PULSE PHOTODETECTOR Russian patent published in 2019 - IPC G01J1/04 G02B26/02 H01L31/232 

FIELD: optics.

SUBSTANCE: invention relates to receiving optical radiation and a pulse photodetector. Device includes a photosensitive element, a signal processing circuit and an optical gate mounted in front of the photosensitive element. Optical gate is made in the form of a shutter with two working positions. Device incorporates a shutter drive including a flat spring with its ends tightened by tensioning so that the spring forms an arc. One end of the spring is free, and the second one is fixed on the housing of the PDC. Chord of the arc is formed by an elongation creating a tightening force. Stretching is a current-conducting thread, to the ends of which an external source of control electric signal is supplied, at supply of which thermal expansion of the tension from its heating by flowing electric current is equal to value Δc, and arc arrow h is selected from condition of provision of specified gear ratio.

EFFECT: technical result consists in ensuring the device operability under active and passive laser counteracting conditions with minimum dimensions and maximum sensitivity for weak input signals.

5 cl, 4 dwg