GB/T 33048-2016 in English

1. Background and significance of standard formulation

GB/T 33048—2016 "Determination of Optical Compensation Value of Polarizer" is one of the important standards in the field of optical functional film materials in my country. The standard was proposed by the China Petroleum and Chemical Industry Federation and managed by the National Technical Committee for Standardization of Optical Functional Film Materials. The main drafting unit is Shenzhen Shengbo Optoelectronics Technology Co., Ltd.

With the development of display technology, polarizers and their compensation films are increasingly used in liquid crystal displays (LCDs). In order to ensure the stability and consistency of optical performance, it is particularly important to formulate a unified measurement method. The introduction of this standard fills the gap in related fields in China and provides a scientific basis for the production and testing of polarizers.

2. Standard framework and technological evolution

3. Test methods and implementation suggestions

Test equipment configuration

• Light source: White halogen lamp, wavelength range 400nm~800nm
• Polarizing system and analyzer system: Rotation accuracy ±0.1°
• Sample stage: With rotation and translation functions, tilt angle range -50°~50°

Test step optimization suggestions

1. Ensure the alignment of the optical path and adjust the initial position of the polarizer and analyzer
2. Place the sample to be tested, paying attention to the parallelism and flatness requirements
3. Test the light intensity values at different angles in the standard sequence and record the data