Title:
投写光学系及びプロジェクター
Document Type and Number:
Japanese Patent JP6558093
Kind Code:
B2
Abstract:
A feeding mechanism is used to adjust the distance between a reduction side lens group and an object plane for back focus adjustment. A rotation angle adjustment mechanism capable of rotating action independent of rotating action performed in the back focus adjustment is used to adjust the rotation angle by which at least part of the reduction side lens group is rotated.
Inventors:
Naoto Takehana
Application Number:
JP2015124488A
Publication Date:
August 14, 2019
Filing Date:
June 22, 2015
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
G02B17/08; G02B7/02; G02B19/00; G03B21/00; G03B21/14
Domestic Patent References:
| JP2010250200A | ||||
| JP2007025579A | ||||
| JP2000075182A | ||||
| JP2003161868A | ||||
| JP2012014113A | ||||
| JP2012042542A | ||||
| JP2006047986A |
Foreign References:
| US20040207931 | ||||
| WO2014174600A1 | ||||
| US20100103540 |
Attorney, Agent or Firm:
Kazuaki Watanabe
Mitsuhiro Isobe
Satoshi Nakai
Hiroki Matsuoka
Mitsuhiro Isobe
Satoshi Nakai
Hiroki Matsuoka