24 results about "Diaphragm (optics)" patented technology

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 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 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 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 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.

The invention discloses a front objective lens group adaptive to a hyperspectral camera and an imaging spectrometer, and belongs to the technical field of front imaging optics of precision optical equipment. A first thick meniscus negative lens (31), a second thick meniscus negative lens (32), a third thick meniscus negative lens (33), a positive focal power doublet lens (34), an aperture diaphragm, a negative focal power doublet lens (35), a positive focal power meniscus lens (36) and a positive focal power doublet lens (37) are sequentially arranged on the objective lens group along the light beam propagation direction, and all the parts are coaxially fixed in a lens barrel. Through the design of a multi-lens composite structure, the wide field of view coverage of + / -12 degrees is realized, the broadband aberration is comprehensively corrected, and the light transmittance reaches 96% or above; by adopting compact arrangement and a precise positioning structure, the optical filter is small in size, light in weight, excellent in stray light suppression effect and high in long-term working stability, effectively overcomes the defects in the prior art, and is suitable for various precise optical observation devices.

The present application relates to the field of optics, specifically to a zoom lens for unmanned aerial vehicle and unmanned aerial vehicle, the zoom lens for unmanned aerial vehicle is sequentially composed of a first fixed lens group with positive focal length, a first variable power lens group with negative focal length, a second fixed lens group with positive focal length, a diaphragm, a second variable power lens group with negative focal length, a third fixed lens group with positive focal length and a focusing lens group with negative focal length from the object plane side to the image plane side; the first variable power lens group, the second variable power lens group and the focusing lens group move along the direction of the main optical axis of the zoom lens for unmanned aerial vehicle; the zoom lens for unmanned aerial vehicle satisfies the following condition formula: TTL / ft<0.8; wherein, TTL is the total optical length of the zoom lens for unmanned aerial vehicle, and ft is the focal length of the zoom lens for unmanned aerial vehicle in a telephoto state. The zoom lens for unmanned aerial vehicle can be installed in a smaller unmanned aerial vehicle, and meanwhile, pictures at a relatively far position can be shot, so that the application range of the zoom lens for unmanned aerial vehicle is increased.

The utility model relates to the technical field of optics, in particular to a long-wave uncooled boiler temperature measuring lens, which comprises a first lens, a second lens, a secondary imaging lens, an aperture diaphragm and an uncooled detector. According to the boiler temperature measuring lens of the long-wave uncooled detector camera, the boiler temperature measuring lens is composed of the aperture diaphragm, the first lens, the second lens, the secondary imaging lens and the uncooled detector, the working wave band of the boiler temperature measuring lens is 8-12 micrometers, the focal length of the boiler temperature measuring lens is 5 mm, the aperture of the boiler temperature measuring lens is F1.5, the adaptive resolution of the boiler temperature measuring lens is 384 * 288, the pixel size of the boiler temperature measuring lens is 17 micrometers, the total length of an optical system is 150 mm, and the maximum aperture of the boiler temperature measuring lens is 27 mm. The lens has the advantages of being good in imaging quality, small in lens aperture, reasonable in tolerance, easy to install and adjust, easy to produce in mass, capable of meeting the imaging quality, long in length, small in aperture and large in view field, capable of improving the imaging quality, suitable for special application scenes, capable of optimizing optical performance and capable of improving the system integration degree, and the structural length meets the use requirement.

The invention belongs to the technical field of spectral imaging and polarization optics, provides a polarization chromatic aberration compensation method for polarization multiplexing type acousto-optic tuned filtering (AOTF) spectral imaging, and designs a polarization chromatic aberration compensation module comprising a liquid crystal polarization grating according to the polarization dependence characteristic of an acousto-optic tuned filtering device. And chromatic aberration compensation of polarization multiplexing acousto-optic tuning is realized by matching the period of the liquid crystal polarization grating. Non-biased incident light enters an acousto-optic tuned filter through a front light path to generate two beams of polarization-state orthogonal narrow-band diffraction light, and the two beams of polarization-state orthogonal narrow-band diffraction light are collimated by a rear light path and screened by a shielding diaphragm, and then enter a liquid crystal polarization compensation module consisting of a liquid crystal wave plate and a liquid crystal polarization grating to be corrected; and finally, the image is focused to the detector through the imaging module to realize combined imaging. The method does not need mechanical movement or electric control adjustment, the structure is light and thin, and integration is easy.

Method for replicating the illumination and imaging properties of an optical production system when illuminating and imaging an object (5), wherein the replicating is carried out using an optical measuring system of a metrology system (2), - where the optical measuring system -- a lighting optic (9) for illuminating the object (5) --- with a pupillary diaphragm (10) of the illumination optics (9) in the area of ​​an illumination pupil in a pupillary plane (11) and -- has an imaging optic (20) for imaging the object (5) onto an image plane (29), - wherein the object (5) can be moved perpendicular to an object plane (4) by the following steps: - Providing at least one pupil diaphragm (10) for specifying several measurement illumination settings generated by moving the pupil diaphragm (10) in the pupil plane (11), - Taking aerial survey photos I measin the image plane (29) for different displacement positions of the object (5) perpendicular to the object plane (4) at the different measurement illumination settings, wherein the different measurement illumination settings are specified by displacement of the pupil aperture (10), - Reconstructing a complex mask transfer function M from the recorded aerial measurement images I meas , - Determining a 3D aerial image I sim of the optical production system as a result of the simulation process from the reconstructed mask transfer function M and a given illumination setting σ target of the optical production system - the reconstruction takes into account that the progressions of the aperture edges (39) of the at least one pupil aperture (10) that effectively determine the respective measurement illumination setting change depending on the displacement position of the pupil aperture (10) beyond a mere displacement of the aperture edge (39).