735 results about "Ccd detector" patented technology

Novel nanowell microarrays are disclosed in optical contact with polymer waveguides wherein evanescent field associated with lightwaves propagated in the waveguide excite target substances in the nanowells either by a common waveguide or by individual waveguides. Fluid samples are conveyed to the nanowells by means of microfluidics. The presence of the target substances in fluid samples is detected by sensing fluorescent radiation generated by fluorescent tag bound to the target substances. The fluorescent tags generate fluorescent radiation as a result of their excitation by the evanescent field. One or more PMT detectors or a CCD detector are located at the side of the waveguide opposite to the nanowells. Fluorescent radiation is detected due to its coupling with the waveguide or its emission through the waveguide.

The illumination profile of a radiation beam is initially measured using a CCD detector. A reference mirror is then placed in the focal plane of the high aperture lens and the reflected radiation measured. By comparing the illumination profile and the detected radiation it is possible to determine the transmission losses for S and P polarisation which can then be used in scatterometry modeling.

The invention discloses a data processing and transmitting system of high-speed multichannel CCD (charge-coupled device), which comprises a CCD analog front end, a data processing unit, a high-speed serial transmission unit and a high-speed image data collection system which are sequentially connected. The CCD analog front end is used for converting an analog signal output by a CCD detector and subjected to sampling and pulse control into n channels of digital image data via n A/D (analog/digital) converters, transmitting the digital image data to the data processing unit, and acquiring data of each channel at the same time. The data processing unit is used for transmitting single-channel high-speed data streams, a data transmitter clock and a horizontal synchronizing signal acquired from integration of the digital image data to the high-speed serial transmission unit. The high-speed serial transmission unit is used for converting single-channel high-speed data streams via LVDS (low-voltage differential signaling) serial chips into high-speed LVDS data streams for transmitting. The high-speed image data collection system is used for collecting the high-speed serial LVDS data streams and realizing real-time storing and displaying of the image data.

The invention relates to a device and a method for measuring lens focal length as well as a method for evaluating optical quality, wherein the device for measuring the lens focal length is composed of a plane mirror, a lens to be measured, a point light source, a vertical incision, a one-dimensional precise flat movable guide rail, a laser distance measuring instrument, a CCD detector and a display, and the method for measuring the lens focal length is as follows: (1) adjusting the autocollimation of the point light source and the lens to be measured; (2) adjusting the plane mirror to make the transflective convergent beam enter the CCD detector; (3) measuring the focal depth of the lens to be measured; (4) measuring the distance L from the point light source to the geometric main plane of the lens to be measured; (5) calculating the focal length f = L + d of the lens to be measured, and the d is the distance between the geometric main plane of the lens and the optical main plane. The optical processing quality of the lens to be measured is qualitatively evaluated through the observation of shape of the far-field focal spot. The device and the method are applied to the measurement and evaluation of the small-bore short-focus and large-bore long-focus lens, and have the advantages of the intuitionism, the high measuring precision and the simple mechanism.

The invention discloses a method and a device for measuring surface topographies of mirror and mirror-like objects. Phase measurement deflectometry is adopted to measure mirror and mirror-like surface shapes, a combination between a liquid crystal display and a planar mirror serves as a calibration plate, the liquid crystal display is fixed and can not move, the planar mirror moves freely for four times, an image reflected by the planar mirror is photographed by a CCD detector, linear solution and beam method adjustment are then used for completing calibration on inner parameters of the camera, global pose estimation is used for completing calibration on the relative relation between the liquid crystal display and the camera, and finally, a three-dimensional topography of a to-be-detected mirror surface is calculated and obtained through a gradient integral of the phase measurement deflectometry. According to the device and the method of the invention, defects that the calibration plate is needed and a precise positioning control point is attached to the planer mirror during the calibration process in the traditional method are overcome, the measurement cost is low, and he measurement speed is quick; and constraint conditions such as rotation matrix orthogonality during a perspective imaging process and a fourier transform method are introduced for corresponding point matching, and influences by high noise and multiframe processing on three-dimensional topography recovery can be overcome.

