Impact resistant Fresnel lens

Details Impact resistant Fresnel lens Impact resistant Fresnel lens

1994-07-19

1995-12-19

Clark, W. Robinson

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525242, 525302, 525308, 525309, 359742, C08L 3308, C08L 3310, C08L 2510, C08L 2514

Patent

active

054769060

ABSTRACT:
The present invention provides an impact resistant Fresnel lens comprising a resin which is obtained by polymerizing a solution consisting essentially of (a) 100 parts by weight of a monomer mixture comprising an styrenic monomer in an amount of from 60 to 99 parts by weight and a (meth)acrylic monomer of from 1 to 40 parts by weight, and (b) 1 to 50 parts by weight of a styrene-dienic copolymer based on 100 parts by weight of said monomer mixture based on 100 parts by weight of said monomer mixture. The Fresnel lens has a high refractive index and excellent transparency and impact resistance.

REFERENCES:
patent: 5071236 (1991-12-01), Sudo et al.

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