PIGMENT COMPOSITIONS, FILMS, OPTICAL LENSES, AND OPTICAL WAVEGUIDES FOR USE IN OPTICAL LENSES FOR INFRARED SENSORS OR INFRARED COMMUNICATION DEVICES OR FOR USE IN OPTICAL WAVEGUIDES FOR INFRARED SENSORS OR INFRARED COMMUNICATION DEVICES

To provide a pigment composition with a high refractive index and superior transparency, heat resistance, and light resistance to be used in high-refractive index materials for use in optical lenses or optical waveguides for infrared sensors or infrared communication devices using 900-1600 nm light rays.SOLUTION: A pigment composition for use in optical lenses or optical waveguides for infrared sensors or infrared communication devices is provided, the composition comprising a pigment, resin and dispersant, and having a refractive index of 1.7 or greater at 23°C and 940-nm wavelength. When a film with a thickness of 1.0 μm is formed, the composition exhibits a maximum light absorbance of 1.0 or greater in a wavelength range of 780-870 nm and a light absorbance of less than 0.3 at 910 nm wavelength. The pigment is an organic pigment having a phthalocyanine structure.SELECTED DRAWING: None 【課題】本発明は、９００～１６００ｎｍの光線を用いた赤外線センサ又は赤外線通信機器用の光学レンズ又は光導波路に用いる高屈折率材料の用途において、高屈折率であり、透明性、耐熱性、及び耐光性に優れた顔料組成物を提供することを目的とする。【解決手段】赤外線センサ又は赤外線通信機器用の光学レンズ又は光導波路に用いる顔料組成物であって、顔料、樹脂、及び分散剤を含有し、２３℃、波長９４０ｎｍにおける屈折率が１．７以上であり、膜厚１．０μｍの膜を形成した際に、７８０～８７０ｎｍにおける吸光度の最大値が１．０以上であり、９１０ｎｍにおける吸光度が０．３未満であり、前記顔料が、フタロシアニン構造を有する有機顔料である、顔料組成物。【選択図】なし