Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1986-07-14
1988-12-20
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250236, 356387, 350444, 350 68, G01N 2186, H01J 314
Patent
active
047926953
ABSTRACT:
An apparatus for the non-contacting measurement of rod-shaped objects contains a telecentric, F-theta-corrected objective which comprises two catadioptric elements. The first catadioptric element is a Mangin mirror and the second catadioptric element is a plane plate mirror-coated at the front, while a third optical element is a meniscus lens. The use of catadioptric elements permits a simplified and inexpensive form of construction which is also compact, as a result of which objects with large dimensions can be measured quickly and accurately. Such an apparatus serves, in particular, for the continuous control of the production of filament-shaped objects.
REFERENCES:
patent: 3520586 (1970-07-01), Bousky
patent: 3667360 (1972-06-01), Vicik
patent: 3825322 (1974-07-01), Mast
patent: 3858046 (1974-12-01), Cubalchini
patent: 4188091 (1980-02-01), Fujii
patent: 4196961 (1980-04-01), Walter et al.
patent: 4342503 (1982-08-01), Shafer
patent: 4487483 (1984-12-01), Versteeg
patent: 4508422 (1985-04-01), Karlsson
patent: 4639141 (1987-01-01), Kuwabara et al.
patent: 4717823 (1988-01-01), Steimel et al.
Messinger Michael
Nelms David C.
Zumbach Electronic AG
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