| TIPS NO: 192 | |
| Revision: C | |
| Date: Sept 1999 |
KODAK Vision 3000 Lens Product Specifications.
Purpose: The following information is intended to provide basic processing information for both the KODAK Single Vision & Flat Top 28 Bifocals. (Based on a 1.530 Tooling index.)
Single Vision & Flat-Top 28 Lenses Characteristics & Dimensions
|
Characteristics |
KODAK Vision 3000 Lens |
| Refractive Index |
1.557 |
| Dispersion Value (Abbe) |
36.0 |
| Density |
1.24 |
| Visible Light |
91% |
| Rear Surface Coating |
Recommended |
| UV Transmission Cutoff |
380 nm |
| Chemical Resistance |
Excellent |
| Machinability |
Excellent |
Blank Size: 75mm
diameter
Base Curves: 0.50, 1.50, 2.50, 3.50, 4.50, 5.50, 6.50, 7.50, 8.50, 9.75
Power range: -10.00 to +9.50
|
Nominal |
Actual |
Radius |
Sphere |
** Aspheric |
** Aspheric |
Concave |
Thickness |
|
|
Base Curve |
Base Curve |
m/m |
50 mm SAG |
35 mm SAG |
60 mm SAG |
Curve |
Edge |
Center |
|
0.50 |
0.54 |
981.481 |
0.32 |
0.18 |
0.57 |
3.00 |
15.7 |
12.6 |
|
1.50 |
1.44 |
368.056 |
0.85 |
0.44 |
1.39 |
3.00 |
15.7 |
13.8 |
|
2.50* |
2.28 |
232.456 |
1.35 |
0.68 |
2.07 |
3.00 |
15.7 |
14.9 |
|
3.50 |
3.51 |
150.997 |
2.08 |
1.02 |
3.04 |
6.00 |
15.6 |
12.2 |
|
4.50 |
4.51 |
117.517 |
2.69 |
1.30 |
3.84 |
6.00 |
15.4 |
13.2 |
|
5.50 |
5.49 |
96.539 |
3.29 |
1.57 |
4.56 |
6.00 |
13.6 |
12.5 |
|
6.50 |
6.49 |
81.664 |
3.92 |
1.86 |
5.41 |
6.00 |
13.8 |
13.9 |
|
7.50 |
7.50 |
70.667 |
4.57 |
2.16 |
6.36 |
6.00 |
11.7 |
13.2 |
|
8.50 |
8.58 |
61.772 |
5.29 |
2.49 |
7.41 |
6.00 |
10.1 |
13.4 |
|
9.75 |
9.56 |
55.439 |
5.96 |
2.78 |
8.34 |
6.00 |
9.9 |
14.7 |
* Available only in Single Vision.
** Aspheric sags are the actual (measured) sag values of the front surface.
These values are used to calculate the edge thickness. Use the Sphere Sag for calculating
back curves.
General: These high index material lenses have a refractive index of 1.557. Standard pads and polish materials used for surfacing CR-39® lenses can be applied to the KODAK Vision 3000 Lenses. If you have questions, please contact Technical Services at 800-759-0075.
Removal/Remarking the Temporary Reference Marks: The KODAK Vision 3000 lens markings may be removed by wiping the surface with alcohol or standard lens mark removing solvents. To remark the Single Vision lens, locate the optical center and mark a fitting cross 2mm directly above it.
Abrasion Resistance Coatings: The front surface has the superior protection of the RLXPlus® non-tintable coating. The uncoated rear surface of the lens provides adequate durability for normal use. The application of a backside coating is an option that can be used if the lens will be worn in a highly abrasive environment. Using a backside coating after surfacing is always recommended when the lens will be Anti-Reflection coated. Either a tintable coating or non-tintable can be used. However, be sure to verify the impact resistance is maintained, particularly when using a non-tintable coating. Please call Technical Services for the latest test results with various back-side coatings.
