Optical filter apparatus

Details Optical filter apparatus Optical filter apparatus

1997-02-25

2000-07-11

Chang, Audrey

Optical: systems and elements

Absorption filter

With support or frame

359889, 359891, 359634, 348336, 348337, G02B 522, G02B 2714, H04N 907

Patent

active

060881755

ABSTRACT:
In an optical filter apparatus in which a filter loading disk having a plurality of filters is rotated around a rotation axis so as to position a desired filter onto an optical axis of a color separation prism, the filter loading disk and the rotation axis are unitedly formed, while the rotation axis is supported by a housing member disposed in front of and behind the disk, thereby reducing the number of parts to decrease the manufacturing cost of the apparatus while preventing the disk from fluctuating upon rotation. In a filter disk (8), a disk holding section (8A) holding a plurality of filters (9) and an axis section (8B) are unitedly formed, thereby reducing the number of parts. The axis section (8B) is supported by an axial hole (1A) and an axial hole (4A) of a dust cover (4) so as to increase the fitting length of the axis section (8B), thereby preventing the filter disk (8) from fluctuating upon rotation.

REFERENCES:
patent: 3610818 (1971-10-01), Bachmann
patent: 4524383 (1985-06-01), de Rooij
patent: 4549787 (1985-10-01), Tanner
patent: 5005947 (1991-04-01), Sibilo et al.

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