60 results about "Diaphragm (optics)" patented technology

The invention belongs to the technical field of optics. Through refraction and transmission of a spherical lens group coaxially arranged, a binocular eye pupil at an exit pupil position divides outgoing light into a left beam and a right beam in a wavefront-splitting manner, and binocular observation for a shared single display image is achieved. The single-display-shared large-exit-pupil binocular eyepiece optical system to which the invention relates is the lens groups arranged between the display and a diaphragm. The lens group is characterized in that the lens group comprises n spherical lenses which are successively and coaxially arranged, and n is a natural number not less than 3; the display is placed on a front focal plane of the lens group, and the center of the display coincides with an optical axis of the lens group; and the lens group comprises 2n optical surfaces which are (2n) and (2n+1) taking a diaphragm surface (1) as a starting point, and a display surface is (2n+2). The binocular eyepiece optical system has the advantages of simple structure, comfortable observation, reliable performance, the large exit pupil diameter and the large exit pupil distance; free observation can be performed in a certain special scope, and an object image is easy to continuously observe; the binocular eyepiece optical system can be fixed to a vehicle body and does not increase a burden of a head, and people cannot feel fatigue easily; and the binocular eyepiece optical system is suitable for a vehicle-mounted binocular observation instrument to continuously observe surrounding scenery conditions or related information.

The embodiment of the invention relates to the technical field of optics, and discloses a projection camera lens. The projection camera lens comprises a DMD chip, an equivalent prism, a galvanometer,a first refraction lens group, a diaphragm and a second refraction lens group in sequential arrangement, wherein the first refraction lens group comprises a first lens, a triple glued lens and a fifth lens in sequential arrangement; the triple glued lens comprises a second lens, a third lens and a fourth lens; and the fourth lens is an aspherical lens. The triple glued lens can realize good correction capability on spherical aberration, chromatic aberration and secondary spectrum, so that the definition of a projection image emitted from the projection camera lens is high; and the size of theprojection camera lens is small.

The invention relates to a germanium substrate 8-12 [mu] m infrared band diaphragm and a preparation method thereof, and belongs to the field of infrared optics. The diaphragm takes single crystal germanium as a substrate, and the front and back surfaces of the substrate are plated with the same infrared antireflection film system structures; and the structures of the infrared antireflection film systems on the front surface and the back surface are as follows: a substrate/0.281 Ge/0.475 ZnSe/0.4641 Ge/0.644 ZnSe/0.578 YbF3/0.126 ZnS/air. According to the principle of destructive interference and constructive interference of light, the constructive interference of light can be maximized by using a multi-layer film structure, so that the transmittance of the coated lens is maximized. In the aspect of transmittance, due to the fact that Ge, YbF3, ZnS and other coating materials have absorption in the light-transmitting wave band, and meanwhile, tensile pressure stress between the film layers also absorbs light in the wave band, the thickness of the film layers with absorption is reduced to the minimum, and meanwhile, ZnSe materials with more perfect light-transmitting performance are adopted in the second coating film and the fourth coating film, so that the transmittance is improved, and the light-transmitting effect is improved. And in the film plating process, the film layer stress is reduced by adopting the modes of ion source assistant plating and bombardment before and after ion source plating, so that the film layer strength is enhanced while the absorption is reduced, and the transmittance is improved.

The invention discloses a cascade triple frequency harmonic generating device which belongs to the field of nonlinear optics. The cascade triple frequency harmonic generating device comprises a base frequency light source system, a temperature control furnace and a multi-period cascade crystal, wherein the base frequency light source system is connected with a half wave plate, a Glan prism, an aperture diaphragm and a first focusing lens, wherein second harmonics are generated by an incident light beam through multi-period cascade, then the second harmonics and fundamental waves are subjectedto sum frequency to output triple frequency harmonic; the output light waves pass through a second focusing lens, a high reflection mirror and a bandpass filter, and then are received by a detector. According to the cascade triple frequency harmonic generating device, a frequency doubling process and a sum frequency process are integrated on a multi-period cascade crystal; by changing an action region of the multi-period cascade crystal and the fundamental waves, phase matching of two nonlinear processes can be simultaneously realized. The cascade triple frequency harmonic generating device iscompact in structure and flexible in design. Stable and efficient wideband cascade triple frequency harmonic output can be realized.

