Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
IMAGE CAPTURING LENS SYSTEM
Document Type and Number:
Japanese Patent JP2017015967
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an image capturing lens system which offers a view angle of no less than 170 degrees, compactness, and good correction for various aberrations including coma aberration, field curvature, axial chromatic aberration, and magnification chromatic aberration.SOLUTION: An image capturing lens system is characterized in that; the system comprises a first lens group having positive refractive power, aperture stop, and second lens group arranged in order from the object side; the first lens group comprises a 1a lens group comprising two or more negative lenses and having negative refractive power, and a 1b lens group comprising two or more positive lenses and having positive refractive power, arranged in order from the object side; and the system satisfies the following conditional expressions (1), (2): 0.8

Inventors:
USUI AKITOSHI
Application Number:
JP2015133448A
Publication Date:
January 19, 2017
Filing Date:
July 02, 2015
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HOYA CORP
International Classes:
G02B13/18; G02B13/04
Foreign References:
WO2014103200A12014-07-03
Attorney, Agent or Firm:
Kunio Miura
Kuniyo Miura



 
Previous Patent: Light equipment and a projector

Next Patent: Image forming device