US 11,656,456 B2
Optical element and optical apparatus
Toshiki Nakamura, Tokyo (JP); Masaru Eguchi, Saitama (JP); Yutaka Takakubo, Saitama (JP); Yoshitake Tanno, Tokyo (JP); and Naomi Matsumoto, Tokyo (JP)
Assigned to HOYA CORPORATION, Tokyo (JP)
Filed by HOYA CORPORATION, Tokyo (JP)
Filed on Aug. 12, 2020, as Appl. No. 16/991,411.
Claims priority of application No. JP2019-149299 (JP), filed on Aug. 16, 2019.
Prior Publication US 2021/0048665 A1, Feb. 18, 2021
Int. Cl. G02B 27/00 (2006.01); G02B 5/00 (2006.01); G02B 1/11 (2015.01)
CPC G02B 27/0018 (2013.01) [G02B 1/11 (2013.01); G02B 5/003 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An optical element including a glass body, the optical element comprising:
a colored layer provided inside the glass body and positioned outside an effective aperture of the optical element,
wherein coloring of the colored layer is a reduction pigment occurring in a glass component of the glass body.