- Mineral Glass 1.523 & 1.700 Ophthalmic Lenses
 Quality Standard:- 1. The tolerance limits:
- A) SPHERICAL POWERS + AND -
- tolerance
limits
-
sphero astigmatic
- from 0.00 to 6.00
+/-0.03
- from 6.25 to
12.00 +/-0.06 +/-0.06
- over
12.00
+/-0.09
- B) TORIC POWERS + AND -
- tolerance
limits of cylinder powers
- from
0.25 to 2.00
- from 0.00 to
6.00 +/-0.03
- from 6.25 to
12.00
+/-0.06
- over 12.00 +/-0.09
- 2. The prism tolerance
- 0.00 -- +/-0.50
0.15^
- +/-0.75 --
+/-2.00 <
= 3.0mm
- +/-2.25 --
+/-6.00 <
= 2.0mm
- +/-6.25 --
+/-20.00 <
= 1.5mm
- 3. Cosmetic issues:
- center
(Diameter:30mm) edge
-
| point |
No |
< Diam.0.10mm two |
| line |
No |
width < 0.015mm, length < 10mm two |
- Range
- I. n=1.523
- 0.00 -- +/-6.00
- 0.00 -- +/-6.00/+/-0.25 -- +/-2.00
- Color: White or Pink
- Diameter: 60mm, 65mm or 70mm
- II. n=1.700
- -3.00 -- -20.00
- -2.00 -- -14.00/-0.25 -- -2.00
- -2.00 -- -8.00/-0.25 -- -4.00
- Color: White or Pink
- Diameter: 65mm or 70mm
- * We also have other mineral glass
products such as lenses index 1.600, photochrometic lenses, sunglasses lenses and high qualified blanks.
|
Mineral Glass
Lenses