The invention provides a near-to-eye display detection lens and a near-to-eye display device, and relates to the technical field of optics. In the invention, a diaphragm is used for transmitting light; a first lens group is used for receiving and transmitting the light passing through the diaphragm, and comprises a first doublet lens for transmitting the light; a second lens group is used for receiving and transmitting the light passing through the first lens group, a third lens group is used for receiving and transmitting the light passing through the second lens group, and a photosensitive assembly is used for receiving the light passing through the third lens group. The near-to-eye display detection lens can be used for replacing manual work to observe and detect AR/VR products, the diaphragm is arranged in front to simulate a human eye structure, chromatic aberration is eliminated through the design and cooperation of double bonding lenses in the multiple lens sets, and thus the detection effect of the AR/VR product detected by the near-to-eye display detection lens is closer to the observation and detection effect of human eyes, the detection efficiency is improved, and misjudgment in the detection process is reduced.

An eyecup for an optic can include an elastic body forming an eye receiver and a viewing cavity, the elastic body configured to move between a relaxed state and a compressed state. The eyecup can include a diaphragm formed from or attached to an inner surface of the elastic body, the diaphragm including one or more flaps configured to be in a closed position when the elastic body is in the relaxed state such that the one or more flaps block sight of an optic through the viewing cavity, and to be in an open position when the elastic body is in the compressed state such that the one or more flaps allow sight of an optic through the viewing cavity. The eyecup can include one or more magnets disposed on at least one of the one or more flaps to move with the one or more flaps, and one or more sensors disposed in a fixed location and configured to sense a magnetic field or flux thereof of the one or more magnets to sense the one or more magnets when the flaps are in or near or moving toward the open position.

The invention relates to the technical field of optics, in particular to an optical aiming system, a camera module and electronic equipment. The optical aiming system comprises a diaphragm and a plurality of lens combinations. The beneficial effects of the invention are that: the optical aiming system has the advantages that the optical aiming system is long in aiming distance, high in measurementprecision and large in field angle, high-precision measurement of the aiming distance within the range from 0.5 m to 100 m can be achieved, the half field angle can reach 16 degrees, dispersion spotsunder all the field angles and all the aiming distances are uniform, roundness is good, and chromatic aberration and aberration are small; and (2) the structure is small and compact, a non-glued separated structure is adopted, the system comprises five lenses, the total length of the system is less than 20mm, and the maximum clear aperture is less than 10mm.

The invention relates to the technical field of atmospheric optics, and in particular relates to a system for realizing integrated observation of sun and sky radiation and a self-calibration method. The system comprises a supporting frame, an entrance pupil diaphragm is arranged on the supporting frame, a first window lens is arranged on the entrance pupil diaphragm, an attenuation piece is fixed to the center of the side face, close to a detector, of the first window lens, and the attenuation piece and the first window lens form an annular entrance pupil. Compared with the traditional method that two sets of receiving optical systems/two sets of measuring equipment are used for observing the sun to measure the atmospheric transmittance, the water vapor column content and the sky background radiance, the system provided by the invention has the advantages that the detection of two signals with different intensities is realized by adopting an annular entrance pupil and utilizing a spatial light splitting method, so that a rotary filter wheel is not needed; the whole system is simpler in structure, and the measurement of the sky background brightness can be calibrated in real time; the size and the weight of the system are reduced, and the operability of equipment can be remarkably improved.

This invention discloses a sort of back-light module, and it consists of a frame, several lamp-houses and an optics diaphragm. The frame has an underside and several profiles, and this underside which connects with the profile has several cores. This lamp-house corresponds to the core and it is fixed in the frame respectively, but the optics diaphragm is fixed above the frame and it locates above the lamp-house.

