The dichroic filters produced by Auer Lighting are usually flat glass panes made of borosilicate glass that have been coated with alternating oxide layers.
Following notes should be generally considered:

• Use gloves while handling. Fingerprints on the filter do affect the performance / lifetime.
• Do not damage filters while handling. Smallest defects can cause a pre-damage that could lead to breakage during operation.
• Stock filters in closed packing units only to avoid dust/pollution.
   

In general, filters are only designed for use with a specific light source. These can be LEDs, discharge lamps or other light sources. Figure 1 and 2 show typical set-ups.

Depending on the application attention has to be paid to:

• The filters are calculated for a certain angle of incidence (AOI). Unless otherwise specified the filter is calculated for an AOI of 15°.
• The filter should match the light source (UHP, LED,…).
• The generated spectrum of a light source together with a specific filter creates a unique coloration, e.g. on a screen. When you change the light source, you inevitably change the light spectrum. Accordingly, the same filter gives a different color impression when a different light source is used.
   

The following points are particularly important:

• The filter must be installed in the right direction. The coated side is facing the light source.
• The filter must not be installed in the focus. The energy in the focus can lead to overheating and destroy the filter.
• UV / IR filters are a must for discharge lamps.
• Mounting of the filters must be stress-free.
• The maximum operating temperature must not exceed 400 °C.