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Heat-Absorbing Glass for Medical Lights & Projectors

 Four different shapes of insulated glasses on black background.
Insulated glass is slightly green and close to colorless.

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.
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
x y Y x y Y DA DW
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

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