A Recording Polarimeter
- 1 August 1950
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 21 (8) , 693-698
- https://doi.org/10.1063/1.1745693
Abstract
A recording polarimeter has been constructed. The principle of operation is essentially the replacement of an operator in conventional visual polarimetry by a photoelectric servo system. A photo‐multiplier tube is used which, in conjunction with a mechanical chopping system, delivers an alternating current signal proportional to the unbalance. The latter is filtered and amplified and actuates a servo mechanism. The precision of the system is ±0.005° for static balance and the speed about 0.5° per minute. Hence the arrangement compares favorably with ordinary visual operation. The construction of the instrument is discussed briefly and its performance is illustrated by examples.Keywords
This publication has 1 reference indexed in Scilit:
- A Simplified Analysis of the Parallel-T Null NetworkReview of Scientific Instruments, 1947