FB4000-500 Dia. 1 in IR Bandpass Filter; CWL=4.00 µm; FWHM=500nm

The FB4000-500 is a high-quality bandpass filter, designed and manufactured by Thorlabs, a leading vendor in the optical industry. This filter is specifically engineered for use in the infrared (IR) spectrum, with a central wavelength (CWL) of 4.00 µm and a full width at half maximum (FWHM) of 500nm.

The filter is circular in shape, with a diameter of 1 inch (25.4mm) and a thickness of 3 units, making it compatible with a wide range of optical systems. It is constructed from sapphire ow mal-1972, a material known for its exceptional optical properties and durability.

The FB4000-500 features a thin lens shape, and its coating on both the front and back surfaces is designed to enhance its performance in specific wavelength ranges. The filter is designed to cut on at 3750 and cut off at 4250, providing a narrow band of wavelengths for optimal performance.

According to the vendor's information, this filter is currently in stock and available for immediate purchase. Further details, including technical specifications and purchasing information, can be found on the Thorlabs website using the provided weblink.