Liquid filters are useful for applications where the infrared is not required, and its heating effect is a problem. With our high powered sources (500 to 1600 W), they are a necessity if you are using other optical components. (Another alternative is a dichroic beam turner;see Oriel^® Beam Turning Assemblies .)
These filters use a fused silica window to transmit down to 250 nm; the NIR is absorbed by the liquid. The aluminum models take distilled water only. The steel models can take water, or copper or nickel sulfate solutions. Copper and nickel sulfate solutions prevent the growth of organics. Normal laboratory precautions should be taken when working with these solutions.

Liquid filters are useful for applications where the infrared is not required, and its heating effect is a problem. With our high powered sources (500 to 1600 W), they are a necessity if you are using other optical components. (Another alternative is a dichroic beam turner;see Oriel^® Beam Turning Assemblies .)
These filters use a fused silica window to transmit down to 250 nm; the NIR is absorbed by the liquid. The aluminum models take distilled water only. The steel models can take water, or copper or nickel sulfate solutions. Copper and nickel sulfate solutions prevent the growth of organics. Normal laboratory precautions should be taken when working with these solutions.