Title:
光学系およびそれを有する撮像装置
Document Type and Number:
Japanese Patent JP7166980
Kind Code:
B2
Abstract:
An optical system includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, an intermediate unit including one or more lens units, and a final lens unit having a negative refractive power. The second lens unit is moved toward an image plane, and a lens unit closest to the image plane in the one or more lens units included in the intermediate unit is moved toward the object in focusing from infinity to a short distance. The second lens unit satisfies a predetermined inequality.
More Like This:
| JP2015060005 | IMAGE READING LENS, IMAGE READING DEVICE, AND IMAGE FORMING APPARATUS |
| WO/2001/006299 | COMPOUND LENS ARRANGEMENT FOR USE IN LENS ARRAYS |
| JP6588665 | Imaging optical lens |
Inventors:
Shinya Okuoka
Application Number:
JP2019076160A
Publication Date:
November 08, 2022
Filing Date:
April 12, 2019
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B13/00
Domestic Patent References:
| JP2018141888A | ||||
| JP2011118379A | ||||
| JP2011013357A | ||||
| JP2001033704A | ||||
| JP2006153942A | ||||
| JP2008257200A | ||||
| JP2018132674A | ||||
| JP2017173409A | ||||
| JP2014142601A | ||||
| JP2010145830A | ||||
| JP2010181634A |
Foreign References:
| WO2019187633A1 |
Attorney, Agent or Firm:
Takuma Abe
Sougo Kuroiwa
Sougo Kuroiwa