CIRCULARLY POLARIZED LIGHT SEPARATION FILM AND PRODUCTION METHOD OF CIRCULARLY POLARIZED LIGHT SEPARATION FILM, AND INFRARED RAY SENSOR

摘要

PROBLEM TO BE SOLVED: To provide a film that has high sensitivity and can be used to reduce erroneous detection regardless of ambient environment in a detection system using polarized light in an infrared wavelength region.SOLUTION: A circularly polarized light separation film is provided, which selectively transmits either right-handed circularly polarized light or left-handed circularly polarized light in at least a part of a near infrared wavelength region. The circularly polarized light separation film comprises: a visible light reflection layer that reflects light in at least a part of a visible light wavelength region; and a circularly polarized light separation layer that selectively transmits either right-handed polarized light or left-handed polarized light in at least a part of the near infrared wavelength region.SELECTED DRAWING: None