Heat-Absorbing Glass for Medical Lights & Projectors

Insulated glass is a selective absorbent glass with slightly blue-green close to colorless color. It can be divided into phosphate absorption glass and silicate absorption glass. They do not absorb visible light rays significantly, but absorb a large amount of near-infrared light that generates heat. Any application that requires high light intensity and needs to be separated from heat can be applied.

Technical indicators

Material: Insulated optical glass grade: (KG1, KG2, KG3).
Surface quality: 0/0, 40/20 to 80/50.
Surface accuracy: 1/10 in., 1/4 in. – 2 in.
Thickness tolerance: ±0.01 mm to ±0.02 mm.
Parallelism: 5 Arc second to 1 Arc Minute.
Processing range: the thinnest thickness can reach 0.2 mm.

Four different shapes of insulated glasses on black background.

Insulated glass is slightly green and close to colorless.

Three round shape insulated glass on blue background.

Round insulated glass

Four rectangular shape insulated glass on blue background.

Rectangular insulated glass

Features

Insulating glass does not absorb visible light rays significantly, but absorbs a large amount of near-infrared light that generates heat. Any application that requires high light intensity and needs to be separated from heat can be applied.

The insulating glass GRB1, GRB2, GRB3, (KG1, KG2, KG3) are characterized by high transmission of visible light and effective absorption of infrared rays (especially for 1064 nm infrared absorption).

Application

Insulating glass is used in cold light source products: such as operating room cold light, slide projector, projector.

A piece of insulated glass is installed on the slide projector.

Insulated glass for slide projector

Five insulated glasses are installed on the medical light.

Insulated glass for medical light

Table 1: Insulating Glass Characteristics
Brand	Thickness(mm)	A (2856k)			D65			Chemical Stability		ND	a × 10^-7 (/°C)	Tg (°C)	Ts (°C)	S
Brand	Thickness(mm)	x	y	Y	x	y	Y	DA	DW	ND	a × 10^-7 (/°C)	Tg (°C)	Ts (°C)	S
KRB1	3	0.439	0.412	91.7	0.307	0.330	90.8	3	2	1.510	59	587	656	2.54
KRB3	2	0.440	0.413	86.5	0.311	0.334	87.4	2	3	1.512	59	587	656	2.55

Table 2: Insulating Glass Technical Requirements
Brand	Thickness (mm)	420 (nm)	500 (nm)	600 (nm)	700 (nm)	800 (nm)	900 (nm)	1000 (nm)	1060 (nm)	2200 (nm)
KRB1	3	≥85.0	–	–	45.0–70.0	–	–	≤4.0	–	–
KRB2	2	≥83.7	≥83.7	≥80.0	≤61.9	≤30.0	≤9.1	–	≤1.8	–
KRB3	2	≥81.9	≥81.0	≥76.4	≤50.6	≤12.9	≤2.8	–	≤0.1	≤0.9

Table 3: Bubble, Article, Stress Class of Insulating Glass
Bubble	Strip	Stress
C	3C	4
D-C	3C	4