64-621 12.5 mm Dia. Traditional Coated OD 2.0 Longpass Filter; t=1.5mm 675nm

The 64-621 is a Longpass Filter, a type of optical element designed to transmit light with wavelengths longer than a specified value while blocking shorter wavelengths. This particular model has a diameter of 12.5 mm and a thickness of 1.5 mm, making it suitable for a wide range of applications where space is a constraint.

The filter is manufactured by Edmund Optics, a leading vendor in the optical industry, and is identified by the catalog number 64-621. It is available for purchase directly from the vendor's website, with the current status indicating that it is in stock.

The 64-621 is designed to cut on at 675 nm, meaning it starts to transmit light at this wavelength. The cut off value, which indicates the wavelength at which the filter starts to block light, is 0 nm. This makes it a versatile tool for applications that require the transmission of near-infrared light.

The filter features a traditional coating on both the front and back surfaces, identified as 'edm 64-621'. This coating enhances the filter's performance and durability, ensuring reliable operation over a wide range of conditions.

The filter's geometry is shaped as a thin lens, which is a type of lens with a small thickness compared to its diameter. This design provides excellent optical performance while minimizing weight and thickness, making it ideal for applications where compactness and light weight are critical.