Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1992-09-11
1993-11-02
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356240, G01N 904
Patent
active
052586111
ABSTRACT:
Light emission or absorption device used in combination with at least one optical detection device including a linear array of reception photodiodes having a view of articles for the contactless inspection thereof, in particular of glass articles at high temperature, comprises a casing equipped with an opening in the form of an elongate slot flanked by two parallel plates forming a light guide. The casing contains a semi-reflecting mirror, an illumination device situated behind the mirror with respect to the slot, and an alignment of a plurality of individual lamps placed so that the light emitted by the lamps is reflected by the mirror in the direction of the slot. It is thus possible to carry out an accurate alignment adjustment by means of the aligned lamps before carrying out the inspection in bright field, by switching on the tubes, or in dark field by switching them off.
REFERENCES:
patent: 4171481 (1979-10-01), Mima
patent: 4885461 (1989-12-01), Mattila et al.
patent: 4902137 (1990-02-01), Krieg et al.
Le Que T.
Nelms David C.
Verreries du Languedoc
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