11 results about "Dispersive prism" patented technology

The invention belongs to the field of astronomical telescopes, and particularly relates to a large-aperture spliced telescope adjusting device and method, and the method comprises the steps: starting a light source module, providing a far-field illumination light beam for a spliced primary mirror, and carrying out the confocal adjustment of each sub-mirror through an adjusting mechanism according to the far-field illumination light beam; the light source switching module is used for providing a near-field illumination light beam for the spliced primary mirror, and the near-field illumination light beam is split into two separated sub light beams by the pyramid mirror after penetrating through a splicing seam of the spliced primary mirror; performing dispersion on all the sub-beams through a dispersion prism, and converging the dispersed sub-beams through an achromatic lens to form dispersion stripes; the phase difference of the dispersion fringes is extracted through the camera, and co-phase adjustment is carried out on the sub-mirrors through the adjusting mechanism according to the phase difference of the dispersion fringes. According to the invention, high-precision and high-flux spectral response calibration and co-phase detection of the large-aperture spliced telescope can be realized, so that reliable technical support is provided for construction and operation of a next-generation giant astronomical telescope.

The invention provides a spliced detector flatness large-flux in-situ detection method which comprises the following steps: a light source emits a light beam which is compressed by a cylindrical lens, then is dispersed by a dispersion prism and respectively enters the edges of two adjacent detectors, and the two light beams are reflected by the surfaces of the detectors and then converge to generate dispersion stripes; a fixed difference calibration mode is adopted to calibrate stripe slope singularity caused by edge stripe variation in the dispersion stripe forming process; a band elimination filter is used for generating band elimination of a specific wave band in the dispersion fringes, and the channel spectrum is tested by analyzing the characteristics of the band elimination; the edge position of each detector is finely adjusted by using a dispersion prism, and the edge position of each detector is adjusted through deviation of a pupil position in combination with multi-point light emitted from one side of a wide-angle optical system by using an optical fiber interconnection system. According to the invention, the confocal and co-phase adjustment speed and precision of the spliced detector are greatly improved, and the regulation and control requirements of extremely high information flux and rapid convergence of a large-aperture system are met.

The application discloses a kind of multi-functional gas component concentration monitoring sensors in tunnel and use method, belong to road construction technical field.The application includes white laser emitter, 90° prism, beam splitter, dust cleaner, dispersion prism, 180° prism, dispersion light intensity detector, phase interference range finding device, data processing and sending device and guide rail.The application solves the problem that the function of the existing monitoring sensor in tunnel is single, and the cost is higher and the monitoring efficiency is lower by relying on multiple single-function sensors for monitoring;The application significantly improves the monitoring accuracy of the concentration of various gas components by full-spectrum coverage and double-data comparison to average, breaks through the limitations of traditional single-function sensors, without multiple sensor devices in parallel, significantly reduces the overall operating cost, improves monitoring efficiency.

This invention relates to a hyperspectral microscopic imaging system, comprising a front imaging module and a hyperspectral back imaging module; the front imaging module is used to collect sample light signals and image a front image beam; the hyperspectral back imaging module is used to disperse the front image beam along the dispersion direction to obtain a spatial spectral image; it includes: a magnifying lens group, a segmentation component, and a dispersive lens group; the front image beam is magnified into a magnified image in the dispersion direction by the magnifying lens group, and the segmentation component is disposed on the image plane of the magnified image; the segmentation component consists of multiple microlens groups arranged side by side along the dispersion direction covering the range of the magnified image; the dispersive lens group includes a collimating lens and a converging lens with the same focal length, the collimating lens and the converging lens forming a relay lens group, and a dispersive prism is disposed between them along the dispersion direction. The hyperspectral microscopic imaging system provided by this invention magnifies the multispectral superposition spatial image obtained by the front imaging module through a magnifying lens group, and then divides and converges it into discrete sub-images through a segmentation component, creating camera detection resources for recording spectral information. The dissociated spectral information is integrated into the spatial information and recorded by the camera to obtain a spatial-spectral image without superposition crosstalk. While achieving spatial-spectral separation, it reduces the distortion of spatial information.

The application discloses a kind of dispersion prism self-rotating direction's calibration method and device, the method includes: the dispersion prism, flat mirror and theodolite are placed according to measurement light path;Adjust the angle of theodolite, precision measuring mirror and flat mirror, make the self-rotating image reflected by flat mirror coincide with the cross wire in theodolite ocular, obtain initial angle;The geometry of the back surface, front surface and front end face of dispersion prism is fitted using multiple points, obtain first spherical surface, second spherical surface and first plane;Second plane where dispersion prism is located is fitted;Based on initial angle, adjust the angle of precision measuring mirror, theodolite and flat mirror, make the self-rotating image returned by flat mirror coincide with the cross wire of theodolite;Measure the target included angle of second plane and fourth plane, and take the target included angle as the final calibration value of the self-rotating direction of dispersion prism.The above-mentioned method introduces the reference of the self-rotating direction of dispersion prism to precision measuring mirror, and improves the calibration accuracy of the self-rotating direction and the assembling efficiency of dispersion prism.

