Title:
Shooting lens and imaging device with it
Document Type and Number:
Japanese Patent JP6325772
Kind Code:
B2
Abstract:
Provided is an image pickup apparatus including, in order from an object side: a first lens unit; a stop; a second lens unit having a positive refractive power; and an image pickup element. The second lens unit includes a second lens sub-unit including only at least one positive lens. A refractive index (N2a) at a d-line of every lens included in the second lens sub-unit, an Abbe constant (ν2a) and a partial dispersion ratio (θ2a) of the every lens, a temperature-related relative refractive index change (dn2a/dTrelative) at the d-line, a focal length (f) of the overall system, a focal length (f2a) of the second lens sub-unit, an overall length (TD) of an image pickup lens, and a distance (BF) from an image-side surface of a lens arranged closest to an image side in the image pickup lens to an image plane of the image pickup element satisfy predetermined relationships.
Inventors:
Wakazono Tsuyoshi
Kikuchi Shohei
Kikuchi Shohei
Application Number:
JP2013072746A
Publication Date:
May 16, 2018
Filing Date:
March 29, 2013
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B13/04; G02B13/18
Domestic Patent References:
| JP2011048232A | ||||
| JP2013015621A | ||||
| JP2010176098A | ||||
| JP2010176099A | ||||
| JP2012118097A | ||||
| JP2013182022A | ||||
| JP2010210883A | ||||
| JP2010217506A | ||||
| JP2011027858A | ||||
| JP2010164839A | ||||
| JP2004198855A | ||||
| JP2012098365A |
Attorney, Agent or Firm:
Okabe
Takao Ochi
Koji Yoshizawa
Masami Saito
Takao Ochi
Koji Yoshizawa
Masami Saito