Product Profile of Thin Film Coatings

Astro optics pvt. Ltd. An iso 9001 : 2000 certified company manufactures various types of optical components. Thin film coating is one of the most important aspect of the optical industry. An uncoated glass substrate will only reflect or transmit the light as per its refractive index and the angle of incidence. Salient features are as follows:

• Thin film coatings change the amount of light reflected or transmitted through the optics.

• These are very thin layers [of the order of angstroms] of materials coated on to the substrate, hence the term "thin films".

• These can be single layers or multiple layers coated on top of one another to achieve the required reflection / transmission.

• Oxides, fluorides, metals are used for this purpose.

• The evaporation has to be carried out in special coating machines developed for this purpose. The whole process of coating is quite complicated and requires continuous development. The coatings are designed using special software and then stabilized on the coating machine to get performance as per the design.