	US 12,235,471 B2
	Optical body, lighting device, and image display device
Mitsuo Arima, Tokyo (JP); and Kazuki Hoshi, Tokyo (JP)
Assigned to DEXERIALS CORPORATION, Tokyo (JP)
Appl. No. 17/274,598
Filed by DEXERIALS CORPORATION, Tokyo (JP)
PCT Filed Sep. 19, 2019, PCT No. PCT/JP2019/036662 § 371(c)(1), (2) Date Mar. 9, 2021, PCT Pub. No. WO2020/059771, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 2018-177764 (JP), filed on Sep. 21, 2018.
Prior Publication US 2021/0271004 A1, Sep. 2, 2021
Int. Cl. G02B 3/00 (2006.01); G02B 27/09 (2006.01)

CPC G02B 3/0056 (2013.01) [G02B 27/0961 (2013.01)]

8 Claims

1. An optical body in which a composite structure of main structural bodies is deployed continuously within a plane of a base material, wherein

phase distributions of the main structural bodies within the plane of the base material are equivalent to amplitude distributions each obtained by subjecting a pupil function of a two-dimensional optical aperture to Fourier transform, and

a peak ratio value is less than or equal to 2.5,

wherein the peak ratio value is a ratio between a peak level and a base level of a light luminance profile, and

wherein the main structural bodies each have an in-plane existence probability P, an existence region T, a cycle Λ, and a cycle perturbation δ that satisfy Conditions:

P≥0.2%, Λ≥3 μm, T≥10Λ, and δ≥30% (Condition 3-1); or

P≥0.2%, Λ≥4 μm, T>10Λ, and δ≥0% (Condition 3-2).