| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a laminated quarter-wave plate, having bandwidths of a plurality of wavebands which is to become a phase difference of 90° and broadened. <P>SOLUTION: The laminated wave plate includes a first wave plate having a phase difference of Γ1 and a second wave plate having a phase difference of Γ2, with respect to a wavelength λ, the first wave plate and the second wave plate which are bonded together so that an optical axis of the first wave plate and that of the second wave plate intersect with each other to function as a quarter-wave plate as a whole, and the laminated wave plate satisfies equations (1)-(6): Γ1=360×(n1+1) ... (1); Γ2=90×(2×n2+1) ... (2); ΔΓ1=(Γ12a-Γ11a)/(λ12-λ11) ... (3); ΔΓ2=(Γ12b-Γ11b)/(λ12-λ11) ... (4); cos2θ1=1-(1-cosΔΓ2)/2(1-cosΔΓ1) ... (5); and θ2=45°±5° ... (6), wherein θ1 is an optic axis orientation of the first wave plate, θ2 is the optical axis orientation of the second wave plate, and inequality λ11≤λ≤λ12 holds, and each of n1 and n2 is a natural number, starting from 1. <P>COPYRIGHT: (C)2010,JPO&INPIT |
