光学素子、それを備えた光学系及びそれを用いた内視鏡
- 专利权人:
- オリンパス株式会社
- 发明人:
- 研野 孝吉
- 申请号：
- JP2007180150
- 公开号：
- JP5025354B2
- 申请日:
- 2007.07.09
- 申请国别(地区):
- JP
- 年份:
- 2012
- 代理人:
- 摘要：
PROBLEM TO BE SOLVED: To provide an inexpensive optical device capable of imaging an omnidirectional image in the direction substantially orthogonally crossing with a central axis on an imaging device in a simple constitution, and being a small type having less strain in image and favorable F-&theta characteristics to provide an optical system with the same and to provide an endoscope using the same.
SOLUTION: The optical device consists of a transparent medium L1 having a field angle of one side approximately 90° about the direction orthogonal to the central axis 2 in the cross section including the central axis 2, being rotation symmetry about the central axis 2 and having a refraction index larger than 1, wherein the transparent medium L1 has a first transmission face 11 disposed in the outermost circumference from the central axis, a first reflecting surface 12 disposed closer to the central axis 2 than the first transmission face 11, a second reflecting surface 13 disposed in the opposite side of an image plane 5 relative to the first reflecting surface 12, and a second transmission face 14 disposed closer to the image plane 5 than the second reflecting surface 13. The optical device is characterized in that an optical flux entering the transparent medium L1 passes the first transmission face 1, the first reflecting face 12, the second reflecting face 13 and the second transmission face 14 in the order of tracing a normal light and outgoes to the side of image plane 5, wherein the optical path A consists of one side alone relative to the central axis 2.
COPYRIGHT: (C)2009,JPO&INPIT
- 来源网站：
- 中国工程科技知识中心
