Laminated wave plate and optical pickup device using the same

Details Laminated wave plate and optical pickup device using the same Laminated wave plate and optical pickup device using the same

2011-07-26

2011-07-26

Dinh, Tan X (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

Reexamination Certificate

active

07986608

ABSTRACT:
A laminated wave plate of the present invention includes a first wave plate having a phase difference of Γ1and a second wave plate having a phase difference of Γ2with respect to a wavelength λ, the first wave plate and the second wave plate being bonded together so that an optical axis of the first wave plate and an optical axis of the second wave plate intersect each other to function as a quarter-wave plate as a whole, the laminated wave plate comprising following equations from (1) to (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−cos ΔΓ2)/{2×(1−cos Δθ1)}. . . (5); and θ2=45°±5°. . . (6), wherein θ1is an optic axis orientation of the first wave plate, θ2is an optic axis orientation of the second wave plate, and each of λ11≦λ≦λ12, n1, and n2is a natural number starting from 1.

REFERENCES:
patent: 6268962 (2001-07-01), Reeder
patent: 2005/0062916 (2005-03-01), Matsumoto et al.
patent: 2005/0180296 (2005-08-01), Ooto
patent: A 10-068816 (1998-03-01), None
patent: WO 03/091768 (2003-11-01), None

Affiliated with

Also associated with

Rating

Laminated wave plate and optical pickup device using the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Laminated wave plate and optical pickup device using the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laminated wave plate and optical pickup device using the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2625861