49-033 12.5 mm Dia. Traditional Coated OD 2.0 Longpass Filter; t=1.5mm 850nm

The 49-033 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 applications where space is a constraint.

The filter is manufactured by Edmund Optics, a leading supplier of optical components, and is identified by the catalog number 49-033. It is available for purchase directly from their website, where it is currently listed as in stock.

The Longpass Filter features a cut-on wavelength of 850 nm, meaning it begins to transmit light at this wavelength and beyond. The cut-off wavelength, which is the point at which the filter starts to block light, is 0 nm. This means that it allows the transmission of all wavelengths, making it a versatile choice for various applications.

The filter is coated on both the front and back surfaces with the EDM 49-033 coating. This coating enhances the filter's performance by reducing unwanted reflections and increasing transmission.

The filter's geometry is defined as a Thin Lens, indicating that it has been designed to minimize optical aberrations and distortions. This makes it an ideal choice for precision optical systems.