object side being convex and its image side being concave; and an eighth lens with positive optical power. The optical lens provided by this invention, through a specific combination of surface shapes and a reasonable distribution of optical power, achieves one or more advantages such as miniaturization, telephoto capability, large image plane, large aperture, and high image quality.

The invention discloses a reflection module and a camera module thereof, the reflection module comprises a reflection element, the reflection element is used for reflecting light incident along a first direction to a second direction, and the reflection element comprises a light incident side along the first direction and a light emergent side along the second direction; the second lens is arranged on the light emitting side of the reflecting element, a second optical axis is defined by the second lens, and the second optical axis is parallel to the second direction; the movable assembly is used for bearing the reflecting element and the second lens; the movable assembly is movably arranged in the fixed assembly; the driving assembly is configured to drive the movable assembly to drive the second lens and the reflecting element to synchronously rotate around a second direction; and in the process that the second lens and the reflecting element rotate around the second direction together, the edge light rays penetrating through the second lens are symmetrically distributed relative to the second optical axis.

The application provides an optical lens, which comprises six lenses in sequence along an optical axis from an object side to an imaging surface, and the six lenses comprise: a first lens with negative optical power, wherein the object side surface of the first lens is a concave surface, and the image side surface of the first lens is a convex surface; a second lens with positive optical power, wherein the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; a third lens with negative optical power, wherein the image side surface of the third lens is a concave surface; a fourth lens with positive optical power, wherein the object side surface and the image side surface of the fourth lens are both convex surfaces; a fifth lens with negative optical power; and a sixth lens with positive optical power. The optical lens provided by the application adopts six lenses with specific optical power, and through specific surface shape matching and reasonable optical power distribution, the imaging quality of the optical lens can be improved, the aberration can be reduced, and the imaging quality of the optical lens can be improved, so that the lens has one or more advantages such as a large target surface, a large aperture, high imaging quality and the like.

This application provides an optical system and a laser cutting device. The system includes a first focusing lens, a concave lens, and a focusing lens group arranged coaxially along a first direction. The first direction is the initial transmission direction of the light emitted by the target light source. The optical axis of the first focusing lens passes through the virtual focal point of the target light source. The virtual focal point is the point where the reverse rays of the light emitted by the target light source converge. The distance between the first focusing lens and the virtual focal point of the target light source is greater than the focal length of the first focusing lens. The concave lens is configured to change the distance between itself and the first focusing lens to adjust the aberration of the light emitted by the target light source. As the distance between the first focusing lens and the concave lens in the collimating lens group changes from far to near, the optical system exhibits the following trends: negative defocus beam convergence and tending towards a flat top, positive defocus dispersion and tending towards Gaussianization, then the distribution of positive and negative defocus beams becomes equal, and finally, negative defocus dispersion and tending towards Gaussianization, and positive defocus beam convergence and tending towards a flat top.

The application provides a large-view-field compact reflective projection objective lens, and belongs to the technical field of semiconductor manufacturing lithography. The projection objective lens system comprises six aspheric mirrors. After a light source irradiates a mask, the light source sequentially passes through a first mirror M1, a second mirror M2, an aperture, a third mirror M3, a fourth mirror M4, a fifth mirror M5 and a sixth mirror M6. The aperture is located between the second mirror M2 and the third mirror M3. Finally, the light source is imaged on a wafer surface, and the projection objective lens system realizes an image reduction ratio of 0.2. In the embodiment of the application, the light path does not have a light blocking phenomenon and the structure is compact. The main optical parameters are as follows: the numerical aperture on the image side is 0.2, the object field on the object side is 10mm, and the total length of the system is 1280mm.

