This is a 89-450 25.4mm Dia. Nd:YAG IBS Low Loss Laser Line Mirror, a high-quality optical component designed for use in laser systems operating in the 343-355nm wavelength range. The mirror is sourced from the reputable vendor, Edmund Optics, and is currently in stock, as indicated by its weblink status.
The mirror is a Dielectric Mirror, a type of mirror that utilizes multiple layers of thin film coatings to reflect light at specific wavelengths. This particular mirror is designed for use with Nd:YAG lasers, a common type of solid-state laser. The low loss coating ensures minimal absorption of the laser beam, maximizing the efficiency of the system.
The mirror has a base shape of Circular, with a diameter of 25.4mm and a thickness of 5mm. It is made from fused silica, a material with a high damage threshold and excellent optical properties, identified in the item data as "fused sil mal-1965".
The coating on the front surface of the mirror is "edm dcurv8945045aoi", a specific coating designed for use with this type of mirror and laser system. The mirror is shaped as a Thin Lens, which may have specific implications for its use in certain optical systems.