Tinting and Neutralizing: When using a tintable back-side coating, the tinting performance and compatibility with specific neutralizers is coating dependent. We recommend against tinting prior to using a non-tintable coating. Coating applications can change the color or density of tinted surfaces. Special care must be taken when clamping KODAK Single Vision and Flat-top 28 lenses. The combination of edge pressure and high temperatures will cause warpage. You should position the clamp with only enough pressure to keep the lens from falling out. If the lens does warp during the tinting process, remove the warpage by setting the lens on a flat tray and bake in an oven at 175-200ƒF for 5 minutes.
AR Coating: The compatibility of AR coatings with the back-side coating should be confirmed. This should include impact testing. Using a backside coating after surfacing is always recommended when the lens will be Anti-Reflection coated. Please call Technical Services for the latest test results with various AR coatings.
Computer Calculation of Rx: The easiest and most efficient method to calculate and process values for an Rx is to use an existing computer software package that contains our aspheric KODAK Vision 3000 Series design data. If your software company has not included our data in their package, our Technical Services group will be happy to provide your software vendor with the necessary specifications. Please forward us a contact name and phone number of your software vendor. If you do not have a software system for running KODAK lenses, Signet Armorlite has developed the KODAK Lens Software Calculation Program. This program is available through Signet Armorlite's Technical Services Department.
Semi-Visible Markings: Only the "K" product code is semi-visible on the KODAK Single Vision and Flat-Top 28 Lens. These marks are normally found on the temporal side after edging. They are located 20 mm out and 15 mm below the optical center, or 0-180º line. The semi-visible "K" on the Flat-top is located at the temporal side of the segment.
Thermal Stability: The new KODAK Lens material has a similar level of heat sensitivity as other high index materials. The lens can flex if heated while under pressure. To prevent warpage, avoid heating the lens over 130º F while it is under pressure from frame or clamping. Warpage can cause a plastic lens to fit loose in the frame. If the lens should become warped, heat without pressure and allow the lens to return to its original shape.
Base Curve Selection: We have provided two base curve selection charts. The STANDARD version should be used by labs using 3-axis generators that can process very flat back curves for higher plus powers. The MODIFIED version should be used by labs with generators (Diamond wheel generators) that are limited to a minimum concave curve of 2.75 diopters.
| KODAK VISION 3000 LENS (1.56 HIGH INDEX) - SINGLE VISION & FLAT-TOP ASPHERIC | ||||||||||||||||||||||
| MINUS - BASE CURVE SELECTION | ||||||||||||||||||||||
| Cylinder | ||||||||||||||||||||||
| Sphere Power |
0.00 | -0.25 | -0.50 | -0.75 | -1.00 | -1.25 | -1.50 | -1.75 | -2.00 | -2.25 | -2.50 | -2.75 | -3.00 | -3.25 | -3.50 | -3.75 | -4.00 | -4.25 | -4.50 | -4.75 | -5.00 | |
