To obtain high diffraction efficiency by remarkably minimizing the difference of refractive index on the boundary between a polymer dispersed liquid crystal (PDLC) and a glass substrate from before exposure till after exposure to decrease the light reflection intensity.
The polarization selective hologram element is formed by holding a mixture 54 comprising a non-polymerizable liquid crystal having dielectric anisotropy, a polymerizable monomer or prepolymer and a photopolymerization initiator between a pair of substrates 53a, 53b, wherein when the refractive index of ordinary light and extraordinary light of the non-polymerizable liquid crystal having the dielectric anisotropy is expressed respectively by (no) and (ne), the refractive index of the polymerizable monomer or prepolymer is expressed by (n2) and the volume ratio of the non-polymerizable liquid crystal to the polymerizable monomer or prepolymer is expressed by (:(1-)) where 01, the refractive index (n) of the substrate away from the original plate in a pair of the transparent substrates satisfies min (no,ne) n* (2no+ne) /3+ (1-) *n2 (where, min (no,ne) is smaller one of (no) and (n2)) and a periodical phase separation structure of a layer comprising the polymer and a layer comprising the non-polymerizable liquid crystal is formed.
KOBAYASHI MASANORI
SUGIMOTO HIROYUKI
FUNATO HIROYOSHI
| JP2002090538A | 2002-03-27 | |||
| JP2005091940A | 2005-04-07 | |||
| JP2006309174A | 2006-11-09 | |||
| JP2005331849A | 2005-12-02 | |||
| JP2006099012A | 2006-04-13 | |||
| JP2005321674A | 2005-11-17 |
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