There is provided an electron emitting device, including a substrate, a pair of electrodes formed on the substrate and spaced apart from each other, a pair of electrically conductive layers formed on the electrodes, respectively, a distance between the electrically conductive layers being shorter than a distance between the electrodes, and an electron emitting layer formed between the electrically conductive layers and containing carbon and tin.

 
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> Light intensity ratio adjustment filter for an interferometer, interferometer, and light interference measurement method

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