66results about How to "Low number of lenses" patented technology

The invention discloses a waveguide display device, which relates to the technical field of optics. The waveguide display device comprises an image source, a relay optical system, an input coupler, a waveguide and an output coupler, wherein the image source is used for displaying an image; the relay optical system is used for emitting the image displayed by the image source to the input coupler; the input coupler is used for coupling emergent light of the relay optical system to the waveguide; and the output coupler is used for coupling out light propagated in the waveguide. The optical device can use the small-sized image source, and the design difficulty and the complexity degree of the relay optical system can be reduced.

A solid-state imaging device (1) includes a supporting substrate (3) that includes a concave portion (2), a solid-state imaging chip (4) that is bonded on the supporting substrate (3) so as to seal the concave portion (2) in a view-angle region, a stress film (5) that is formed on the surface of the solid-state imaging chip (4), and an imaging surface curved toward the concave portion (2) at least in the view-angle region.

A large-relative-aperture long-focal length non-cooled infrared athermalization optical system is arranged in front of the focal plane in the light spreading direction, and is composed of a main reflector, a secondary reflector, a first positive crescent lens, a second positive crescent lens, a reflection / diffraction mixed lens, a movable lens and a second negative crescent lens which are coaxially arranged in parallel. The system adopts a cassette system to increase the optical path by multiple reflections of light, thereby realizing the long coking of the optical system, wherein F<#> is 1; the focal length is 500mm; the center block is smaller or equal to 0.3; and the optical total length and focal length ratio is smaller than or equal to 0.64. Through the secondary imaging, the impact of stray light on the image quality of the system can be effectively inhibited. With the utilization of characteristics of negative dispersion and negative thermal expansion coefficient of the diffractive element and the reasonable distribution of the focal power of the reflection / diffraction mixed lens, the defocusing amount caused by the infrared optical system due to the temperature change is reduced, and combined with the mechanical active athermalization, the image plane defocusing compensation of the system in the temperature range of from -40 DEG C to +60 DEG C is achieved.

The invention relates to a zoom infrared optical system, a zooming device and a manufacturing method thereof, in particular to a multi-gear zoom infrared optical system, a linearly cut-in zooming device and a manufacturing method thereof. The zooming device comprises a long-focus lens group and a zooming lens group, wherein lens materials are both optical materials which can work on an infrared wave band; the long-focus lens group consists of a front fixed lens group and a rear fixed lens group; the zooming lens group is positioned between the front fixed lens group and the rear fixed lens group; during long-focus imaging, the zooming lens group is positioned outside a light path between the front fixed lens group and the rear fixed lens group; and during zooming imaging, the zooming lens group moves parallelly and linearly cuts in the light path between the front fixed lens group and the rear fixed lens group through a control mechanism, and the central optical axis of the zooming lens group coincides with that between the front fixed lens group and the rear fixed lens group. The zoom infrared optical system, the zooming device and the manufacturing method thereof have the advantages that: due to the adoption of the linearly cut-in zooming mode, the multi-gear zooming infrared optical system overcomes the defect of the traditional zooming mode, can effectively enhance the operating distance and the resolving capability of the system and realize multi-gear focus and field-of-view.

The invention relates to an ultra-short-focal projection objective lens. The ultra-short-focal projection objective lens includes a lens group with positive focal power, a reflector with negative focal power, and a display chip; the lens group includes a first sub lens group, a diaphragm and a second sub lens group; and light reflected by the display chip passes through the lens group, and is reflected to a specified screen through the reflector, and therefore, a clear image can be formed. The ultra-short-focal projection objective lens of the invention has the advantages of fewer adopted lenses, simple structure, ultra low projection ratio, ultra low distortion, moderate size, moderate tolerance, excellent techniques and the like.

A zoom lens, of which effective focal length is fw being about wide angle mode. And the invention has first battery of lens, second battery of lens and third battery of lens from image side by order. First battery of lens has negative effective power, of which effective focal length is f1. 2.1<|f1 / fw|<2.6. First battery of lens includes first lens and second lens. First battery of lens has first negative power and at least first aspheric concave mirror surface. Second lens has first positive power. Second battery of lens has first positive effective power, of which effective focal length is f2. 1.5<|f2 / fw|<1.8. Second battery of lens includes third lens and fourth lens. Third lens has second positive power and at least a second aspheric mirror surface. Fourth lens has third positive power. Third battery of lens has second positive effective power.