The invention relates to the field of optics, in particular to a zoom lens and an imaging device.The zoom lens sequentially comprises a first lens group with positive focal power, a second lens group with negative focal power, a third lens group with negative focal power, a diaphragm and a fourth lens group with positive focal power from the object plane side to the image plane side; the second lens group and the third lens group move in the main optical axis direction of the zoom lens, and the moving directions of the second lens group and the third lens group are the same; the zoom lens satisfies the following conditional expressions: TTL < 100 mm; FNO is less than 1.8; wherein TTL is the total optical length of the zoom lens, and FNO is the number of apertures of the zoom lens. According to the technical scheme, the zoom lens with a small size is realized, meanwhile, a large aperture number can be realized, the shooting effect of the zoom lens in a low-illumination environment is improved, and the user experience is improved.

The embodiment of the invention relates to the technical field of optics, and discloses a projection lens. The display module comprises a display chip, an equivalent plate lens, a first refraction lens group, a diaphragm and a second refraction lens group which are arranged in sequence, the first refraction lens group comprises a first refraction lens and a dual-bonded lens, wherein the dual-bonded lens comprises a second lens and a third lens, the total length of the projection lens is smaller than 32mm, the field angle is 65 degrees, the depth of field at the projection distance of 400 mm can reach +/-170 mm, the projection lens can stably output a clear image during close-range projection, and the use feeling of a user is good.

The invention discloses a magneto-optic diaphragm, a magneto-optic sensor, a weld joint detection device and a weld joint detection method, thereby solving problems that in the prior art, the magneto-optical image quality is not high, the light source irradiation area is small, two-dimensional scanning is needed, and the welding seam defect detection precision is not high. The upper surface and the lower surface of the magneto-optic diaphragm are plated with reflecting films, a linear light source is used as a polarized light source, the detection precision and resolution of the magneto-opticsensor are enhanced, and the weld defect detection effect is improved. According to the technical scheme, the magneto-optic diaphragm comprises a magneto-optic dielectric layer; a first reflecting layer is arranged on one side of the magneto-optic dielectric layer, and a second reflecting layer is fixed to the other side of the magneto-optic dielectric layer; and the second reflecting layer cooperates with the first reflecting layer to increase the reflection times of the polarized light.

The invention relates to the technical field of aerospace optics, and provides a rectangular field diaphragm installation and alignment device and alignment method of a coaxial optical system. The device comprises a platform, a collimator fixed on the platform, a theodolite, an image acquisition system, a detector supporting tool fixed on a five-dimensional detector adjusting frame, a large-target-surface detector mounted on the detector supporting tool, and an optical system mounting reference tool for fixing the five-dimensional detector adjusting frame, and an optical system and a cubic prism which are fixed on the optical system mounting reference tool. The invention provides a rectangular field diaphragm installation and alignment device and method of the coaxial optical system, wherein the device and method can realize accurate alignment of a rectangular detector and a rectangular field diaphragm at a primary image surface of primary and secondary mirrors of the coaxial optical system.

The invention discloses a z scanning measurement device and method for measuring a nonlinear optical coefficient, and the device comprises a laser transmitting device disposed at one side of an electric displacement platform, and a laser receiving device and a spectrum detection device which are disposed at the other side of the electric displacement platform. The laser emitting device comprises a laser, a first spectroscope, a continuously adjustable attenuation sheet, a first convex lens, a concave lens, a first reflecting mirror, a second reflecting mirror and a second convex lens which are arranged in sequence; the laser receiving device comprises a second spectroscope, a third spectroscope and a third reflector which are arranged in parallel, a diaphragm, a first attenuation piece and a first detector are sequentially arranged behind the second spectroscope, a fourth convex lens, a second attenuation piece and a second detector are sequentially arranged behind the third reflector, and the spectrum detection device comprises a third convex lens and a spectrograph. According to the invention, measurement work of two properties of nonlinear optics and emission spectrum can be completed at one time, time and cost are saved, and noise caused by instability of the laser and the like is reduced.

The invention relates to the field of optics, in particular to a movie lens and an image pickup device. The movie lens sequentially comprises a first lens group with positive focal power, a second lens group with negative focal power, a diaphragm, a third lens group with positive focal power, a fourth lens group with negative focal power and a fixed lens group with positive focal power from an object plane side to an image plane side. The first lens group, the second lens group, the third lens group and the fourth lens group move along the optical axis direction of the movie lens. Through the arrangement of the structure, the zooming function of the movie lens is realized, and in the zooming process, the imaging brightness, the imaging quality, the color rendition and the relative illuminance under each focal length are reduced, so that the movie lens is difficult to perceive in the zooming process, and the imaging quality of the movie lens is improved.

