Light source system for endoscope

Details Light source system for endoscope Light source system for endoscope

1991-08-21

1993-08-17

Coles, Sr., Edward L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

128 6, H04N 718, A61B 106

Patent

active

052374033

ABSTRACT:
A condenser lens is provided between a light source and the incident end of an illumination light guide, and at least one pair of plane-parallel plates are disposed on the illumination light path at a position between the light source and the condenser lens in such a manner that the plates are in symmetry with each other with respect to the optical axis of the illumination light path. The plane-parallel plates are pivoted by a pivoting device about an axis of rotation which extends perpendicular to the optical axis of illumination light and parallel with the plane-parallel plates, thereby partially intercepting the illumination light path, and thus adjusting the quantity of light which is applied from the light source to the illumination light guide.

REFERENCES:
patent: 4834071 (1989-05-01), Hosoi et al.
patent: 4868645 (1989-09-01), Kobayashi
patent: 5042915 (1991-08-01), Akutsu et al.

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