The invention discloses an eyepiece and spectacles equipped with eyepieces. The eyepiece includes a first lens part (1) and a second lens part (2). The first lens part (1) is connected with a second lens part (2). An integral view field angle of the eyepiece is formed by the view field angle of the first lens part (1) and the view field angle of the second lens part (2). The spectacles equipped with the eyepieces include a frame (3). The frame (3) includes a plurality of eyepiece holding racks (4) and bridge parts (5) connected to adjacent eyepiece holding racks (4); and at least two eyepiecesarranged in the eyepiece holding racks (4). The invention solves technical problems of large lens number and narrow view field angle due to coaxial arrangement of a plurality of lens in the prior art.

Provided are a zoom lens system, an image-capturing device, and a camera. The zoom lens system comprises lens groups at least including, in sequence from the object side to the image side, a first lens group having positive power, a second lens group having negative power, and a third lens group having positive power. Any one of the lens groups includes a lens element having a reflective surface which bends the light rays coming from the object. The first lens group and the third lens group do not move along the optical axis in zooming from the wide-angle end to the tele-photo end in an image-capturing operation. The zoom lens system satisfies the conditions of 4.25< [square root of] (fW*fT) / tG2 < 10.0 and fT / fW > 2.5 (tG2: the thickness of the second lens group, fT: the focal length of the entire system at the tele-photo end, fW: the focal length of the entire system at the wide-angle end).

The invention provides a projection device which comprises an image generation device and a projection lens. The projection lens is arranged between a light valve of the image generation device and a projection screen, and the projection lens comprises a plurality of lenses. The lenses comprise a first lens, a second lens and a third lens which are aspherical lenses. The effective focal length ofthe projection lens is between 5mm and 8mm, and the sum of the effective focal length millimeter value of the projection lens and the lens number is between 14 and 17. According to the invention, theprojection device can achieve the effects of short focal length and large projection angle, thus the lens number of the projection device can be effectively reduced and the problem of overweight projection device can be further solved.

The invention relates to the technical field of lenses, in particular to an optical imaging lens. The optical imaging lens comprises a first lens, a second lens, a third lens and a fourth lensalong anoptical axis from an object side to an image side sequentially, wherein the first lens is a meniscus lenswith negative refractive index; the second lens is a meniscus lens with positive refractive power; the third lens is ameniscus lens with negative refractive power, and the object side surface and the image side surface of the third lens are aspheric surfaces; the fourth lens has positive refractive index, the object side surface of the fourth lens is convex, and the object side surface and the image side surface of the fourth lens are aspheric; the third lens and the fourth lens are both made of a plastic material. The optical imaging lens has the advantages of total optical length, low cost, large aperture, low distortion and high resolution when used at close object distance.

The present invention discloses a transmission-type digital imaging system design method. A transmission-type digital imaging system is composed of an optical imaging system and a digital processing system. Aberration which is not easy to compensate through digital processing is left to be corrected through optical design while aberration which is easy to compensate through digital processing is corrected through an image processing algorithms, such that optical design does not need to correct all the aberration, and, that is, a digital processing system is used for replacing parts of lenses to correct the aberration, thereby reducing the amount of lenses of a transmission-type optical lens and lowering complexity of the whole system. The method comprises establishing an optical imaging system model to acquire an optical imaging transfer function, establishing a digital processing system model to acquire a digital processing transfer function, establishing an imaging target prior model to restrain digital processing, and establishing an optimizing index function model to link the digital processing transfer function and the optical imaging transfer function to acquire a aberration-corrected digital image.

The invention discloses an optical system and a projection device. The optical system sequentially comprises a display unit, a first lens group and a steering lens along a light transmission direction, wherein the first lens group has positive focal power; the light incident surface and / or the light emergent surface of the steering mirror are / is of a curved surface structure. The invention provides the optical system and projection device, and aims to solve the problems of large size and heavy weight of an optical system in augmented reality equipment in the prior art.

The invention relates to a working distance-variable self-focusing OCT endoscope. The endoscope comprises a shell, an OCT endoscope lens cavity and a micro motor, wherein the OCT endoscope lens cavityand the micro motor are arranged in the shell; an optical device is arranged in the OCT endoscope lens cavity and is used for outputting focused laser beams to penetrate the shell to irradiate a sample tissue, receiving reflected light of the sample tissue at the same time and outputting an signal; and the micro motor is connected with the inner wall of the shell and the OCT endoscope lens cavitythrough a lead screw sliding block to adjust the posture of the OCT endoscope lens cavity. By utilizing near-infrared laser signals emitted and received through optical coherence tomography as a basis for regulating a working distance of the endoscope, working distance-variable self-focusing optical coherence tomography imaging is realized, and an out-of-focus phenomenon and an image distortion phenomenon which are caused due to uneven surfaces of biological tissues and non-uniform surfaces of intestinal tissues are solved.

