Patent ID: 8947514
Filing Date: 2015-02-03
Classification: A61B,G02B,H04N

Abstract:
1. An endoscope system comprising: a light source system configured to emit illumination light on a target area; a scanner configured to periodically scan the illumination light over a target area, said scanner comprising a fiber driver that vibrates a tip portion of a scanning fiber in two dimensions to scan the illumination light, vibration of the tip portion of the scanning fiber determining a scan path of the illumination light, the scan path in each frame occurs over a time interval defining a frame of an object image; an imager configured to receive the illumination light reflected from the target area and to acquire a sequence of image-pixel signals in succession; a luminance detector that detects, in succession, a sequence of luminance data of the object image from the sequence of image-pixel signals; and a brightness adjuster that adjusts the brightness of an observed image on the basis of the sequence of luminance data, said brightness adjuster adjusting an amount of illumination light in accordance with a scanning position of the illumination light on the scan path, such that the amount of illumination light in the frame which occurs over the time interval is time-sequentially changed, wherein the brightness adjuster determines the amount of illumination light in a current frame by correcting the amount of illumination light in a previous frame.