US 12,169,154 B2
Optical apparatus evaluating method
Kunihiko Sasaki, Tochigi (JP); and Yasuhiro Hatakeyama, Tochigi (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 29, 2021, as Appl. No. 17/215,848.
Claims priority of application No. 2020-068987 (JP), filed on Apr. 7, 2020.
Prior Publication US 2021/0314480 A1, Oct. 7, 2021
Int. Cl. H04N 5/232 (2006.01); G01M 11/02 (2006.01); H04N 23/63 (2023.01)
CPC G01M 11/0257 (2013.01) [H04N 23/63 (2023.01)] 10 Claims
OG exemplary drawing
 
1. A lens apparatus evaluating method comprising the steps of:
acquiring first data on a performance of the lens apparatus, which changes along with use of the lens apparatus, the first data including an aberration of the lens apparatus after use of the lens apparatus;
acquiring second data on a first reference performance of the lens apparatus, the second data including an initial aberration of the lens apparatus before use of the lens apparatus;
acquiring third data on a design performance of the lens apparatus, the third data including predefined reference aberration of the lens apparatus as designed; and
determining a deterioration degree of the performance of the lens apparatus using the first data, the second data, and the third data.