Ghosting & visual distortion
High-birefringence areas can shift transmitted light and make ghost images around point light sources more noticeable, especially at oblique angles.
PC LENS BLANKS FOR OPTICAL LABORATORIES
ZERO STRESS
PC LENS BLANKS
Eliminate internal stress. Minimize birefringence. Improve Rx processing.
Advanced polycarbonate lens blanks designed for optical laboratories, Rx finishing operations and precision lens manufacturing.
✓ Stress-controlled manufacturing ✓ Precision optical surface ✓ Rx laboratory focused
ZEROInternal Stress
LOWERBirefringence Risk
HIGHProcessing Precision
FREETrial Samples
THE PROBLEM
Why ordinary injection-molded PC can be a challenge
Uneven molecular orientation and residual stress during injection molding can contribute to birefringence and optical or processing issues.
Eye strain & discomfort
Asymmetric birefringence between two lenses can create subtle image differences and increase the visual fusion burden during prolonged use.
Challenges with polarized lenses
Birefringence can interact with polarizing films and may produce rainbow patterns or uneven polarization effects.
Higher demands for high Rx
High prescriptions and high astigmatism demand greater optical precision, making small optical deviations more noticeable.
THE SOLUTION
Zero Stress PC Lens Blanks
Our process is designed to eliminate internal stress in the blank—addressing a key source of PC birefringence.
01Controlled forming→02Zero internal stress→03Reduced birefringence→04Stable optical performance
BUILT FOR RX LABS
What Zero Stress PC means for your production line
Higher machining consistency
Precise surface geometry supports accurate processing for single-vision, astigmatic and progressive lenses.
Lower cracking risk
Reduced internal stress helps address cracking concerns during drilling and rimless processing.
More stable optical performance
Less internal stress means less stress-related birefringence and more stable optical behavior.
Special-treatment friendly
Designed for polarized, tinted and photochromic lens production.
Better production efficiency
Consistent blanks can help improve processing yield, delivery efficiency and operating cost control.
Precision-focused manufacturing
Optical design and surface precision are built around professional Rx processing needs.
AT A GLANCE
Ordinary PC vs. Zero Stress PC
| Feature | Ordinary Injection-Molded PC | Zero Stress PC |
|---|---|---|
| Internal stress | May be significant | Designed for zero internal stress |
| Birefringence | Can be significant | Minimized / addressed at the source |
| Optical stability | Can vary with stress | More stable optical performance |
| Rimless drilling | Higher cracking concern | Lower stress-related cracking risk |
| Polarized processing | Potential stress-related effects | Designed for improved compatibility |
| Tinted / photochromic | Potential stress-related effects | Designed for improved compatibility |
| Rx applications | General PC applications | Single Vision · Astigmatic · Progressive |
APPLICATIONS
Designed for demanding lens processing
01
Single Vision
Precision blank geometry for accurate Rx processing.
02
Astigmatic
Stable processing for higher optical precision requirements.
03
Progressive
Suitable for progressive lens blank processing.
04
Rimless & Drill-Mount
Reduced internal-stress risk during drilling and mounting.
05
Polarized
Designed to reduce stress-related optical interference.
06
Tinted & Photochromic
Suitable for special lens processing applications.
PRECISION OPTICS
Manufactured for optical accuracy
The supplied technical material describes precision optical surface geometry and optical design analysis using ZEMAX, with the goal of improving blank processing accuracy, yield and delivery efficiency.
- ✓ Precise surface geometry
- ✓ Accurate optical power
- ✓ Consistent semi-finished blanks
- ✓ Technical support for Rx processing
ORDINARY PCINTERNAL STRESSBirefringence risk
VS
ZERO STRESS PCZERO INTERNAL STRESSReduced birefringence
FREE SAMPLE PROGRAM
Test before you buy.
We invite qualified optical laboratories and Rx lens manufacturers to evaluate our Zero Stress PC lens blanks using their existing production process.
- Free trial samples
- No obligation to purchase
- Direct technical communication
- Compare with your current PC blanks
Request Your Free Sample
Tell us what you currently process and we will recommend a suitable sample set.
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