60 results about "Diaphragm (optics)" patented technology

The invention discloses a deep ultraviolet spherical catadioptric detection objective lens, and relates to the technical field of optics, the deep ultraviolet spherical catadioptric detection objective lens comprises a first lens group, a second lens group and a diaphragm, one side of the first lens group is arranged to be an object plane, the first lens group is located between the second lens group and the object plane, the first lens group is used for converging light and correcting residual aberration of the second lens group, and the diaphragm is arranged between the second lens group and the object plane. The diaphragm is arranged in the middle of the second lens group, and the second lens group and the diaphragm are used for correcting vertical axis aberrations such as coma of the system. The objective lens adopts a spherical catadioptric structure, can realize deep ultraviolet band application, has a large numerical aperture, the numerical aperture can reach 0.8, the smaller wavelength and the larger numerical aperture have higher resolution, so that smaller defects can be detected, the working distance can be greater than 10mm, and the detection precision is improved on the basis of realizing the large NA design. The length of the system is reduced, the number of original parts is reduced, only five lenses are needed, the structure is simple, and installation and detection are convenient.

The invention belongs to the technical field of optics, and particularly relates to an optical lens and electronic equipment. The optical lens comprises an aperture diaphragm and a plurality of lenses which are sequentially and coaxially arranged from an object side to an image side, the side, facing the object side, of the aperture diaphragm is provided with the plurality of lenses, and a diaphragm front lens group is formed; one side, facing the image side, of the aperture diaphragm is provided with a plurality of lenses to form a diaphragm rear lens group; the number of the lenses of the diaphragm front lens group is the same as that of the lenses of the diaphragm rear lens group, and distortion is offset symmetrically, so that reduction of optical distortion of the optical lens is facilitated; the diaphragm front lens group has negative focal power, the diaphragm rear lens group has positive focal power, the diaphragm front lens group and the diaphragm rear lens group form aberration compensation, and the imaging performance of the optical lens is improved. The lens closest to the object side has the positive focal power so as to converge off-axis light beams with a large angle, the large field angle of the optical lens is achieved, meanwhile, the clear aperture of a light path is reduced, and then miniaturization of the light path structure is achieved.

The invention relates to the technical field of optics, in particular to a projection lens, a projection system and electronic equipment. The projection lens comprises a first lens group, an aperture diaphragm and a second lens group which are sequentially arranged from a projection surface to an image source surface along an optical axis, the first lens group has negative focal power, and the second lens group has positive focal power; the first lens group consists of a first lens, a first sub-lens group and a diaphragm front lens which are sequentially arranged from a projection surface to an image source surface along an optical axis; the first sub-lens group comprises at least one lens with negative focal power; the first lens and the diaphragm front lens respectively have positive focal power, and the first sub-lens group has negative focal power; the second lens group consists of a diaphragm rear lens and a second sub-lens group which are sequentially arranged from the projection surface to the image source surface along the optical axis; the second sub-lens group has positive focal power and comprises a group of balsaming lenses with positive focal power, and the diaphragm rear lens has negative focal power. The focusing range of the projection lens is larger than or equal to 500 mm.

The invention discloses a nonlinear chirped fiber grating preparation structure based on speed regulation and control, and belongs to the field of laser technology and nonlinear optics. Comprising a light source displacement control scheme, a phase mask plate displacement control scheme and a grating inscribing and monitoring scheme. The optical, electrical and mechanical devices comprise a laser light source, a diaphragm, a plano-concave mirror, a plano-convex mirror, a cylindrical lens, an electric control displacement platform, a control program, a signal generator, a function editor, a precise displacement platform, an optical isolator, an optical circulator, a photosensitive optical fiber and an optical fiber analyzer. According to the non-linear chirp fiber grating preparation scheme based on speed regulation and control, the adjustable displacement speed is introduced while the uniform phase mask plate is used, flexible chirp regulation and control are achieved while simple and stable preparation is guaranteed, the preparation scheme of the non-linear chirp tube fiber grating is widened, and the preparation cost is reduced.

