recently The State Intellectual Property Office issued a national invention patent certificate to the SSY- III fiber birefringence measuring instrument developed by Kelly new Mstar Technology Ltd, Donghua, Shanghai, which fills the gap in China and has been funded by the Shanghai innovation fund of science and technology SMEs.

According to the national standard, the birefringence of textile fibers has Beck line method, interference method and compensation method. The traditional fixed optical path difference compensation method in China. Make The method of combination of crystal compensation sheet adopts manual adjustment of optical path difference, inconvenient operation and low measuring accuracy. At the same time, a lot of different compensation chips are needed. The compensation range is narrow, and it is not suitable for a variety of new materials birefringence measurement.

In order to overcome the defects of the existing technology, the SSY- III fiber birefringence measuring instrument breaks through the traditional compensation of the optical path difference of the differential crystal, and uses a novel stepless optical path. compensate The optical path difference produced by the continuous rotation of the crystal compensation device has a linear relationship with the rotation angle. The full wavelength measurement of fiber birefringence is used to accurately measure the fiber birefringence with the continuous change of the stretching process.