Patent
1981-06-22
1983-09-20
Henry, Jon W.
350317, G02B 520, G02B 700
Patent
active
044052065
ABSTRACT:
The invention is a filter device for the filtration of radiation in a device for measuring radiation. The filter device comprises several different filters fitted into one detachable disk. The filter device comprises a magnet which is placed at a vertical plane passing through the center axis of the filter disk, not higher than at the level of the center axis. The filter disk includes a second magnet placed at the center axis of the disk. The opposite poles of these two magnets are arranged as facing towards each other.
REFERENCES:
patent: 2953970 (1960-09-01), Maynard
patent: 3320018 (1967-05-01), Pepke
Henry Jon W.
Labsystems Oy
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