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1. (WO2018120521) OPTICAL FILM AND MANUFACTURING METHOD THEREFOR

Pub. No.:    WO/2018/120521    International Application No.:    PCT/CN2017/080748
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Tue Apr 18 01:59:59 CEST 2017
IPC: G02B 5/26
Applicants: SHENZHEN HOLOKOOK TECHOLOGY CO., LTD.
深圳市光科全息技术有限公司
Inventors: GUO, Bingang
郭滨刚
Title: OPTICAL FILM AND MANUFACTURING METHOD THEREFOR
Abstract:
An optical film and a manufacturing method therefor. The optical film comprises a substrate (10), and dielectric layer (12)s and granular layers (11) alternately arranged on the substrate (10); each granular layer (11) comprises multiple granules (111); a value range of the distance between the granules (111) is from λ1/8 to λ1/2, a value range of the optical thickness of each dielectric layer (12) is from λ2/8 to λ2/2, and the refractive index of the granular layer (11) is greater than or smaller than that of the dielectric layer (12). The optical film can strongly reflect light having one or two center wavelengths, and can implement narrow band filtering without affecting optical waves of other bands.