OPTICAL FILTER, FILTER SET FOR FLUORESCENCE ANALYSIS AND FLUORESCENCE MEASURING DEVICE USING THIS OPTICAL FILTER

摘要

PROBLEM TO BE SOLVED: To obtain a required reflectance with a fewer number of layers by increasing the width of a transmission area of a filter having discontinuous two transmission areas and two reflection areas on the spectrum.;SOLUTION: An optical filter comprises: a substrate that is transparent in a wavelength area to be used; a transmission filter that is formed on one surface of the substrate and has a layered structure of successively and alternately deposited high refractive index layers and low refractive index layers, in which one of a shorter wavelength side and a longer wavelength side of a predetermined wavelength is rendered into a transmission area and the other area is rendered into a reflection area; and a notch filter that is formed on the other surface of the substrate, has a layered structure of successively and alternately deposited high refractive index layers and low refractive index layers and has a reflection area in a wavelength area distant from the above predetermined wavelength and within the transmission area of the transmission filter. Thus, the obtained filter has discontinuous two transmission areas and two reflection regions in the spectrum.;COPYRIGHT: (C)2009,JPO&INPIT