Angle Diffuser Sheet

A1: "D" is an abbreviation for Degree, representing the fixed diffusion angle of the Angle Diffuser Sheet, that is, the main distribution range of the emitted light after passing through the diffuser. The key difference between different D values ​​lies in the light coverage and brightness concentration: the smaller the D value (e.g., 5D, 10D), the more concentrated the light and the higher the local brightness, but the narrower the coverage area; the larger the D value (e.g., 80D, 90D), the wider the light coverage and the more uniform the brightness, but the lower the local concentration.

A2: Selection should be based on core needs: ① For directional lighting or small-area high-brightness display (such as spotlights, mobile phone screens), prioritize 5D-20D small-angle models; ② For medium-range uniform illumination (such as office panel lights, tablets), choose 20D-40D medium-angle models; ③ For large-area wide-angle coverage (such as outdoor large screens, living room ceiling lights), choose 55D-90D large-angle models. In addition, factors such as light source power and installation distance should be considered. If necessary, consult the manufacturer for specific parameters and customization advice.

A3: Light transmittance and D-value are somewhat related. Generally, the higher the D-value (the wider the light diffusion range), the slightly lower the light transmittance. However, high-quality products will control light loss within 10%, which basically does not affect actual use. Precautions for use: ① Avoid prolonged exposure to strong ultraviolet radiation (such as unprotected outdoor environments); choose models with UV-resistant coatings. ② Avoid contact with corrosive substances such as strong acids and alkalis to prevent damage to the substrate. ③ Avoid forceful squeezing or bending during installation to prevent microstructural deformation that could affect diffusion performance.

A4: Yes. Based on the excellent processing properties of substrates such as PC and PMMA, Angle Diffuser Sheets can be cut, punched, bent, hot-pressed, and laminated with other optical films (such as brightness enhancement films) according to actual needs. However, the following precautions should be taken during processing: Use sharp tools for cutting to avoid rough edges; avoid punching holes in the core optical area; ensure the surface is clean during lamination to prevent dust from affecting optical performance.

A5: The most fundamental difference between the two lies in the controllability of the diffusion angle and optical stability: ① The diffusion angle of the Angle Diffuser Sheet is fixed and precise (within ±2° error), resulting in uniform light distribution and high transmittance; ② Ordinary frosted films achieve diffusion through surface roughening, leading to a blurry and irregular diffusion angle, which easily causes problems such as "chaotic light scattering" and "uneven brightness," and the transmittance is generally below 70%, resulting in significant light loss. Furthermore, the weather resistance and durability of the Angle Diffuser Sheet are far superior to those of ordinary frosted films.