Title:
結像光学系、光学機器および画像投射装置
Document Type and Number:
Japanese Patent JP6736366
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an image formation optical system that has a refraction optical system and a reflection optical system (convex mirror) and that has the reflection optical system reduced in diameter and also has various aberrations excellently corrected.SOLUTION: An image formation system forms an image, which is on one of an enlargement-side conjugate surface and a reduction-side conjugate surface, on the other conjugate surface. The image formation optical system has a refraction optical system L and a reflection optical system M arranged in order from the reduction-side conjugate surface to the enlargement-side conjugate surface, and while the refraction optical system forms an intermediate image at an intermediate image formation position MM in the refraction optical system, the reflection optical system comprises a convex mirror provided most on the side of the enlargement conjugate surface. A condition of 0.01≤|fL/fM|≤0.50 is met, where fL is a focal length of the refraction optical system and fM is a focal length of the reflection optical system.SELECTED DRAWING: Figure 1
Inventors:
Takashi Oide
Kazuhiro Inoko
Kazuhiro Inoko
Application Number:
JP2016117815A
Publication Date:
August 05, 2020
Filing Date:
June 14, 2016
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B17/08; G02B13/18; G03B21/14
Domestic Patent References:
| JP200691867A | ||||
| JP2010244017A | ||||
| JP2013242594A | ||||
| JP2012108267A | ||||
| JP201329787A |
Foreign References:
| US20060203362 | ||||
| DE102013003551A1 |
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsushi Mizumoto
Hirayama Tomoya
Atsushi Mizumoto
Hirayama Tomoya