SU1251007A1 - Optical radar - Google Patents

Description

The invention relates to optical instrumentation and can be used to locate water surface to control oil and fuel spills.

The purpose of the invention is to improve the accuracy of measurements of the reflected optical signal from the irradiated water surface.

 The drawing shows a structural diagram of an optical locator.

The device comprises a radiation source 1, a modulator 2 with a sector disk 3, a flat mirror 4, a lens 5, photodetectors 6 and 7, and a recorder 8.

The device works as follows.

The radiation from the radiation source 1 is alternately reflected towards the water surface 9 either by a sector disk 3 of the modulator 2 or by a flat mirror 4. The radiation reflected from the water surface 9 is collected by the mirror lens 5 and directed to the photodetectors 6 and 7 o The photodetector 6 reacts to the radiation reflected by a flat mirror 4 and surface 9, and a photodetector 7 - to radiation reflected by a sector disk 3 and surface 9. When this is done by turning the sector disk 3 of the modulator 2 relative to the optical axis, and not by moving the photo In principle 7, the selection of the locating portion of the water surface 0- {located from the portion O at a distance is provided.

Editor L. Pchelinska Order 4406/42

Compiled by B. Dosov

Tehred V. Kadar Proofreader L, Pilipenko

Circulation 728 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35 ,, Raushsk nab ,, d, 4/5

Production and printing company, g. Uzhgorod, st. Project, 4

commensurate with the wave scale, which makes it possible to compensate for the influence of waves on the variability of the signal taken from the photodetector,

5 Signals recorded by photo receivers 6 and 7 are fed to the recorder 8. Since these signals are 180 ° out of phase, they must be sent to the recorder through

Differential amplifier 10, which also reduces the power requirements of the radiation source 1.

Claims (1)

 5 claims Optical locator containing sequentially located on the same optical axis a radiation source, modulator, made in the form of a sector disk, a flat mirror mounted at an angle of 45 ° to the optical axis, as well as a lens, a photodetector mounted in the focal plane of the lens, and a recording unit, characterized in that, in order to improve the accuracy of measurements of the reflected optical signal from an agitated water 30 surface, in the focal plane of the lens is additionally installed a second photodetector connected to the registration unit, and the modulator is installed with the possibility of rotation 35 to the plane of rotation of the sector disk relative to the optical axis, the surface of the sector disk facing the radiation source being mirrored. 20 25