OBJECTIVE OPTICAL SYSTEM FOR THREE-DIMENSIONAL IMAGE CAPTURING AND ENDOSCOPE

摘要

Disclosed are an objective optical system for three-dimensional image capturing and an endoscope capable of easily suppressing inclination of two images with parallax and capable of acquiring bright three-dimensional images while the size of a device is reduced. Specifically disclosed is an objective optical system (1) for three-dimensional image capturing, which comprises a first prism pair (3) that converts light beams that are emitted from an identical object and that have two light axes juxtaposed to each other in a first direction so as to be substantially parallel to each other with a gap interposed therebetween into light beams juxtaposed to each other in a direction intersecting with the first direction with a gap interposed therebetween; and a second prism pair (5) that has light emitting surfaces juxtaposed to each other in a direction orthogonal to a direction along which the light beams are juxtaposed to each other before the light beams are incident on the first prism pair (3) and that converts the two light beams converted by the first prism pair (3) such that the gap between the light axes thereof is reduced.