Low Transmission Light Diffusers (DR-IIISX)
Low transmission acrylic diffusers designed to sit directly in front of high-bright LEDs with minimal gap.
CLAREX DR-IIISX diffusers are cast acrylic sheets made with light-scattering particles, white pigments, and heavy matte textures on both sides. They are designed to reduce hot spots and improve uniformity in direct-backlit applications where bright LEDs are placed close to the diffuser.
With transmission options ranging from 5% to 40%, DR-IIISX diffusers can be selected to achieve the desired balance of diffusion, brightness control, and hiding power. For higher-transmission applications, consider CLAREX DR-IIICX bulk diffusers.
Benefits of Low Transmission Light Diffusers
High Hiding Power in Thin Materials
Available as thin as 0.5 mm while blocking up to 95% of light and providing effective diffusion.
Consistent Optical Performance
Transmission and diffusion remain consistent regardless of material thickness.
Extremely Uniform Surface Brightness
Helps reduce hot spots and create more even illumination when used in front of high-bright LEDs.
Controlled Light Transmission Options
Available in light transmission levels from 5% to 40% in 5% increments.
Effective for Minimal Gap Applications
Designed for use directly in front of bright LEDs where space between the light source and diffuser is limited.
Customizable for Application Requirements
Can be customized with features such as HiTemp formulations, fabricated finished parts, and other CLAREX options.
Common Diffuser Applications
Formulated to be used directly in front of bright LEDs with limited gap.
Direct Backlit & High-Brightness LED Displays
A good fit for backlit displays with bright LEDs positioned close to the diffuser, helping reduce hot spots, control light output, and create more uniform surface brightness
Instrument Clusters & Control Panels
Well-suited for automotive, industrial, and electronic displays where consistent brightness, clean icon visibility, and a uniform visual appearance are important.
Illuminated Icons, Indicators & Status Lights
Can be used behind illuminated symbols, status indicators, and icons where controlled transmission and even diffusion are needed.
Compact Lighting Assemblies
Suitable for space-limited designs that require effective diffusion and light attenuation in thin materials with minimal distance between the light source and diffuser
Sample materials may be available to help you evaluate material performance.
THICKNESS OPTIONS
- 0.5mm
- 0.6mm
- 0.7mm
- 0.8mm
- 1.0mm
Size Options
- Standard sheet: 400mm × 550mm
- Custom sizes: Maximum dimensions depend on application. Contact us to discuss options.
Finished Parts
Sheets can be fabricated and finished to customer specifications.
Customization
Custom diffuser sheets & parts to meet the needs of your applications.
Need a diffusion filter that meets specific transmission, thickness, or performance requirements? CLAREX DR-III SX Diffusers can be customized for display, lighting, and backlit applications that require strong hiding power, uniform brightness, and controlled light output in a thin acrylic sheet.
Select from transmission levels from 5% to 40% in 5% increments, thicknesses as thin as 0.5 mm, and custom options such as HiTemp formulations, fabricated finished parts, and application-specific sheet configurations.
Typical lead time is 4–8 weeks. Finished parts and assemblies can also be fabricated to specification.
PRODUCT Specs
DR-IIISX Diffuser Transmission Curves
| DR-IIISX DIFFUSER | TOTAL LIGHT TRANSMISSION |
|---|---|
| DR-40SX | 40% |
| DR-35SX | 35% |
| DR-30SX | 30% |
| DR-25SX | 25% |
| DR-20SX | 20% |
| DR-15SX | 15% |
| DR-10SX | 10% |
| DR-05SX | 5% |
PRODUCT PROPERTIES
Physical Properties of CLAREX DR-IIISX Diffusers
| PROPERTY | TEST METHOD | UNIT | DR-IIIS | |
| JIS | ASTM | |||
| OPTICAL | ||||
| Refractive Index | K7105 | D-542 | – | 1.49 |
| MECHANICAL | ||||
| Elongation | K7113 | D-638 | % | 2 |
| Tensile Rupture Strength | K7113 | D-638 | MPa | 50 |
| Flexural Rupture Strength | K7203 | D-790 | MPa | 50 |
| Impact Strength (IZOD) | K7111 | D-256 | KJ/m2 | – |
| Rockwell Hardness | K7202 | D-785 | – | – |
| Pencil Hardness | D0202 | – | – | 2 – 3H |
| THERMAL | ||||
| Heat Distortion Temperature | K7202 | D-648 | °C | 108 |
| Maximum Recommended Continuous Temperature | °C | 80 | ||
| *Available with higher temperature ratings on request, 90-95ºC | ||||
| Coefficient of Thermal Expansion | K6911 | D-696 | cm/cm/°C | 7 x 10-5 |
| Coefficient of Thermal Conductivity | K1413 | D-177 | W/m°C | 0.17 |
| Heat Forming Temperature | – | – | °C | 140-180 |
| Specific Heat | K7123 | D-638 | J/kg°C | 1.47 |
| ELECTRICAL | ||||
| Volume Resistivity | K6911 | D-257 | Ωm | >1016 |
| Surface Resistivity | K6911 | – | Ωm | >1016 |
| OTHERS | ||||
| Water Absorption | K7209 | D-570 | % | 0.3 |
| Specific Gravity | K7112 | D-792 | – | 1.19 |
Ready to Get Started with Low Transmission Light Diffusers?
Whether you need standard diffusion sheets, specific light transmission levels, thin-gauge material, HiTemp options, or fabricated finished parts, our team can help configure the right solution for your application.