Optical device having an optical film with an incident angle the

Details Optical device having an optical film with an incident angle the Optical device having an optical film with an incident angle the

1996-07-02

1998-09-01

Font, Frank G.

Optical: systems and elements

Absorption filter

With support or frame

385 60, 385 25, G02B 522, G02B 626, G02B 638

Patent

active

058018921

ABSTRACT:
An optical device having a collimating mechanism for converting light emitted from an excitation port into a parallel beam and outputting the parallel beam onto an optical path, an optical film provided so as to pass the parallel beam output from the collimating mechanism, and a supporting mechanism for supporting the optical film so that the optical film is rotatable about an axis inclined with respect to the optical path. The optical film is inclined with respect to a plane perpendicular to the axis. An incident angle of the parallel beam upon the optical film can be changed by rotating the optical film about the axis. Thus, the optical device having the optical film that can vary the incident angle thereupon can be provided with a simple structure.

REFERENCES:
patent: 4197008 (1980-04-01), Pinnow et al.
patent: 4548478 (1985-10-01), Shirasaki
patent: 4617338 (1986-10-01), Kraus
patent: 4995696 (1991-02-01), Nishimura et al.
patent: 5287214 (1994-02-01), Robertson et al.
patent: 5402509 (1995-03-01), Fukushima
patent: 5416867 (1995-05-01), Thorsten et al.
patent: 5579420 (1996-11-01), Fukushima

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