Title:
OPTICAL FILTER UNIT AND IMAGING APPARATUS
Document Type and Number:
Japanese Patent JP2023127287
Kind Code:
A
Abstract:
To provide an optical filter unit and an imaging apparatus with which the flange back amount does not need to be re-adjusted even when the optical filter unit is replaced for the imaging apparatus.SOLUTION: An optical filter module (optical filter unit) 400 is removably arranged between a mount module 300 and a body part 500. The optical filter module 400 comprises an optical member 420, and an adjustment member 412 that adjusts the distance between the mount module 300 and an image pickup device 521. The adjustment member 412 has a first contact surface 412a in contact with the mount module 300, and a second contact surface 412b in contact with the body part 500. An inter-contact distance t1 between the first contact surface 412a and the second contact surface 412b is the same as an air-converted optical path length obtained based on a thickness tA of the optical member 420 and a refractive index nA of the optical member 420.SELECTED DRAWING: Figure 4
Inventors:
GUNJI MANAMI
Application Number:
JP2022030988A
Publication Date:
September 13, 2023
Filing Date:
March 01, 2022
Export Citation:
Assignee:
CANON KK
International Classes:
G03B11/00; G03B17/14; H04N23/55
Attorney, Agent or Firm:
Betsuyaku Shigehisa