This filter box holder accepts one or two filters in series (depending on model chosen), and is air cooled by fan. Each filter is mounted on a removable slide that is screwed into the top of the filter holder box. Each filter can be removed by unscrewing its slide from the filter box holder. The air cooled filter box holder and slides accepts 1", 2" and 3" filters which are sold separately. Different models are available to accommodate the different filter sizes. Additional coupling optics maybe required to secure the filter holder onto the input of a monochromator/spectrograph, or output of a light source. This air cooled filter holder is useful when mated to a high power light source that emits enough heat to crack the filters without active cooling, even when the light source is operated for a long period of time. Filter slides are included in the price.

Fan Power
The air-cooled fan is a 115VAC fan that plugs directly into the wall electrical outlet. User must specify which power they require.

Mating to Light Sources
The air cooled FH-AC filter box holder can mate directly to a 201-1K arc lamp housing or TH3 QTH lamp housing through 2" or 1" diameter Thorlab coupling tubes. It can also be mated to a 200-1K arc lamp housing through a special input extension coupling tube.

Mating to Monochromators/Spectrographs and Sample Chambers
The air-cooled FH-AC filter box holder can mate to a monochromator/spectrograph or a sample chamber via 1" or 2" diameter Thorlab coupling tubes or Sciencetech CON1/2L or CON2/2L condensing lens assemblies. If the filter box holder is also mated to a 200-1K arc lamp housing at the input, the input extension coupling tube would be long enough such that the filter box holder could be directly mounted to the input port of the monochromator.

Air Cooling Capability
This air cooled filter holder was originally designed to filter extended range IR light from a 1KW Xenon arc lamp light source before it enters a monochromator. A 0 degree extended spectral range hot mirror was used, such that the IR light would be reflected back into the light source. The fan was powerful enough to prevent the hot mirror from cracking even after days of continuous use.

Heat Dissipation Capability
Experience has shown that the air cooled fan is powerful enough to keep an extended spectral range hot mirror from cracking under the intense heat of a 1kW Xenon arc lamp source (i.e. 200-1K Arc Lamp Housing) mated directly to it. The hot mirror inside the filter box holder, which is mounted onto the removable slide, would reflect the IR light at 0 degrees (no tilting) back into the arc lamp housing source rather than dumping it onto a heat dump. Under this configuration, the hot mirror would not break even if operated for days at a time.

Mounting Holes
When purchased separately and not part of a system, the Filter Holder does not have any pre-drilled mounting holes for mounting to Sciencetech products such as the CON1/2L or CON2/2L condensing lens assemblies. The reason is that these holes would make the holder non-light tight should it be used with other systems. if the Air Cooled Filter Box Holder is to be mated to a Sciencetech product, please specify which product at the time of order for the pre-drilled mounting holes to be added.

Hot Mirrors
The FH Filter Holder can be used with 25mm or 50mm square or round hot mirror.

Technical Specifications

• Filter Box Holder Dimensions: 4" x 4" x 3" (approx)
• Output and Input end plate flanges are 1" diameter (can be upgraded to 2" diameter)
• Fan power: 115VAC