69-901 25.2 x 35.6 mm Dichroic Longpass Filter; t=1.05mm 600nm

The 69-901 is a Dichroic Longpass Filter, measuring 25.2 x 35.6 mm with a thickness of 1.05mm, sourced from the renowned optical vendor, Edmund Optics. This filter is designed to transmit light at wavelengths above 600nm, making it ideal for applications that require the separation of longer wavelengths from shorter ones.

The filter is made from UVFS Mal-1965 material, a common choice for optical components due to its excellent optical properties. It features a rectangular base shape, a standard in the industry for its ease of integration into various optical systems. The coating on both the front and back surfaces is EDM 69-868, a broadband antireflection coating that minimizes surface reflections and improves transmission.

The physical data of the filter indicates a cut-on wavelength of 600nm, meaning it starts to transmit light at this wavelength and above. The cut-off wavelength is 0nm, indicating that it transmits all wavelengths below 600nm. This makes it a longpass filter, allowing longer wavelengths to pass through while blocking shorter ones.

The filter is designed in the shape of a thin lens, suggesting it may have some focusing properties. However, this should be confirmed with the vendor or through further specifications. The filter is currently in stock and available for immediate purchase through the Edmund Optics website.