LASER DEVICE, IGNITION SYSTEM, AND INTERNAL COMBUSTION ENGINE

摘要

A laser device (200) is provided including a light source (201) configured to emit light, a laser resonator (206) which the light emitted from the light source (201) enters, a first optical element (207a) configured to increase a divergence angle of the light emitted from the laser resonator (206), a second optical element (207b) configured to collimate the light whose divergence angle is increased by the first optical element (207a), and a third optical element (207c) configured to collect and condense the light collimated by the second optical element (207b).