Method and device for monitoring the transparency of a laminated

Details Method and device for monitoring the transparency of a laminated Method and device for monitoring the transparency of a laminated

1993-03-03

1994-11-08

Hille, Rolf

Optics: measuring and testing

Lens or reflective image former testing

For optical transfer function

356124, 356432, G01M 1100, G01B 900, G01N 2100

Patent

active

053631889

ABSTRACT:
A method and a device for monitoring the transparency of at least a portion of a preassembled laminated pane by analysis of the luminous intensity of the image of a test pattern viewed through the portion of the pane. The luminous intensity, picked up by a detector, of each point of the test pattern viewed through the pane is digitized to produce a number. The numbers obtained for the points of one same image are then averaged, the average obtained being compared with a previously determined theoretical value.

REFERENCES:
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patent: 4380396 (1983-04-01), Arndt et al.
patent: 4400089 (1983-08-01), Farabaugh
patent: 4558948 (1985-12-01), Picard
patent: 4586817 (1986-05-01), Ehemann, Jr.
patent: 4647197 (1987-03-01), Kitaya et al.
patent: 4772120 (1988-09-01), Pointeau
patent: 5126550 (1992-06-01), Lisson et al.

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