RSF-25C-664RU 25 mm Dia. Mounted Raman Longpass Edge Filter; t=3.5mm 664nm

The RSF-25C-664RU is a 25 mm diameter Raman Longpass Edge Filter, manufactured by OptoSigma. This filter is designed for use in systems where a longpass edge filter is required, specifically for a cut-on wavelength of 664nm. The filter is mounted, providing a convenient solution for direct integration into optical systems.

The filter's geometry includes a diameter of 25mm and a thickness of 3.5mm, making it suitable for applications where a substantial optical path length is needed. The base shape of the filter is circular, a common and versatile shape in optical systems due to its symmetry and ease of alignment.

The material of the filter is UVFS MAL-1965, a type of optical glass known for its high transparency in the ultraviolet and visible regions of the spectrum. This makes it ideal for use in Raman spectroscopy, where high transparency in the visible range is essential.

The coating on both the front and back surfaces of the filter is Opt RSF-664RU. This coating is specifically designed to provide the longpass edge filter functionality, allowing light of wavelengths shorter than 664nm to pass through while blocking light of longer wavelengths.

The shape of the filter is thin lens, indicating that it has been shaped to provide focusing or collimating capabilities. This can be beneficial in systems where the filter needs to be placed at a specific distance from other optical elements.

The filter is currently in stock and available for purchase through the OptoSigma website, as indicated by the "weblink status" field in the item data.