Patent ID: 11892627
Assignee: FUJIFILM CORPORATION
Field: Optics (Instruments)
Classification: CPC G  B | IPC B  G

Claim 0:
1. A projection image display member comprising, in the following order:
at least one phase difference layer;
at least one or more selective reflection layers; and
at least one polarization conversion layer,
wherein the polarization conversion layer is a layer in which a helical alignment structure of a liquid crystal compound is fixed,
the number of pitches x of the helical alignment structure and a film thickness y (unit of μm) of the polarization conversion layer satisfy all of the following Relational Expressions,

0.3≤x≤7.0,  (i)

0.5≤y≤6.0,  (ii)

y≤0.7x+3.2,  (iii)

and

y≥0.7x−1.4.  (iv)