79 results about "Ccd detector" patented technology

The invention discloses a multi-optical fiber bundle imaging mode dimension space conversion plasma spectrum analysis system, which is characterized in that a two-dimensional optical fiber array comprising M * N optical fiber micropores is arranged on an optical fiber area array, a one-dimensional optical fiber array comprising M * N optical fiber micropores is arranged on an optical fiber linear array, and an optical fiber surface is connected by adopting M * N optical fibers according to a preset connection relation, the two-dimensional optical fiber array is converted into the one-dimensional optical fiber array, the optical grating disperses light transmitted by the optical fiber linear array, then the light is focused by the imaging lens and then is subjected to optical imaging by the CCD detector, and the spectral data conversion module converts a spectral image into a spectral data graph of each optical fiber channel. According to one-to-one correspondence of optical fibers in the two-dimensional optical fiber area array and the one-dimensional optical fiber linear array, the distribution state of elements in the plasma is reconstructed, and multi-optical-fiber sample element content detection is achieved.

The invention relates to a method for detecting a marine corrosion primary process, which comprises the following steps of: constructing three vacuum chambers and connecting the three vacuum chambers by using vacuum pipelines to form a detection system; ultrafast femtosecond laser with the repetition frequency being 1 kHz, the single pulse energy being 6 mJ, the pulse width being 35 fs and the central wavelength being 800 nm is generated through a pulse amplifier; one beam of 2mJ enters a vacuum chamber pipeline to be transmitted as a pulse light beam for detection in the original process of ocean corrosion, the other beam of 4mJ is transmitted outside the vacuum chamber to be used as a pump pulse light beam, and 400 nm pump pulse laser is generated through frequency doubling of a BBO crystal; the pump light beam and the detection light beam are incident on a sample of a sample mechanism in the third vacuum chamber, then the pump light beam is blocked, and only the detection light beam is incident on the sample; xUV light beams reflected from the sample are subjected to spectral dispersion and then enter a CCD detector, and the dynamic response of the sample after being excited by the pump light is monitored by measuring the transmissivity, reflectivity or absorption change of the surface of the sample.

The invention relates to an improved cage type light field imaging system and a debugging method, and belongs to the technical field of light field imaging, and the system comprises a main lens which is used for collecting light spots on an object surface, and enabling the light emitted by the light spots to be imaged on a micro lens; the micro lens is used for separating the light collected by the main lens into light beams in different directions and imaging the light beams on a virtual image plane; the relay lens is used for carrying out secondary imaging on the light beams in different directions to different pixels of a CCD detector of the camera; the relay lens comprises a first lens and a second lens, the focal lengths of the first lens and the second lens are positive, the focal length of the first lens is smaller than that of the second lens, and the magnification of the relay lens is larger than 1: 1. In the debugging process of the system, parallel light beams are arranged in front of the micro lens, and the position of the micro lens is determined in the mode that the parallel light beams vertically enter the micro lens. The system is not influenced by vignetting and distortion generated by the relay lens any more, and the debugging method improves the positioning precision of the micro lens.

The invention belongs to the technical field of fluorescence spectrum collection, and particularly relates to a quasi-three-dimensional fluorescence spectrum collection method and spectrograph based on a software phase locking technology, and the method comprises the following steps: respectively modulating coprime modulation frequencies of a plurality of laser light sources with different wavelengths, and synchronously exciting the laser light sources to the surface of a sample; a fluorescence signal generated on the surface of the sample is received and processed by a linear array CCD detector to obtain a multi-wavelength spectral signal simultaneously containing background light, scattered light and fluorescence components; inputting the multi-wavelength spectral signal into a software phase-locked amplification system, introducing a Costas ring to the software phase-locked amplification system for real-time tracking and correction, and generating a synchronous reference signal consistent with the laser modulation frequency; inputting the synchronous reference signal into a software lock-in amplifier, and extracting a plurality of pure fluorescence spectrum components excited by specific-frequency laser; and synthesizing the plurality of pure fluorescence spectrum components to finally form a quasi-three-dimensional fluorescence spectrum.

