OPTOELECTRONIC DEVICE FOR MEASURING LINEAR DISPLACEMENTS OF OBJECT Russian patent published in 2024 - IPC H01L31/16 G01B11/00 

FIELD: control and measuring equipment.

SUBSTANCE: invention relates to control and measuring equipment and can be used, in particular, in vibration tests for measuring, for example, vibration amplitude or displacement of an object. Optoelectronic device for measuring linear movements of an object comprises radiation source (1), frequency generator (13) and installed sequentially along the light beam collimator (2), optical path (3), slit diaphragm (4), focusing lens (5), pinhole aperture (6), photodetector (7), demodulator (8), to the output of which band-pass filter (9) and low-pass filter (10) are connected in parallel, the outputs of which are connected to correction unit (11), after which registration unit (12) is installed. Optoelectronic device further comprises a beam power stabilization system configured to control voltage at the output of the photodetector, which includes radiation source power control unit (14), regulator (15), setpoint selector (16), analogue switch (17) and comparator (18). Output of power control unit of radiation source (45) is connected to radiation source (1) and first input of analogue switch (35), wherein second input of analogue switch (36) is connected to output of photodetector (22), respectively. Output of analogue switch (37) is connected to second non-inverting input of comparator (39). First inverting input of comparator (38) is connected to output of setting device (40), wherein output of comparator (41) is connected to input of controller (42). Output of controller (43) is connected to input (44) for controlling the conversion coefficient of photodetector (7). Measurement object is designated by position (19).

EFFECT: invention increases accuracy of measurements and efficiency of operation of the optoelectronic device by eliminating the effect of strong background illumination and excluding the transition of the photodetector to saturation mode, as well as loss of operability of the device caused by this transition.

1 cl, 1 dwg