The digital profile grinder consists of system unit and auxiliary unit station. The system unit is one completely closed structure with machine body, multifunctional workbench, grinding frame, slide seat, CCD detector, and electric distributor. The auxiliary unit station has dust collector, cooler, and air balancing and braking controlling station. The present invention has image distinguishing technology adopted, and has integrated on-line machine tool detection, on-line compensation, on-line grinding wheel trimming and opened multi-axial digital control. It has at most eight shafts controlled, including seven servo rotary motor shafts and one linear servo motor shaft, and has at most six linked shafts, with the controlled shafts being in different combination. The present invention is suitable for machining various complicated parts.

The present invention comprises a tool for and a method of inspecting a mask used in photolithography to determine errors in phase, amplitude, and pattern edges. An embodiment of the tool comprises a laser source, a polarizing beam splitter, a first shutter, a mask, a second shutter, a quarter wave retarder, a single-mode optical fiber, and a CCD detector array. An embodiment of the method comprises four independent measurements of light intensity, comprising: a pattern of a mask, a diffraction pattern of a reference pinhole, an interference pattern of the mask and the reference pinhole, and an interference pattern of the mask and the reference pinhole with a known phase difference. Calculations are performed to determine phase and amplitude information as a function of location on the mask. The phase and amplitude information is then compared with a design layout of the mask to determine pattern edge information and identify possible defects in the mask.

The invention discloses a high-temperature synchrotron radiation in-situ research device. The high-temperature fused salt synchrotron radiation in-situ research device comprises a fused salt test tube, a vacuum furnace, a heating device, a first ionization chamber, a second ionization chamber or a charge coupled device (CCD) detector and an external fluorescence detector, wherein a cavity is formed in the vacuum furnace; an incident window, a transmission window and a fluorescence window are arranged on the furnace wall of the vacuum furnace; the incident window and the transmission window are arranged coaxially and collinearly; the axial line of the fluorescence window is vertical to that of the incident window and/or the transmission window; the heating device is arranged in the cavity of the vacuum furnace and is used for heating the fused salt test tube arranged in the heating device; an incident hole, a transmission hole and a fluorescence hole corresponding to the incident window, the transmission window and the fluorescence window respectively are formed on the heating device; the first ionization chamber corresponding to the incident window is arranged outside the vacuum furnace; the second ionization chamber or the CCD detector corresponding to the transmission window is arranged outside the vacuum furnace; and the external fluorescence detector corresponding to the fluorescence window is arranged outside the vacuum furnace.

The invention belongs to the technical field of optical microscopic imaging and optical precision measurement and relates to a super-resolution differential con-focal microscope with both macro field coverage observation and micro field coverage observation. The invention mainly comprises a laser (1), a beam expander (2), a spectroscope (4), a polarization spectroscope (5), a range extension tracking and measuring system (6), a measuring objective lens (7), two optical collectors (16) and (19), pinholes (17) and (20), detectors (18) and (21), an LED light emitting diode (12) which is arranged in a direction opposite to the reflection direction of the spectroscope and a CCD detector (11) which is arranged in a direction opposite to the reflection direction of a spectroscope (9). The LED light emitting diode and the CCD detector are used for realizing macro-field coverage observation of a con-focal microscope through imaging the surface type of the detected samples, and the axial resolution power of the con-focal microscope can be raised through deploying the optical path of the differential con-focal microscope.

The invention relates to a free space laser communication system based on the orbital angular momentum of light beams, which belongs to the technical field of optical applications. The free space laser communication system consists of an optical fiber closely arranged laser, four convex lenses, two polarizers, a space optical modulator, a pinhole diaphragm, a beam expansion system, a composite binary amplitude grating and a CCD detector. The free space laser communication system takes the optical fiber closely arranged laser with gate control as a light source, designs a phase diffraction grating loaded onto the space optical modulator according to the distribution of the light beams emergent from the optical fiber closely arranged laser, and leads all the light beams to respectively havedifferent diffraction orders and be positioned on a central shaft of the system, thereby constructing a central diffraction light beam carrying gate information of the optical fiber closely arranged laser. When the system works, the gate control is carried out on the optical fiber closely arranged laser according to data to be transmitted for realizing the modulation loading of the data to be transmitted; and the light beams carrying data information utilize the composite binary amplitude grating to detect the orbital angular momentum state of the light beams at the receiving end of the system after transmitting for a certain distance in free space, thereby completing the demodulation of the data transmitted by the communication system.

