1. An image capturing device, comprising: an optical system configured to focus light from an object to generate optical information; a first filter provided near a diaphragm position of the optical system, the first filter including a plurality of filters respectively having different spectral characteristics, wherein each of the filters of the first filter is arranged circumferentially about an optical axis of the optical system and shares a border with two other filters of the first filter; a sensor configured to convert the optical information of the object to electronic data, the sensor being provided with a second filter, the second filter including a plurality of filters respectively having different spectral characteristics, which are different than the spectral characteristics of the first filter; and a lens array provided between the optical system and the sensor and configured to have a plurality of lenses being arranged substantially parallel to a two-dimensional surface of the sensor, wherein the light from the object passes through the respective filters of the first filter and the respective filters of the second filter to simultaneously form a plurality of types of spectral images of the object on an image plane of the sensor; and at least one filter of the first filter is a band-pass filter that allows light to be transmitted through a peak value, the peak value being different from a peak value of each of the plurality of filters of the second filter.