Device (10) for detecting an object surface (16), comprising: a radiation generating device (17) with at least one radiation source (12), wherein the radiation generating device (17) is configured to emit first electromagnetic radiation with a first wavelength and second electromagnetic radiation with a second wavelength onto a linear measuring field on an object surface (16) with at least one measuring point (32) of the object surface (16) to be measured or an area of ​​the object surface (16) to be measured, which has at least one measuring point (32) to be measured, wherein the radiation generating device (17) is configured to emit no radiation or radiation used for surface detection onto the measuring point (32) to be measured or onto the area of ​​the object surface (16) in a wavelength range between the first wavelength and the second wavelength.such that the first and second wavelengths are different from each other; and a detection device (31) configured to detect at least one first measurement value and at least one second measurement value for each of the measurement points (32) to be measured, wherein the first measurement value is based on radiation with the first wavelength reflected from the object surface (16) and the second measurement value is based on radiation with the second wavelength reflected from the object surface (16), characterized in that the first and second measurement values ​​are each distance values ​​to the object surface (16) and are determined by triangulation, wherein the detection device (31) comprises an optical separating element (36) to divide the radiation reflected from the object surface (16) into a first and a second radiation component (40, 44), wherein the detection device (31) comprises a photosensitive unit (34),wherein the radiation components (40, 44) separated by means of the optical separating element (36) strike the photosensitive unit (34) at offset points of impact (42, 46), wherein the optical separating element (36) is a dispersion prism or an objective of the detection device (31) serves as the optical separating element (36).

The invention relates to the technical field of spliced telescopes, in particular to a spliced mirror surface correction method based on spectral dispersion fringes, which comprises the following steps of: filtering one or more specific wavebands of incident light through a band-stop filter, so that a known position spectral band gap appears on the spectrum of the incident light; incident light is utilized to irradiate splicing seams or splicing seam intersection points on the spliced mirror surface, and a dispersion prism is arranged on a reflected light path to perform dispersion on reflected light; interference is carried out on the dispersion light, interference fringes with different wavelengths are expanded in the direction perpendicular to dispersion, and two-dimensional interference fringes of a plurality of sub-mirrors are obtained; the spectral band gaps on the two-dimensional interference fringes of each sub-mirror are aligned by adjusting the poses of the plurality of sub-mirrors, so that the pose correction of the sub-mirror adjacent to the splicing seam or the splicing seam intersection point is completed; and each splicing seam or splicing seam intersection point on the spliced mirror surface is irradiated in sequence, so that the pose correction of all the sub-mirrors can be completed.

The invention relates to the technical field of optical imaging, and provides a snapshot type spectral imaging device and method, equipment, a storage medium and a product, and the snapshot type spectral imaging device comprises a detected object; the dispersion prism unit is used for generating spectral dispersion for a detected object to obtain first spectral information; the coding aperture unit is used for carrying out coding modulation on the first spectral information to obtain second spectral information; the dispersion projection unit is used for performing radiation projection on the second spectral information to obtain third spectral information; the dispersion projection unit and the dispersion prism unit are of a symmetrical structure to ensure that aberrations at two ends of the coding aperture unit are consistent; and the detector and the calculation unit are used for receiving the third spectral information and performing spectral recovery on the detection data based on spatial variation aberration overlap-add analysis to obtain a target spectral image. According to the invention, while the dispersion resolution and the measurement precision are ensured, the spatial resolution and the spectral accuracy of spectral imaging are improved.

A spectrally shearing optical relay system, said relay system being comprised of two halves disposed symmetrically about an aperture stop S, wherein each half comprises a plurality of rotationally symmetric optical elements forming an objective and a com-pound prism comprised of a plurality of dispersing prisms. The compound prisms are located between the objectives and the aperture stop. An imaging device with such an optical relay system is also proposed.

The application discloses a wavelength selective switch and belongs to the technical field of optical communication. In view of the problems of the prior art, such as the large space occupied by the switch lens, the large process development difficulty caused by the position and angle of the switch lens needing to be adjusted in combination with other optical elements, and the like, the application provides a wavelength selective switch, a second lens is connected to one side of a prism to form a self-focusing dispersion prism grating, the second lens is arranged in sequence along the incident direction of a polarized light beam, the diffraction grating is arranged on one side of the self-focusing lens to form a second lens, and the self-focusing lens and the diffraction grating are arranged in sequence along the incident direction of the polarized light beam. Thus, the self-focusing dispersion prism grating is used in the WSS optical system structure to separate the polarized light beam by wavelength, the switch lens is not needed, and the optical path adjustment in combination with other optical elements is not needed, so that the WSS optical system structure is simpler.

The invention belongs to the field of spectrum testing, and particularly relates to a channel spectrum testing system and method based on a point detector, and the method comprises the steps: S1, enabling a light source to emit composite light to a splicing primary mirror; s2, the compound light is reflected by each sub-mirror of the spliced primary mirror and then enters an interferometer for interference to form interference light; s3, interference light is subjected to dispersion of a dispersion prism and compression shaping of a cylindrical lens in sequence to form linear light spots, and the linear light spots are received by a point detector array; and S4, performing fitting and phase calculation on the dispersion interference fringes to realize confocal adjustment of the spliced primary mirror. The method does not need to calibrate dispersion interference fringes, greatly reduces the cost and complexity of the system, and improves the reliability of the system.