发明名称 |
Image-forming lens, and imaging apparatus and information device using the image-forming lens |
摘要 |
An image-forming lens consists of: from an object side to an image side in the following order, a first lens group with a positive refractive power; an aperture stop; and a second lens group with a positive refractive power, and the second lens group includes: from the object side to the image side in the following order, a second F lens group with a positive refractive power in which a biconvex lens and a biconcave lens are cemented to each other; a second M lens group having a concave shape on a surface on a most object side and a convex shape on a surface on a most image side; and a second R lens group of a positive lens.
|
申请公布号 |
US8587878(B2) |
申请公布日期 |
2013.11.19 |
申请号 |
US201313803112 |
申请日期 |
2013.03.14 |
申请人 |
OHASHI KAZUYASU;KUBOTA TAKASHI;RICOH COMPANY, LTD. |
发明人 |
OHASHI KAZUYASU;KUBOTA TAKASHI |
分类号 |
G02B13/04 |
主分类号 |
G02B13/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|