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12 results about "Optical flat" patented technology
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An optical flat is an optical-grade piece of glass lapped and polished to be extremely flat on one or both sides, usually within a few tens of nanometres (billionths of a meter). They are used with a monochromatic light to determine the flatness (surface accuracy) of other surfaces, whether optical, metallic, ceramic, or otherwise, by interference. When an optical flat is placed on another surface and illuminated, the light waves reflect off both the bottom surface of the flat and the surface it is resting on. This causes a phenomenon similar to thin-film interference. The reflected waves interfere, creating a pattern of interference fringes visible as light and dark bands. The spacing between the fringes is smaller where the gap is changing more rapidly, indicating a departure from flatness in one of the two surfaces. This is comparable to the contour lines one would find on a map. A flat surface is indicated by a pattern of straight, parallel fringes with equal spacing, while other patterns indicate uneven surfaces. Two adjacent fringes indicate a difference in elevation of one-half wavelength of the light used, so by counting the fringes, differences in elevation of the surface can be measured to better than one micrometre.
Optical plate controller and reader
PendingUS20260138136A1Laboratory glasswaresColor/spectral properties measurementsOptical flatTesting Methods
Owner:QUIVER HOLDINGS INC
Spectrometer performance calibration device for frequency domain OCT systems
The application discloses a kind of spectrometer performance calibration devices for frequency domain OCT system, include: two groups of calibration light path components, light source drive board and fiber coupler;Two groups of calibration light path components are connected to fiber coupler;Fiber coupler is connected to light source drive board;Calibration light path component includes: six-dimensional adjustment frame, installation lens barrel, corner cube, optical flat, two-dimensional adjustment frame, collimating lens and collimating adjustment frame;Corner cube is installed to installation lens barrel;Installation lens barrel is connected to six-dimensional adjustment frame;Optical flat is installed to two-dimensional adjustment frame;Collimating lens is installed to collimating adjustment frame;Collimating adjustment frame is equipped with fiber connection part;Two-dimensional adjustment frame is between installation lens barrel and collimating adjustment frame.This application's spectrometer performance calibration device for frequency domain OCT system, simple structure can obtain signal-to-noise ratio with depth variation curve and other performance indicators, judge spectrometer assembly and debugging result, improve instrument consistency.
Owner:ZD MEDICAL (HANGZHOU) CO LTD
An equal-path adjustment and detection system and method for a non-polarizing beam splitter prism
The present application relates to a kind of equal optical path adjustment and detection system and method for unpolarized light splitting prism, equal optical path adjustment and detection system includes adjusting mechanism, fixed base, wide spectrum light source, first wedge optical flat, second wedge optical flat, first confocal distance measuring module, second confocal distance measuring module and interference detection component;The plane of first wedge optical flat is towards the first exit surface of first half prism;The plane of second wedge optical flat is towards the exit surface of second half prism;The measuring end of first confocal distance measuring module is towards the inclined plane of first wedge optical flat;The measuring end of second confocal distance measuring module is towards the inclined plane of second wedge optical flat.The present application establishes external optical reference surface by two pieces of wedge optical flat, independently measures air gap of wedge optical flat and corresponding half prism by combining first confocal distance measuring module and second confocal distance measuring module respectively, makes air optical path difference zero, eliminates group velocity dispersion mismatch.
Owner:CENT CHINA OPTOELECTRONICS TECH RES INST (CHINA STATE SHIPBUILDING CORP 717TH RES INST) +1
A method of measuring an ultra-large radius of curvature
The application discloses a method for measuring super-large curvature radius, and relates to the field of optical measurement, which comprises the following steps: placing two autocollimators in parallel on one side of an optical element to be measured, calibrating the parallel state by using optical flat crystals; then placing the autocollimators near the curved surface to be measured, synchronously adjusting the pitch angle and position to make the light spots on the same CCD axis; calculating the centroid offset of the reflected light spots, and reducing the noise influence by combining with a denoising algorithm; finally, calculating the curvature radius according to the distance between the two autocollimators and the centroid offset distance of the light spots; the method is compatible with concave-convex mirror measurement, does not need to replace equipment or adjust the optical path, has a simple optical path structure, and the algorithm is easy to realize; the method does not depend on a high-precision optical platform, can be applied in an optical workshop, compared with the traditional autocollimation method, does not need a large-stroke displacement table, and can realize the measurement of the super-large curvature radius only by fine adjustment, so that the operation is simplified, the repeatability is good, and the precision is high.
