Lens array apparatus

A lens array apparatus consisting of:

• a lens array including a plurality of lenses formed to be arrayed in a predetermined array direction and formed integrally to have a predetermined thickness in a thickness direction that is perpendicular to the array direction, the lens array emitting light, that has entered the plurality of lenses and corresponds to each lens, from each lens towards a predetermined converging point;
• a light-emitting device that is disposed in a position facing the lens array in the thickness direction of the lenses and on which a plurality of light-emitting elements of a same number as a number of lenses are formed, the light-emitting elements respectively emitting light corresponding to each lens towards the plurality of lenses;
• and
• a same number of plurality of optical fibers as a number of the lenses disposed in a position facing a side of the lens array opposing the light emitting device in the thickness direction of the lenses so that light emitted from each of the lenses enters each of the optical fibers, wherein
• each of the plurality of lenses has
• a first lens surface which is on a light-entering side facing the light-emitting device, and
• a second lens surface which is on a light-exiting side opposing the light-entering side and faces each of the optical fibers;
• and
• as a predetermined angle of gradient in relation to the thickness direction of each lens, an exiting direction of light from each of the plurality of lenses is at an angle of gradient allowing a converging point of the light emitted from each lens to be positioned on a predetermined straight line that corresponds to each lens and is parallel in the thickness direction of the lens, under a plurality of different ambient temperatures.