Lighting system for an endoscope
AssigneePENTAX Corporation
InventorShunichi Ito
Life of this patent
Estimating the term…
Abstract
A lighting system for an endoscope includes a lamp positioned so that an optical axis thereof is oriented horizontally; a light guide having an incident end upon which the illuminating light from the lamp is incident; a diaphragm plate rotated about a pivot so as to advance into and retract from an optical path of the illuminating light, the pivot extending parallel to the optical axis of the lamp and positioned above or below the optical path. The diaphragm plate includes a notch which is formed at one end of the diaphragm plate, the notch being positioned along an arc which is centered about the pivot and which intersects a center of the light guide when the diaphragm plate rotates about the pivot; and a large number of minute perforations formed along and below the arc.
Claims10
A lighting system for an endoscope, comprising:
- a lamp for supplying illuminating light, said lamp being positioned so that an optical axis thereof is oriented horizontally;
- a light guide having an incident end upon which said illuminating light from said lamp is incident;
- and
- a diaphragm plate rotated about a pivot so as to advance into and retract from an optical path of said illuminating light, said pivot extending parallel to said optical axis of said lamp and positioned one of above and below said optical path;
- wherein said diaphragm plate comprises:
- a notch which is formed at one end of said diaphragm plate, said notch being positioned along an arc which is centered about said pivot and which intersects a center of said light guide when said diaphragm plate rotates about said pivot, and
- a large number of minute perforations formed along and below said arc.
Dependencies are inferred from the claim text.