35 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 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 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 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 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.

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.

The utility model relates to the technical field of optics, in particular to a lens with high imaging quality, which comprises a magnification lens, a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from an object plane to an image plane along the axial direction of the lens, the first lens, the second lens and the fifth lens are all concave-convex lenses, the third lens and the fourth lens are plano-concave lenses, and the sixth lens and the seventh lens are biconvex lenses. Multiple lenses are combined together to improve the imaging quality.

The invention discloses a reentry three-mirror improved Newton reflection astronomical telescope, and belongs to the technical field of optics. The three mirrors are respectively a primary mirror, a top reflecting mirror and a bottom reflecting mirror, wherein the primary mirror is a spherical toroidal mirror or a paraboloid toroidal mirror; the structure further comprises a diaphragm, an eyepiece group, a lens cone and a shell. According to the basic installation relation, the primary mirror is installed at the bottom of the lens barrel, the reflecting face faces the top of the lens barrel, the top mirror is installed at the top of the lens barrel, the reflecting face faces the primary mirror, and a light-passing aperture is formed between the top mirror and an opening in the top of the lens barrel; starlight firstly irradiates on the spherical toroidal mirror or the paraboloid toroidal mirror and is reflected to the area of the edge of the top reflecting mirror to form an annular light spot, and then the annular light spot is reflected to the edge of the bottom reflecting mirror to form an annular light spot; the purpose of the concentric ring projection is to change the reflection angle of the return light beam between the top reflector and the bottom reflector, and the small angle can increase the return times of the light beam, thereby facilitating the support of a higher telescopic multiple. The concentric ring bulges can also solve the problem of residual spherical aberration; the method is widely applied to astronomical observation.

The embodiment of the utility model provides a device for generating multiple parallel collimated light beams and an optical measurement system, and relates to the technical field of optics. The device for generating the multiple parallel collimated light beams comprises a light source, a coupling mirror group, an optical fiber, a collimating mirror group and a hole diaphragm, and the coupling mirror group is used for coupling light beams emitted by the light source to obtain coupled light beams; the fiber is used for transmitting coupled beams; the collimating lens group is arranged at the emergent end of the optical fiber; a plurality of small holes are formed in the hole diaphragm sheet; and the aperture diaphragm is arranged on an emergent light path of the collimating lens group and is used for emitting a plurality of parallel and collimated light beams. By arranging the coupling mirror group, fine shaping of the light beam can be realized to control the size and divergence angle of the light beam, so that the coupled light beam can be better matched with the optical fiber. And the aperture diaphragm is arranged on an emergent light path of the collimating lens group and is used for emitting a plurality of parallel and collimated light beams. A plurality of parallel and collimated light beams can be obtained by arranging a hole diaphragm on an emergent light path of the collimating lens group. The whole structure is simple.

The application relates to the technical field of optics, and discloses a camera optical lens, which is composed of a first lens with negative refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a diaphragm, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power and a seventh lens with positive refractive power; and the following relationships are met: -6.000 <= R7 / R8 <= -3.000; 0.050 <= d6 / TTL <= 0.100; 130.000 <= FOV / FNO <= 180.000. Through the configuration mode of the lenses, the camera optical lens with large aperture, wide angle and good optical performance is provided, the total optical length of the camera optical lens can be controlled, the lens focal length can be reasonably distributed, the deflection degree of light passing through the lens can be moderated, the astigmatism and distortion can be effectively corrected, the chromatic aberration can be corrected, the aberration can be reduced, and the imaging effect is improved.

The utility model discloses a full-automatic five-classification blood analyzer optical system which comprises a fixed seat fixedly connected with the upper side surface of a base, a flow chamber is arranged on the upper side surface of the fixed seat, an irradiation box body is arranged on one side of the flow chamber and fixedly connected with the base, and the irradiation box body is arranged on the other side of the flow chamber. And a front light assembly is arranged in the irradiation box body. According to the utility model, through the circular light barrier arranged in the center of the diaphragm I, direct laser light spots and small-angle scattered light signals can be shielded, the signal-to-noise ratio is improved, the sensitivity of a low-angle scattered light receiving assembly to left-right position deviation is reduced, the overall optical stability is improved, and the accuracy of a detection result is guaranteed.

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 embodiment of the invention relates to the technical field of optics, and particularly designs a Sammer lens and electronic equipment. The Sammer lens comprises at least four lens groups which are sequentially arranged from an object side to an image side along an optical axis, wherein each lens group comprises at least one lens with negative focal power and at least one lens with positive focal power. The side, facing the object side, of the diaphragm is provided with at least two lens sets, and the side, facing the image side, of the diaphragm is provided with at least two lens sets. The first lens group has negative focal power, and the diaphragm front lens group has positive focal power; all the lens groups behind the diaphragm have positive focal power. The ratio of the focal length of each lens group to the effective focal length of the system is reasonably limited, so that the aberration correction capability and the system stability can be considered on the whole, and the optical performance of high resolution, low distortion and good imaging consistency can still be obtained under the condition of a large image field.

