39-306 12.5 mm Dia. Hard Coated OD 4.0 10nm Bandpass Filter; t=2 mm 266nm

The 39-306 is a Bandpass Filter with a diameter of 12.5 mm, sourced from the reputable optical vendor, Edmund Optics. This filter is designed to transmit light within a specific range of wavelengths, making it an essential component in various optical systems.

The filter's primary function is to allow light in the 266 nm range to pass through while blocking other wavelengths. The cut-on wavelength is 261 nm, and the cut-off wavelength is 271 nm, indicating a narrow bandwidth of 10 nm. This precise wavelength selection is crucial in applications such as fluorescence microscopy, spectroscopy, and laser technology.

The filter is made from UVFS Mal-1965 material, a common choice for ultraviolet applications due to its excellent transmittance and stability. The filter's thickness is 2 mm, providing sufficient structural integrity while minimizing optical distortions.

The 39-306 filter features hard coating on both the front and back surfaces. This coating enhances the filter's durability, making it resistant to scratches and other forms of damage. It also reduces surface reflections, improving the overall efficiency of the optical system.

The filter's shape is a Thin Lens, which is beneficial in applications where a flat surface is not feasible or desirable. This shape allows the filter to be easily integrated into various optical systems.