Filter device

Details Filter device Filter device

2009-02-25

2010-06-15

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Absorption filter

With support or frame

C359S722000

Reexamination Certificate

active

07738199

ABSTRACT:
A filter device has a frame, an optical filter, two magnetic members and two covers. The frame has a window and two rails attached to the opposite sides of the window. Each rail has two coil holding portions. The optical filter is able to slide between the rails and has at least one lens and two holders holding the magnetic members. The covers hold the optical filter between the rails. Thus the filter device is able to prevent the coils from wear-out failures with a simple and enduring structure.

REFERENCES:
patent: 7158323 (2007-01-01), Kim et al.
patent: 2007/0133967 (2007-06-01), Takahashi et al.

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