OptoSigma offers the TFAN-20S03-10, a 20 x 20 mm N-BK7 aluminum flat mirror with a thickness of 3mm. This mirror is designed for use at a wavelength of 588nm and features an aluminum coating on the front surface, optimized for 45 degrees angle of incidence (AOI).
The mirror is rectangular in shape, with dimensions of 20 x 20 mm, and is made from N-BK7 Schott glass, a popular choice for its excellent optical properties and high damage threshold. The mirror's thin lens shape and small thickness make it suitable for a wide range of optical applications.
According to the vendor's website, the TFAN-20S03-10 is currently in stock, and more information about this product can be found at https://www.optosigma.com/us_en/aluminum-mirror-bk7-20x20mm-i-10-TFAN-20S03-10.html.