Title:
LENS UNIT, CAMERA SYSTEM, AND DIAPHRAM CONTROL METHOD
Document Type and Number:
Japanese Patent JP2017003760
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a camera system and lens unit in which an exposure change is not unnatural even upon driving a diaphragm.SOLUTION: A lens unit comprises: an imaging lens; a diaphragm; a diaphragm drive mechanism for causing the diaphragm to be opened/closed; a storage unit storing a characteristic of the diaphragm drive mechanism; and a diaphragm drive unit driving the diaphragm drive mechanism. A diaphragm control method of the lens unit includes: reading out the characteristic of the diaphragm drive mechanism on the basis of an aperture value of the diaphragm (S505 and S506); computing a drive velocity of the diaphragm drive mechanism so that an opening/closing operation of the diaphragm makes a velocity of a change in amount of light passing through the diaphragm constant on the basis of the characteristic of the diaphragm drive mechanism (S507); and controlling the diaphragm drive unit on the basis of the computed drive velocity (S508).SELECTED DRAWING: Figure 9
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Inventors:
TAGUCHI YUZURU
Application Number:
JP2015117283A
Publication Date:
January 05, 2017
Filing Date:
June 10, 2015
Export Citation:
Assignee:
OLYMPUS CORP
International Classes:
G03B7/095; G03B9/02; H04N5/238
Domestic Patent References:
| JP2002077720A | 2002-03-15 | |||
| JP2009258481A | 2009-11-05 | |||
| JP2010102085A | 2010-05-06 |
Foreign References:
| US5953062A | 1999-09-14 |
Attorney, Agent or Firm:
Kobayashi discretion
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