SU629807A1 - Phase method for range finding in highly-absorbing media - Google Patents

Description

one

The invention relates to technical physics, in particular, to light transmission methods for measuring distances, and can be used to measure the optical lengths of multi-stage optical systems with high absorption.

The phase measurement method is known, but to which the phase of the sinusoidal signal of the modulated radiation reflected from the object is compared with the phase of the onor signal 1. The phase difference between these signals is horizontal and the measured distance.

A distance measurement method is known with the help of a phase-spaced distance meter, which is in comparison with the phase of the modulated radiation, taken after the distance has passed, with the phase of the reference voltage 2.

Measurement of the phase for a single circuit and an increase in accuracy is performed at a low frequency relative to the frequency of modulation of the source radiation. The modulation frequency is transformed in a photo receiver and by applying a heterodyne voltage to it. The luminance meter, built using this method of measuring distances, constructively combines the alternating and irregular parts in one device, and from this output, a signal is taken from the photoreceiver's output.

DUAL} is the distance measured.

However, when working without an ontic reflector, measuring distance with a large absorber. measurement accuracy is measured.

The purpose of the invention - pov1 Sh1Snie accuracy nzmerenn.

This is achieved by the fact that in the well-known. The method of measuring the distance between the medium and the large distance is located between the medium and the first half of the body), which is 3, e1 k), 1 spontaneously divided, and (10) the middle of the world with large hiiiM light globethene, they attract light sensitizer, they are light swordsman, they receive light swordsman, and they receive light swords. ; one is a photonic light, and the radiation reflected from the object, with the help of the same beam-splitting plate, is on the other; photon receiver photons of photon rods alternately G1od ;; l10; 1from an immersion phase difference.

Drawing 1 e npc.iCTaB.iciaia CT Xii scheme, rea.chnuyikmo before,; agmey1 system; measurements.

The device contains transmitting part 1, where the radiation source 2 enters. 2. Modulator 3, generator 1 4 .1 1l of the module modulator and forms the ontic 5, and the receiving part G, where the receiver 7 and 8 enters, the divider 1 telp plate 9, dp; 1 f () T1)

Claims (1)

A phase method for measuring distances in media with high absorption, in which the phase of the reference and received systems is compared using a phase light meter with different transmitting and receiving channels, characterized in that, in order to increase the accuracy of the measurement, the receiving part of the system is placed between the medium with large absorption and blown away. / goi. the distance to which the distance is measured, through the medium with high absorption, the beam is divided by a beam splitter to one photodetector, the radiation reflected from the object by the same beam splitter is connected to the phase difference meter by the other photodetector and the photoelectric outputs.