The invention provides an optical path configuration eliminating a cold image of an infrared continuous zooming optical system. A front group of hollow object lenses, a zooming lens group, a compensation lens group, a fixed lens group, a convergent lens group and a detector form a long focal length segment of the continuous zooming optical system; the zooming lens group, the compensation lens group, the fixed lens group, the convergent lens group and the detector form a short local length segment of the continuous zooming optical system; when the zooming lens group and the compensation lens group are placed in the positions A1B1, an optical path of the long focal length end of the long focal length segment is formed; when the zooming lens group and the compensation lens group are placed in the positions A2B2, an optical path of the short focal length end of the long focal length segment is formed; when the zooming lens group and the compensation lens group are placed in the positions A3B3, an optical path of the long focal length end of the short focal length segment is formed; and when the zooming lens group and the compensation lens group are placed in the positions A4B4, an optical path of the short focal length end of the short focal length segment is formed. According to the invention, the long focal length segment and the short focal length segment are used for continuous zooming, configuration of the front group of hollow object lenses separates optical paths of the long focal length segment from those of the short focal length segment, the infrared high-zooming-ratio continuous zooming optical system is realized, cold reflection of the short focal length segment of the optical system is inhibited effectively, images are kept clear in the whole zooming process, and high image quality is obtained.

The invention discloses an ultra-compact type continuous zooming medium-wave infrared optical system. A secondary imaging structural form is adopted; the secondary imaging assembly can compress the aperture of the front group lens; the 100% cold diaphragm efficiency is achieved; a silicon substrate diffraction element is used; structure is greatly simplified, the absolute length is only 110 mm, and good imaging quality can be achieved. The system comprises a front group and a rear group, wherein the front group comprises a front fixed group, a zoom lens, a compensation lens, a focusing lens and the like; the rear group comprises two lenses, the lenses are made of common materials of silicon and germanium for an infrared optical system, the zoom lens and the compensation lens move back andforth along an optical axis in the zooming process to achieve the purpose of continuous zooming, the focal length range of the optical lens is 70mm-240mm, and the F number is 4. The lens is suitable for a high-resolution 640 * 512 medium-wave refrigeration detector, has the advantages of being ultra-compact, small in size, light in weight, high in resolution and the like, and has good imaging quality in a full-focus section.

The invention relates to a near-to-eye display device for augmented reality and augmented reality display equipment. The near-to-eye display device comprises a display source, a collimation system and an unpolarized waveguide lens; the display source is arranged on a main optical axis of the collimation system and is used for loading and outputting an image; the collimation system is located on the light emitting surface of the display source and used for collimating and correcting the image output by the display source and then enabling the image to enter the unpolarized waveguide lens, the collimation system comprises a first lens, a second lens, a third lens and a fourth lens which are coaxially arranged in sequence from an object plane to an image plane, the first lens is a plano-convex lens, the second lens is a plano-concave lens, the third lens is a plano-convex lens, and the fourth lens is a plano-convex lens; and the unpolarized waveguide lens is arranged on the emergent light path of the collimation system and is used for coupling the coupled light to human eyes. According to the technical scheme, the lighting effect of the waveguide lens is improved, and the final in-eye brightness is improved.

The invention provides a projector which is used for projecting an image onto a screen. The projector comprises a light source used for providing light, an imaging unit used for receiving the light, and a projection lens arranged between the imaging unit and the screen to project the light onto the screen, wherein the projection lens comprises a first lens assembly and a second lens assembly, the first lens assembly is close to the screen and comprises a first lens, a second lens and a third lens, the first lens, the second lens and the third lens all have negative diopters, the first lens is an aspherical lens close to the screen, the second lens is located between the first lens and the third lens, the second lens assembly has a positive diopter and is close to the imaging unit, the effective focal distance of the projection lens is f, the focal distance of the first lens assembly is f[G1], the focal distance of the first lens is f[L1], the focal distance of the second lens is f[L2], the focal distance of the third lens is f[L3], 0.75<= / f[G1] / / f<=1.28, and the relationship between f[L1], f[L2] and f[L3] meets the inequation as described in the specification.