The invention is a surface plasma syntonizing and surface enhanced Raman spectrum measure apparatus. Its main structure consists of laser source 21, angular instrument of initiate angle and polarize status adjustable together with polarize fins forms the light source system; sample table consists of edge glass of semi-circular or right angle or hemisphere and a basal chip with SERS activity. SERS signal detecting system made up of spectrograph and CCD detector. SPR signal detector is installed on one side of the edge glass while the light source system on the other side. The invention is adopted with the SPR detecting method of variable angle internal reflection, initiating the sample in the elapse field to obtain the SERS spectrum, and synchronizingly obtaining the SPR spectrum and the further enhanced SERS spectrum under syntonizing enhancing angle. Higher detecting sensitivity and s/n ratio can be obtained when measuring the SERS signal under dim background.

The invention relates to an online detection and control method of the periphery of a filtering rod and a device. The device is characterized by mainly comprising a parallel light source (1), a linear array CCD (Charge Coupled Device) detector (2), a scanning motor (3), a signal processing module (4) and an executing mechanism (6), wherein the parallel light source (1) and the linear array CCD detector (2) are respectively positioned at the two opposite sides of the filtering rod; the scanning motor (3) drives the parallel light sources (1) and the linear array CCD detector (2) to rotate around the filtering rod; the signal input end of the signal processing module (4) is connected with the signal output end of the linear array CCD detector (2); and the signal output end of the signal processing module (4) is connected with the control end of the parallel light source (1), the control signal input end of a motor driver of the scanning motor and the signal input end of the executing mechanism (6) simultaneously. The invention has the advantages that the accuracy is high (the size of the received image element is 10mum), no influence is caused by various interference factors such asvibration, noise, temperature, dust and barometric fluctuation and the like on a site, and the detection result is accurate, stable and reliable.

The invention discloses a tobacco leaf grading method based on a hyperspectral image and a deep learning algorithm. The tobacco leaf grading method comprises steps of 1, obtaining hyperspectral image data of a tobacco leaf sample to be measured, 2, performing high level characteristic extraction on the image data to perform dimension reduction, and 3, performing classification on obtained image information and spectral information. A hardware platform of a hyperspectral imaging system comprises a light source, a light splitting module, an area array CCD detector and a computer provided with an image collection card; spectral information can be obtained while the imaging system is utilized to perform image information collection, separate collection is not needed and collection time is shortened; in the step 2, a convolutional neural network is utilized to perform pre-processing and then a deep belief network is utilized to perform characteristic extraction; in the step 3, a Sofmax layer is added on the top layer and obtained characteristics are inputted into a softmax regression classifier to realize classification. The tobacco leaf grading method based on the hyperspectral image and deep learning can maximally achieve lossless grading, accurately divides a tobacco leaf grade, and ensures benefits of a purchasing party.

The invention discloses a multiaxis differential spectrum absorbing method and device for vertically distribution detection of atmospheric components. Wherein, a plurality of telescopes are arranged to observe the space from the ground in different angles of pitch, so as to detect and collect sun lights scattered by the atmosphere; the surfaces of the telescopes' lens cones are blackened to reduce stray light, the scattered sun light is converged at the ends of optic fibers after passing the lens and light filters in the telescopes; the optic fibers at the tail ends of the telescopes are combined and guide the scattered sun lights into the incident slit of an imaging spectrometer, which first disperses the scattered sun lights, and then concentrate them on a photosensitive surface of a face array imaging CCD detector; the spectral signals go through data analysis and treatment after A/D conversion and inputting into a computer. The invention is applicable for chemical research of atmosphere, provides input data and model verification for chemical model of atmosphere; and is applicable for verifying the results of atmospheric components detected by a satellite.

