The three core capabilities of solar film—sun protection, vision clarity and heat insulation—are determined by UV rejection rate, visible light transmittance and infrared rejection rate. These indicators cannot be judged by the naked eye. Relying on self-developed optical detection technology and a high-precision sensor system calibrated by the South China National Metrology Institute, Guoou Solar Film Tester converts the invisible performance of film materials into traceable objective data. It is more suitable for the detection needs of automotive film, architectural film, skin care film and other full scenarios. The following disassembles the precise quantification logic of Guoou Tester for the three core indicators to see how professional equipment achieves accurate data and efficient detection:
1. UV Rejection Rate: Precisely Focus on Harmful Bands, Quantify Hard-Core Sun Protection Ability
Core Detection Band: Focus on the core harmful 365nm UV band (the most significant damage to skin and car interiors), covering the full UV spectrum of 200-380nm.
Guoou Quantification Solution: Equipped with a high-sensitivity special UV sensor, it emits standard 365nm UV light to vertically penetrate the film material, synchronously captures the energy of incident light and transmitted light, and calculates through the built-in precise algorithm: UV rejection rate = (1 - Transmitted light energy/Incident light energy) × 100%. The instrument has a resolution of 0.1% and a measurement accuracy of ±2%, which can accurately capture numerical differences of ≤0.1%. Even the 99.99% high rejection rate of high-end sun protection film can be accurately presented, preventing inferior films from falsely marking sun protection parameters, and is also suitable for the special sun protection detection needs of skin care film.
2. Visible Light Transmittance: Comply with Regulatory and Vision Requirements, Quantify Clear Light Transmittance
Core Detection Band: Fully conform to the 380-760nm visible spectrum of the human eye, matching the detection benchmark of front windshield film in traffic regulations.
Guoou Quantification Solution: The sensor accurately collects the real energy of transmitted light and quickly calculates through the formula: Visible light transmittance = (Transmitted light energy/Incident light energy) × 100%. With an accuracy of ±1%, the instrument can accurately verify whether the front windshield film meets the regulatory requirement of ≥70%, and clearly distinguish the balance between light transmittance and privacy of different film materials. The detection data can be directly used as an objective basis for in-store demonstration and construction acceptance.
3. Infrared Rejection Rate: Dual-Band + Full Infrared Coverage, Quantify Real Heat Insulation Performance
Core Detection Band: Focus on covering the core infrared bands of 940/1400nm, and fully cover the 760-2500nm infrared spectrum (accounting for 53% of total solar heat).
Guoou Quantification Solution: Different from ordinary single-band detection equipment, Guoou Tester adopts dual-sensor synchronous acquisition technology to capture the energy of reflected light and transmitted light at the same time, and calculates through an algorithm more in line with the actual heat insulation effect: Infrared rejection rate = (Reflected light energy + Absorbed light energy)/Incident light energy × 100% (Absorbed light energy = Incident light energy - Transmitted light energy - Reflected light energy).
With "precise quantification + scenario adaptation" as the core, Guoou Solar Film Tester makes the sun protection, vision and heat insulation performance of solar film no longer "unsubstantiated". Whether it is a film store impressing customers with data, a manufacturing enterprise conducting batch quality inspection, or a consumer inspecting goods to avoid pitfalls, quality judgment can be realized through objective data, truly exerting the core value of detection instruments.