The invention discloses a spectral confocal efficient three-dimensional measurement device and method based on a spatial light modulator. The device comprises an illumination module and a detection module. The illumination module comprises a white light LED light source, a collimator, an LED condenser, a digital micromirror device DMD and a dispersion objective lens; the detection module comprises an imaging objective lens, a CCD detector and computer processing equipment. According to the invention, traditional point-by-point spectrum confocal measurement is expanded to area array type measurement, so that the measurement speed can be effectively improved; meanwhile, different from a scanning type or fixed pinhole type parallel measurement scheme, the invention uses a pinhole array with controllable diameter and spacing, thereby improving the flexibility and lateral resolution of measurement.

The invention provides a calibration method for a zero plane of an FLS mechanism in photoetching machine equipment and the photoetching equipment, and relates to the technical field of photoetching machines. The method comprises the following steps: determining light spot positions collected by a CCD detector when a workpiece table is at different moving heights, and constructing a relation model between the light spot positions and the height of a detected surface based on the moving heights and the light spot positions corresponding to the moving heights, substituting the position of a target light spot corresponding to the central position of the optical axis of the objective lens into the constructed relation model, calculating to obtain the optimal focal plane height, namely the zero plane of the FLS mechanism, calculating to obtain the adjustment height required by the FLS mechanism by using the initial height and the target height of the FLS mechanism, and controlling the FLS mechanism to move along the vertical direction based on the adjustment height, so as to obtain the target focal plane of the FLS mechanism. And zero plane calibration is completed.

The application relates to an improved cage type light field imaging system and a debugging method, and belongs to the technical field of light field imaging. The system comprises a main lens for collecting light spots on an object plane and imaging light emitted by the light spots onto a microlens; the microlens is used for separating the light collected by the main lens into light beams in different directions and imaging the light beams onto a virtual image plane; a relay lens is used for twice imaging the light beams in different directions onto different pixels of a CCD detector of a camera; the relay lens comprises a first lens and a second lens, the focal lengths of the first lens and the second lens are both positive, the focal length of the first lens is smaller than that of the second lens, and the magnification of the relay lens is greater than 1:1. During the debugging process of the system, parallel light beams are arranged in front of the microlens, and the parallel light beams are vertically injected into the microlens to determine the position of the microlens. The system is not affected by the vignetting and distortion generated by the relay lens, and the debugging method improves the positioning accuracy of the microlens.

The application provides a dual-wavelength coaxial aiming system capable of automatic collimation, which is used for attitude adjustment and target positioning aiming of a picosecond terminal optical path cone target of inertial confinement fusion (ICF). The system comprises automatic collimation optical paths and aiming optical paths of different working wavelengths; the automatic collimation optical paths comprise a light source, a light splitting prism, a secondary mirror, a reflecting mirror and a CCD detector; the aiming optical paths are composed of a primary mirror, a secondary mirror, a lens group, a light splitting prism and a CCD detector group, and each optical element is coaxial; the system multiplexes the secondary mirror, and realizes automatic collimation and positioning aiming through different wavelength transmission and reflection respectively; the system adopts combination of flint and crown glasses to correct chromatic aberration of different wavelengths; the image planes of the dual-wavelength optical paths are located at the same position; and the system adopts a coaxial two-mirror structure, and is compact in structure and small in size.

