Research And Preparation Near Infrared Cut Filter

The Near Infrared Filter is widely used in military affairs, digital figure, optical holography and photoelectric technology at present. So it has both wide market and foreground. Especialy, the IR-cut filter is indispensably important part of digital produces. And its capability affect the quality of digital image straightway.From introducing its function in digital figure produces and theory. This paper fetch out researchful intention and significance about the Infrared-cut Filter. In order to produce IR-cut filter with large quantity and high quality, we need excellent film design and perfect production technology. Under existing specific production condition this paper discuss emphatically that how to select suitable material according to the property of material and the application condition of film, by related theory. And compute the real refractive index of material. As emphasis, the paper introduces coating design, theoretical analysis for the thickness uniformity distribution law, half-wave hole elimination, tooling, deposition process ,At the same time, we discuss for the factors that affect film optical stability, screen the major factor key analysis that affects optical stability, and get the method of solving this problem eventually.