THERMAL IMAGING TECHNIQUE AND DEVICE Russian patent published in 2008 - IPC G01J5/00 

FIELD: measuring techniques.

SUBSTANCE: infrared image of an object is formed on the receiver of a matrix electronic image detector. Supplementary spectral selection of radiation incident on the image detector in the wavelength range from 7μm to 14μm is achieved through a spectral-selective element, whose wavelength is a monotonous function of transmission. There is extra registration of electrical signals from the matrix electronic image detector, analogue-digital conversion of data signals and formation of an extra array of digital data of the object image. An array of the digital data of the temperature of the object is formed by determining the ratio of corresponding elements of the fundamental and supplementary arrays of digital data of the image of the object.

EFFECT: increased accuracy in determining temperature of weakly heated objects.

10 cl, 6 dwg