Optics: measuring and testing – By shade or color
Patent
1999-06-24
2000-07-18
Evans, F. L.
Optics: measuring and testing
By shade or color
356429, 359509, G01J 350
Patent
active
060915013
ABSTRACT:
The invention relates to a method of keeping a measuring window of a measuring device clean, and to a measuring device. Gas is blown onto the surface of the measuring window (2) of the measuring device (1). Gas is guided onto the measuring window (2) by a nozzle (3) which is substantially on the same level with the measuring window (2).
REFERENCES:
patent: 3426200 (1969-02-01), Lehman et al.
patent: 3662174 (1972-05-01), McMullen et al.
patent: 4266142 (1981-05-01), Crawford
patent: 4602160 (1986-07-01), Mactaggart
patent: 5115342 (1992-05-01), Rowe et al.
patent: 5331178 (1994-07-01), Fukuda et al.
Moisio Hannu
Saikanmaki Timo
Evans F. L.
Neles Automation Oy
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