5236000582

Table,5. Selected plastic optical materiał characterisńcs

Materials	rype	[Chemical Structure		chaiacteristics	Issues	Applications
PMMA	Acrylate Polymers	CM, CM, “ C- CH, J		. high transparent . Iow birefringaice . outstanding hardness . high light detericration resistance . highĄJ&gnumber	. high water absorption . changeofrefractive index due to absorption . heat resistance	condensers feMlmses car lamps lenses light guide plates for LCD backlights
Afeschc Acrylate	Aęrslate Polymers	« i r ch, P “		. tow birefringence . tow water absorption . high heat resistance	. Water absorption is reduced, being apprcerimarely half of thatofPMMA	cptical lenses CD pick-up ^enses LBP lenses
Optical Pohcarbonate (PC)	Polycar- feaaaie.	■•OtOt		. most eommonly used . tow levels of impurities . transparenty . high refractive index . heat resistance • SłSlitefeiM transferability . JjigJj intensity.	. large birefringence coefficient is approximately 10 times greater than that of PMMA.	CD-ROM CD-RRW. MD, DVD-ROM, DVD-Video, and DVD-RRW
cydootefm Polymer (CÓP)	Polycar- bgrtątg	^11 k		. Transparent . The lowest water absorption . Low scattering . Low birefringence . Heat resistance ■ High		cptical derices sućh as lasers used for the visible region cptical discs light guide plates for -CD backlights
Cycloolefin Copolymer (COC)	EstesŁ 2SBMŁ	-fy-tr-j-		. low specific granty . transparency . low water absorption . low scattering . low birefringence . heat resistance		DVD pick-up laises Celi phone camera enses Optical lenses
Eatesfe (PSU)	forool-o}.			. Heat resistance. The heat deflection temperaturę is3.43F . High refractive index (>1.5). . High intensity		food service components pluinbingfixtures membranes laboratory animal cages

From HondBookofPlazńc Opńcz