With the diffusion of multimedia technology, the highest precision has come to be required in thin film technology for the manufacture of semiconductors, displays, memory media and other electronic parts.
In response to this demand, Okamoto makes high-quality multilayer thin film using vacuum evaporation and other cutting-edge technologies.

When materials with different refraction rates are coated with a reflector mirror, the interference effect of the multilayer film permits to reflect visible light but not infrared rays. As a result, the reflected light does not heat the object, and is thus referred to as "cold light".

Our multilayer thin film is used for these cold light mirrors, which have various applications, such as the lighting in stores, dental mirrors, and surgery lights. It is also increasingly being used in reflectors for projectors.