The utility model discloses a paper tube outer diameter testing device which comprises a base, a supporting frame is arranged on the base, supporting plates are symmetrically arranged on the left side and the right side of the top of the supporting frame, CCD detectors are arranged on the supporting plates, and a lifting displacement mechanism is arranged in the middle of the supporting frame. The lifting displacement mechanism comprises a lifting plate capable of moving up and down, a first driving motor and a supporting table are installed on the front side of the lifting plate, the supporting table is located above the first driving motor, a three-jaw chuck is arranged above the supporting table, the axis of the three-jaw chuck is perpendicular to the horizontal plane, and the axis of the three-jaw chuck is perpendicular to the horizontal plane. The first driving motor is connected with the three-jaw chuck through the transmission assembly and is used for driving the three-jaw chuck to rotate. According to the device, semi-automatic high-precision measurement of the outer diameter of the paper tube is achieved, the labor intensity of workers is reduced, stable and accurate clamping is conducted through the three-jaw chuck, and the accuracy of a measurement result is ensured through multi-point measurement.

The utility model discloses a wafer detection device which comprises a workbench, a fixing mechanism and a detection mechanism, and one side of the workbench is provided with a mounting rack. The fixing mechanism comprises a fixing disc and a plurality of fixing rings, the fixing disc is arranged on the surface of the workbench, a plurality of fixing grooves distributed in a concentric circle mode are formed in the surface of the fixing disc, a plurality of fixing holes are evenly formed in the edges of the fixing grooves, the diameters of the fixing rings correspond to the fixing grooves in a one-to-one mode, and fixing blocks corresponding to the fixing holes are arranged at the bottoms of the fixing rings. The fixing blocks can be inserted into the fixing holes; the detection mechanism comprises a laser generator, a CCD detector, a coaxial light generator and a controller, the laser generator, the CCD detector and the coaxial light generator are sequentially arranged on the mounting frame, the controller is arranged adjacent to the mounting frame, and the laser generator, the CCD detector and the coaxial light generator are all located above the fixing disc and electrically connected to the controller. According to the technical scheme of the utility model, wafers of different sizes can be replaced and detected rapidly and conveniently, time and labor are saved, and the working efficiency is improved.

The present invention discloses a spectrometer detection device, which includes a laser, a sample stage, a CCD detector and a cooling and drying device; a first optical lens assembly is provided between the laser and the sample stage; a second optical lens assembly is provided between the sample stage and the CCD detector; the surface of the sample stage is provided with a noble metal nano-coating; a concave mirror is provided on one side of the sample stage. When using this device, the laser of the laser passes through the first optical lens assembly and irradiates onto the sample stage, causing the sample to be measured on the sample stage to generate optical signals including scattered light. This optical signal is transmitted to the CCD detector through the second optical lens assembly to realize the component detection and analysis of the sample to be measured. Among them, the noble metal nano-coating and the concave mirror improve the light intensity of the scattered light transmitted to the second optical lens assembly, and the cooling and drying device improves the signal-to-noise ratio of the CCD detector, thereby improving the detection accuracy and sensitivity of this spectrometer detection device for the sample to be measured.

The present invention belongs to the technical field of refrigerated spectrometers, and relates to a compact non-vacuum thermoelectric refrigeration device for the CCD of a spectrometer, comprising: a window heat conduction cover, a window glass plate, a CCD pressing plate, a cavity housing, a heat insulation layer, a CCD detector, a TEC thermoelectric refrigeration chip, and an air-cooled fin seat, which are sequentially arranged along the spectral incident direction. The window glass plate is arranged inside the cylinder of the cavity housing, the window glass plate blocks the spectral incident channel, and the window glass plate seals and isolates the inner side of the cavity housing cylinder facing the rear cylinder opening into an independent sealed cavity. The refrigerating surface of the TEC thermoelectric refrigeration chip is attached to the CCD detector; by setting the sealed space where the CCD detector cavity is located to be relatively small, and using a small-size TEC thermoelectric refrigeration unit in the small space to cool the sealed space and conduct the heat to the external air-cooled fin seat, the present invention ensures a low-temperature environment in the sealed space, and therefore the present invention can improve the measurement accuracy of the refrigerated spectrometer.

