9 results about "Black body" patented technology

An apparatus for non-contacting measurement of the temperatures of rotatable elements, such as prism elements of a Risley prism assembly, includes IR emissive patches applied to radially outward facing surfaces of the rotatable elements, reflective surfaces configured to axially reflect black body IR radiation emitted by the patches, IR sensors located behind the rotatable elements and configured to sense the reflected black body radiation, and a controller configured to receive data from the IR sensors and determine therefrom the temperatures of the rotatable elements. In embodiments, none of the IR sensors extends radially beyond a housing of the rotatable elements, and in some embodiments the IR sensors do not extend radially beyond a diameter of a largest of the rotatable elements. The apparatus can further include patches oriented axially rearward and associated IR sensors.

The application discloses a device for acquiring a mathematical model for eliminating residual image of infrared image and a use method thereof, which comprises a black body, a lens, a baffle, a signal processing board and an interface board connected in sequence; the lens is directed to the black body and collects infrared rays emitted and / or reflected by the black body; the baffle is an infrared shutter; the signal processing board is used for controlling the lens and the baffle to work according to instructions from a computer; and the interface board is used for connecting the signal processing board with the computer through a network port, sending data to the computer and accepting instructions from the computer. In use, data acquisition is firstly performed; then a decay function is fitted; and finally the fitted decay function is verified, which specifically comprises multiple experimental verification, chip working temperature influence verification and adaptability verification at different temperatures. The application can better adapt to residual image characteristics, increase accuracy, reduce noise interference on fitting, enhance robustness, reduce redundant calculation, and effectively improve processing speed on the premise of ensuring residual image elimination effect.

Embodiments of the present application provide a satellite remote sensing instrument radiation calibration method, device, equipment and storage medium. Including: obtaining a first radiation calibration coefficient set; the first radiation calibration coefficient set is a set of radiation calibration coefficients obtained based on a preset radiation source arranged at the front end of the optical path of the satellite remote sensing instrument; obtaining a second radiation calibration coefficient set and a non-radiation transfer component temperature value; the second radiation calibration coefficient set is a set of radiation calibration coefficients obtained based on a preset black body arranged between internal optical path components of the satellite remote sensing instrument; the non-radiation transfer component temperature value is the temperature value of a non-radiation transfer optical path component inside the satellite remote sensing instrument that does not participate in radiation transfer when observing the preset black body; using the second radiation calibration coefficient set and the non-radiation transfer component temperature value as training samples, and using the first radiation calibration coefficient set as a training label to perform model training, to obtain a calibration coefficient conversion model. The present scheme can improve the accuracy of radiation calibration.

The present application belongs to the technical field of equipment calibration, and particularly relates to an infrared radiation measuring equipment response slope calibration device and method. The infrared radiation measuring equipment comprises a telescope barrel, and the calibration device comprises a cylinder, a lens cover, a diffuse reflection plate and a black body. The cylinder is sleeved on the outer edge of the front end of the telescope barrel, the lens cover covers the aperture of the cylinder, the diffuse reflection plate is attached to the inside of the lens cover and is synchronously turned with the lens cover, and the black body is arranged outside the lens cover and can be connected and detached. The aperture of the opening on the lens cover is smaller than the aperture of the black body. The calibration range of the method meets the requirements of low-end and high-end ranges, the cost is relatively low, and obvious economic benefits are achieved.

The application discloses a visible light and infrared dual-purpose axial plumb infinite distance target device and a calibration method, wherein the device comprises a base which is concave; a support platform which is installed in the middle concave part of the base; a reference platform which is installed on the support platform; a rack which comprises a vertical longitudinal arm and a horizontal arm which are perpendicular to each other, the longitudinal arm is vertically fixed on the base, and the horizontal arm is placed above the assembly reference platform; a black body light source, a fluorescent lamp and a Cassegrain collimator are sequentially arranged on the horizontal arm in the vertical direction, and the optical axis of the Cassegrain collimator is adjusted to be axial plumb. The device has high stability.

The present application belongs to the field of optical measurement and test, and discloses a high-temperature material spectral emissivity measuring device and method based on a temperature-controlled diaphragm. The measuring device is composed of a standard black body, a temperature-controlled diaphragm, an electrically-controlled rotating mirror, a sample heating furnace, a three-dimensional platform, an optical collimation system and a Fourier transform infrared spectrometer. The present application adopts a liquid circulation type temperature-controlled diaphragm, and the surface temperature of the diaphragm is the same as the laboratory environment temperature. In the spectral emissivity measurement, a diffuse reflection plate with a reflectivity of 1 does not need to be introduced, and a vacuum constant temperature system is also not needed. The present application can eliminate the influence of environmental radiation and atmospheric transmittance, and improve the spectral emissivity measurement precision. The present application designs a gradual diaphragm to realize the selection of the effective detection area of the material sample, and realizes the high dynamic range measurement of the infrared radiation signal in a wide temperature range.

Disclosed in the present application are a field-of-view testing method, apparatus and system based on an infrared imaging system. The method comprises: acquiring an initial response signal when a diaphragm is not provided; providing a diaphragm and adjusting an aperture and a spacing value to obtain a plurality of groups of detection signals; if only a test result for one detection direction needs to be acquired, analyzing to obtain a spatial angle of each group of initial detection parameters; converting the detection signals into two-dimensional grayscale maps, and performing image processing to obtain image pixel parameters; and performing linear fitting on the spatial angles and the image pixel parameters of the plurality of groups of detection signals to obtain a test result of a field of view. The field-of-view test method converts detection signals into two-dimensional grayscale images and performs image processing, and performs linear fitting on spatial angles and image pixel parameters of a plurality of groups of detection signals, which effectively avoids the impact on a test result caused by the non-uniformity of infrared rays irradiated on the central region and the edge of the surface of a black body, thereby improving the reliability of field-of-view tests for infrared imaging systems.