84-681 50 mm Dia. Traditional Coated OD 2.0 Longpass Filter; t=5mm 1250nm

The 84-681 50 mm Dia. Traditional Coated OD 2.0 Longpass Filter is a specialized optical component designed for use in a wide range of applications. Sourced from the renowned vendor Edmund Optics, this filter is part of their extensive catalog, which includes a diverse array of optical elements from various global suppliers.

This filter is a Longpass type, a category that allows light of longer wavelengths to pass through while blocking shorter wavelengths. The specific cut-on wavelength for this filter is 1250nm, meaning it begins to transmit light at this wavelength and beyond. The cut-off wavelength, however, is 0nm, indicating that it blocks all wavelengths of light shorter than 1250nm.

The filter is circular in shape, with a diameter of 50mm and a thickness of 5mm, making it suitable for use in various optical systems. The material ID for this filter is UVFS Mal-1965, although the specific composition of the material is not provided in the item data.

The coating on both the front and back of the filter is EDM 84-665. This coating plays a crucial role in the filter's performance, as it influences the transmission and reflection characteristics of the filter. However, the specific properties of the EDM 84-665 coating are not detailed in the item data.

The filter's geometry is described as a Thin Lens, suggesting that it may have some light-bending properties. However, without further information, it is difficult to specify exactly how this geometry might affect the filter's performance.