| 0.00 | ||||||||||||||||||||||
| -0.25 | 4.50 Base | |||||||||||||||||||||
| -0.50 | ||||||||||||||||||||||
| -0.75 | ||||||||||||||||||||||
| -1.00 | ||||||||||||||||||||||
| -1.25 | ||||||||||||||||||||||
| -1.50 | 3.50 Base | |||||||||||||||||||||
| -1.75 | ||||||||||||||||||||||
| -2.00 | ||||||||||||||||||||||
| -2.25 | ||||||||||||||||||||||
| -2.50 | ||||||||||||||||||||||
| -2.75 | ||||||||||||||||||||||
| -3.00 | ||||||||||||||||||||||
| -3.25 | 2.50 Base | |||||||||||||||||||||
| -3.50 | ||||||||||||||||||||||
| -3.75 | ||||||||||||||||||||||
| -4.00 | ||||||||||||||||||||||
| -4.25 | ||||||||||||||||||||||
| -4.50 | ||||||||||||||||||||||
| -4.75 | ||||||||||||||||||||||
| -5.00 | ||||||||||||||||||||||
| -5.25 | ||||||||||||||||||||||
| -5.50 | 1.50 Base | |||||||||||||||||||||
| -5.75 | ||||||||||||||||||||||
| -6.00 | ||||||||||||||||||||||
| -6.25 | ||||||||||||||||||||||
| -6.50 | ||||||||||||||||||||||
| -6.75 | ||||||||||||||||||||||
| -7.00 | ||||||||||||||||||||||
| -7.25 | ||||||||||||||||||||||
| -7.50 | ||||||||||||||||||||||
| -7.75 | ||||||||||||||||||||||
| -8.00 | ||||||||||||||||||||||
| -8.25 | ||||||||||||||||||||||
| -8.50 | ||||||||||||||||||||||
| -8.75 | 0.50 Base | |||||||||||||||||||||
| -9.00 | ||||||||||||||||||||||
| -9.25 | ||||||||||||||||||||||
| -9.50 | ||||||||||||||||||||||
| -9.75 | ||||||||||||||||||||||
| -10.00 | ||||||||||||||||||||||
| KODAK VISION 3000 LENS (1.56 HIGH INDEX) - SINGLE VISION & FLAT-TOP ASPHERIC | ||||||||||||||||||||||
| PLUS - BASE CURVE SELECTION | ||||||||||||||||||||||
| Cylinder | ||||||||||||||||||||||
| Sphere Power |
0.00 | -0.25 | -0.50 | -0.75 | -1.00 | -1.25 | -1.50 | -1.75 | -2.00 | -2.25 | -2.50 | -2.75 | -3.00 | -3.25 | -3.50 | -3.75 | -4.00 | -4.25 | -4.50 | -4.75 | -5.00 | |
| 10.00 | ||||||||||||||||||||||
| 9.75 | ||||||||||||||||||||||
| 9.50 | ||||||||||||||||||||||
| 9.25 | 9.75 Base | |||||||||||||||||||||
| 9.00 | ||||||||||||||||||||||
| 8.75 | ||||||||||||||||||||||
| 8.50 | ||||||||||||||||||||||
| 8.25 | ||||||||||||||||||||||
| 8.00 | ||||||||||||||||||||||
| 7.75 | 8.50 Base | |||||||||||||||||||||
| 7.50 | ||||||||||||||||||||||
| 7.25 | ||||||||||||||||||||||
| 7.00 | ||||||||||||||||||||||
| 6.75 | ||||||||||||||||||||||
| 6.50 | ||||||||||||||||||||||
| 6.25 | 7.50 Base | |||||||||||||||||||||
| 6.00 | ||||||||||||||||||||||
| 5.75 | ||||||||||||||||||||||
| 5.50 | ||||||||||||||||||||||
| 5.25 | ||||||||||||||||||||||
| 5.00 | 6.50 Base | |||||||||||||||||||||
| 4.75 | ||||||||||||||||||||||
| 4.50 | ||||||||||||||||||||||
| 4.25 | ||||||||||||||||||||||
| 4.00 | ||||||||||||||||||||||
| 3.75 | ||||||||||||||||||||||
| 3.50 | 5.50 Base | |||||||||||||||||||||
| 3.25 | ||||||||||||||||||||||
| 3.00 | ||||||||||||||||||||||
| 2.75 | ||||||||||||||||||||||
| 2.50 | ||||||||||||||||||||||
| 2.25 | ||||||||||||||||||||||
| 2.00 | ||||||||||||||||||||||
| 1.75 | ||||||||||||||||||||||
| 1.50 | 4.50 Base | |||||||||||||||||||||
| 1.25 | ||||||||||||||||||||||
| 1.00 | ||||||||||||||||||||||
| 0.75 | ||||||||||||||||||||||
| 0.50 | ||||||||||||||||||||||
| 0.25 | ||||||||||||||||||||||
| 0.00 | ||||||||||||||||||||||