Why plastic aspheric lenses?

Edmund Optics® TECHSPEC® Plastic Aspheric Lenses and TECHSPEC® Plastic Hybrid Aspheric Lenses are both manufactured utilizing Zeon Chemical’s Zeonex E48R material. Zeonex materials feature high transparency, low fluorescence, low birefringence, low water absorption, and high heat and chemical resistance, making it a superior material vs. other commonly available plastics. Zeonex is a Cylco Olefin Polymer (COP) material.

Plastic Materials Selection Guide
Property	Glass	Zeonex E48R	PMMA	Polycarbonate	Polystyrene
Transmission	Excellent	Excellent	Excellent	Good	Very Good
Low Refractive Index	Excellent	Excellent	Excellent	Poor	Poor
Birefringence	Excellent	Excellent	Excellent	Poor	Poor
Water Absorption	Excellent	Excellent	Poor	Good	Excellent
Impact Resistance	Poor	Good	Good	Excellent	Good
Moldability	Fair	Excellent	Good	Excellent	Excellent
Heat Resistance	Excellent	Good	Poor	Good	Poor
Coating Adhesion	Excellent	Good	Fair	Fair	Fair

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