Patent ID: 8212912

Claim:
An imaging device for taking an image of an object, said imaging device comprising: a lens array including a plurality of lenses; an imaging element provided at a predetermined distance from said lens array and having a plurality of imaging areas respectively corresponding to said plurality of lenses; a light-shielding wall which partitions a space between said lens array and said imaging element so as to prevent light entering each of said plurality of lenses from reaching said plurality of imaging areas different from a corresponding one of said plurality of imaging areas; an imaging signal input unit configured to generate an imaging signal by digitalizing an electric signal provided by said imaging element; and a temperature estimation unit configured to calculate, from the imaging signal, a length of an image of said light-shielding wall projected on an imaging plane of said imaging element, and to estimate a first temperature using the calculated length of the image of said light-shielding wall.