Non-birefringent optical resin material and optical member

Details Non-birefringent optical resin material and optical member Non-birefringent optical resin material and optical member

2006-04-18

2010-11-30

Yoon, Tae H (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C526S245000, C526S937000, C349S120000, C385S141000

Reexamination Certificate

active

07842740

ABSTRACT:
Provided are an optical resin and an optical member using the same, both orientation birefringence and photoelasticity birefringence of the optical material being deadened and generally eliminated. The optical material consists of a composite constituent system of three or more constituents including a copolymerization system of monomer-element number not smaller than two, combination and constituent ratio of the composite constituent system being set so that both orientation birefringence and photoelasticity birefringence of the optical material are deadened at the same time and 5.0×10−5or less is given under a condition that principal chains of the copolymerization system have degree of orientation equal to 0.03, and further a photoelasticity constant not greater than 1.0×10−12(Pa−1) is obtained. The composite constituent system may contain an additive containing a low molecular weight compound which has an anisotropic polarizability and can be orientated in a polymer. The composite constituent system may consist of a copolymerization system of monomer-element number not smaller than three. Optical members produced by applying molding to the optical hardly show birefringence if external force is applied.

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International Preliminary Report on Patentability issued in corresponding International Patent Application No. PCT/JP2006/308152, mailed on Nov. 8, 2007.
Shuichi Iwata et al., “Transparent zero-birefringence copolymer and its optical properties”, Applied Optics, vol. 36, No. 19, Jul. 1, 1997; pp. 4549-4555.
H. Ohkita et al., “Compensation of the photoelastic birefringence of a polymer by doping with an anisotropic molecule”, Applied Physics A.81, (2005); pp. 617-620.
Akihiro Tagaya et al., “Anisotropic Molecule Dopant Method for Synthesizing a Zero-Birefringent Polymer”, Japanese Journal of Applied Physics, vol. 40, Part 1, No. 10, Oct. 2001; pp. 6117-6123.
Shuichi Iwata et al., “Compensation for Birefringence of Oriented Polymers by Random Copolymerization Method”, Japanese Journal of Applied Physics, vol. 35, Part 1, No. 7, Jul. 1996; pp. 3896-3901.
Hisanori Ohkita et al., “Compensation of Photoelastic Birefringence of Polymers by Anisotropic Molecules and Analysis of Compensation Mechanism”, Japanese Journal of Applied Physics, vol. 44, No. 6A, 2005; pp. 3975-3982.
Akihiro Tagaya et al., “Zero-birefringence polymer by the anisotropic molecule dope method”, Applied Optics, vol. 40, No. 22, Aug. 1, 2001; pp. 3677-3683.
English language version of the International Search Report (PCT/ISA/210) mailed on Jul. 25, 2006 for the International Application PCT/JP2006/308152.

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