公开(公告)号：US20220019022A1

公开(公告)日：2022-01-20

申请号：US17488391

申请日：2021-09-29

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： AKIRA HASHIYA ,  YASUHISA INADA ,  MASANORI ERA

IPC: G02B6/124 ,  G01S7/481

Abstract: An optical device includes a first mirror having a first reflecting surface and extending along a first direction, a second mirror having a second reflecting surface that faces the first reflecting surface and extending along the first direction, and an optical waveguide layer, located between the first mirror and the second mirror, that causes light to propagate along the first direction. A transmittance of the first mirror is higher than a transmittance of the second mirror. A reflection spectrum of at least either the first mirror or the second mirror with respect to light arriving from a direction normal to the reflecting surface includes, in a wavelength region in which a reflectance is higher than or equal to 90%, a local maximum point and first and second points of inflection located closer to a long-wavelength side than the local maximum point.