The invention provides a deep ultraviolet infinite imaging detection objective lens, belongs to the technical field of optics, and solves the problem that tiny defects in a semiconductor device are difficult to discover, the objective lens comprises a first lens group, a diaphragm, a second lens group and a third lens group which are sequentially arranged from an object plane in the optical axis direction, the first lens group has positive focal power, and the second lens group has negative focal power. Comprising a first meniscus lens, a second meniscus lens, a third meniscus lens, a fourth meniscus lens, a fifth meniscus lens and a sixth meniscus lens. The second lens group has positive focal power and comprises a seventh meniscus lens, an eighth meniscus lens, a ninth meniscus lens, a first biconvex lens and a second biconvex lens; the third lens group has negative focal power and comprises a first biconcave lens, a tenth meniscus lens, a second biconcave lens and an eleventh meniscus lens, and finally light emitted from the third lens group is parallel light. According to the invention, the change of different multiplying power can be realized, the method is suitable for a deep ultraviolet wave band with a very short wavelength, the numerical aperture is larger, and the resolution is higher.

The invention provides a spectral radiance source and a spectral radiance calibration method, and relates to the technical field of optics, the spectral radiance source comprises a first integrating sphere, a second integrating sphere, an optical fiber, a hollow connecting column, a baffle plate and a light source; the second integrating sphere is arranged in the first integrating sphere and is connected with the first integrating sphere through a hollow connecting column; the optical fiber is arranged in the hollow connecting column, one end of the optical fiber is connected with the light source, and the other end of the optical fiber is arranged at a light inlet hole in the second integrating sphere; and the baffle plate is arranged between the light inlet hole in the second integrating sphere and the second light outlet hole. According to the spectral radiation brightness source and the spectral radiation brightness calibration method provided by the invention, the surface uniformity and the angle uniformity of the light emitted by the spectral radiation brightness source can be improved through multiple reflections of the light under the condition that a diaphragm is not required to be arranged and / or the volume of the integrating sphere is not required to be increased, the influence on the spectral radiation brightness of the spectral radiation brightness source is small, and the calibration accuracy is high. Lambert characteristics of light emitted by the spectral radiation brightness source can be improved.

The invention discloses a fixed-focus optical system and a vehicle-mounted lens, and relates to the technical field of optics, and the fixed-focus optical system is provided with an object side and an image side which are oppositely arranged in the direction of an optical axis. The fixed-focus optical system is composed of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and an image plane which are sequentially arranged from the object side to the image side. The fixed-focus optical system can realize high resolution, small distortion, bright picture and better imaging effect.

The utility model belongs to the technical field of optics, and particularly provides a diaphragm adjusting device which comprises a base and a diaphragm. The base is connected with a bracket; the bracket is provided with a mounting through hole; the diaphragm is movably mounted in the mounting through hole; the support is provided with an adjusting assembly used for driving the diaphragm to move in the installation through hole, and the moving direction of the diaphragm in the installation through hole is parallel to the vertical plane of light beam propagation. According to the diaphragm adjusting device provided by the utility model, complicated X-axis and Y-axis adjusting mechanisms are omitted, and the diaphragm adjusting device is small in size, low in cost and convenient to use. The position of the diaphragm can be determined only through the adjusting screw and the elastic plunger, the diaphragm slides along the matching surface of the diaphragm base when the adjusting screw is adjusted, and high-precision adjustment of the diaphragm is achieved. In addition, the light passing area of the diaphragm can be polished and chamfered, the damage threshold value of the diaphragm is increased, the aperture can be made smaller, and the volume of a fundamental mode is limited.

