Hot Mirrors

COE Optics' hot mirror is a specialized dielectric mirror, a dichroic filter, often employed to protect optical systems by reflecting infrared light back into a light source, while allowing visible light to pass. Hot mirrors can be designed to be inserted into the optical system at an incidence angle varying between zero and 45 degrees, and are useful in a variety of applications where the buildup of waste heat can damage components or adversely affect spectral characteristics of the illumination source. Wavelengths reflected by an infrared hot mirror range from about 750 to 1250 nanometers. By transmitting visible light wavelengths while reflecting infrared, hot mirrors can also serve as dichromatic beam splitters for specialized applications in fluorescence microscopy or optical eye tracking.

COE Optics hot Mirrors are mainly working in the conditions with resistance to damage from ambient temperatures of -45°C to +232°C. Hot mirrors are ideal for projection systems, where heat build-up can lead to system damage. Cold mirrors can be made of BOROFLOAT® glass, Corning Pyrex glass, Schott D 263, etc. Cold Mirrors can be cut to the desired size for any application.

Please talk with our sales team for any applications of hot mirrors.

Important Reminder: When using high power illumination, forced air cooling is recommended.

Hot mirrors are crucial in many projections and illumination systems where high levels of heat can quickly damage sensitive components. Hot mirrors are specially coated to transmit visible light while reflecting the NIR, a major attributor to heat generation. By using a hot mirror, heat levels are limited with minimum impact on the overall system performance.