The present invention provides a light field imaging-based chromatographic PIV measuring device and a method. The device includes a light source apparatus for generating double-pulse laser light and illuminating a three-dimensional flow field and an imaging apparatus for photographing the three-dimensional flow field; the light emitting end of the light source apparatus is provided with a lens group; the light source apparatus and the imaging apparatus are connected with a time sequence synchronous controller; the imaging apparatus is connected with a computer; the lens group is used for developing the double-pulse laser generated by the light source apparatus into a body light source of a certain thickness and a two-dimensional sheet light source of 1 mm and illuminating the flow field; and the image forming apparatus comprises a main lens, a CCD detector and a microlens array positioned between the main lens and the CCD detector. With the device and the method of the invention adopted, a weight matrix can be can quickly calculated, the calibration of the internal and external parameters of a light field camera is not required, and system error caused by multi-camera synchronous coupling can be reduced. The device is simple.

The invention relates to a high dynamic range laser far-field focal spot measurement device and method. The high dynamic range laser far-field focal spot measurement device comprises a laser beam shrinkage or expander system, an attenuation wedge plate, a spectroscope, a scientific grade CCD (Charge Coupled Device) detector, a micro lens array, a CCD detector and a control computer; the laser beam shrinkage or expander system, the attenuation wedge plate and the spectroscope are arranged on the same light path in turn; the light incident to the spectroscope is divided into the transmission light and the reflected light through the spectroscope; the scientific grade CCD detector is arranged on a light path of the reflected light after the reflected light passes through the spectroscope; the micro lens array and the CCD detector are arranged on a light path of the refracted light in turn after the refracted light passes through the spectroscope; the scientific grade CCD detector and the CCD detector are connected with the control computer. According to the high dynamic range laser far-field focal spot measurement device and method, the dynamic measurement on high dynamic range laser far-field focal spots can be achieved and the measurement accuracy can be well ensured.

The invention discloses an optical surface shape detection device and an optical surface shape detection method. The emitted light of a laser of the device is processed by a beam splitter and a collimation optical unit to generate illumination light; planes to be detected on a first clamping frame and a second clamping frame generate interference lights which return through a light path and then are collected to a CCD detector by the beam splitter through a convergence optical unit; a phase shifter is used for generating phase shift; and an angle measurement unit is used for measuring angle difference between the planes to be detected on the first and second clamping frames. The method comprises the following steps: putting the first and second planes to be detected on the second and first clamping frames respectively, and performing interferometry on the optical path difference between the first and second planes to be detected; rotating the first plane to be detected for a certain specific angle relative to the initial position and measuring the optical path difference between the first and second planes to be detected; rotating the first plane to be detected for 180 degrees, putting a third plane to be detected on the first clamping frame, and measuring the optical path difference between the first and third planes to be detected; and putting the second plane to be detected on the second clamping frame and measuring the optical path difference between the second and third planes to be detected.

An apparatus for use in examining an object, such as skin, mucosa and cervical tissues for detecting cancer and precancerous conditions therein. In one embodiment, the apparatus includes a gun-shaped housing having a handle portion and a barrel portion. The front end of the barrel portion is open, and a glass cover is mounted therein. LED's are disposed within the handle portion. A manually-operable switch for controlling actuation of the LED's is accessible on the handle portion. An optical fiber is used to transmit light from the LED's through a first polarizer in the barrel portion and then through the glass cover to illuminate a desired object. Reflected light from the object is passed through a second polarizer, which is adjustably mounted in the barrel portion and which is preferably oriented to pass depolarized light emitted from an illuminated object, and is then imaged by optics onto a CCD detector. The detector is coupled to a wireless transmitter that transmits the output from the detector to a remotely located wireless receiver.

