Open AccessLight rangefinder of “0” class
Author(s) -
Ye.H. Hayrapetyan,
H.S. Petrosyan,
Hovnan A. Hunanyan
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/698/3/033051
Subject(s) - photodetector , multiplier (economics) , microwave , diode , signal (programming language) , modulation (music) , frequency modulation , optics , physics , computer science , optoelectronics , bandwidth (computing) , telecommunications , acoustics , economics , macroeconomics , programming language
When the light-emitting diode meter is operating in the middle linear region of the light modulation characteristics in the microwave range, photodetectors of the photoelectron multiplier (PMT) type do not restore changes in the demodulated signal depending on the distance. The solution of this problem using optical frequency conversion by introducing a second identical modulator at the second frequency is considered. According to this principle, the functional construction scheme of a rangefinder "0" class is proposed, the accuracy of which is estimated to be m φ = 0.01-0.02 mm.