Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen
Patent
1980-04-16
1982-06-01
Swisher, S. Clement
Thermal measuring and testing
Temperature measurement
In spaced noncontact relationship to specimen
G01J 156
Patent
active
043321682
ABSTRACT:
A radiometer has a concave mirror turnable about its optical axis and photoelectric converters which receive light waves reflected by the mirror and are mechanically coupled with the same. An interrupter disk is arranged in the path of the radiation which falls onto the mirror and has a side facing the mirror which is reflective. The converters are heated and a housing surrounds the mirror, the converters and the heater and is provided with a window located on the optical axis and permitting the admission of light to the mirror. An electronic circuit processes the various signals of the device. According to the invention the light-admitting window is arranged in the center of curvature of the hollow part-spherical mirror, which center of curvature is located behind or inwardly of the interrupter disk as seen in the direction of the incoming light. An arrangement is provided for producing a reference signal which is phase-locked with the rotation of the interrupter disk and a rectifier circuit of the electronic circuitry has a phase detector arrangement which is controlled by this reference signal.
REFERENCES:
patent: 3293915 (1966-12-01), Banca et al.
patent: 3601611 (1971-08-01), Kendall, Sr.
patent: 4171911 (1979-10-01), Aberle et al.
Aberle Claus
Ruger James F.
Schulz Klaus-Peter
Eltro GmbH
Handal Anthony H.
Meller Michael N.
Swisher S. Clement
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