Dual-channel filter and method for preparing dual-channel filter by spin-coating blue dye
A dual-channel filter and blue dye technology, which is applied in the field of dual-channel filters and spin-coated blue dyes to prepare dual-channel filters, can solve the problem of poor rigidity of blue plastic substrates, substrate deformation, and inability to use dual-channel filters And other issues
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[0054] figure 1 is a schematic diagram of comparing the optical characteristics of a single-channel filter and a dual-channel filter, where (a) is the optical characteristic of the single-channel filter, and (b) is the optical characteristic of the dual-channel filter. The general requirements of a single-channel filter are as follows: transmit visible light at 420-650nm, and cut off near-infrared light at 700-1100nm. Dual-channel filters generally require the following characteristics: transmit 400-650nm visible light and 940nm (or 850nm) infrared light, and cut off 700-1200nm infrared light except for the 940nm (or 850nm) passband. The important differences between the two filters are: (1) from a single channel that transmits 420-650nm to a dual-channel that transmits 400-650nm and 940nm (or 850nm). Purpose, wherein the visible light channel obtains color images, and the infrared light channel obtains black and white images; (2) The visible light transmission band is extend...
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