Optics: measuring and testing – By configuration comparison – With photosensitive film or plate
Patent
1995-09-25
1997-06-03
Rosenberger, Richard A.
Optics: measuring and testing
By configuration comparison
With photosensitive film or plate
25055928, G01B 1106
Patent
active
056360274
ABSTRACT:
The invention relates to an apparatus intended especially for making a contactless measurement of the thickness of measurement objects made of transparent material. In the course of this measurement, two opposing beams produced by a first and second radiation source are directed through first and second beam splitters and through a deflecting device consisting of a body of transparent material having reflecting and refracting boundary surfaces. Thereafter, the beams are directed obliquely onto the surface of the object to be measured. The first and second component beams are reflected off the forward and rearward surfaces, respectively, of the object and are directed through first and second beam splitters onto first and second detecting devices. In order to facilitate a compact configuration and higher measurement precision, the first and second beam splitters define the incidence surfaces of the deflecting device facing towards the radiation sources.
REFERENCES:
patent: 3523736 (1970-08-01), Bottomley
patent: 4902902 (1990-02-01), Tole
Munkes Dieter
Sparschuh Georg
Spengler Stefan
Glaswerke Schott
Ottesen Walter
Rosenberger Richard A.
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