64-676 12.5 mm Dia. Traditional Coated OD 2.0 Longpass Filter; t=1.5mm 825nm

The 64-676 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 64-676. It is available for purchase directly from their website, and the current status indicates that it is in stock, ensuring quick delivery for your projects.

The Longpass Filter features a cut-on wavelength of 825 nm, meaning it starts to transmit light at this wavelength and beyond. The cut-off wavelength is 0 nm, indicating that it blocks all wavelengths shorter than 825 nm. This specific characteristic makes it ideal for applications where the detection of longer wavelengths is required, such as infrared (IR) imaging or spectroscopy.

The filter's front and back surfaces are coated with the EDM 64-676 coating, which is specifically designed for this type of filter. The coating enhances the filter's performance and durability, ensuring reliable and consistent operation over time.

The filter's geometry is defined as a Thin Lens, a type of optical element with a curved surface that bends light as it passes through. This feature can be beneficial in certain applications where light needs to be focused or dispersed.