FBH400-40 Premium Bandpass Filter; Dia:25 mm; CWL=400nm; FWHM=40nm

The FBH400-40 Premium Bandpass Filter is a high-quality optical component designed for precise wavelength selection, manufactured by Thorlabs. This filter features a circular shape with a diameter of 25 mm and a thickness of 2 mm, making it compatible with a wide range of optical systems.

The filter is designed to transmit light within a specific wavelength range, centered at 400 nm, with a full width at half maximum (FWHM) of 40 nm. This means it allows light between 380 nm and 420 nm to pass through, effectively blocking out other wavelengths. This property makes it ideal for applications that require narrowband wavelength selection, such as fluorescence microscopy, spectroscopy, and laser systems.

The FBH400-40 is made from UVFS material, identified as MAL-1965 in Thorlabs' catalog. It features anti-reflection coatings on both the front and back surfaces, reducing unwanted reflections and increasing transmission efficiency. The coating type is specified as 'tho fbh400-40' for both surfaces.

This filter is currently in stock and available for immediate shipping, as indicated by its weblink status. For more information, including technical specifications and purchasing options, please refer to the provided weblink.