Measuring instrument and measuring method for identifying proper

Details Measuring instrument and measuring method for identifying proper Measuring instrument and measuring method for identifying proper

1992-09-18

1993-09-21

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214R, 356436, G01N 2100

Patent

active

052471870

ABSTRACT:
A measuring instrument and a method of measuring including providing an illumination arrangement having a plurality of independent illumination sources, a specimen region for conducting a specimen illuminated by the illumination arrangement, a measuring arrangement detecting radiation influenced by the specimen in the specimen region, the illumination arrangement having a plurality of independent aluminum sources which are energized by separate leads and separate switch elements that are operable to selectively operate either individually or in common for a linearity check.

REFERENCES:
patent: 4640621 (1987-02-01), Rose
patent: 4670741 (1987-06-01), Cole

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