Cold mirrors reflect some or all of the visible range, and transmit the IR. Cold mirrors are used in applications where it is desirable to reflect a cool beam of visible light and remove the heat by transmission.
Cold mirrors are typically used at 45 degrees angle to the light source. Cold mirrors effectively reflect the visible light to the object, while allowing heat to pass through.
Spectral Characteristics, @ 45 Degrees AOI
- Ravg > 90%: 420 nm - 630 nm
- Tavg > 85%: 750 nm - 1,200 nm
Physical Characteristics
- Thickness
- Glass: 0.125" nominal
- Borofloat®: 0.129" nominal
- Edge Configuration
- As broken, straight sides, cut to a tolerance of + 0.032"
Durability
JDSU 45 degree UV Cold Mirrors withstand the environmental tests as outlined in humidity requirements of MIL-C-675A, as well as hardness specifications per MIL-M-13508C (50-rub cheesecloth test).
Note: These specifications are exclusive of substrate absorption.