Optical apparatus for measuring objects having a rectilinear...

Details Optical apparatus for measuring objects having a rectilinear... Optical apparatus for measuring objects having a rectilinear...

2006-07-18

2006-07-18

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

C356S638000

Reexamination Certificate

active

07078719

ABSTRACT:
Apparatus for measuring an object (4) with at least one rectilinear edge or profile (4a,4b) parallel to a given direction (y), comprising: a laser source (1) which emits radiation (2, 2a) which impinges on the said edge or profile; a first cylindrical converging lens (5) the directrices of which are parallel to the direction (y), disposed downstream of the object (4); a spatial filter (6) disposed in the focal plane (A) of the first converging lens (5); a second converging lens (7) disposed downstream of the spatial filter (6); and photosensors (8) disposed in the focal plant (F) of the second converging lens (7).

REFERENCES:
patent: 3947129 (1976-03-01), Wiklund
patent: 4021119 (1977-05-01), Stauffer
patent: 4744654 (1988-05-01), Jinno et al.
patent: 4872757 (1989-10-01), Cormack et al.
patent: 5608530 (1997-03-01), Gates

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