The invention discloses a photographic device and electronic equipment, the photographic device comprises a photosensitive chip (100), a lens mechanism (200), a diffraction structure (310) and an optical filter (320), the diffraction structure (310) and the optical filter (320) are sequentially arranged between the lens mechanism (200) and the photosensitive chip (100), and ambient light passing through the lens mechanism (200) can be diffracted by the diffraction structure (310). The diffracted ambient light is projected to the photosensitive chip (100) through the optical filter (320). According to the scheme, the contradiction between the thickness of the electronic equipment and the size of the camera device in the background technology can be solved.

The invention discloses a projection lens and a projection device. The projection lens is applied to image projection of the projection device. The projection device is used for projecting an image to a screen and comprises an imaging unit. The projection lens comprises a first lens group and a second lens group. The first lens group has negative diopter. The first lens group is adjacent to the screen and is provided with a first lens which has first negative diopter. The second lens group has positive diopter. The second lens group is adjacent to the imaging unit and comprises a second lens which has second negative diopter. The abbe number of the first lens is Vd1, the abbe number of the second lens is Vd2, and 0.4<=Vd2 / Vd1<=1.2 and Vd1<50 so that image distortion can be effectively corrected and lateral chromatic aberration can be eliminated.

The invention discloses a glass and plastic mixed fixed-focus lens. The glass and plastic mixed fixed-focus lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and asixth lens, which are sequentially arranged from the object side to the image side, wherein the fourth lens is a glass spherical lens; the first lens, the second lens, the third lens, the fifth lens and the sixth lens are plastic aspheric lenses; the first lens is a convex-concave negative focal lens; the second lens is a convex-concave positive focal lens; the third lens is a convex-concave lens;the fourth lens is a double-convex positive focal lens; the fifth lens is a double-concave negative focal lens; the sixth lens is a double-convex positive focal lens; and the focal length ratio of the second lens, the fourth lens, the fifth lens and the sixth lens to the whole lens satisfies the following condition: a formula as shown in the specification. According to the technical scheme provided in the embodiment of the invention, the performance of the fixed-focus lens is not influenced while the cost is reduced.

The invention discloses an optical system and augmented reality equipment, and the optical system sequentially comprises a display unit, a third lens, a second lens and a first lens in a light transmission direction, the first lens and the third lens have positive focal power, and the second lens has negative focal power; the first lens comprises a first surface and a second surface, the first surface is of a concave aspheric surface structure, and the second surface is of a convex aspheric surface structure; the second lens comprises a third surface and a fourth surface, the third surface isof a convex aspheric surface structure, and the fourth surface is of a concave aspheric surface structure; the third lens comprises a fifth surface and a sixth surface, the fifth surface is of a convex aspheric surface structure, and the sixth surface is of a convex aspheric surface structure. The invention provides an optical system and augmented reality equipment, and aims to solve the problemsof large size and heavy weight of AR equipment in the prior art.

The invention discloses an intelligent domestic high-pixel wide-angle lens, which comprises an optical filter, a first lens system and a second lens system. The first lens system is composed of a first lens and a second lens; the first lens is a meniscus lens with negative power and its convex surface facing towards an object surface; the second lens is a double convex lens with positive power; the second lens system is composed of a third lens, a fourth lens and a fifth lens; the third lens is a double convex lens with positive power; the fourth lens and the fifth lens are bonding lenses which are bonded with each other; the first lens, the second lens, the third lens, the fourth lens and the fifth lens are coaxially arranged between the object surface and an image surface in sequence; the optical filter is arranged between the fifth lens and the image surface. According to the intelligent domestic high-pixel wide-angle lens, by means of the five spherical glass optical lenses, the angle of diagonal photographing can reach up to 160 degrees at most, the intelligent domestic high-pixel wide-angle lens has the advantages of being big in field angle and high in resolution, shooting dead corners are reduced to the greatest extent under the condition that image brightness is guaranteed, and the high-pixel wide-angle lens is suitable for intelligent domestic usage.