The invention relates to the technical field of optics, and discloses a wide-viewing-angle wavefront sensing device, which constructs an image space telecentric light path through the combination of a diaphragm and a lens group and the arrangement of the diaphragm at the object space focus of the lens group, so that the wavefront of large-angle incidence becomes the wavefront of the incidence of main light rays vertical to a micro lens array after passing through the image space telecentric light path, and the wavefront of the incidence of the main light rays vertical to the micro lens array is formed. The photoelectric sensor is located on the focal plane of the micro-lens array, so that after incident wavefronts at different angles are incident through the diaphragm and are refracted by the lens group, main light rays of the refracted incident wavefronts are vertically and orthogonally incident into the plane of the micro-lens array, are segmented by the micro-lens array and then are transmitted forwards; focusing light spots corresponding to incident wavefronts are formed on the photoelectric sensor, so that the angle detection range of the wavefront sensor is expanded, the wavefront reconstruction precision is improved, and wavefront information of incident light beams in a large field of view is measured at the same time.

The invention belongs to the technical field of optics, and particularly relates to a device and method for preparing a preset grafting perfect vector vortex light generator. According to the invention, laser output by a single longitudinal mode laser passes through a beam expanding lens barrel and a polarization beam splitter and then is divided into crop light and reference light; object light passes through a space phase encoding module, a first half-wave plate, a Q-wave plate and a Fourier plane filtering module and then interferes with reference light passing through a reflector, a second half-wave plate and a fan-shaped diaphragm in a photo-induced anisotropic medium, and a spliced hologram is recorded through two times of exposure; and the medium is read by using p polarized light meeting the Bragg condition, so that the grafting perfect vector vortex light of the preset Pancharatnam topological charge and the polarization order can be reconstructed. The system is compact in structure, low in cost and high in integration degree.

The invention relates to the field of optics, in particular to a zoom lens and an imaging device. The zoom lens is sequentially composed of a first fixed lens group with positive focal power, a first zoom lens group with negative focal power, a second zoom lens group with positive focal power, a diaphragm, a focusing lens group with negative focal power, a fixed anti-shake lens group with negative focal power and an auxiliary zoom lens group with positive focal power from the object plane side to the image plane side. Each of the first zoom lens group, the second zoom lens group and the auxiliary zoom lens group comprises at most one aspheric lens; through a multi-group linkage mode, large-magnification zooming of the zoom lens is realized, miniaturization of the zoom lens is realized at the same time, the zoom lens is convenient to carry, the possibility of shaking the zoom lens by a worker is reduced, the setting of the fixed anti-shake lens group further reduces the possibility of image shaking after the worker shakes the zoom lens, and the working efficiency is improved. And the imaging stability of the zoom lens is improved.

The invention discloses a fixed-focus optical system and a DLP projector, and relates to the technical field of optics, and the fixed-focus optical system is provided with an image side and an object side which are oppositely arranged in the direction of an optical axis. The system is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a diaphragm, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, an equivalent prism and a micromirror array which are sequentially arranged from the image side to the object side. The fixed-focus optical system has the advantages of large visual angle, short focal length, high definition, low distortion and better imaging effect.

The invention discloses a fixed-focus optical system and a security lens, and relates to the technical field of optics, and the fixed-focus optical system is provided with an object side and an image side which are oppositely arranged in the direction of an optical axis. The fixed-focus optical system is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a diaphragm, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a photosensitive chip which are sequentially arranged from the object side to the image side. The fixed-focus optical system can realize infrared confocal, and is high in resolution, bright in picture and better in imaging effect.

The invention discloses a fixed-focus optical system, which relates to the technical field of optics and is provided with an object side and an image side which are oppositely arranged along the direction of an optical axis. The fixed-focus optical system is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a diaphragm, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens and a photosensitive chip which are sequentially arranged from the object side to the image side. The fixed-focus optical system is high in resolution, low in temperature drift, small in size, bright in picture and better in imaging effect.

