Application and principle of cold light film in lighting field

Now the quartz halogen lamp is widely used in the field of lighting. It has the advantages of small volume, high luminous efficiency, small light decay, long life and high color rendering index. In particular, "directional reflection tungsten halogen lamp" made of optical thin film technology has been widely used because of its advantages of transmitting infrared light from the light source and directional reflection of visible light. Whether it is industrial lighting (projection lamp, projection lamp, medical lamp, background projection television light source, etc.), commercial lighting (shopping mall, hotel, jewelry, clothing, etc.), or home lighting (decoration), the market prospect is bright. 

The core technology is that the coating technology of cold reflective cup has been successfully applied in an unprecedented way, so that the cold light cup with reflective visible and infrared transmission is obviously advanced. With the coating technology and industry with Chinese characteristics, the cold light cup has great advantages, and its cost performance is in the forefront of the world.

The design principle of the cold light film is to reflect the visible light as high as possible, while the transmitted infrared light, plated on the arc reflecting bowl, makes the reflected light very high, while the infrared radiation heat is greatly reduced, thus reducing the temperature of the beam. The spotlight made by this technology is called cold light lamp. In fact, the cold light film is a kind of broadband reflection film with long wave path. The design principle of the high reflection film and the spectral spectroscopic film can be used as the solution if there is a certain reflection bandwidth in the visible region and a good long wave path. In order to obtain a wide reflection band in the visible region, there are two solutions:

1. Design high reflective film systems with different central wavelengths and connect their high reflective bands to obtain wide high reflective bands.

2. The purpose of the design is to form a film system with a constantly changing central wavelength, so as to obtain a broadband high reflection film.