mirrors for applications where THz radiation has to be fully reflected.

Commom specification:

Material of substrate Quartz glass

Type plano-plano

Dimensions tolerance,mm +/-025

Clear apperture, % >=90

Surface quality of polished surfaces, scr/dig 40/20

Surface quality of ground surface, Ra 2.5

Surface accuracy, λ@633nm 1/4

Coating protected gold

Thickness of gold layer, nm ~400

Typical reflection curve is shown below. Measurements were made up to 1000 μm. However operating wavelength range is much wider.

Fig. Reflection od THz mirror.

The following THz mirrors are available from stock:

No. Diameter Thickness, mm

mm inches

1 25.4 1.0 6.35

2 38.1 1.5 6.35

3 50.8 2.0 6.35

4 76.2 3.0 6.35