The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 1982
Filed:
Feb. 27, 1980
Kabushiki Kaisha Medos Kenkyusho, Tokyo, JP;
Abstract
An illuminating light control device for an endoscope for controlling both the intensity and hue of illuminating light over a wide range. A shutter mechanism is disposed between a discharge lamp light source and the receiving end of an optical fiber bundle. The shutter mechanism may be moved between at least three positions. At the first position, the light is allowed to pass directly from the light source to the optical fiber bundle and the light source is allowed to vary between its maximum and minimum limits. At the minimum limit, the shutter mechanism disposes a transmission light control means in the light path and the light source is returned to its maximum limit whereupon the output light to the optical fiber bundle is the same before the change as afterward. The light source can then be varied again between its maximum and minimum limits thereby effectively doubling the range of light output intensity. The shutter can also be moved to a position which blocks the optical path for a photographing operation.