CLAREX AntiReflection Coated Acrylic (AR, MH)
Optical coatings for Increased Transmission and Reduced Reflection
CLAREX Anti-Reflection (AR) Coated Filters have a multi-layer AR coating which reduces reflections. The decreased reflection results in increased transmission. The sheets are Hardcoated prior to applying the AR coatings thus increasing the scratch and chemical resistance of the sheets as well.
An oleophobic Anti-Smudge coating could be added to the Anti-Reflection coated surfaces. While this additional coating will not prevent fingerprints and smudges, it makes it much easier to clean them off.
The AR coatings could be combined with non-glare textured surfaces to further reduce glare and reflection.
The standard AR coating is designed for the visible range. However, the AR coating design could be customized, such as for applications in the NIR (click for more info) and UV ranges.
Benefits
- Optical Grade Filters – 100% Visually Inspected
- Excellent transmission, greater than 98% in the visible (or design) range
- Excellent surface hardness
- Anti-smudge coating makes the surface easier to clean (but cannot ‘prevent’ fingerprints).
- AR available one side or two sides with or without anti-smudge coating
- Available with custom-tuned antireflection coating (more info here)
- Machines and Laser Cuts Great
- Can be Customized
UNCOATED vs. AR COATED under a bright light
Reflection of a very bright light source. The sample on the right (with blue reflection) has AR coating. Reflection intensity is much lower.
Applications
- Protective window for flat panel displays
- Sunlight readable displays
- Barcode scanner exit windows
- Camera enclosure windows
- Machine vision
- Sensor windows
Thicknesses
- 0.2mm
- 0.25mm
- 0.3mm
- 0.35mm
- 0.4mm
- 0.5mm
- 0.6mm
- 0.7mm
- 0.8mm
- 1.0mm
- 1.2mm
- 1.5mm
- 2.0mm
- 2.5mm
- 3.0mm
- 3.5mm
- 4.0mm
- 4.5mm
- 5.0mm
- Custom
Sheet Size
- 290 x 360mm Coated area standard
- Custom sizes available upon request
Transmission/Reflection Curves
Uncoated clear acrylic will reflect about 8% of incoming light. Half of the reflections coming off the front (first) surface, and the other half coming off the rear (second) surface. AR coating applied on one side will eliminate about half the total reflections resulting in about 4% total reflection. When AR coating is applied on both sides, the total reflection is reduced to about 1%. These curves show the performance of clear acrylic with standard visible AR coating on one side and on two sides.
Physical Properties CLAREX Anti Reflection Filters (AR Acrylic)
| Property | Method | Unit | Value |
|---|---|---|---|
| Specific Gravity | ASTM D-792 | 1.19 | |
| Elongation | ASTM D-638 | % | 5 |
| Flexural Rupture Strength | ASTM D-790 | kg/cm2 | 800 |
| Heat Distortion Temperature | ASTM D-648 | °C | 110 |
| Maxiumum Recommended continuous temperature | °C | 80 | |
| *Available with higher temperature ratings upon request, 90-95 °C | |||
| Coefficient of Thermal Expansion | ASTM D-696 | cm/cm/ºC | 7 x 10-5 |
| Heat Resistance | 80ºC x 100hr | No Change | |
| Cold Resistance | -40ºC x 100hr | No Change | |
| Humidity Resistance | 60ºC x 90% x 100hr | No Change | |
| Thermal Cycle | -40ºC <> 80ºC (10 cycles) | No Change | |
| Sunshine Weather Meter | 100hr | No Change | |
| Pencil Hardness | 6-8H | ||
| Contact Angle | 114º | ||
| Chemical Resistance | |||
| Isopropyl Alcohol (50%) | No Change | ||
| Soap Aqua Solution | No Change | ||
| Water | No Change | ||
| Sulfuric Acid | Dissolved | ||
| Sodium Carbonate | Dissolved | ||