The present invention relates to the field of radiation imaging technology, and discloses a fast radiation imaging system and method integrating optical imaging and coded aperture technology. The system includes a spectral imaging subsystem and a gamma-ray imaging subsystem. Among them, the spectral imaging subsystem and the gamma-ray imaging subsystem share a coded aperture plate. The gamma-ray imaging subsystem further includes a radiation detector, and the spectral imaging subsystem further includes a first lens, a second lens, a dispersion prism, a third lens and a CCD detector. In the direction from the object to be measured towards the radiation detector and the CCD detector, the arrangement order is successively the first lens, the coded aperture plate, the second lens, the dispersion prism and the third lens. The present invention can perform spectral imaging and radiation imaging simultaneously, reduce the system complexity and cost, and improve the working efficiency and safety.

An ultraviolet photographic device for investigation relates to the field of cameras and comprises a device body, a lens, a liquid crystal display screen, a data interface and a power interface which are mounted on the surface of the device body, an ultraviolet photographic objective lens mounted in the lens, an exposure lamp and a switch button which are both mounted on the upper surface of the device body, and a power module mounted in the device body, the power supply module is respectively connected with the CCD detector, the liquid crystal display screen, the exposure lamp, the switch button, the data interface and the power supply interface, the power supply module is externally connected with a power supply through the power supply interface, and the power supply module is connected with the power supply through the switch button to supply power to the CCD detector, the liquid crystal display screen, the exposure lamp and the data interface; the CCD detector is connected with the liquid crystal display screen, and an image on the image surface of the CCD detector is displayed through the liquid crystal display screen; and the CCD detector is connected with the data interface. The utility model has the advantages of low cost, light weight, small size, high imaging quality and strong imaging stability.

The invention discloses a device and a method for testing defocused spots and color deviation of an optical lens, and solves the problems that the testing precision is low and the spectral range of a tested optical system is limited due to the dependence on human eye observation, and the existing testing device is complicated to install and debug and low in testing efficiency. The CCD detector is used as an imaging unit, imaging testing can be carried out on the optical lens to be tested in the whole spectrum range, the energy distribution characteristics of the defocused spots of the optical lens can be truly reflected, and the actual application requirement of an optical system is met. The target surface of the CCD detector is directly imaged, high-precision and high-efficiency measurement of the defocused spots and the color deviation can be realized in cooperation with image processing software and a corresponding algorithm in the controller, and the measurement precision can reach 0.3 mu m.

The utility model discloses production auxiliary equipment based on COB integrated circuit board micro-expansion detection technology, which comprises a connecting base used for being connected to a conveyor belt, the connecting base is provided with a width-adjustable positioning structure and a length-adjustable positioning structure, the bottom of the connecting base is provided with a lifting mechanism, and the length-adjustable positioning structure is provided with a length-adjustable positioning structure. A circuit board supporting structure is arranged above the connecting base, the lifting mechanism is connected with the circuit board supporting structure, a CCD detector fixedly connected with the connecting base is arranged above the circuit board supporting structure, a circuit board which can be conveyed to the bottom of the CCD detector can be subjected to plane coordinate positioning, the accuracy of the CCD detector is improved, and meanwhile, the circuit board can be conveyed to the bottom of the CCD detector. The length and width of the positioning structure can be adjusted according to the length and width of the circuit board, the adaptability is higher, and the auxiliary detection is more comprehensive.

The present invention discloses a space-based small satellite payload excitation imaging method based on rotating-arm scanning, comprising the steps of: 1) building a reflective Fourier ptychography imaging system based on rotating scanning; 2) using a CCD detector to perform rotating scanning on the Fourier plane of the imaging system to obtain an N-frame sequence of low-resolution images; 3) preprocessing the acquired original low-resolution image sequence; 4) respectively using the registration methods of correlation function and speckle fractal dimension to register the preprocessed image sequence; 5) using the Fourier ptychography imaging algorithm to reconstruct the registered image sequence to obtain a restored image with improved resolution. The present invention expands the spectral range by performing rotating scanning of the CCD detector in the far field, and uses the Fourier ptychography reconstruction algorithm to quickly reconstruct the amplitude information and phase information of the far-field target object, obtaining a restored image with a resolution exceeding the diffraction limit of the system objective lens, effectively improving the imaging quality of the macroscopic reflective imaging system.

