光学元件

（照相机透镜，非球面镜片，棱镜，镜子，f - the ta镜头，摄像镜头）
 透明度高，吸水率低，低双折射率，高耐热性，优越性

Property	Unit	Measu rement method	Condi tions	480	480R	E48R	F52R	330R
Specific gravity	–	ASTM D792	–	1.01	1.01	1.01	1.02	0.95
Water absorption	%	ASTM D570	–	<0.01	<0.01	<0.01	<0.01	<0.01
Light transmittance	%	ASTM D1003	Thickness: 3 mm	92	92	92	92	92
Refractive index	–	ASTM D542	–	1.525	1.525	1.531	1.535	1.509
Glass transition temperature	°C	JIS K7121	–	138	138	139	156	123
Heat distortion temperature	°C	ASTM D648	1.80MPa No anneal	123	123	122	144	103
Linear expansion coefficient	cm/cm°C	ASTM E831	–	7 × 10-5	7 × 10-5	6 × 10-5	6 × 10-5	7 × 10-5
MFR	g/10min	ISO1133	280°C 21.18N	20	21	25	22	–
			260°C 21.18N	–	–	–	–	15
Flexural modulus	MPa	ISO178	–	2100	2100	2500	2400	3100
Flexural strength	MPa	ISO178	–	94	94	104	109	91
Tensile modulus	MPa	ISO527	–	2200	2200	2500	3000	–
Tensile strength	MPa	ISO527	–	59	59	71	45	45
Tensile elongation	%	ISO527	–	40	40	10	2	3
Izod impact strength	J/m	ASTM D256	3.2mm with notch	24	24	21	19	13
Pencil hardness	–	JIS K5401	–	H	H	H	F	3H
Volume resistivity	Ωcm	IEC93	–	>1016	>1016	>1016	>1016	>1016
Dielectric breakdown strength	kV/mm	ASTM D149	Short-time method, 1mm	40	40	40	60	40
Dielectric constant	–	IEC250	1MHz	2.3	2.3	2.3	2.5	2.3
Dielectric loss tangent	–	IEC250	1MHz	0.0002	0.0002	0.0002	0.0007	0.0004
Flammability	–	UL Standards	–	94HB	94HB	94HB	94HB	94HB
Major applications	–	–	–	Medical equipment and optical compo nents	Lenses and optical compo nents	Lenses and optical compo nents	Lenses and optical compo nents	Lenses and optical compo nents

 Data represents experimental results and does not guarantee specific performance levels under actual usage.