FB920-10 Dia:1 in Bandpass Filter; CWL=920 +-2nm; FWHM=10 +-2nm

The FB920-10 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 from different vendors worldwide. The FB920-10 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 920 nm, with a full width at half maximum (FWHM) of 10 nm, providing a relatively narrow band of passable wavelengths. The CWL is the wavelength at which the filter's transmittance is maximum, while the FWHM is the width of the transmittance curve at half its maximum value. This specific filter is designed to have a cut-on wavelength of 915 nm and a cut-off wavelength of 925 nm.

The FB920-10 has a diameter of 1 inch (25.4 mm) and a thickness of 3.5 mm, making it compatible with many optical systems. The front and back of the filter are coated with "tho fb920-10", which is Thorlabs' specific coating for this filter. The filter's shape is that of a thin lens, which is often used in optical systems to reduce weight and thickness.

According to Thorlabs' website, the FB920-10 is currently in stock, and the web link provided is valid. This information is subject to change, so it's always a good idea to check the vendor's website for the most up-to-date information.