The invention discloses a zoom optical system and a security lens, and relates to the technical field of optics, the zoom optical system is provided with an object side and an image side which are oppositely arranged along the direction of an optical axis, and the zoom optical system comprises a first lens group, a diaphragm, a second lens group and an image surface which are sequentially arranged from the object side to the image side; wherein the focal power of the first lens group is negative, the focal power of the second lens group is positive, and at least one of the first lens group and the second lens group can move along the direction of the optical axis, so that the zoom optical system is zoomed. Through reasonable arrangement of structures and positions of the first lens group with negative focal power and the second lens group with positive focal power, the zoom optical system has the effects of large target surface, large aperture and small size.

The utility model discloses a fixed-focus optical system and a security lens, and relates to the technical field of optics, and the fixed-focus optical system is provided with an object side and an image side which are oppositely arranged along the direction of an optical axis. The fixed-focus optical system is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a diaphragm, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a photosensitive chip which are sequentially arranged from the object side to the image side. The fixed-focus optical system can realize infrared confocal, and is high in resolution, bright in picture and better in imaging effect.

The invention discloses a large-aperture lens, and relates to the technical field of optics, and the large-aperture lens sequentially comprises a front lens group, a filter lens group, a first single lens and a first lens group from an object side to an image side. The filter group lens comprises a variable diaphragm; the front group lens has positive focal power, and the front group lens and the filter group lens are fixedly arranged; the first single lens has positive focal power, and the position of the first single lens can move in the optical axis direction; the first lens group has positive focal power, and the position of the first lens group can move in the optical axis direction; when an object is focused from an infinite distance to a close distance, the first single lens and the first lens group are moved along the direction of the optical axis, so that the effective focal length of the large-aperture lens is 40mm-60mm, the aperture value is less than or equal to 0.9, and the effective focal length is 2-4 times of the optical back focus. Through the above mode, the front group lens and the filter group lens are fixed, the first single lens and the first lens group are used as focusing groups, and the whole lens moves from the image side to the object side so as to acquire a large aperture value and an image plane size.

The invention relates to the technical field of electron optics, in particular to an electron optical system mobile diaphragm calibration method, system and device, computer equipment, a storage medium and a computer program product. The method comprises the following steps: in response to a diaphragm calibration request for target equipment, obtaining coordinate data of a preset detection point and corresponding electron beam intensity data; preprocessing the coordinate data and the electron beam intensity data, and generating a beam intensity distribution diagram based on the preprocessed coordinate data and electron beam intensity data; processing the beam intensity distribution diagram based on a preset image processing algorithm, and fitting to obtain geometric center coordinates of a diaphragm hole of the diaphragm to be calibrated; and executing diaphragm calibration on the target equipment by taking the geometric center coordinate as a calibration position of the corresponding diaphragm hole. By adopting the method, the diaphragm calibration efficiency and precision can be improved, and the machine efficiency is improved.

The utility model discloses a light source system and a projection device, and relates to the technical field of optics, and the system comprises a light source which is used for emitting an initial light beam; the first grating is used for adjusting the polarization direction of the initial light beam and emitting a first light beam and a second light beam with the same polarization direction and different emitting directions; the diaphragm comprises a first light incident area and a second light incident area provided with a second grating and is used for allowing light beams entering the diaphragm in the emergent direction of the first light beams to penetrate through, and the light beams with divergence angles within a preset angle range in the first light beams are projected to the first light incident area; the target light beam with the divergence angle within the preset angle range in the second light beam is projected to the second grating; and the second grating is used for adjusting the emergent direction of the target light beam into the emergent direction of the first light beam so as to enable the target light beam to enter the diaphragm. Therefore, under the condition that the optical expansion amount of the light source system is not changed or is slightly changed, the light beam energy utilization rate in the light source system is greatly improved.

The invention relates to the field of optics, in particular to a miniaturized projection lens which sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a diaphragm, a fourth lens with positive focal power, a fifth lens with positive focal power and a sixth lens with negative focal power from the object plane side to the image plane side. The seventh lens is positive in focal power; the miniaturized projection lens satisfies the following conditional expressions: 1 mm < f < 2 mm; tTL is less than 12mm; wherein f is the field angle of the miniaturized projection lens, and TTL is the total optical length of the miniaturized projection lens. Through the setting of the parameters and the structure, the miniaturization of the projection lens is realized, the projection lens can be conveniently used in a position with a narrow range, and the application range of the miniaturized projection lens is enlarged.

