Longpass filter

Long-pass filters are usually used to isolate areas of a broad spectrum. The purpose of this type of filter is to allow wavelengths above the specified cut-off wavelength to pass and to block wavelengths below the cut-off wavelength. Long-pass filters can provide the desired individual wavelength range in combination with a corresponding short-pass filter. Asahi Spectra offers a wide range of long-pass filters for the UV, VIS and NIR ranges.

The long-pass filters are available in two standard sizes:

• Round with a diameter of 25 mm or
• Square 50×50 mm

Special cuts or customized filters with different aperture or blocking areas can be provided. Please get in touch with your.

Applications

• Chemistry
• Biotechnology
• Medical technology
• Semiconductor industry
• Photovoltaics and more