Light source device for endoscopes

Details Light source device for endoscopes Light source device for endoscopes

1998-08-31

1999-11-30

O'Shea, Sandra

Illumination

Light fiber, rod, or pipe

With filter device

362574, 362560, 362293, F21V 704

Patent

active

059930373

ABSTRACT:
A light source device for endoscopes includes a light source for emitting white light containing the components of light belonging to a visible region and wavelength bands other than the visible region; at least, a rotary color separating filter on a field sequential system; and an infrared cutoff filter for blocking light in an infrared region, of a wavelength band of the white light. When the rotary color separating filter is disposed in an optical path from the light source to a light guide, an interference filter in which an interference film is applied to a transparent base plate is placed in the optical path. This arrangement obviates the defect of burning the entrance end of the light guide or of breaking the infrared cutoff filter.

REFERENCES:
patent: 4425599 (1984-01-01), Rieder et al.
patent: 4729018 (1988-03-01), Watanabe et al.
patent: 4807026 (1989-02-01), Nishioka et al.
patent: 4924856 (1990-05-01), Noguchi
patent: 4951133 (1990-08-01), Onoda
patent: 5007408 (1991-04-01), Ieoka
patent: 5078150 (1992-01-01), Hara et al.
patent: 5143435 (1992-09-01), Kikuchi
patent: 5513291 (1996-04-01), Buchin

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