Title:
OPTICAL DEVICE
Document Type and Number:
Japanese Patent JP2014235199
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an optical device capable of limiting a focus drive range to a screen surface for preventing AF malfunction in a certain range from the screen surface in 3D operation imaging.SOLUTION: A three-dimensional imaging optical device for imaging a subject by first and second optical systems with an angle of convergence comprises: reference position setting means for calculating object distance to the screen surface where optical axes of the first and second optical systems intersect; and focus operation limiting means for applying limitation of focus operation to the first and second optical systems on a long distance side and a short distance side of the object distance calculated by the reference position setting means.
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Inventors:
NAGATA KATSUHIKO
Application Number:
JP2013114760A
Publication Date:
December 15, 2014
Filing Date:
May 31, 2013
Export Citation:
Assignee:
CANON KK
International Classes:
G02B7/34; G02B7/28; G03B13/36; G03B35/08; H04N5/225; H04N5/232; H04N13/02
Attorney, Agent or Firm:
Yukio Takanashi