The invention discloses a high-definition zoom lens and a security camera device, and relates to the technical field of optics. The zoom lens sequentially comprises a first fixed lens group with positive focal power, a zoom 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 a third fixed lens group with positive focal power from an object plane side to an image plane side, the amount of movement of the zoom lens group satisfies the following conditional expressions: [delta]B1/TTL belongs to(0.15, 0.35), wherein [delta]B1 is the relative displacement of the zoom lens group at the wide-angle end and the telescopic end, and TTL is the total length of the high-definition zoom lens; and thefocusing lens group moves in the optical axis direction and is used for compensating the moving zoom lens group. The change range of the relative displacement of the zoom lens group is large, that is, the zoom range of the high-definition zoom lens is large, and the application range of the high-definition zoom lens is wide.

The invention relates to a sawtooth diaphragm, application of the sawtooth diaphragm and a method for debugging a light path of the sawtooth diaphragm, and belongs to the technical field of optics. A circular sawtooth structure, a first annular sawtooth structure and a second annular sawtooth structure are sequentially etched on the optical plane of the sawtooth diaphragm from inside to outside. A first annular sawtooth structure and a second annular sawtooth structure are adopted to represent the near-field edge position of a laser beam, an image with a clear and bright edge annular band and a bright center position is formed in the near field of the laser beam, the image is obviously compared with a light-proof area, observation measurement and light path adjustment are facilitated, meanwhile, formal reflection field drawing development and repeated verification are not needed, the time is saved, and the debugging efficiency is high, simple and convenient.

The invention belongs to the field of infrared optics, and particularly discloses a low-distortion large-relative-aperture refrigeration type athermalization infrared wide-angle optical system, which comprises a front fixed lens group, an aberration correction group and a detector which are sequentially, coaxially and fixedly connected and arranged from an object plane to a focal plane. The detector comprises a detector protection window, a detector cold diaphragm and a focal plane which are sequentially arranged from an object plane to the focal plane along the the optical axis direction, and the position of the optical system aperture diaphragm coincides with that of the detector cold diaphragm; the front fixed lens group is of a single lens structure, consists of a first negative lens and is made of silicon. The aberration correction group is a three-separation lens group, a first positive lens, a second negative lens and a second positive lens are sequentially and coaxially arranged in the direction of the optical axis from the object plane to the focal plane, and are made of a chalcogenide material. The optical system provided by the invention adopts a common infrared optical material, can realize excellent imaging in a medium-wave infrared band range, and can well correct aberration associated with a large view field and a large aperture; and the optical system is easy to manufacture, high in imaging quality and good in stability.

The invention provides a two-dimensional large-field-of-view imaging plane symmetric free-form surface optical system, and relates to the technical field of optics, a first reflector, a second reflector, a third reflector, a fourth reflector and a detector image plane are sequentially arranged in the light path direction, an aperture diaphragm is further arranged, and the position of the aperture diaphragm coincides with the position of the second reflector; the light enters the first reflector, enters the second reflector after being reflected by the first reflector, enters the third reflector after being reflected by the second reflector, enters the fourth reflector after being reflected by the third reflector, and enters the detector image surface for imaging after being reflected by the fourth reflector. The optical system adopts four free-form surface reflectors with symmetrical planes, the four free-form surface reflectors are arranged according to the negative-positive-positive-positive-positive distribution mode of focal power, the inclination angle of the reflectors meets the requirement of anastigmatism, near-diffraction-limit imaging in a 18-degree * 9-degree two-dimensional view field is achieved, distortion correction can be achieved in the infrared band of 3-5 microns through system design, and the resolution ratio of the system is greatly improved. The imaging quality is close to the diffraction limit.

