Light measuring device

A light measurement device for measuring light from an observation object, the light measurement device being characterized by being provided with: an imaging lens for transmitting the light and forming a primary image; and a lens array for dispersion, which is disposed downstream of the imaging lens in the direction of travel of the light, and which is formed by arranging a plurality of lenses for dispersion in an array, and which disperses the light having formed the primary image into a plurality of spots after passing through each of the lenses for dispersion. And converting the primary image into a secondary image formed by the plurality of discrete light spots. And a light-receiving element array which is disposed downstream of the discrete lens array in the direction of travel of light and in which a plurality of light-receiving elements are disposed in an array corresponding to the discrete lens array, and in which each of the discrete light spots is received by a light-receiving unit of each of the l