89-679 50 mm Dia. Hard Coated High Performance OD 4.0 Shortpass Filter; t=3 mm 1250nm

The 89-679 is a high-performance shortpass filter, designed and manufactured by Edmund Optics, a leading global provider of optical components. This filter, with a 50 mm diameter and 3 mm thickness, is specifically engineered for use in applications where the control of wavelengths is crucial.

The filter features a hard coating, enhancing its durability and resistance to wear and tear, making it an ideal choice for demanding environments. The shortpass characteristic of this filter allows wavelengths up to 1250nm to pass through while effectively blocking longer wavelengths. This property is particularly useful in applications such as fluorescence microscopy, where the detection of specific wavelengths is paramount.

The 89-679 filter is made from UVFS Mal-1965, a material known for its excellent optical properties. The filter's geometry, with a diameter of 50mm and a thickness of 3mm, is designed to provide a balance between compactness and optical performance. The filter's thin lens shape further contributes to its performance, ensuring minimal distortion and high-quality imaging.

The filter's coating, both on the front and back, is EDM 89-671, a coating known for its ability to enhance the filter's performance and durability. This coating ensures the filter maintains its optical properties even after prolonged use.