Owner:NATIONAL INSTITUTE OF METROLOGY CHINA +1
Optically based flat-panel cone-beam ct imaging assembly precision alignment apparatus and method
The application discloses a kind of based on optical flat panel cone beam CT imaging component precision installation and method, including horizontal plate, the upper and lower ends of the inside of the horizontal plate are fixedly installed with mark card plate, the right end of the inside of the horizontal plate is fixedly installed with fixed plate, the upper and lower ends of the inside of the fixed plate are fixedly installed with driving rod, the inside of the driving rod is fixedly installed with light projector, the left end of the fixed plate is fixedly installed with detection plate, the upper and lower ends of the inside of the detection plate are fixedly installed with electric capacity device.One kind of based on optical flat panel cone beam CT imaging component precision installation and method, by being fixedly installed in the inside of fixed plate before installation and adjustment with light projector, then again fixedly installing detection plate in the inside of horizontal plate, finally cooperate with the light of light projector and judge whether it can be from one end of detection plate to the other end, to judge whether light projector is located on the center line of horizontal plate, to reach the effect of convenient adjustment level.
Owner:SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
Micro-displacement device for detecting limit state of glass curtain wall anomaly detector
The utility model relates to a kind of for detecting glass curtain wall abnormal motion instrument limit state's micro-motion device, belongs to abnormal motion instrument limit state detection equipment technical field, including optical flat, the optical flat is equipped with three-axis micro-motion stage, the side of three-axis micro-motion stage is equipped with fixed platform, the fixed platform and three-axis micro-motion stage between be equipped with with fixed platform fixed magnetic induction sensor fixed block, the upper end of the magnetic induction sensor fixed block is equipped with sensor fixed groove, the fixed platform and three-axis micro-motion stage between be equipped with with three-axis micro-motion stage fixed magnetic induction receiver fixed block, the upper end of the magnetic induction receiver fixed block is equipped with receiver fixed groove.Simulate the small displacement that glass curtain wall can occur, and observe whether the abnormal motion instrument of measured can accurately capture and measure these changes, to verify its performance limit, realize the calibration and test of glass curtain wall abnormal motion instrument, to accurately calibrate or detect the limit working condition and measurement accuracy of the instrument in different directions.
Owner:ZHEJIANG XINGHONG CONSTR ENG TESTING CO LTD
A Large-Size Wafer Surface Topography Interferometric Measurement System and Method Based on Partitioned Exposure
This application relates to the technical field of measurement devices, and in particular to a large-size wafer surface topography interferometric measurement system and method based on partitioned exposure. The system includes a laser collimated light source system, a two-dimensional motion platform, a beam splitter assembly, an interferometric detection assembly, an imaging acquisition assembly, and a data processing unit. A collimated laser beam is incident perpendicularly, generating equal-thickness interference fringes through a wedge-shaped air film between the lower surface of the optical flat and the wafer under test. The two-dimensional motion platform drives the light source to move according to a partitioned array, achieving partitioned exposure acquisition. The beam splitter refracts the reflected interference beam to the lateral imaging assembly for image acquisition. The data processing unit calibrates, corrects, and fuses the partitioned images to reconstruct the full-field three-dimensional topography. This application significantly simplifies the system structure and reduces costs, achieving high-precision full-field measurement of large-size wafers while effectively suppressing the interference of motion errors on measurement accuracy and significantly improving detection efficiency.
