The 12-421 is a 25.4mm diameter dielectric mirror, specifically designed for ultrafast applications within the 725-1000nm wavelength range. This mirror is sourced from the reputable vendor, Edmund Optics, and is currently in stock with a valid web link provided for easy accessibility and purchasing.
The mirror's geometry is circular with a thickness of 6.35mm, constructed from fused silica (mal-1965) as its material ID. The coating on the front surface is EDM DCURV1242012421, which is specifically designed for ultrafast applications.
The mirror's design is that of a thin lens, which is often used in optical systems to reduce spherical aberration and improve image quality. This mirror is part of the chirped mirror family, which are designed to have a varying group delay dispersion (GDD) across a broad spectrum. This is particularly useful in ultrafast laser systems where controlling the dispersion is crucial for maintaining the short pulse duration.