Light emission device and illumination device

A light emission device, comprising:

• a light source that emits an excitation light beam;
• a light deflector that deflects the excitation light beam;
• a wavelength converter that receives and converts the excitation light beam deflected by the light deflector to wavelength-converted light of a different wavelength, and emits the wavelength-converted light;
• and
• a light concentration section that focuses the excitation light beam on the wavelength converter, wherein
• the light concentration section includes a first optical system disposed between the light source and the light deflector, and a second optical system disposed between the light deflector and the wavelength converter, and
• in the second optical system, a focal length of an Ay-axis is shorter than a focal length of an Ax-axis,
• where the Ax-axis is defined as an axis that has a lowest beam parameter product of the excitation light beam, and the Ay-axis is defined as an axis orthogonal to the Ax-axis in a cross section perpendicular to a propagation direction of the excitation light beam.