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Technical Data
| CR39 1.499 Semi Finished Lens | ||||||||
| Material: 1.499 Index Resin(Ne=1.50, Abbe value=58, Specific gravity=1.32 ) | ||||||||
Diameter (mm) | Nominal Curve | Front Radius | T.C | Back Radius | BACK T.C | CT/ET | Frong sag Ring (50mm) | RX Range Recommended |
| ɸ70 | 100B | 1921.45 | 0.28 | 87.43 | 6.06 | 8.3/15.5 | 0.16 | -7.25Dto-10.00D |
| ɸ70 | 200B | 265.36 | 2.00 | 102.68 | 5.16 | 8.3/12.0 | 1.18 | -5.25Dto-7.00D |
| ɸ70 | 400B | 130.23 | 4.07 | 102.68 | 5.16 | 9.7/11.0 | 2.42 | +2.00Dto-5.00 |
| ɸ70 | 500B | 105.56 | 5.02 | 139.54 | 3.80 | 8.0/6.5 | 3.00 | +3.00Dto-3.00 |
| ɸ70 | 600B | 87.37 | 6.07 | 139.54 | 3.80 | 10.2/7.8 | 3.65 | 0.00Dto+4.00D |
| ɸ70 | 700B | 76.02 | 6.97 | 139.54 | 3.80 | 10.0/6.0 | 4.23 | +2.00Dto+5.00D |
| ɸ70 | 800B | 64.79 | 8.18 | 90.92 | 5.83 | 9.5/6.8 | 5.02 | +4.25Dto+6.00D |
| ɸ70 | 900B | 57.12 | 9.28 | 87.25 | 6.07 | 10.7/6.0 | 5.76 | +6.25Dto+8.00D |
| ɸ70 | 1000B | 51.74 | 10.24 | 87.25 | 6.07 | 13.5/7.2 | 6.44 | +8.25Dto+10.00D |
| ɸ70 | 1200B | 43.38 | 12.22 | 87.25 | 6.07 | 15.0/5.0 | 7.93 | +10.00Dto+12.00D |
Product Features
Semi Finished Lens:
What's semi-finished lens for?
The semi-finished lens is based on the patient's prescription to create the most personalized RX lens of the original blank. Different prescription power in the requirement of different semi-finished lens type or base curve.
What's the importance of a good semi-finished lens to RX production?
a. High qualified rate in power accuracy and stability
b. High qualified rate in cosmetics quality
c. High optical features
d. Good tinting effects and hard-coating/AR coating results
e. Realize the maximum production capacity
f. Punctual delivery
Not just superficial quality, semi-finished lenses are more focus on the internal quality, such as precise and stable parameters, especially for the popular freeform lens.
CR39 Features:
1). The highest impact resistance among other index lenses
2). The most easily tinted than other index lenses, such as 1.56, 1.61, 1.67, 1.74 and 1.59 pc.
3). The highest transmittance as compared with middle index lenses and high index lenses.
4). The highest ABBE value(57) providing the most comfortable visual experience than other index lenses.
5). The most reliable and consistent lens product physically and optically.
Coating Choice
 | Hard Coating is also named anti-scratch coating, can protect uncoated lenses from impact and scratch resistance. |
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