METHOD AND DEVICE FOR THE HARD-TO-REACH OBJECTS OPTICAL CHARACTERISTICS SPATIAL DISTRIBUTION REGISTRATION Russian patent published in 2018 - IPC G01N21/45 G02B9/02 G02B23/24 

FIELD: lighting.

SUBSTANCE: method consists in the fact, that the object is illuminated with broadband light, forming the radiation beam that carries the object image, dividing it into two identical beams, one of which is spatially filtered, forming wave with known wave front shape, combining the wave fronts propagation directions, performing these beams spectral filtration and recording the two-dimensional spectral interference image. Repeating this procedure for all necessary spectral components and processing the spectral interference images using the digital holography or optical coherence tomography, producing the object amplitude-phase characteristics spatial distribution. Device consists of input optical system, two-beam Michelson interferometer, containing light splitter and flat mirrors in the identical reference and object arms, intermediate optical system, adjustable images monochromator, and matrix radiation receiver. Radiation is focused in the flat mirrors on reference and object arms, at that, a point diaphragm is installed in the reference arm in the focusing plane.

EFFECT: possibility of interference images recording in narrow spectral intervals, reducing to the external flares sensitivity and improving the operation stability.

9 cl, 2 dwg