Title:
LENS DEVICE
Document Type and Number:
Japanese Patent JP2017097128
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a lens having a field angle correction function that stops a focus movement and a zoom correction movement at the same time and enables a focus operation having no uncomfortable feeling.SOLUTION: A lens device includes: FOCUS position detection means and ZOOM position detection means for detecting positionS of FOCUS and ZOOM; FOCUS movement detection means for detecting a FUCUS movement; field angle correction data for eliminating a filed angle change that occurs during the FOCUS movement; and a ZOOM control determination part for determining a zoom correction control for eliminating the field angle change that occurs during the FOCUS movement, by means of the field angle correction data and a focus position. The ZOOM control determination part can create a first ZOOM control that is determined based on the field angle correction data and a second ZOOM control made from the FOCUS movement detected by the FOCUS movement detection means and the field angle correction data, and performs control by switching between the first ZOOM control and the second ZOOM control.SELECTED DRAWING: Figure 1
Inventors:
NAGATA KATSUHIKO
Application Number:
JP2015228296A
Publication Date:
June 01, 2017
Filing Date:
November 24, 2015
Export Citation:
Assignee:
CANON KK
International Classes:
G02B7/08; G03B3/10; G03B13/32; G03B13/34; H04N5/225; H04N5/232
Attorney, Agent or Firm:
Yukio Takanashi