The invention discloses a fixed-focus optical system, and relates to the technical field of optics, and the fixed-focus optical system comprises an image sensor, a lens group, a diaphragm, a beam splitter, a plane reflector, at least one curved reflector and a wafer which are sequentially arranged from an image plane to an object plane. The fixed-focus optical system further comprises a light source which is arranged corresponding to one side, facing the first reflector, of the beam splitter and is used for emitting illumination light. Wherein the image sensor, the lens group, the diaphragm, the beam splitter and the first reflector form a first optical axis, the beam splitter and the first optical axis are arranged at an included angle, the plane reflector and the first optical axis are arranged at an included angle, and the at least one curved reflector is arranged between the plane reflector and a wafer and used for reflecting illumination light passing through the plane reflector to the wafer. The coaxial hot spot phenomenon is effectively eliminated, and the compactness of the system and the image uniformity are improved.

The application provides a device for weakening stray light, and belongs to the technical field of optics. The device for weakening stray light comprises a lens barrel, a light elimination part, a lens and a sensor. The light elimination part is designed between the lens and the sensor, which can make up for the deficiency that the stray light between the inner wall of the lens and the sensor cannot be eliminated when the light elimination part is added in front of the lens and inside the lens. The light rays emitted from the lens to the part of the inner wall of the lens barrel between the two diaphragms are transmitted to the outside of the target surface of the sensor or are blocked by the light elimination part through the joint action of other diaphragms on the mounting part, which can effectively deal with the problem of stray light change caused by lens focusing change. No matter where the lens is located, the light elimination part can effectively weaken the stray light. The light elimination part is arranged between the lens and the sensor, which does not increase the length of the imaging system in the axial direction like adding a light elimination structure in front of the lens, and can make the system more compact.

Embodiments of the present application belong to the technical field of optics, and provide a lens, a projection apparatus, a vehicle lamp apparatus, and a vehicle. The lens comprises a lens group and a diaphragm. The lens group comprises at least five lenses arranged from an image side to an object side, at least five lenses in the lens group having focal power, and at least one lens in the lens group having negative focal power. The diaphragm comprises a first side and a second side that are disposed opposite one another in the direction from the image side to the object side, and at least one of the first side and the second side is provided with a lens. When the lens is provided on the first side, the lens located on the first side and closest to the diaphragm has negative focal power; and / or, when the lens is provided on the second side, the lens located on the second side and closest to the diaphragm has negative focal power. In this way, the lens can cooperate with a direct display chip such as a micro light-emitting diode display chip to form a small-sized projection apparatus, thereby reducing the size of the vehicle lamp apparatus.

The embodiment of the invention provides a lens, a projection device, a vehicle lamp device and a vehicle, and belongs to the technical field of optics. The lens comprises a lens group and a diaphragm. Wherein the lens group comprises at least five lenses arranged from the image side to the object side, the number of the lenses with focal power in the lens group is at least five, and the number of the lenses with negative focal power in the lens group is at least one. The diaphragm comprises a first side and a second side which are oppositely arranged in the direction from the image side to the object side, at least one of the first side and the second side is provided with a lens, and when the lens is arranged on the first side, the lens which is located on the first side and closest to the diaphragm has negative focal power. And / or when the second side is provided with the lens, the lens which is located on the second side and closest to the diaphragm has negative focal power. By means of the arrangement, the lens can be matched with direct display chips such as the micro light-emitting diode display chip to form a small-size projection device, and therefore the size of the vehicle lamp device can be reduced.

The invention belongs to the field of telescope optics, and particularly relates to a plastic aspheric telescope optical system. A plastic aspheric telescope optical system is sequentially provided with an objective lens first lens, an objective lens second lens, a focusing lens, a semi-pentaprism, a roof prism, a field diaphragm, an eyepiece aspheric lens, an eyepiece second lens and an eyepiece third lens which share the same optical axis from an object side to an image side. The invention has the following remarkable beneficial effects: (1) the lenses made of plastic aspheric surfaces are used, so that the peripheral resolution of the telescope can be smoothly reduced, the distortion is small, and the aberration is small under the condition that the lenses of the telescope are not increased; (2) the method is only suitable for one plastic aspheric lens, specific lens parameters are given, the lens is simple to manufacture and easy to realize, and the manufactured telescope has the characteristics of small size, convenience and portability; and (3) the cost of the telescope is lower than the manufacturing cost of the traditional telescope.

The invention relates to the field of optics, in particular to a large-field-angle 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 negative focal power and a sixth lens with positive focal power from the object plane side to the image plane side. A seventh lens; the large-field-angle projection lens satisfies the following conditional expressions: HFOV is greater than 75 degrees; f is more than 1mm and less than 2mm; wherein f is the field angle of the large-field-angle projection lens, and HFOV is the half field angle of the large-field-angle projection lens. Through the setting of the parameters and the structure, the large field angle of the projection lens is realized, the projection lens can conveniently project a larger image, and the application range of the large field angle projection lens is enlarged.

The utility model 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 optical axis direction, 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.