★ Diffuse lighting, bright field of view.
★ Uniform illumination and good sensitivity.
★ Compact size and simple structure.
★ Easy to operate, reliable and practical.

Instrument Introduction:
By observing the phenomenon of optical birefringence, the quality of optical glass, glass products, or other small transparent products can be quickly and continuously verified.

Using instruments for transportation ：
Stress gauge is an instrument used to check the magnitude and distribution of internal stress in transparent objects. Not only is it widely used in industries such as optical glass, optical instruments, glass products, and plastic products, but it also plays an important role in the inspection of safety and explosion-proof indicators in building materials, lighting fixtures, pharmaceuticals, beverages, and handicrafts. It has many applications in the fields of crystal jewelry production, geology and mineral resources, and material science. At the same time, this instrument is also an ideal teaching and experimental equipment for various colleges and universities.