Rotary drum type optical filter apparatus

Details Rotary drum type optical filter apparatus Rotary drum type optical filter apparatus

1997-01-28

1999-09-14

Spyrou, Cassandra

Optical: systems and elements

Absorption filter

Movable in or out of optical path

359890, 359892, 359773, 356418, G02B 522

Patent

active

059531690

ABSTRACT:
The present invention relates to a rotary drum type optical filter apparatus, which comprises a filter unit for receiving an optical signal to spectralize the optical signal; a lens unit provided at the center of the filter unit for varying an optical path of the optical signal; and a driving device engaged with the filter unit for providing a displacement of the filter unit relative to the lens unit to obtain different spectrum colors of the optical signal.

REFERENCES:
patent: 5220464 (1993-06-01), Lin
patent: 5363247 (1994-11-01), Liu et al.

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