Endoscope

摘要

The object lens 21 and the ocular lens 22 are disposed in the lens barrel unit 11 and the relay lens system 23 is disposed therebetween. The image sensor 31 is disposed in the camera unit 12 and the coaxial illumination unit 32 is disposed therearound. The focus position shift member 25 is disposed at the image formation position L1 in the lens barrel unit 11. The light from the coaxial illumination unit 32 is imaged at the image formation position L1 and is shifted to a position L2 by the focus position shift member 25. Since the position L2 positions at a position closer than a focus position, light through the object lens 21 diffuses to illuminate the object 51.

主权项

1. An endoscope comprising:
a lens barrel unit that has a relay lens system; a camera unit that is connected to a base end side of the lens barrel unit and has an imaging device imaging an object through the relay lens system; a coaxial illumination unit that is disposed coaxially with the imaging device to surround the imaging device and illuminates the object through the relay lens system; and a focus position shift member that is disposed at one of a plurality of image formation positions in the relay lens system and shifts a focus position of illumination light from the coaxial illumination unit.