The invention discloses a testing device and a testing method for a powder fuel combustion transient spectrum, and relates to the technical field of powder fuel spectrum testing. The testing device comprises a shock tube system, a multi-channel oscilloscope, a spectrometer, an I CCD detector, a pressure sensor and a multi-channel digital delay pulse generator; an optical signal generated by powder fuel high-temperature self-ignition is transmitted to an I CCD detector, the time distribution of the measured optical signal and the time distribution of the I CCD detector meet a one-to-one corresponding optical system, and transient spectral information of powder fuel high-temperature self-ignition luminescence at different time is obtained. The device can realize nanosecond-level time resolution, is suitable for a rapidly changing combustion process, can obtain high-quality transient spectrum data by combining a high-resolution spectrometer and an I CCD detector, realizes measurement of a high-resolution transient spectrum of high-temperature self-ignition combustion of the powder fuel, and can be widely applied to transient spectrum measurement of the powder fuel.

The invention relates to the technical field of optical imaging control, in particular to a self-adaptive defocusing compensation device and method based on a laser spot, which utilizes a simple optical module and hardware circuit design, places a temperature sensor into an optical system, and calculates a defocusing amount through the joint calculation of temperature and a defocusing coefficient. The limitation that a traditional single defocusing detection method is easily influenced by noise by only utilizing geometrical optics is broken through, and a temperature variable is converted into a measurable feed-forward quantity from an interference factor by utilizing a global calibration method of temperature-defocusing coefficient and temperature-CCD detector defocusing displacement and a closed-loop adjustment method of coarse adjustment and fine adjustment in sequence; by combining the astigmatism method real-time defocusing detection technology, rapid defocusing compensation response can be achieved for defocusing amount generated by slowly changing temperature, meanwhile, the anti-interference capability and the control precision of the system are improved, and the imaging quality is guaranteed.

The present invention discloses an absolute radiometric calibration method for a color area array CCD camera based on a Bayer array. By using a highly stable LED light source combined with an integrating sphere to generate a stable and energy-adjustable uniform surface light source, and transferring the spectral radiance at the exit of the integrating sphere to the pixels of the area array CCD detector through a standard radiance meter, absolute radiation response calibration is achieved. In the present invention, by setting the magnitude of the LED light source current and setting the minimum value, typical value, and maximum value of the spectral radiance, an absolute radiation response calibration experiment of the color area array CCD camera is carried out under the condition of a single light source to determine the corresponding absolute radiation response coefficient, thereby eliminating the calibration uncertainty caused by detector response aliasing and effectively improving the accuracy of absolute radiometric calibration.

This application belongs to the field of aerospace technology and provides a CCD drive system that supports multi-degree-of-freedom image motion compensation functions. It includes an aircraft bus, a camera controller connected to the aircraft bus, and also includes a first gradient image motion timing generator, a first horizontal drive circuit, a first vertical drive circuit, a first area CCD detector, and a first detector front-end signal processing module; a second gradient image motion timing generator, a second horizontal drive circuit, a second vertical drive circuit, a second area CCD detector, and a second detector front-end signal processing module; a multi-degree-of-freedom image motion compensation image interface module, a multi-degree-of-freedom image motion compensation image registration module, a multi-degree-of-freedom image motion compensation image fusion module, a multi-degree-of-freedom image motion compensation image recorder, and a ground intelligence processing module. Without additional increasing the system complexity and components, this application realizes the multi-degree-of-freedom compensation function of an airborne camera and has the advantages of reducing the quality, volume, power consumption, and cost of the imaging system.