The application provides a projection lens, which comprises successively along the optical axis from the projection surface to the image source surface: a first lens with positive focal length, the projection side surface of which is a convex surface and the image source side surface of which is a concave surface; a second lens with positive focal length, the projection side surface of which is a convex surface and the image source side surface of which is a convex surface; a third lens with negative focal length, the projection side surface of which is a concave surface and the image source side surface of which is a concave surface; a fourth lens with negative focal length, the projection side surface of which is a concave surface and the image source side surface of which is a concave surface; a fifth lens with positive focal length, the projection side surface of which is a convex surface and the image source side surface of which is a convex surface; a sixth lens with positive focal length, the projection side surface of which is a convex surface and the image source side surface of which is a convex surface; a prism; and a protective glass. The projection lens provided by the application has one or more advantages of preventing sunlight from flowing back, large aperture, small distortion and the like.

The present invention provides an optical lens. The number of lenses with optical power is five. Along the optical axis, from the object side to the imaging surface, it successively includes: a first lens with negative optical power; a second lens with positive optical power, whose object side surface is convex and whose image side surface is concave; a third lens with negative optical power, whose object side surface is convex and whose image side surface is concave; a fourth lens with positive optical power, whose object side surface is convex; a fifth lens with positive optical power; wherein, the focal length f3 of the third lens and the effective focal length f of the optical lens satisfy: -1.4 < f3 / f < -0.85. The optical lens provided by the present invention has one or more advantages such as a large image surface, a long focal length, a large aperture, and high imaging quality through specific surface shape matching and reasonable optical power distribution.

The invention provides an optical lens, which comprises six lenses with focal power, and sequentially comprises a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with positive focal power and a sixth lens with negative focal power from an object side to an imaging surface along an optical axis, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; the fifth lens has negative focal power, and the object side surface of the fifth lens is a concave surface; the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface; wherein the focal length f2 of the second lens and the focal length f3 of the third lens meet the formula:-1lt; f2 / f3lt; and-0.7. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of long focus, large aperture, high imaging quality and the like.

The invention provides an optical lens, which comprises four lenses with focal power, and sequentially comprises a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with positive focal power and a sixth lens with negative focal power from an object side to an imaging surface along an optical axis, the object side surface of the second lens is a convex surface; the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; the fourth lens has positive focal power; wherein the optical total length TTL of the optical lens and the real image height IH corresponding to the maximum field angle of the optical lens meet the following conditions: 0.7 lt; tTL / IHlt; and 0.9. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of miniaturization, high pixel, small distortion, large aperture, high imaging quality and the like.

The utility model relates to the technical field of vein palmprint identification, in particular to vein palmprint identification equipment, which comprises a main control chip, an infrared light source module, an optical imaging module, a living body detection module, a heat dissipation structure and an anti-counterfeiting processing module. According to the utility model, the structure is novel, infrared light can uniformly irradiate a palm, edge dark areas or center overexposure can be avoided, vein image quality can be improved, ambient light interference can be effectively inhibited, aberration can be reduced, blood vessel edge definition can be improved, and counterfeiting means such as silica gel artificial hands, photos or vein printing can be effectively resisted; the LED working temperature stability is ensured, wavelength drift is avoided, the service life is prolonged, the palm of a user is automatically adjusted to the optimal imaging position, the operation difficulty is reduced, the recognition success rate is improved, stable imaging can be ensured under different illumination conditions, the calculation amount is reduced while the precision is ensured, the recognition efficiency is high, and the energy consumption is low.

The application provides an optical lens, which comprises, in sequence from an object side to an imaging surface along an optical axis, a first lens with negative optical power, wherein the object side surface of the first lens is a convex surface and the image side surface of the first lens is a concave surface; a second lens with positive optical power; a third lens with positive optical power, wherein the object side surface of the third lens is a convex surface; a fourth lens with positive optical power, wherein the image side surface of the fourth lens is a convex surface; a fifth lens with negative optical power, wherein the object side surface of the fifth lens is a convex surface and the image side surface of the fifth lens is a concave surface; a sixth lens with positive optical power, wherein the object side surface of the sixth lens is a convex surface and the image side surface of the sixth lens is a convex surface; and a seventh lens with negative optical power, wherein the object side surface of the seventh lens is a concave surface and the image side surface of the seventh lens is a convex surface; the optical total length TTL of the optical lens satisfies 14.2mm<TTL<15.2mm; and the optical total length TTL of the optical lens and the effective focal length f of the optical lens satisfy 3<TTL / f<5. The optical lens provided by the application can improve the imaging quality of the optical lens and has the advantage of excellent imaging quality by specific surface shape matching and reasonable optical power distribution.

