Multispectral Line Pyrometer Based on Orthogonal Cylindrical Lens System Sensor

Multispectral pyrometers are still limited in instrument development to prism based single point measurement, while multi-point line temperature measurement requires complete replication of the optical and circuit systems of a single point, with complex equipment, high costs, and can only achieve measurement of a limited number of temperature points. Due to the different distances from each measured point to the optical axis in multi-point line temperature measurement, there are significant off-axis aberrations caused by far-field transmission and prism splitting, which affects the extraction of radiation energy from the specified area of the target filled with specified solid angles. In order to solve the problem of severe aberrations in the far-field transmission of multi-point radiation in line measurement, a multispectral line pyrometer based on orthogonal cylindrical lens group was proposed, which achieved the best matching between the radiation at each point on the line and the detector array. By utilizing a high-speed synchronous data acquisition system, high-quality radiation information was obtained. Combined with the proposed improved 2D graphical multispectral radiation temperature inversion algorithm based on improved CCPCANet, the goal of achieving accurate measurement of multi-point line temperature simultaneously with only one optical path system was achieved.