64-690 50 mm Dia. Traditional Coated OD 2.0 Longpass Filter; t=5mm 825nm

The 64-690 is a Longpass Filter, part of the extensive catalog of optical elements offered by Edmund Optics. This filter, with a diameter of 50 mm and a thickness of 5 mm, is designed for use in advanced optical systems. The Longpass Filter type implies that it allows the transmission of longer wavelengths while blocking shorter ones.

The cut-on wavelength for this filter is 825 nm, meaning it begins to transmit light at this wavelength and beyond. The cut-off wavelength, however, is 0 nm, indicating that it blocks all wavelengths shorter than 825 nm. This specificity in wavelength management makes it an ideal component for various optical applications.

The filter is made from UVFS Mal-1965 material, a detail that can be crucial for users who require specific material properties in their optical systems. The front and back of the filter are coated with EDM 64-676, a coating type that enhances the filter's performance and durability.

The filter's shape is described as Thin Lens, suggesting that it has been designed to minimize optical aberrations and distortions, thereby improving the overall performance of the optical system in which it is used.

For more information, including pricing and availability, users can refer to the provided weblink, which is valid and indicates that the filter is currently in stock.