Title:
大口径レンズ
Document Type and Number:
Japanese Patent JP5797941
Kind Code:
B2
Inventors:
Yutaka Uemura
Application Number:
JP2011133790A
Publication Date:
October 21, 2015
Filing Date:
June 16, 2011
Export Citation:
Assignee:
Sigma Co., Ltd.
International Classes:
G02B13/00; G02B13/18
Domestic Patent References:
| JP2000284171A | ||||
| JP2011059496A | ||||
| JP2012027349A | ||||
| JP2009244699A |