87-247 25 mm Dia. Hard Coated Quad-Band Fluorescence Bandpass Filter; t=2 mm 440/521/607/700nm

The 87-247 is a Quad-Band Fluorescence Bandpass Filter, meticulously crafted by Edmund Optics. This filter, with a diameter of 25 mm and a thickness of 2 mm, is designed to transmit light at specific wavelengths while blocking unwanted spectral ranges.

The filter's primary function is to allow the transmission of light at four distinct wavelengths: 440nm, 521nm, 607nm, and 700nm. This makes it an ideal choice for applications that require the isolation of these specific wavelengths, such as fluorescence microscopy or multi-spectral imaging.

The 87-247 filter features hard coating on both the front and back surfaces, enhancing its durability and resistance to scratches and other forms of damage. This coating also aids in maintaining high transmission efficiency and low autofluorescence, which is crucial in fluorescence-based applications.

The filter's geometry is defined by a diameter of 25 mm, ensuring compatibility with a wide range of optical systems. The thickness of 2 mm is sufficient to maintain the filter's structural integrity while minimizing optical distortions.

The physical data of the filter includes a cut-on wavelength of 420nm and a cut-off wavelength of 460nm. The cut-on wavelength is the shortest wavelength that the filter begins to transmit, while the cut-off wavelength is the longest wavelength that the filter continues to transmit.

The filter's coating is specified as EDM 87-239 on both the front and back surfaces. This coating is designed to enhance the filter's performance and longevity.