SU993774A1 - Versions of apparatus for measuring electric absorption and electric reflection of light - Google Patents

Abstract

1. A device for measuring electrical absorption and reflection of light containing a source of light, a source of modulating voltage, series-connected units for measuring and recording transmitted and reflected light from a sample, in order to increase sensitivity. additionally contains a modulating voltage pulse generator connected between the modulating voltage source and the sample, consisting of a series-connected photocell, a frequency divider and an amplifier, a rotating translucent mirror and a light intensity modulator made in the form of a disk having a concentric row of holes, located between the light source and the swiveling translucent mirror, with the swiveling translucent mirror optically connected to the sample and the photocell of the shape modulating voltage pulse bodies, measurement units contain selective narrowband amplifiers. tuned to differential frequency and. - o) - - a) 2, where the al-frequency of the light pulses at the output of the light modulator: 0) 2 the frequency of the pulses at the output of the Shaper of the pulses of the modulating voltage. 2. The device according to claim 1, comprising a light source, a source of modulating voltage, serially connected measurement and recording units of a light that is separated from a sample of light, about tl and which is tag- /. That, in order to increase (L senses. additionally contains a second light source, a modulating voltage pulse shaper, connected between the modulating voltage source and a sample, consisting of series-connected photocell, a frequency divider and an amplifier, a light intensity modulator, A two-concentric CA disk with two concentric rows of VI holes, located between the first XI source of light and the sample., where the photo element of the modulating voltage pulse generator is optically coupled to the second light source through the holes of the light intensity modulator disk, The measurement units contain selective narrowband amplifiers tuned to the difference frequency Q o / h - C02.

Description

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The device provides increased sensitivity and power when measuring electrical absorption and light reflection by detecting a signal at a difference frequency, which eliminates interference in the form of interference and frequency instability.

Claims (1)

The device provides increased 5 sensitivity and power when measuring electroabsorption and electroreflection of light due to registration of a signal at a difference frequency, which allows one to get rid of interference in the form of interference and frequency instability. / L Tehred M. Morgenthal Proofreader T. Malets