Danyang Lens Optics Technology Co.,Ltd.

Add: Glasses Industrial Park,Situ town,Danyang City,Jiangsu,China

Tel: +86-511-86879826

Fax: +86-511-86879738

Mail:dylot@dylot.cn

tiffanyjing@dylot.cn

Website: www.dylot.cn

Finished single vision 1.49 bifocal flat top

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1.49 Flat-Top

Announcer: Danyang Lens Optics Technology Co.,Ltd. Release time: 2017-2-11 21:06:17 Hits: 385 Close

Specification for CR39 Base curve & CT/ET.
Product : Finished Index 1.49 Bifocal Flat Top
Material Property
Index : 1.49
Material : Allyl Di-glycol Carbonate (ADC)
Density : 1.31
Abbe Value: 58
Lens Technical Data
Add Power: +1.00~+3.00 Steps in 0.25 steps
Finished Lens Technical Data
Lens Diameter : 70/28mm

Nominal Basecurve	upper power range	Dia (mm)	Actual Convex Diopter	Concave Diopter	Convex Curve Radius (mm)	Concave Curve Radius (mm	CT (mm)	ET (mm)


4.00	-2.00	70	4.00	6.25	130.75	83.680	1.7
	-1.75			6.00		87.170
	-1.50			5.75		90.950
	-1.25			5.50		95.950
	-1.00			5.25		99.620	1.9
	-0.75			5.00		104.600
	-0.50			4.75		110.100
	-0.25			4.50		116.220
5.00	0.00		4.90	4.93	106.76	106.180		1.9
	0.25			4.64		112.620
	0.50			4.39		119.190
	0.75			4.05		128.980		1.6
	1.00			3.77		138.650
	1.25			3.51		148.820		1.1
	1.50			3.23		161.910
	1.75			2.92		179.130
	2.00			2.63		198.520
	2.25			2.37		220.230
	2.50			2.10		248.850
	2.75			1.83		286.060
	3.00			1.57		333.630

Lens Layout