Dichroic Filters (Hot Mirrors)

Click on thumbnail to view PDF of charts.

Click on thumbnail to view PDF of charts.

Dontech manufactures a variety of dichroic filters for the reflection of near infrared (NIR) radiation while transmitting high levels of primary visible components from electronic displays (e.g. LCDs). These dichroic filters are commonly referred to as “hot mirrors”. Hot mirrors are complicated and relatively thick dielectric stacks, which create an interference filter that reflects deep red and near IR wavelengths.

Common applications include night vision compatibility for a full color LCD per MIL-STD-3009. For example the transmission curve for CN303-11 transmits over 88% of an LCD’s red, green, blue (RGB) components while reflecting over 99% of the energy from 630 to 930 nm.

Dontech application engineers can recommend the hot mirror best suited for your application. For additional information on night vision compatibility, please contact a Dontech applications engineer, or request that a hard copy of the Windows Design Guide be sent to you.