Patent attributes
A light emitting apparatus includes a light emitting unit. The light emitting unit includes a light source, a collimator lens, and an optical element that spreads light transmitted through the collimator lens in a direction corresponding to a width direction. The optical element has a plurality of lens groups arranged in a first direction (stacking direction), each of the plurality of lens groups has a plurality of small lenses arranged in a second direction orthogonal to the first direction and crossing an optical axis, each of the plurality of small lenses is formed to spread entering light in a direction corresponding to the width direction so that the lights spread by the small lenses adjacent in a second direction are superimposed, and the plurality of lens groups have the small lenses with the small lenses adjacent in the first direction and the second direction in different sizes from each other.
