Where to Buy Cold Mirrors

A cold mirror is a specialized longpass filter, an optical mirror which is designed to reflect shorter wavelengths of light at a 45° angle of incidence while transmitting undesired heat (infrared radiation).

Shanghai Optics is a custom optics manufacturer with over 55 years of optics manufacturing experience. Our cold mirrors are perfect for applications that require high reflectance in the visible spectrum and excellent transmission in the infrared. These cold mirrors are manufactured using a special proprietary all dielectric coating technique that yields the most durable commercially available product. Our cold mirrors will pass Mil. C-675, snap tape tests and are capable of operation at temperatures as high as 600 °C. They will also operate and survive in extreme humidity environments. Cold mirrors are available from stock in one inch and two inch diameter round or one inch, two inch and four inch square configurations. Larger sheets are also available and may be cut into custom sizes.

We offer on-demand fabrication of cold mirrors. They can separate visible from IR light and have a SiO₂ protective layer. We can provide all shapes and dimensions.

Edmund Optics offers different kinds of cold mirrors, including versions with 0° and 45° angle of incidence and high performance versions with multi-layer dielectric coatings.

See us at SPS Italia 2024 in Parma, Italy, May 28–30 (booth H069, hall 5) and Optics and Photonics Days 2024 in Helsinki, Finland, May 28–30 (booth 12)!

Knight Optical offers stock cold mirrors which reflect visible wavelengths whilst transmitting NIR light. These mirrors can be cut to custom dimensions to meet our customers’ requirements.