1.High-precision optical glass will increase the light transmittance and resolution. 
2.Prevent ghost images and reflected light. 
3.Allow high-resolution imaging.
4.Inspection of reflective materials.

Major Applications:
1.Inspection of highly reflective surfaces, such as wafers, metal surfaces, film, liquid crystals and glass.
2.Imprint check.
3.Inspection of pattern of printed boards.
I agree