MF620-52 25 mm Dia. TRITC/CY3.5 Emission Filter; CWL=620nm; BW=52nm

The MF620-52 is a 25 mm diameter Bandpass Filter, specifically designed for use in optical systems that require precise wavelength selection. This filter, manufactured by Thorlabs, is a part of their extensive catalog of optical elements, renowned for their quality and performance.

The filter is designed to transmit light within a specific range of wavelengths, centered at 620nm with a bandwidth of 52nm. This makes it ideal for applications that require the isolation of light in this spectral region, such as fluorescence microscopy using TRITC or CY3.5 dyes. The cut-on wavelength is 594nm, and the cut-off wavelength is 646nm, ensuring a high level of transmission for the desired wavelengths and effective blocking of unwanted light.

The MF620-52 filter is made from UVFS, a material with excellent optical properties and a refractive index similar to that of glass. This allows it to be used in a variety of optical systems without introducing significant aberrations. The filter has a thickness of 3.5mm, providing mechanical stability and rigidity.

The front and back surfaces of the filter are coated with a proprietary coating, identified as 'tho mf620-52'. This coating enhances the filter's performance by reducing surface reflections and improving transmission. The filter's shape is that of a Thin Lens, which can be beneficial in certain optical configurations.