The application discloses a deep ultraviolet spherical catadioptric detection objective lens and relates to the technical field of optics.The deep ultraviolet spherical catadioptric detection objective lens comprises a first lens group, a second lens group and a diaphragm, one side of the first lens group is provided with an object plane, the first lens group is located between the second lens group and the object plane, the first lens group is used for converging light rays and correcting residual aberration of the second lens group, the diaphragm is arranged in the middle of the second lens group, and the second lens group and the diaphragm are used for correcting coma and other vertical axial aberrations of the system.The objective lens adopts a spherical catadioptric structure, can realize deep ultraviolet wave band application, has a large numerical aperture, the numerical aperture can reach 0.8, a shorter wavelength, a larger numerical aperture and higher resolution, so that smaller defects can be detected, the working distance can be greater than 10 mm, on the basis of realizing the large-NA design, the system length is compressed, the number of original components is reduced, only five lenses are needed, the structure is simple, and installation and detection are facilitated.

A camera lens (100), a projection apparatus (400), a display apparatus (500), and a vehicle, belonging to the technical field of optics. The camera lens (100) comprises a first lens group (10), a diaphragm (20), and a second lens group (30) which are arranged from an image side to an object side. The first lens group (10) comprises at least four lenses, and, along the direction from the image side to the object side, a first lens (11) closest to the image side in the first lens group (10) has a positive focal power, a second lens (12) has a negative focal power, a third lens (13) has a negative focal power, and a fourth lens (14) has a positive focal power. The second lens group (30) comprises at least four lenses, and, along the direction from the image side to the object side, a first lens (31) closest to the diaphragm (20) in the second lens group (30) has a negative focal power, a second lens (32) has a positive focal power, a third lens (33) has a positive focal power, and a fourth lens (34) has a positive focal power. The camera lens (100) has high definition and high reliability, and projection requirements for high definition and high reliability can be met.

The utility model discloses a fixed-focus optical system and a vehicle-mounted lens, and relates to the technical field of optics, and the fixed-focus optical system is provided with an object side and an image side which are oppositely arranged along the direction of an optical axis. The fixed-focus optical system is composed of a first lens, a diaphragm, a second lens, a third lens, a fourth lens and a photosensitive chip which are sequentially arranged from the object side to the image side. Wherein the focal power of the first lens is negative, the object side surface is a convex surface, and the image side surface is a concave surface; the focal power of the second lens is positive, the object side surface is a convex surface, and the image side surface is a convex surface; the focal power of the third lens is positive, the object side surface is a concave surface, and the image side surface is a convex surface; the focal power of the fourth lens is negative, the object side surface is a concave surface, and the image side surface is a concave surface; the fixed-focus optical system is high in resolution, low in temperature drift, small in size, bright in picture and better in imaging effect.

The embodiments of the present application belong to the technical field of optics. Provided in the embodiments of the present application are a lens, a projection apparatus, a display apparatus and a vehicle. The lens comprises a first lens group, a diaphragm and a second lens group which are arranged from an image side to an object side. The first lens group comprises at least three lens pieces, wherein, in the direction from the image side to the object side, the first lens piece, the second lens piece and the third lens piece in the first lens group closest to the image side have a negative focal power, a positive focal power and a negative focal power, respectively. The second lens group comprises at least three lens pieces, wherein, in the direction from the image side to the object side, the second lens piece and the third lens piece in the second lens group closest to the diaphragm each have a positive focal power. The lens provided in the embodiments of the present application can meet the projection requirements for high definition and high reliability.

