Abstract: A wavelength conversion plate includes a conversion region and a reflection region on a base surface. The conversion region includes a wavelength conversion member configured to receive excitation light and generate a color different from a color of the excitation light. The reflection region is configured to reflect the excitation light. The reflection region includes a transmissive diffusion surface, a transmissive layer, and a reflection surface. The transmissive diffusion surface is configured to diffuse the excitation light. The transmissive layer is configured to transmit the excitation light. The reflection surface is configured to reflect the excitation light. The transmissive diffusion surface is in a position separate from a surface closer to the base surface, of the wavelength conversion member, toward a direction from which the excitation light is incident.

Abstract: A light-source device includes an excitation light source, an optical member, and a wavelength converter. The excitation light source is configured to emit first color light. The optical member has a reflecting surface configured to reflect the first color light emitted from the excitation light source. The wavelength converter includes a wavelength conversion member on which the first color light reflected by the optical member is incident. The wavelength conversion member is configured to convert at least part of the first color light into second color light having a wavelength different from a wavelength of the first color light and emit the second color light. A center of the first color light on the reflecting surface of the optical member does not intersect with a light flux of the first color light emitted from the wavelength converter.

Abstract: A vibration damping apparatus including: a plurality of tubular vibration-damping devices each including an inner shaft member and an outer tube member connected by a connecting rubber elastic body; and an attachment member to which the tubular vibration-damping devices are separately attached on opposite sides thereof so as to be linked to each other so that at least one tubular vibration-damping device is arranged on each side of the attachment member. The tubular vibration-damping devices attached on the opposite sides of the attachment member are arranged so as to be remote from each other in an axial direction. Axial directions of the tubular vibration-damping devices attached on the opposite sides of the attachment member incline relative to each other.