Standard Solutions > Optics > Cold mirrors

Cold mirrors

Mirrors

Cold mirrors

Cold mirrors are used to reflect visible light and remove heat through transmission. They should preferably be operated at an angle of incidence of 45°. The most common wavelength range for transmission through the cold mirror is 800 nm – 1200 nm. The average transmission range is T > 85%. In addition, R > 95% for 400 nm – 700 nm.

Features

  • High transmission for the visible wavelength range
  • Highly reflective for infrared

Technical data

Cold mirrors
Material

Borosilicate glass

Size

15 mm to 300 mm

Thickness

3.3 mm

Dielectric mirror coating
Transmission (typical)

> 85 % between 425 nm – 1000 nm

Reflection (typical)

> 90% between 400 nm – 700 nm

Surface quality

80/50 scratch/dig

Flatness

λ/2 @ 633 nm per inch

Protective chamfer

0.3 mm x 45°

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