DEVICE FOR DETERMINING COORDINATES OF FLARED-UP OBJECT Russian patent published in 2016 - IPC G01S17/66 G01S3/78 

FIELD: optics.

SUBSTANCE: invention can be used for determining coordinates of a flared-up object against background of noise. Serially arranged on one optical axis of the device are modulating element (1) made in the form of Fourier hologram sighting mark, lens (2) and photodetector (3) arranged in the back focal plane of lens (2). Output of photodetector (3) is electrically connected to the input of electronic analysing unit (4). Before hologram (1) there is diffraction grating (5), spatial frequency of which is equal to the spatial frequency of hologram (1). Marks of diffraction grating (5) are oriented in parallel to the strokes of hologram (1). Hologram (1) is located in minus first order of diffraction grating (5).

EFFECT: faster determination of coordinates of the flared-up object and spectral composition of the reflected optical radiation on the background noise.

1 cl, 2 dwg