The present invention provides an optical lens. The number of lenses with optical power is five. Along the optical axis from the object side to the imaging surface, it sequentially includes: a first lens with negative optical power, whose object side surface is concave; a second lens with positive optical power, whose object side surface is concave and whose image side surface is convex; a third lens with negative optical power, whose image side surface is concave; a fourth lens with positive optical power, whose object side surface is convex and whose image side surface is concave; a fifth lens with positive optical power, whose image side surface is convex; wherein, the focal length f5 of the fifth lens and the effective focal length f of the optical lens satisfy: 0.9 < f5 / f < 1.3. The optical lens provided by the present invention has one or more advantages such as a large image surface, a long focal length, a large aperture, and high imaging quality through specific surface shape matching and reasonable optical power distribution.

The present invention provides an optical lens, which has a total of six lenses. Along the optical axis, from the object side to the imaging surface, it sequentially includes: a first lens with a negative focal power, whose object side is concave and whose image side is concave; a second lens with a negative focal power, whose object side is convex and whose image side is concave; a third lens with a positive focal power, whose object side is convex and whose image side is concave; a fourth lens with a positive focal power, whose object side is convex and whose image side is convex; a fifth lens with a negative focal power, whose object side is concave and whose image side is concave; a sixth lens with a positive focal power, whose object side is convex near the optical axis and whose image side is convex. Among them, the combined focal length f123 of the first lens, the second lens and the third lens and the combined focal length f456 of the fourth lens, the fifth lens and the sixth lens satisfy: 1.1 < f123 / f456 < 2.4. The optical lens provided by the present invention has one or more advantages such as a large target surface, a large aperture, and low distortion.

The application provides an optical lens, which comprises six lenses in sequence along an optical axis from an object side to an imaging surface, and the six lenses comprise: a first lens with negative optical power, wherein the object side surface and the image side surface of the first lens are both concave; a second lens with positive optical power; a third lens with positive optical power; a fourth lens with negative optical power, wherein the object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex; a fifth lens with positive optical power; and a sixth lens with negative optical power, wherein the object side surface of the sixth lens is concave, and the image side surface of the sixth lens is convex. The optical lens provided by the application has one or more advantages of low cost, high resolution, high imaging quality and the like through specific surface shape matching and reasonable optical power distribution.

The application provides an optical lens, the number of lenses with optical power is four, and the optical lens comprises, in sequence from an object side to an imaging surface along an optical axis, a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power and a fourth lens with positive optical power, wherein the object side of the first lens is a convex surface, the image side of the first lens is a concave surface, the object side of the second lens is a convex surface, the image side of the second lens is a convex surface, the object side of the third lens is a convex surface, the image side of the third lens is a convex surface near the optical axis, and the object side of the fourth lens is a convex surface near the optical axis; wherein the total optical length TTL of the optical lens and the effective focal length f of the optical lens satisfy 13.5 < TTL / f < 14.9. The optical lens provided by the application has one or more advantages such as a large field of view, a short total length, a large aperture, a large image surface and high imaging quality by specific surface shape matching and reasonable optical power distribution.