The invention relates to a dammann grating-based femtosecond laser parallel micromachining device with a real-time monitoring function. The device is characterized in that femtosecond laser parallel micromachining is performed on the basis of the beam splitting characteristic of the dammann grating, thus greatly increasing the efficiency of femtosecond laser machining; and a CCD detector is utilized to observe and monitor the machining process in real time. The invention has good application prospect in the aspect of femtosecond laser parallel micromachining.

The invention provides a snapping type high-flux polarization imaging method and a polarization imager. The polarization imager comprises a front optical imaging system, a microlens array and an array type polarization imaging detector. The microlens array is arranged on the imaging face of the front optical imaging system. The array type polarization imaging detector is arranged on the focal plane of the front optical imaging system. The array type polarization imaging detector is composed of a CCD detector array and a linear polarizing film array in a coupled mode. Each linear polarizing film corresponds to a CCD detector pixel. Light emitted or reflected by a target in different directions passes through the front optical imaging system and is imaged on a certain microlens. The received light in the different directions of the target is distributed to the pixels of the array type polarization imaging detector through the microlenses so that sub images can be formed and finally an image, at each polarizing angle, of the target is obtained. The polarization imager has the advantages that the images at the multiple polarizing angles of the target can be obtained through exposure conducted at a time and can be used for monitoring and tracking the rapidly-changing or moving target.

A liquid crystal-based light-intensity adaptive control system used in a free space laser communication system is provided, which comprises a signal emission unit (1) and a signal reception unit (2). The signal emission unit (1) consists of a laser (3) and an emitting optical system (4). The signal reception unit (2) consists of a beam condenser (5), a beam splitter (6), a liquid crystal-based adjustable beam attenuator (7), a receiving optical system (11), a CCD detector (12), and a receiving optical system (13), a photoelectric detector (14) and an adaptive controller (15), which are optically connected with the beam splitter (6) to apply electrical signals onto the liquid crystal-based adjustable beam attenuator. The invention utilizes the liquid crystal-based adjustable beam attenuator to attenuate the laser light intensity without using moving components; changes the voltage signal required for the liquid crystal-based adjustable beam attenuator based on the self-adaptive algorithm to change the transmittance thereof, thereby realizing the self-adaptive control of incident beacon lights; and ensures the laser energy received by the CCD detector stable within a dynamic range of 20dB.

This invention belongs to photoelectricity measuring technique field and relates to a self-collimation intervention measuring system which comprises 1 Number one light source, 2 diaphragm, 3 Number one beam splitter, 4 Second beam splitter, 5 Third beam splitter, 6 object lens group, 7 reflectoscope, 8 CCD detector, 9 Second light source, 10 self-collimation grating, 11 aiming grating, 12 CCD detector. The invention provides a new method for measuring the three-dimensional deformation of an object based on the principle of self-collimation intervention and solves the problem that background technique can't measure the three-dimensional deformation of an object. There are two main light paths in the self-collimation intervention system of this invention and one is self-collimation light path which can measure the two-dimensional deformation of an object and the other is grating invention light path which can measure one-dimensional deformation of a object. And the accuracy of the deformation measured is improved with the increase of the grating frequency by the use of grating invention.

The present invention relates to a product detection device. The product detection device comprises a worktable, a total assembly rack, a detection platform, a CCD detector and a laser detector which are arranged on the total assembly rack and are located above the testing platform, a probe detector arranged on the total assembly rack, and a control device; the detection platform includes a bearing surface for bearing products to be detected; the bearing surface is provided with a plurality of positioning columns which vertically protrude upwards along a Z-axis direction and a fixing air cylinder which is separated from the positioning columns; the bearing surface is also provided with a plurality of upright columns which vertically protrude upwards along the Z-axis direction; the top surfaces of the upright columns are provided with oblique light reflecting mirror surfaces, included angles formed between a horizontal plane and the oblique light reflecting mirror surfaces being acute angles; the total assembly rack drives the probe detector to a position located above the detection platform; and the control device is used for starting and controlling the laser detector, the a probe detector and the CCD detector. The product detection device has the advantages of high detection efficiency and high precision.