FILTER FOR SELECTIVELY TRANSMISSION VISIBLE RAY AND INFRARED RAY USING ELECTRICAL SIGNAL

摘要

PURPOSE: A filter is provided to improve precision of a color image by being connected to a sensor of time division base and selectively transmitting visible ray or infrared ray according to control of an electric signal. CONSTITUTION: A first filter(501) controls absorption of visible ray by changing molecular arrangement according to control of an electric signal. The first filter is composed of one or more layers including liquid crystal molecule and dye molecule. A second filter(502) controls reflectivity degree of infrared ray by changing reflectivity according to the control of the electric signal. The second filter is composed of a layer including the liquid crystal molecule, and a layer including the polymer molecule. A tunable filter(503) is used as a structure in which the first filter and the second filter are combined.