66-251 50 x 50 mm N-BK7 45 deg Reflective Cyan Dichroic Filter; t=4 mm 400-725nm

The 66-251 is a 50 x 50 mm dichroic filter with a 45-degree angle of incidence, designed for use in optical systems that require cyan reflection and transmission in the specified wavelength range. Sourced from Edmund Optics, this filter is made from N-BK7 Schott glass, a popular choice for its high homogeneity and excellent optical transmission.

The filter features a custom coating, denoted as EDM 66-242, on both the front and back surfaces. This coating is designed to reflect cyan light while transmitting other wavelengths, making it suitable for applications such as color separation, beam combining, or laser pulse compression. The specified wavelength range for this filter is 400-725 nm, with a peak wavelength at 588 nm.

The filter's geometry includes a thickness of 4 mm, which contributes to its durability and stability in optical systems. The rectangular shape, with a width of 50 mm and a height of 50 mm, allows for versatile integration into various optical setups.

Please note that the cut-on wavelength is 0 nm, and the cut-off wavelength is 590 nm, providing a clear understanding of the filter's transmission properties. The filter is currently in stock and available for purchase through the provided weblink.