Reflective screen, display device, and mobile apparatus

Details Reflective screen, display device, and mobile apparatus Reflective screen, display device, and mobile apparatus

2009-03-19

2011-12-20

LaBalle, Clayton E (Department: 2862)

Optical: systems and elements

Diffraction

From grating

Reexamination Certificate

active

08081382

ABSTRACT:
A reflective screen includes: a substrate having a first refractive index; and a periodic structure provided on a major surface of the substrate and including a periodic film which has a period Λ and is made of a material having a second refractive index that is higher than the first refractive index. The period Λ is not less than 400/(N+1) nm and not more than 680/(N−1) nm, where N is an equivalent refractive index of the periodic film.

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