68-655 25 mm Dia. Traditional Coated Infrared (IR) Longpass Filter; t=1mm 4500nm

The 68-655 is a 25 mm diameter Infrared (IR) Longpass Filter, manufactured by Edmund Optics. This filter is designed with a traditional coating, featuring a catalog number of 68-655. The filter's primary function is to allow the transmission of longer wavelengths while blocking shorter wavelengths, making it ideal for infrared applications.

The filter is characterized by its circular shape and thin lens design, with a diameter of 25 mm and a thickness of 1 mm. It is constructed from Germanium Burnett, a material known for its excellent transmission properties in the infrared spectrum.

The 68-655 filter has a cut-on wavelength of 4500 nm, which is the wavelength at which the filter begins to transmit light. Conversely, it has a cut-off wavelength of 0 nm, meaning it blocks all wavelengths shorter than 4500 nm. This specific cut-on wavelength makes it suitable for applications that require the detection of longer infrared wavelengths.

The filter's coating is another crucial aspect of its design. Both the front and back surfaces of the filter are coated with edm 33-971, a specific coating type that enhances the filter's performance and durability.

In terms of availability, the filter's weblink status is valid and it is currently in stock, making it readily available for immediate use. For more detailed information, users can refer to the provided weblink.