The utility model relates to the technical field of optics, discloses a probe for an optical fiber acoustic sensor, and aims to solve the problems of phase fading and polarization fading of an F-P cavity interference type optical fiber acoustic sensor. The probe comprises a relay end, a first optical fiber head and a second optical fiber head which are embedded into a first magnetic ring and arranged at an interval are arranged in the relay end, and a first Faraday piece in the first magnetic ring is located between the first optical fiber head and the second optical fiber head; a third optical fiber head and a second magnetic ring are embedded in the sound sensing end, a second Faraday piece in the second magnetic ring is located between a diaphragm and the third optical fiber head, and the diaphragm is arranged at the tail end of the hard tubular structure to couple external sound signals; the third optical fiber head and the second optical fiber head are directly connected through a single-mode optical fiber so that an F-P resonant cavity can be formed between the end face, perpendicular to the optical axis, of the first optical fiber head and the diaphragm. And the first Faraday piece and the second Faraday piece are used for respectively rotating the polarization states of the incident light and the return light by 45 degrees.

The application relates to the field of optics, in particular to a zoom lens and an imaging device. The zoom lens is sequentially composed of a fixed lens group with positive focal length, a first variable magnification lens group with negative focal length, a diaphragm, a second variable magnification lens group with positive focal length, a focusing lens group with negative focal length and a third variable magnification lens group with positive focal length from the object plane side to the image plane side; the zoom lens satisfies the following conditional expressions: TTL < 95 mm; ft / fw > 25; wherein TTL is the total optical length of the zoom lens, ft is the focal length of the zoom lens in a telephoto state, and fw is the focal length of the zoom lens in a wide-angle state. The zoom lens can realize a large zooming range under a small volume, and the coma of the zoom lens is reduced and the imaging quality of the zoom lens is increased through the arrangement of multiple variable magnification lens groups.

This disclosure describes an apparatus including a camera module that includes an optical stack mounted above an image sensor. In an example, at least a portion of the air-gapless optical stack includes an aperture diaphragm and a first substrate having a sealed meta-optical element (MOE) thereon. A method for manufacturing the camera module is also disclosed.

The embodiment of the invention provides a lens, a projection device, a display device and a vehicle, and belongs to the technical field of optics. The lens comprises a first lens and a fixed lens group. The first lens is closest to the image side and has positive focal power. The first lens is used for moving relative to the fixed lens group along the optical axis direction of the lens. The fixed lens group comprises a first lens group, a diaphragm and a second lens group. The first lens group is located between the first lens and the diaphragm. The first lens closest to the first lens in the first lens group has negative focal power, the second lens has negative focal power, and the third lens has positive focal power. In the second lens group, the first lens closest to the diaphragm has negative focal power, the second lens has positive focal power, the third lens has positive focal power, and the fourth lens has positive focal power. Through the arrangement, the definition and reliability of the lens are high, and the cost of the lens is reduced.

The invention relates to an imaging optics for imaging at least one light source (1) onto at least one photosensitive sensor (4), said imaging optics having at least one optical diaphragm (2), at least one beam-shaping optical element (3) and at least one photosensitive sensor (4), said at least one beam-shaping optical element (3) being a plano-concave cylindrical mirror, especially a plano-concave cylindrical surface mirror.

The invention relates to a 20 million-pixel visible refractive and super lens, a camera module and a terminal device, and belongs to the field of optical lenses, the 20 million-pixel visible refractive and super lens comprises a diaphragm, a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged from an object plane to an image plane along an optical axis; wherein at least one lens is a metasurface lens, and the other lenses are non-metasurface lenses. According to the 20 million-pixel visible light refraction and super lens, the contradictory barrier between miniaturization and high performance is broken through by fusing metasurface phase regulation and traditional refraction optics, an ultra-large field angle of 90 degrees or above is achieved under the front-end aperture of 0.81 mm, 20 million-pixel high-definition imaging is synchronously supported, and the total optical length is compressed to 2.6 mm or below; the nano-structure metasurface is compatible with a semiconductor process, has the advantages of low cost and mass production, and provides a solution for miniaturization and ultrathin development of front camera modules of portable electronic equipment such as mobile phones, computers and the like.