A plano-concave mirror is an optical element with a concave reflective surface, commonly used to focus light. Its reflective surface faces inward, so when parallel light rays strike the mirror, they are reflected and converge at a common focal point. Plano-concave mirrors are widely applied in optical systems such as telescopes, microscopes, and laser systems.

These mirrors efficiently focus incident light, making them ideal for applications requiring concentrated optical power. They typically exhibit high reflectivity—especially within specific wavelength ranges—ensuring effective light energy transmission with minimal losses. The quality of reflected light depends on the optical treatment of the mirror surface, including coating quality and surface flatness. Unlike lenses, plano-concave mirrors are free from chromatic aberration since they focus light through reflection rather than refraction, providing sharp, dispersion-free images. Due to their smooth and uniform surface, plano-concave mirrors can handle high-power beams. They are characterized by a low thermal expansion coefficient, high damage threshold, excellent mechanical strength, and stable performance.

Download Brochure