Method and apparatus for optically detecting the dimensions of a

Details Method and apparatus for optically detecting the dimensions of a Method and apparatus for optically detecting the dimensions of a

1993-05-25

1995-05-23

Rosenberger, Richard A.

Optics: measuring and testing

For light transmission or absorption

Of fluent material

356386, 356384, G01N 2100

Patent

active

054186161

ABSTRACT:
Two optical windows serve for the passage of a light beam through a treatment chamber in which a product is disposed whose dimensions are to be detected. Between the treatment chamber and each one of the optical windows there is disposed a rotary valve, which permits the separation of the optical window from the treatment chamber. Thus it is possible to prevent a medium that adversely influences the optical windows in the treatment chamber from gaining access to the interior face of the windows if protection of the windows has priority over a measurement. It is thus possible to considerably extend the service life of the windows.

REFERENCES:
patent: 4647199 (1987-03-01), Ferber et al.
patent: 4787750 (1988-11-01), Nelson et al.

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