Color Glass Series from Yutai Optics:
Golden(Yellow)Glass
Orange Glass
Red Glass
Blue Glass
Green Glass
Infrared Glass
Ultraviolet Glass
Violet Glass
Protective Glass
Heat-absorbing Glass
Neutral Grey Colored Glass
Sky-light Glass
Multiband Calibration Glass
Specifications:
Materials: Colored glass
Diameter Tolerance: +0.1/-0.20mm
Thickness Tolerance: +/-0.15 mm
Surface Quality: 60-40/80-50
Clear Aperture: > 85%
Coating: Specified by customers or uncoated