Experimental estimation of an Infrared microscopic system point spread function
Fecha
20162016
Institución
Resumen
In this work the point spread function of an infrared (IR) microscope was estimated. The experimental set-up is composed of an objective lens Janos Technology Asio, where scene size is 1.49x1.99 mm, with a spatial resolution of 256x320 pixels, which operates in the middle band of the infrared spectrum. The camera used with the lens is a brand Sofradir model EC-IRE 320M, and its spectral response is between 3.7 and 4.8 microns. The analog/digital converter is 14-bit with a frame rate of 1 to 320Hz. The set-up considers a black body radiator brand Mikron model M315X12, it operates since room temperature to 400 °C with a thermal resolution of 0.1 °C.
The estimation of PSF was performed, where is assumed that the two-dimensional PSF can be written as a product of a component in the x axis and the y axis. Then, such both components are registered using a scene where an abrupt step is recorded. In this case, a step temperature is generated by the black body and a metal Target. The results is shown and validated by correcting a blurred image using the PSF with a deconvolution algorithm, using infrared-simulated and real IR data.
Key words: Infrared Imaging; Point Spread Function (PSF); Restoration Image; Optical System; Image Processing.