TIPS NO: 243
Revision:
Date: Oct 2004
Single Vision Brown and Gray PolarShades™ in Standard
Plastic Product Specifications.
Purpose: The following information provides a guideline for Rx
processing of the PolarShades Single Vision Lens in standard plastic.
|
Lens Characteristics |
PolarShades Single Vision Lens |
|
Refractive
Index |
1.498 |
|
Dispersion
Value (Abbe) |
58.0 |
|
Density |
1.320 |
|
Polarizing
Efficiency |
99% |
|
Visible Light
Transmittance |
16% |
|
UV Blockage |
UVB:
100%, UVA: 99% |
|
Chemical Resistance |
Excellent |
|
Machinability |
Excellent |
|
Rear Surface
Coating |
Optional |
|
Scratch Resistant |
In-Mold RLXPlus® |
BLANK SIZE: 78mm
diameter
BASE CURVES: 4.00, 6.00,
8.00
POWER RANGE: -6.00 to +6.00
THICKNESSES: We recommend a
minimum center thickness of 1.8mm
PolarShades Single Vision Standard Plastic Lens – DIMENSIONS
General: Standard pads and
polish materials used for surfacing CR-39® lenses can be applied to
PolarShades Lenses. If you have
questions, please contact Technical Services at 800-759-0075.
Computer Calculation of RX: The
easiest, most efficient method to calculate and process values for an Rx is to
use an existing computer software package that contains Signet Armorlite Lens design
data.If your software does not include this data, our Technical Services group
will be happy to provide the necessary specifications. Please forward us the
contact name and phone number of your software vendor.If you need a software
program for processing lenses, Signet Armorlite has developed a computer
program to calculate surfacing data. This program is available through Signet
Armorlite's Technical Services Department.
AR Coating: Because lens impact resistance is reduced by AR
coatings, we recommend conducting impact tests for lenses AR coated and sold by
your lab. It may be necessary to
increase the minimum center thickness in order to meet impact resistance
requirements and depends on the types of
backside and AR coatings that are applied. Please call Technical
Services at (800) 759-0075 for additional information about coatings and impact
resistance.
Impact Resistance: As a component, lenses of this design have been shown
by testing to be capable of being processed to meet applicable impact resistance
of FDA Regulations 21 CFR 801.410 and ANSI Z80.1. Conformance to this standard
is the responsibility of all subsequent processors. Impact resistant lenses are not
unbreakable. Obviously damaged lenses should be replaced immediately.
Tinting: We do not
recommend tinting PolarShades lenses.
CR-39
is a registered trademark of PPG.
RLXPlus is a registered trademark, and PolarShades is a trademark of
Signet Armorlite, Inc.
PolarShades Single Vision in Standard Plastic Base Curve Selection Chart
