SRT Microprism Acrylic Sheet (PMMA-Prism)

Engineered for Visual Comfort (UGR < 19)

Modern office lighting requires a delicate balance between brightness and comfort. SRT PMMA-Prism is the solution. The micro-prismatic structure works by "cutting off" high-angle light rays that cause glare, redirecting them downwards onto the work surface. When installed correctly, this sheet helps luminaires achieve a Unified Glare Rating (UGR) of less than 19, which is the mandatory standard for workspaces involving reading, writing, and computer use (EN 12464).

Optical Efficiency & Transmission

Unlike milky diffusers that absorb light to reduce glare, SRT Microprism relies on optical refraction. This allows it to maintain a very high light transmission of 90% (Plain Side) to 96% (Patterned Side). The result is a highly efficient fixture that maximizes lumen output while maintaining a soft, professional aesthetic.

Surface Texture & Orientation

The sheet features one perfectly smooth side and one textured side containing the micro-pyramids. For standard de-glaring applications, the prismatic side typically faces outwards (away from the LEDs), though this can vary based on specific luminaire design. The material is rigid, lightweight, and UV-stable, ensuring it will not yellow in sunlight or under high-output LEDs.

Processing & Fabrication

SRT PMMA-Prism can be cut to size using laser cutting or saw blades suitable for acrylic. Laser cutting is particularly recommended as it seals the edges and prevents the micro-prisms from chipping. While the sheet can be cold-curved or line bent, deep thermoforming is generally not recommended as stretching the material distorts the prism geometry and alters the light distribution properties.

Typical Use Cases

Specifically engineered for suspended ceiling LED panels in modern workspaces. By controlling the angle of light distribution, it prevents the harsh glare that reflects off computer monitors. This protects employees from eye strain and headaches, making it a mandatory component for EN 12464 compliant office fit-outs.

Availability

• Standard Size: 2500 x 1250 mm
• Thickness: 2mm and 3mm (Standard for lighting grids)
• Pattern: Ref. 150 Microprism
• Service: Cut-to-size service available.

Optical Grade Selection Guide

• SRT Opal (Ref 385): 34% Transmission. High density for maximum hiding power. Best for signage and deep channel letters.
• SRT LED Ice (Ref 519): 72% Transmission. High efficiency diffuser. Best for shallow LED lightboxes to maximize brightness without hotspots.
• SRT Frost (Satin): 70% Transmission. Velvet-textured finish. Insensitive to fingerprints; ideal for furniture and architectural lighting.
• SRT Prismatic (Ref 16): 90% Transmission. Standard diamond pattern. Breaks up light for general illumination and skylights.
• SRT Microprism (Ref 150): 90% Transmission (UGR < 19). Precision micro-pattern for glare control. Essential for EN 12464 compliant office lighting.