Bichromatic pyrometer

Details Bichromatic pyrometer Bichromatic pyrometer

1994-03-30

1996-04-16

Gutierrez, Diego F. F.

Thermal measuring and testing

Temperature measurement

In spaced noncontact relationship to specimen

374131, 374153, 356 45, G01J 508, G01J 530, G01J 560

Patent

active

055075762

ABSTRACT:
A bichromatic pyrometer for detecting the high temperature of a surface element of an object comprises two photodiodes (18, 19) receiving radiation from the object, each of the photodiodes having a large forbidden band and being sensitive to radiation in a given range of wavelengths, said sensitivity ranges being different and being situated in the visible or near visible regions of the spectrum, said ranges being obtained by selecting the value of the forbidden band of the material constituting each of the photodiodes (18) and (19), said forbidden band being greater than or equal to that of silicon (.gtoreq.1.11 eV). The pyrometer is capable of measuring rapidly changing surface temperatures with great accuracy.

REFERENCES:
patent: 2237713 (1941-04-01), Russell
patent: 3435237 (1969-03-01), Collins
patent: 3611805 (1971-10-01), Nishikari
patent: 3715922 (1973-02-01), Menge
patent: 3922550 (1975-11-01), Crowley et al.
patent: 3992943 (1976-11-01), Schiefer et al.
patent: 4326798 (1982-04-01), Kahn
patent: 4692025 (1987-09-01), Tani et al.
patent: 4764025 (1988-08-01), Jensen
patent: 4765752 (1988-08-01), Beynon et al.
patent: 4797006 (1989-01-01), Masom
Japanese Patent Abstract JP 61225626 dated Jul. 10, 1986.

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