FBH850-40 Premium Bandpass Filter; Dia:25 mm; CWL=850nm; FWHM=40nm

The FBH850-40 Premium Bandpass Filter is a high-quality optical component designed for precise wavelength selection, manufactured by Thorlabs. This filter is circular in 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 specifically designed for a central wavelength (CWL) of 850 nm, with a full width at half maximum (FWHM) of 40 nm. This means it allows light within a 40 nm range around 850 nm to pass through while blocking other wavelengths. This feature makes it ideal for applications that require narrowband wavelength filtration, such as fluorescence microscopy, optical communication, and laser systems.

The FBH850-40 filter is made from UVFS material, identified as MAL-1965 in Thorlabs' catalog. It features a thin lens shape, which can help minimize optical aberrations. The filter's coating, applied on both the front and back surfaces, is designated as 'tho fbh850-40'. This coating enhances the filter's performance by reducing reflection and improving transmission.

According to Thorlabs' website, this item is currently in stock, indicated by the 'Valid - in stock' status in the item data. For more information, including detailed specifications and purchasing options, please refer to the provided weblink.