The utility model discloses a carrier envelope phase measuring device of an ultra-short pulse sequence, which comprises an ultra-short pulse light source, a beam splitting unit arranged on one side of the ultra-short pulse light source, a spectrograph arranged on one side of the beam splitting unit far away from the ultra-short pulse light source, a control unit arranged on one side of the beam splitting unit, and the spectrograph connected with the control unit. The control unit is connected with a piezoelectric transducer, and an interference adjusting unit is arranged on one side of the piezoelectric transducer. According to the utility model, high-precision measurement of the ultra-short pulse sequence CEP is realized, optical elements such as the beam splitter, the reflector and the piezoelectric converter are utilized, and the self-adaptive feedback control unit is combined, so that an optical path can be adjusted in real time to maintain the stability of interference fringes, and accurate phase information is obtained through the spectrograph and the CCD detector.

The present invention relates to the field of optical measurement technology and discloses a high-precision coaxial autocollimator optical system, comprising a beam expander objective lens, a first plane reflector, a second plane reflector, a beam splitting cemented prism, a pinhole stop, a beam expander eyepiece, and a laser light source, arranged in sequence along the incident direction of light. Light is split by the beam splitting cemented prism and then incident on a PSD position sensor and a CCD detector, respectively. The present invention utilizes a beam splitting cemented prism to coaxially position the PSD position sensor and the CCD detector at the end of the beam expander objective lens. This allows the system to simultaneously receive information reflected from the laser and independently measure it, combining the advantages of both the PSD position sensor and the CCD detector. The system has the advantages of a high frame rate, a large measurement angle, and high measurement accuracy.

The application belongs to the technical field of aerospace, and provides a driving circuit supporting multi-degree-of-freedom image motion compensation function, which comprises a camera controller, a multi-degree-of-freedom image motion compensation timing generator, a vertical driving circuit, a two-dimensional direction charge transfer area array CCD detector, a horizontal driving circuit, a front-end signal processing circuit and an interface circuit. The camera controller is connected with the multi-degree-of-freedom image motion compensation timing generator. The multi-degree-of-freedom image motion compensation timing generator is connected with the vertical driving circuit, the two-dimensional direction charge transfer area array CCD detector and the horizontal driving circuit respectively. The vertical driving circuit and the horizontal driving circuit are further connected with the two-dimensional direction charge transfer area array CCD detector. The two-dimensional direction charge transfer area array CCD detector is connected with the front-end signal processing circuit. The front-end signal processing circuit is connected with the interface circuit. The application can realize on-chip compensation of roll, pitch, yaw and multi-degree-of-freedom dynamic motion without moving parts.

This invention relates to a continuous three-dimensional particle field reconstruction method based on single-light-field imaging using EM deconvolution, belonging to the field of optical imaging technology. This method employs a light field camera to capture light field images of a discretized three-dimensional flow field, acquiring the light intensity information of scattered light emitted by particles on each pixel of a CCD detector. Based on the light intensity information, a weight matrix for each voxel is calculated, and the entire weight matrix is ​​loaded only once. The nth frame of the light field image is loaded, and the non-zero pixels in the nth frame are identified. The non-zero pixel sequence formed by the scattered light from tracer particles is extracted. An EM deconvolution algorithm is used to iteratively calculate the non-zero pixel sequence, updating the intensity of each voxel, thereby reconstructing the three-dimensional particle field of a single frame. The above steps are repeated to complete the reconstruction of the three-dimensional particle field from multiple frames of high temporal resolution light field images, resulting in higher reconstruction accuracy and consistency, and less time consumption.

