A switch-type imaging fiber apparatus and a branch-type imaging fiber
apparatus are provided. Light emitted from a laser light source is made
incident on an opening of an IF (image fiber) guided by a GM
(galvanometer), output from an optical system provided at a leading end
portion of the IF, and applied to an observation target. The light
reflected by the observation target is sent back to the IF, transformed
into parallel light by an f.theta. objective lens, reflected by a
dichroic mirror, made incident on an image pickup device (CCD) via an
imaging lens, and can be observed on a monitor. The GM is controlled to
switch to make the light incident on the opening of an arbitrary one of a
plurality of IFs. Accordingly, observation can be performed by focusing
the light solely on the arbitrary IF.