Light source device for endoscopes

Surgery – Endoscope – Having imaging and illumination means

Patent

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Details

600180, 600181, A61B 100

Patent

active

060865318

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.

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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

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