The invention discloses an automatic adjustment method for AD9814 parameters in a CCD 275 imaging circuit, and belongs to the technical field of multichannel CCD detector imaging. The method comprises the steps that system parameters are initialized, and dark field images are collected; calculating a signal difference value of each channel and determining a gain sequence; collecting a background field image, and calculating a bias sequence; and finally, converting gain and bias parameters into AD9814 register code values and automatically configuring the AD9814 register code values. According to the method, the problem of image non-uniformity caused by multi-channel reading difference is effectively solved, and the accuracy and efficiency of parameter adjustment are remarkably improved.

The application provides a coaxial aiming system for target point positioning and aiming of a picosecond terminal optical path of inertial confinement fusion (ICF), which is composed of a projection mirror, a window, a main mirror, a secondary mirror, a lens group, a cylindrical mirror and a CCD detector, and each optical element is coaxial; the system multiplexes the projection mirror and the window in the picosecond terminal optical path, and does not need to additionally increase a target chamber flange window; the cylindrical mirror is used to correct the astigmatism aberration introduced by the large-angle inclined projection mirror; considering that the projection mirror needs to change the angle to accurately guide the position change of the laser landing point, under the illumination light source with the wavelength of 590nm±7.5nm and the working wavelength of 1053nm, the projection mirror is optimized for different use angles, and the high imaging resolution requirement can be realized; the coaxial two-mirror structure is adopted, and the structure is compact and small in size. In addition, the Cassegrain structure composed of the main mirror, the secondary mirror and the lens group and the cylindrical mirror are independently designed, and the later assembly and adjustment is facilitated.

This utility model relates to a CCD-based waste sorting mechanism, comprising: a mounting frame equipped with a CCD detector; a first feeding trough located at the upper end of the mounting frame; a second feeding trough located at the upper end of the mounting frame; a first discharge channel located inside the mounting frame, communicating with the lower end of the first feeding trough; a second discharge channel located inside the mounting frame, communicating with the lower end of the second feeding trough; a receiving bin located inside the mounting frame, below the first discharge channel; and a waste bin located inside the mounting frame, below the second discharge channel and communicating with its outlet. This utility model uses the CCD detector to identify the appearance of materials. The control system analyzes the data and, in conjunction with a robotic arm, quickly sorts the materials. It can distinguish between qualified and unqualified products and send them to the corresponding areas, resulting in high sorting efficiency and reducing the risk of misoperation.

The present invention relates to the field of optical imaging technology, and specifically to a method for correcting chromatic aberration of a tomographic microscope, comprising the following steps: S1: adding a quadratic phase grating, a blazed grating, a reflector, and a tube lens to the imaging optical path of the microscope; wherein the blazed grating includes multiple parts corresponding to the diffraction orders of the quadratic phase grating; S2: placing the sample to be observed at the object-side focal plane of the microscope objective, and placing the quadratic phase grating at the image-side focal plane of the microscope objective; S3: incident light first passes through the microscope objective and then sequentially enters the quadratic phase grating, the blazed grating, the reflector, and the tube lens, and finally forms an image on a CCD detector; the light wave at the quadratic phase grating is split into three diffracted light waves and projected onto the upper, middle, and lower portions of the blazed grating, respectively, to achieve chromatic aberration correction through dispersion subtraction. The present invention has a simple structure, low manufacturing cost, good chromatic aberration correction effect, and high light wave projection energy.

The utility model discloses a compact imaging spectrometer based on starlight occultation technology. The compact imaging spectrometer comprises a front optical system, a slit, a spectral imaging system and a CCD detector which are sequentially arranged along an optical path. The front optical system comprises a primary reflector and a secondary reflector, the slit is arranged perpendicular to the horizontal direction, and the secondary reflector, the primary reflector and the slit are sequentially and coaxially arranged. According to the spectrograph disclosed by the utility model, the absorption spectrum of oxygen molecules in the atmosphere can be obtained by utilizing a starlight occultation technology, relatively accurate oxygen density can be measured under the high spectral resolution of 0.1 nm, and environmental information such as atmospheric temperature, atmospheric density and the like can be indirectly obtained.