Title:
自動焦点検出装置
Document Type and Number:
Japanese Patent JP5846245
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain an autofocus detection device that enables oblique line detection accuracy to be improved at low costs and with a simple configuration.SOLUTION: An autofocus detection device pupil-dividing a ray of subject light, and projecting a pair of subject images on a different line sensor of a detection area, and obtaining an amount of defocus from a phase difference between a pair of the projected subject images comprises; a parallel line sensor that is composed of a pair of lateral line sensors for a vertical line detection arranged in a lateral direction and a pair of vertical line sensors for a lateral line direction arranged in a vertical direction, in which each makes two pixel columns adjacent in parallel; determination means that determines a degree of an influence of an edge angle of the subject image calculated from a phase difference in output waveforms of two pixel columns of the parallel line sensor; selection means that selects an output of the pair of line sensors for use in a defocus computation according to the determined edge angle; and computation means that computes the amount of defocus on the basis of the selected output of the sensor.
Inventors:
Moriyasu Kanai
Application Number:
JP2014101961A
Publication Date:
January 20, 2016
Filing Date:
May 16, 2014
Export Citation:
Assignee:
Ricoh Imaging Co., Ltd.
International Classes:
G02B7/34; G03B13/36; H04N5/232
Domestic Patent References:
| JP7159683A | ||||
| JP2001208962A | ||||
| JP2006071741A | ||||
| JP2006106429A | ||||
| JP8334681A | ||||
| JP8247758A | ||||
| JP4027814A | ||||
| JP2000206403A | ||||
| JP2003344754A | ||||
| JP2002341232A | ||||
| JP11084222A |
Attorney, Agent or Firm:
Kunio Miura
Kuniyo Miura
Kuniyo Miura