IMPROVEMENTS IN OR RELATING TO RADIATION PYROMETERS
A radiation pyrometer is described that is suitable for measuring the surface temperature of metal bars in passage through a narrow zone between a heating zone and a quenching zone at temperatures in the range 650 to 750 deg C. The pyrometer consists of a rod of material capable of transmitting radiation over the wavelength interval lambda /sub 1/ to lambda /sub 3/. The rod has breaks for the first and second radiation choppers, and has a shaped radiation receiving end for partly encircling the radiation source. The radiation transmission path has a radiation receiving end for positioning adjacent to a radiation source, a photocell at the other end for receiving the transmitted radiation, a first radiation chopper in the path having wavelength transmission intervals lambda /sub 1/ to lambda /sub 2/ and lambda /sub 2/ to lambda /sub 3/, where lambda /sub 2/ lies between lambda /sub 1/ and lambda /sub 3/, so t hat the photocell receives alternate signals related to the transmission intervals lambda /sub 1/ to lambda /sub 2/ and lambda /sub 2/ to lambda /sub 3/ respectively. A secon d radiation chopper in the path provides a carrier signal for the alternate signals and means for determining the ratio of amplitude of the alternate signals. (N.W.R.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-027836
- OSTI ID:
- 4843569
- Report Number(s):
- GB 874000
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- United Kingdom
- Language:
- English
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