A light scanning device according to the present invention comprises: a light source (21) for emitting light； a wavefront transmission unit (11) that includes a plurality of cores having a propagation mode such as a single-mode or a few-mode, and transmits light between a first end surface (11a) composed of the end surfaces at one end of the plurality of cores and a second end surface (11b) composed of the end surfaces at the other end of the plurality of cores； a basic wavefront modulation unit (22) which, on an optical path from the light source (21) to the first end surface (11a), performs spatial optical phase modulation of incident light to generate and emit light having a basic wavefront and required to be incident on the first end surface (11a) in order for illumination light having a basic intensity distribution at a position a predetermined distance from the second end surface (11b) of the wavefront transmission unit (11) to be obtained from light emitted from the second end surface (11b) of the wavefront transmission unit (11)； and a two-dimensional intensity distribution control unit (26) which, on the optical path from the light source (21) to the first end surface (11a), changes the basic intensity distribution by emitting light for sending light having a tilt component added to the basic wavefront to the first end surface (11a) of the wavefront transmission unit (11).Un dispositif de balayage lumineux selon la présente invention comprend : une source de lumière (21) destinée à émettre de la lumière ； une unité de transmission de front d'onde (11) qui comprend une pluralité de cœurs ayant un mode de propagation tel qu'un seul mode ou un peu de modes, et transmet la lumière entre une première surface d'extrémité (11a) composée des surfaces d'extrémité à une extrémité de la pluralité de cœurs et une seconde surface d'extrémité (11b) composée des surfaces d'extrémité à l'autre extrémité de la pluralité de cœurs ； une unité de modulation de front d'onde de
