Title:
APERTURE DEVICE, LENS UNIT, IMAGING APPARATUS, AND MANUFACTURING METHOD OF LENS UNIT
Document Type and Number:
Japanese Patent JP2021113894
Kind Code:
A
Abstract:
To provide aperture device advantageous in terms of, for example, caliber accuracy and manufacturing cost.SOLUTION: The aperture device includes: an aperture for adjusting the amount of light; a drive unit that drives the aperture; a controlling unit that controls the drive unit; and a storage unit that stores instruction values corresponds to multiple aperture values from the controlling unit to the drive unit. The instruction value is a value that is obtained based on a difference between a diameter obtained by interpolation from the measured diameter for each first drive interval and a measured diameter for each second drive interval that is smaller than the first drive interval.SELECTED DRAWING: Figure 3
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Inventors:
NAKAGAMI HIDEOMI
Application Number:
JP2020006278A
Publication Date:
August 05, 2021
Filing Date:
January 17, 2020
Export Citation:
Assignee:
CANON KK
International Classes:
G03B9/02; G03B7/091
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsushi Mizumoto
Hirayama Tomoya
Atsushi Mizumoto
Hirayama Tomoya