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:
Sep. 12, 1989
Filed:
Jul. 22, 1988
Felix Ams, Kaempfelbach, DE;
Michael Voegele, Kaempfelbach-Ersingen, DE;
Richard Wolf GmbH, , DE;
Abstract
A video endoscope having a semiconductor image converter which is incorporated in the endoscope and which receives the image of the object illuminated periodically by an illumination device with a sequence of partial colors, for example by using a filter wheel, and converts same into video signal components which correspond to partial color separations of the image and which are read successively and selectively separated according to partial colors into an intermediate store and are then read out simultaneously for the formation of an individual image and are processed for the representation of the image into television-compatible video signals, in which the lamp of the illumination device is pulsed with variable pulse amplitudes. The pulsed operation of the lamp is a function of the number of partial colors to be generated with an even-numbered multiple of the image repetition frequency, in which respect the light flux of the light pulses emitted by the lamp is variable as a function of the actual value of the respective amplitudes of the video signals, in order, in a predetermined range of regulations, to bring the actual value to a desired value. Arranged in the beam path of the lamp is an optical regulating element which undertakes a further regulation of the light intensity outside of the range of regulation.