The utility model relates to optical field, concretely is a kind of traffic lens and imaging device, the traffic lens is sequentially composed of fixed lens group of positive focal power, focusing lens group of negative focal power and compensation lens group of positive focal power from object plane side to image plane side;The focusing lens group moves along the main optical axis direction of the traffic lens, for adjusting the object distance of the traffic lens;The traffic lens satisfies the following conditional formula:-4 The focal length of focusing lens group is reduced, the focal length of focusing lens group front group and rear group is optimized, the possibility of excessive volume of front group and rear group is reduced, the traffic lens has small change in resolving power, and the miniaturization of traffic lens is realized.

The application discloses a kind of high-frequency single-photon tilt wavefront detection method and device, comprising the following steps: using wavefront modulation technique, high-speed coding and modulation are carried out to incident light wavefront;Single-photon signal acquisition, using single-photon detector, the single-photon signal focused after being focused by light signal guiding focusing device is collected, and the received photon signal is converted into electrical signal and is output by detector;Single-photon signal processing, single-photon signal wavefront reconstruction, according to the extracted wavefront tilt information, wavefront is reconstructed using wavefront reconstruction algorithm;Data correction;Data result analysis.The application uses wavefront modulation technique to carry out high-speed coding and modulation to incident light wavefront, can improve the performance of light signal guiding focusing device, enhance system flexibility, wavefront modulation technique allows the amplitude, phase, polarization state and wave vector direction parameter of light wave to be independently or simultaneously regulated, which greatly enhances the flexibility and functionality of light signal guiding focusing device, and can optimize imaging quality.

The invention provides an optical lens, which comprises five lenses with focal power and sequentially comprises a first lens with negative focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power from an object side to an imaging surface along an optical axis, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens has negative focal power, and the image side surface of the third lens is a concave surface; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface; the fifth lens has positive focal power, and the object side surface of the fifth lens is a convex surface; wherein the focal length f2 of the second lens and the effective focal length f of the optical lens meet the following conditions: 0.8 lt; f2 / flt; 1.1. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of large image surface, long focus, large aperture, high imaging quality and the like.

The present application relates to the field of optics, specifically to a zoom lens and an imaging device. The zoom lens comprises, from the object side to the image side, a first fixed lens group with positive focal power, a variable magnification lens group with negative focal power, a diaphragm, a second fixed lens group with positive focal power, a focusing lens group with negative focal power, and an auxiliary lens group with positive focal power. The zoom lens satisfies the following conditions: ft / fw>10; TTL<130mm; wherein ft is the focal length of the zoom lens in a telephoto state, fw is the focal length of the zoom lens in a wide-angle state, and TTL is the total optical length of the zoom lens. The zoom lens with a medium magnification is achieved, and the total optical length of the zoom lens is limited, thereby achieving a small size of the zoom lens, which facilitates the use of the zoom lens.

The utility model relates to optical technology field especially relates to a middle long wave refrigeration double wave band harmonic diffraction lens, including first lens, second lens, third lens and refrigeration detector, the utility model discloses through setting first lens, second lens, third lens and refrigeration detector, wherein the refrigeration detector is composed of window, cold screen, cold diaphragm and imaging focal plane, and it is sequentially arranged according to the direction from object side to image side, can constitute the middle long wave refrigeration double wave band harmonic diffraction lens of adaptation resolution 640x512, image element size is 15 microns, the total length of optical system reaches 138.42mm, the maximum aperture reaches 96mm, the imaging quality under two wave bands is good, and the compact structure can utilize the special dispersion principle of harmonic diffraction optical element, produces different diffraction effects under different wavelengths, realizes the accurate control to different wave band light, thereby can reduce aberration, and effectively corrects aberration on wide wave band.

The application discloses a laser etching machine, comprising a first laser light source for emitting a first laser with a cross-sectional shape of a strip, a second laser light source for emitting a second laser with a cross-sectional shape of a strip, and a light combiner, wherein the first laser and the second laser are incident to the light combiner, the light combiner is used for combining the first laser and the second laser, and the first laser and the second laser are combined in a manner that the polarization directions are perpendicular to each other. The technical scheme can improve the energy density of the spot center of the laser etching machine.