Optical scanner with self contained standardization means

Details Optical scanner with self contained standardization means Optical scanner with self contained standardization means

1993-02-04

1994-08-30

Hille, Rolf

Optics: measuring and testing

By monitoring of webs or thread

For flaws or imperfections

356436, G01N 2117, G01N 2186

Patent

active

053432967

ABSTRACT:
An apparatus for optically scanning and measuring the physical parameters of a sheet material by means which are fully enclosed within an air purged cross-machine box-beam structure to protect the radiation source, the radiation detector and the optics from the harsh machine environment. The apparatus may involve a single beam enclosing a combined source/detector module for reflection measurement or dual beams on opposite sides of the sheet for transmission measurement with one enclosing a source module and the other enclosing a detector module. Standardization means are also provided either in the module itself or as an extension of the beam. Means are also disclosed for sealing the opening in the beams through which the radiation passes.

REFERENCES:
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patent: 4319847 (1982-03-01), Howarth
patent: 4748400 (1988-05-01), Typpo
patent: 4766315 (1988-08-01), Hellstrom et al.
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patent: 4801809 (1989-01-01), Burk et al.
patent: 4879471 (1989-11-01), Dahlquist
patent: 4950911 (1990-08-01), Williams et al.
patent: 5019710 (1991-05-01), Wennerberg et al.
patent: 5073712 (1991-12-01), Hellstrom

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