Optical reference, and a method of using same

Details Optical reference, and a method of using same Optical reference, and a method of using same

2008-06-05

2009-12-01

Hannaher, Constantine (Department: 2884)

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

Reexamination Certificate

active

07626169

ABSTRACT:
A detector calibration reference is disposed along a path of travel for radiation that extends from a radiation source to a radiation detector. The detector calibration reference has mutually exclusive first and second portions that are offset in a direction transverse to the path of travel, the first portion being substantially opaque to radiation from the source, and the second portion being substantially transmissive to radiation from the source. The detector calibration reference is moved relative to the path of travel in a manner so that the first and second portions become successively aligned with the path of travel.

REFERENCES:
patent: 3578975 (1971-05-01), Wheeler
patent: 5148233 (1992-09-01), Imamura et al.
patent: 5811811 (1998-09-01), Naya

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