Owner:HUAQIAO UNIVERSITY
An electromagnetic flatband for fano resonance detection and having significant robustness
PendingCN122109942AElectrical measurement instrument detailsElectrical testingElectromagnetic couplingFlat band
The application discloses an electromagnetic flat band for Fano resonance detection and with significant robustness, a plurality of first patterns and a plurality of second patterns are plated on the surface of an electrolyte substrate, and all the first patterns and all the second patterns are periodically arranged on the electrolyte substrate, the first pattern is a vertical pattern formed by rotating the second pattern by 90 DEG, and the material of the first pattern and the second pattern is metal. The electrolyte substrate is used as a support substrate, two groups of mutually perpendicular metal structures are prepared on the electrolyte substrate, a specific electromagnetic coupling effect is formed through the orthogonal arrangement of the metal structures, and then an optical flat band is stably generated. Different from the design of the existing single metal mode or non-orthogonal metal structure, the application can strictly control the vertical arrangement angle, size parameter and distribution density of the two groups of metal, so that the synergistic coupling effect is generated between the metal structures, the controllable generation of the optical flat band is realized, and the spectral characteristics of the flat band can be stably maintained.
Owner:HONG KONG UNIV OF SCI & TECH (GUANGZHOU)
A slewing bearing test platform
This invention relates to a slewing bearing testing platform. An optical flat base houses a speed regulator, a geared motor, and a faulty slewing bearing. One end of the faulty slewing bearing is connected to an overturning force load drive device, and the other end is connected to the geared motor via a transmission device. The geared motor is connected to the speed regulator, which controls the rotational speed of the faulty slewing bearing. The overturning force load drive device includes a retractable iron plate and an adjustable stainless steel weight at one end of the iron plate. The magnitude of the overturning force applied to the faulty slewing bearing is adjusted by retracting the iron plate and adding or removing the stainless steel weight. By adjusting the rotational speed and overturning force of the faulty slewing bearing, vibration signal data can be collected. This invention achieves different operating conditions by changing the operating speed and load of the testing platform, facilitating the collection of vibration signal data. It can improve production efficiency, reduce maintenance costs, and avoid safety hazards.
Owner:SHIPBUILDING TECHNOLOGY RESEARCH INSITITUTE (NO 11 INSTITUTE OF CSSC)
Endoscope imaging device
The utility model relates to an endoscope image measuring device, including optical flat, acquisition module, camera lens module, target module and light source module, the acquisition module includes the base of optical flat, the camera base that is equipped with along transverse and longitudinal displacement is established in the top of base, install CCD camera on the camera base, the camera lens module includes the camera lens centering seat that is horizontally established in the top of camera base and can along vertical direction lift, install the replaceable lens seat on the camera lens centering seat, the target module includes movable target slot, the target that is horizontally installed in the top of camera lens centering seat is equipped with on the target slot, the light source module includes setting in the top of target slot and can lift light source, the utility model discloses reasonable structure design, effectively guaranteeing the alignment of CCD camera, camera and target center when testing, can more efficient, high accuracy and high consistency to electronic endoscope camera lens carry out test.
Owner:RISING ELECTRO OPTICS LTD
Large size optical flat uniform polishing process and apparatus
The application discloses a large-size optical flat uniform polishing process and equipment, and the large-size optical flat uniform polishing process comprises the following steps: pre-modifying a polishing pad; dividing an optical flat surface into a center area and an edge area, and performing zoned pressure control on the center area and the edge area; supplying polishing liquid to the optical flat surface in a multi-point uniform spraying mode; moving the polishing disc in a compound motion track to polish the optical flat; acquiring real-time surface shape errors of the optical flat, and dynamically adjusting polishing pressure, polishing disc rotating speed and spraying flow according to the real-time surface shape errors. The surface shape precision of the large-size optical flat processed by the method can be stably controlled within λ / 10, the surface uniformity deviation is less than or equal to λ / 20, the edge collapse depth is less than or equal to 0.002 mm, the batch production surface shape consistency is improved by more than 50%, the good product rate is improved from 75% of the traditional process to more than 95%, and the batch application demand of high-precision optical flats for large-aperture industrial, military and scientific research equipment is met.
Owner:ZHONGSHAN GUANGDA OPTICAL INSTR CO LTD