Color Filter Glass : Products & Services

Heat Absorbing Filters

These slightly bluish glass filters feature high transmittance in the visible region and good absorption of heat rays (infrared rays).

The latter efficiently absorb thermal radiations emitted from a light source, and so are highly effective when employed for slide projectors and a variety of illumination equipment.

Note: " Strengthened glass, " produced by tempering processes, may also be supplied to minimize the cracking of filter glass due to thermal shock.

Color Filter Glass : Heat Absorbing Filter Data
print-friendly data tabledefinition of terms
Item / Filter Type Standard Value Color Specification (Standard illuminants A) Thickness Reflective Index Chemical Properties Thermal Properties Mechanical Properties Specific Gravity
T750 (%) T1,000 (%) Tav (%) x y mm nd Dw DA Tg TS α -30/70 α 100/300 HK FA S
HA-30 <35 <1 80±5 0.439 0.412 3.0 1.524 2 1 555 615 58 67 570 140 2.55
HA-50 <55 <3 80±5 0.441 0.411 3.0 1.524 1 1 585 645 60 66 570 140 2.51
print-friendly data table
T750(%): Transmittance at 750nm
T1,000(%): Transmittance at 1000nm
Tav(%): Average Transmittance at 400~700nm

Note: The listed data are standard value. Because of continuous product improvement, the various data listed are subject to change without notice.