Title:
結像光学系、撮像装置、画像読み取り装置および投射型画像表示装置
Document Type and Number:
Japanese Patent JP4478408
Kind Code:
B2
Abstract:
A compact image-forming optical system is disclosed which has a high optical performance due to arranging a reflective optical unit and a refractive optical unit at suitable positions. The image-forming optical system is an optical system performing image formation from a magnifying side to a demagnifying side or from the demagnifying side to the magnifying side, and includes, in order from the magnifying side to the demagnifying side, a refractive optical unit having a positive optical power as a whole, and a reflective optical unit including at least three reflective surfaces. The image-forming optical system has a pupil on the magnifying side further from the reflective surface furthest on the magnifying side the reflective optical unit, and the focal length of the refractive optical unit is set to be within a range of 0.2 to 5 times the focal length of the reflective optical unit.
Inventors:
Toshihiro Sunaga
Hiroshi Hatakeyama
Hiroshi Hatakeyama
Application Number:
JP2003188053A
Publication Date:
June 09, 2010
Filing Date:
June 30, 2003
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B17/08; G02B13/18; G02B27/18
Domestic Patent References:
| JP9146037A | ||||
| JP10260357A | ||||
| JP2001075150A | ||||
| JP2002040361A | ||||
| JP2001201689A | ||||
| JP2002139669A | ||||
| JP2002098915A | ||||
| JP9258105A |
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsushi Mizumoto
Atsushi Mizumoto