Abstract: The display device of the present invention includes, in the following order toward a viewer: a display panel; a semi-transparent mirror; a lens; a Pancharatnam-Berry lens configured to cause one-handed circularly polarized light incident thereon that is left-handed circularly polarized light or right-handed circularly polarized light to converge while causing opposite-handed circularly polarized light incident thereon to diverge; and a circularly polarized light-selective reflector, a circularly polarized light-selective reflector side surface of the lens having a planar shape.

Abstract: The display device of the present invention includes, in the following order toward a viewer: a display panel; a semi-transparent mirror; a Pancharatnam-Berry lens configured to cause one-handed circularly polarized light incident thereon that is left-handed circularly polarized light or right-handed circularly polarized light to converge while causing opposite-handed circularly polarized light incident thereon to diverge; and a circularly polarized light-selective reflector.

Abstract: [Object] Collection efficiency of a reflector that reflects a converted beam, which is converted from a pump beam by a phosphor, and projects the resultant as a projection beam is increased. [Solution] An optical member (4) of a light source unit (1) deflects a pump beam (PB) so that a first angle of incidence (?1) of a pump beam (PBX) relative to a surface of a phosphor (3) is larger than a second angle of incidence (?2) of the pump beam (PB), which is incident on the optical member (4), relative to the surface of the phosphor (3).

Abstract: A light source unit provides enhanced control of a colour shift of white light reflected by a retro-reflector. The light source unit includes a pump light source, which emits laser pump light, a phosphor, which converts the laser pump light into white light, a retro-reflector, which has an output aperture that allows emission of part of the white light, the retro-reflector reflecting another part of the white light back to the phosphor, and scattering particles, which are adjusted to increase a blue light ratio of the white light.

Abstract: [Object] Collection efficiency of a reflector that reflects a converted beam, which is converted from a pump beam by a phosphor, and projects the resultant as a projection beam is increased. [Solution] An optical member (4) of a light source unit (1) deflects a pump beam (PB) so that a first angle of incidence (?l) of a pump beam (PBX) relative to a surface of a phosphor (3) is larger than a second angle of incidence (a2) of the pump beam (PB), which is incident on the optical member (4), relative to the surface of the phosphor (3).

Abstract: [Object] To control a colour shift of white light reflected by a retro-reflector. [Solution] A light source unit (1) includes a pump light source (2), which emits laser pump light (11), a phosphor (3), which converts the laser pump light (11) into white light (12), a retro-reflector (4), which has an output aperture (5) that allows emission of part of the white light (12), the retro-reflector (4) reflecting another part of the white light (12) back to the phosphor (3), and scattering particles (7), which are adjusted to increase a blue light ratio of the white light (12).