FB650-10 Dia:1 in Bandpass Filter; CWL=650 +-2nm; FWHM=10 +-2nm

The FB650-10 is a Bandpass Filter from Thorlabs, designed with a circular base shape and made from soda lime ru clear material. This filter is part of Thorlabs' extensive catalog, which includes a wide variety of optical elements sourced from vendors worldwide. The FB650-10 is specifically designed for use in systems where a narrow band of wavelengths needs to be isolated or passed, while the rest are blocked.

The filter has a center wavelength (CWL) of 650 nm, with a full width at half maximum (FWHM) of 10 nm, providing a relatively narrow passband. The CWL is the wavelength at which the filter's transmittance is maximum, while the FWHM is the width of the passband at half the maximum transmittance. This particular filter is designed to have a passband that is 10 nm wide, centered around 650 nm.

The FB650-10 has a diameter of 1 inch (25.4 mm) and a thickness of 3.5 mm. The cut-on wavelength is 645 nm, and the cut-off wavelength is 655 nm. These wavelengths represent the points at which the filter's transmittance starts to decrease significantly.

The filter's front and back are coated with "tho fb650-10", which is a proprietary coating from Thorlabs. This coating enhances the filter's performance and durability. The filter's shape is that of a thin lens, which is ideal for applications where a flat surface is required.

The FB650-10 is currently in stock and can be purchased directly from Thorlabs' website. The web link provided in the item data is valid and directs to the product page for this filter.