Patent ID: 9618834
Date: 2017-04-11
CPC Classifications: B32B,G02B,G03B,Y10T

Claim:
1. A polarization conversion element comprising: first light transmissive substrates and second light transmissive substrates each of which has a light incident surface and a light exiting surface and which are disposed alternately; polarization separation films that are obliquely disposed with respect to the light incident surfaces and separate incident light into two types of linearly polarized light; reflection films that are disposed in parallel to the polarization separation films and reflect one of the two types of linearly polarized light separated by the polarization separation films; and retardation plates that convert one of the two types of linearly polarized light separated by the polarization separation films, wherein each of the polarization separation films is formed on a first surface of the corresponding first light transmissive substrate, each of the reflection films is formed on a second surface of each of the first light transmissive substrates, an adhesive layer is formed on a first surface of each of the second light transmissive substrates, and the plasma polymerization film is formed on a second surface of each of the second light transmissive substrates.