In order to solve a technical problem of incapability of application of a front optical system of an imaging spectrum system based on DMD coding aperture in a medium-frequency wave infrared waveband,the invention provides a DMD-based front oblique image optical system of an aperture coding spectral imager. The system comprises a first spherical mirror, a second spherical mirror, a third sphericalmirror, a fourth spherical mirror and a DMD coding device which are sequentially arranged along the same optical path. The first spherical mirror is used for limiting the beam size; the first spherical mirror and the third spherical mirror are rotationally symmetrical about the optical axis of the whole front oblique image optical system. One of the second spherical mirror, the third spherical mirror and the fourth spherical mirror is eccentric and obliquely arranged relative to the optical axis. The eccentric size is smaller than or equal to 1 / 4 of the caliber of the front oblique image optical system, and the inclination angle ranges from-24 degrees to 24 degrees; and since the DMD coding device is obliquely arranged, the included angle between the DMD coding device and the optical axisis equal to two times of the working angle of the micromirror.

The invention relates to a fixed-focus lens comprising a first lens group and a second lens group the dioptre of which are all positive, wherein, the first lens group consists of a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are arranged in order from an object side to an image side, wherein, the dioptre from the first lens to the fifth lens is orderly negative, negative, negative, positive and positive, and the first lens is an aspheric lens; the second lens group consists of two balsaming lenses and a positive lens positioned between the two balsaming lenses; the fixed-focus lens meets the following conditions: (1) FL45 is more than 5.0 and less than 7.5; (2) FG2 / F is more than 3.5 and less than 4.8; (3) FG2 / H is more than 3.755, wherein, FL45 refers tothe effective focal length between the fourth lens and the fifth lens of the first lens group; the FG2 is the effective focal length of the second lens group; F refers to the effective focal length ofthe fixed-focus lens; and H refers to the maximum image height on the image side.

The invention discloses a TOF module for a sweeping robot and the sweeping robot. The TOF module for the sweeping robot comprises a projection module and a receiving module. The projection module is suitable for being installed on a sweeping robot body and used for projecting an output light field, and the ratio of the angle of the output light field in the horizontal direction to the angle of theoutput light field in the vertical direction is greater than 10. The receiving module is suitable for being correspondingly installed on the sweeping robot body and used for receiving the reflected receiving light field, and therefore the TOF principle is applied to conduct distance measurement.

The invention discloses electronic equipment. The electronic equipment comprises an equipment shell (600), a camera device and a camera cover plate (300), wherein the camera cover plate (300) is arranged in the equipment shell (600); the camera device is arranged in the equipment shell (600); the camera device comprises a lens mechanism (200) and a photosensitive chip (100); the camera cover plate(300) comprises a diffraction structure (310), and in the direction of projecting light towards the photosensitive chip (100), the diffraction structure (310), the lens mechanism (200) and the photosensitive chip (100) are sequentially arranged; and ambient light passing through the camera cover plate (300) can be diffracted by the diffraction structure (310), and the diffracted ambient light canbe projected to the photosensitive chip (100) through the lens mechanism (200). According to the above scheme, contradiction between the thickness of existing electronic equipment and the size of a camera device can be solved.

The invention discloses an optical system and augmented reality equipment. The optical system sequentially comprises a first lens, a second lens and a third lens in a light transmission direction; thefirst lens and the fourth lens have negative focal power, and the second lens, the third lens and the fifth lens have positive focal power; the first lens, the second lens, the third lens and the fourth lens are all spherical lenses; and the fifth lens is an aspheric lens. According to the optical system and the augmented reality equipment, the problems of large size and heavy weight of AR equipment in the prior art are solved.

The invention provides a light source system and laser projection equipment, and belongs to the field of laser projection equipment, which comprises a laser light source group, stepped reflectors, condensing elements, a first reflector, a diffusion sheet group and an optical rod, the stepped reflectors are arranged on the light emitting sides of the laser light source groups, are used for reflecting light rays emitted by the laser light source groups and are in one-to-one correspondence with the laser light source groups; the condensing elements are arranged on the light emitting sides of thestepped reflectors and used for receiving and focusing light rays reflected by the stepped reflectors, and the condensing elements are in one-to-one correspondence with the stepped reflectors; the first reflector is arranged on the light outlet side of the condensing element and used for reflecting light focused by the condensing element. The diffusion sheet group is arranged on one side of the first reflecting mirror; the optical rod is arranged on the light emitting side of the diffusion sheet group. According to the light source system and the laser projection equipment provided by the invention, the light spots can be compressed only by using one condensing element pair without using additional optical elements, so that the number of lenses is greatly reduced, the size of the light source system is reduced accordingly, and the occupied space is small.