The invention discloses a detector optical machine assembly integrated with a photosensitive surface conjugate diaphragm, which is structurally characterized in that a photosensitive surface (2) of a detector (1) and a diaphragm aperture (5) of a diaphragm (4) are respectively positioned on an object surface and an image surface of a projection optical system (3) and are in one-to-one correspondence according to an imaging relationship. The detector (1), the projection optical system (3) and the diaphragm (4) are assembled on the same mounting structure (6) to form an integral optical machine assembly; the device is simple in structure, easy to install and adjust, accurate in object-image relation and firm and reliable in whole, the small hole can filter out adverse effects generated by external stray light, and the size of a detection area can be adjusted and the receiving view field of the photosensitive unit can be changed by configuring the sizes of the projection optics (3) and the diaphragm small hole (5) and system parameters; and the light source can be used as a receiving optical axis basis for the optical axis adjustment of the active photoelectric system, so that the subsequent complete machine adjustment is facilitated.

The invention discloses a large-view-field hemispherical airspace fisheye lens system and belongs to the technical field of optics. The large-view-field hemispherical airspace fisheye lens system comprises a front lens group with negative focal power and a rear lens group with positive focal power in sequence from an object side to an image side along the direction of an optical axis; the front lens group sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power and a fifth lens with positive focal power from the object space to the image space in the direction of the optical axis; and the rear lens group sequentially comprises a sixth lens with positive focal power, a seventh lens with positive focal power, an eighth lens with negative focal power, an aperture diaphragm, a ninth lens with positive focal power, a tenth lens with negative focal power, an eleventh lens with negative focal power and a twelfth lens with positive focal power from the object space to the image space in the direction of the optical axis. The imaging quality can meet the requirements through a mode that the aberration of the front lens group and the aberration of the rear lens group are mutually balanced.

The invention discloses a distortion-eliminating ultra-micro nano optical system based on a pixel-level polaroid, and relates to the technical field of space optics. The distortion-eliminating ultra-micro nano system solves the problems that an existing satellite-borne ocean remote sensing system is high in implementation cost, complex in structure, incapable of achieving real-time observation and the like. The system comprises a ground correction lens and spaceflight anti-radiation lens set, a double-Gaussian imaging lens set, an image quality correction lens set and a pixel-level detector, wherein part of stray light is filtered by a light beam emitted by a target through an outer light shield, the light beam is finally imaged and received at the pixel-level polarization detector through the imaging lens set and the image quality correction lens set, and polarization image information of four ocean targets of 0 degree, 45 degrees, 90 degrees and 135 degrees of the target is obtained by a receiving image surface; and the optical system is provided with a field diaphragm, an inner light shield and an outer light shield. The optical system is designed into a form of double Gaussian objective lenses, the total length of the optical system is strictly controlled, space on a satellite is saved when the optical system is used for satellite-borne imaging, the camera quality is reduced, and the emission cost is saved.

The invention provides a high-resolution large-breadth multispectral noctilucent remote sensing system, and belongs to the technical field of space optics. The system comprises a double-Gaussian optical system, a gradual filter and a large-area-array imaging detector, and the double-Gaussian optical system is an image space telecentric system and comprises a front lens group, an aperture diaphragm and a rear lens group which are coaxially arranged in sequence; the gradual filter comprises eight single-color spectrum sections and a full-color spectrum section, and the eight single-color spectrum sections are distributed from 400-1000 nm; and the optical system can meet the requirements of visible light-to-short wave infrared band imaging and multispectral detection. Due to the characteristics of the system, the system not only can realize a noctilucent remote sensing function, but also can carry out multispectral detection in the daytime by adjusting parameters of the imaging detector, and is used for mineral exploration, water quality monitoring and the like.

The invention relates to the field of optics, in particular to a turn-back type zoom lens and an unmanned aerial vehicle. The turn-back zoom lens is composed of a fixed lens group with positive focal power, a first zoom group with negative focal power, a focusing lens group with negative focal power, a diaphragm, a second zoom group with positive focal power and a reflection assembly from an object plane side to an image plane side. The first zoom group, the focusing lens group and the second zoom group move along the main optical axis of the turn-back zoom lens; the foldback zoom lens satisfies the following conditional expressions: TTL < 75 mm; l is less than 55 mm; wherein TTL is the total optical length of the turn-back type zoom lens, and L is the length of the turn-back type zoom lens in the main optical axis direction. The total optical length of the turn-back type zoom lens is further reduced, the size of the turn-back type zoom lens is reduced, and the application range of the turn-back type zoom lens is widened.