Abstract: The present disclosure relates to a lens optical system, a light receiving device, and a distance measuring system capable of providing a highly efficient lens optical system while achieving reduction in size and height. A lens optical system includes, in order from an object side, a first lens group having a negative refractive power, and a second lens group having a positive refractive power, in which the first lens group includes a first lens having a negative refractive power, the second lens group includes a second lens having a positive or negative refractive power, a third lens having a positive refractive power, and a fourth lens having a positive refractive power, and the lens optical system has a positive refractive power as a whole. The present disclosure can be applied to, for example, a distance measuring system that detects a distance to a subject in a depth direction, and the like.

Abstract: An object of the present invention is to provide a light source lens that makes it possible to improve unevenness in a luminance distribution, an illumination unit, and a display unit. A light source lens (1) according to the present disclosure includes an incident surface on which light from a light-emitting device is incident, and an exit surface (20) that has a diffusing function at a center part (21) for light incident through the incident surface as well as a light-condensing function at at least a portion of an intermediate part (22) and a peripheral part (23) for the light incident through the incident surface.

Abstract: Provided is a light source device including a laser light source group including at least one multi-emitter laser light source and at least one non-multi-emitter laser light source that emits a colored light different from that of the multi-emitter laser light source, a collimator lens having at least one cylindrical surface that adjusts a laser light emitted from the at least one multi-emitter laser light source, and a light guide unit that performs color synthesis of a laser light emitted from the at least one multi-emitter laser light source and having passed through the cylindrical surface and a laser light emitted from the at least one non-multi-emitter laser light source.

Abstract: An object of the present invention is to provide a light source lens that makes it possible to improve unevenness in a luminance distribution, an illumination unit, and a display unit. A light source lens (1) according to the present disclosure includes an incident surface on which light from a light-emitting device is incident, and an exit surface (20) that has a diffusing function at a center part (21) for light incident through the incident surface as well as a light-condensing function at at least a portion of an intermediate part (22) and a peripheral part (23) for the light incident through the incident surface.

Abstract: An object of the present invention is to provide a light source lens that makes it possible to improve unevenness in a luminance distribution, an illumination unit, and a display unit. A light source lens (1) according to the present disclosure includes an incident surface on which light from a light-emitting device is incident, and an exit surface (20) that has a diffusing function at a center part (21) for light incident through the incident surface as well as a light-condensing function at at least a portion of an intermediate part (22) and a peripheral part (23) for the light incident through the incident surface.

Abstract: It is an object to improve uniformity of a laser light generated by a light source device including a multi-emitter type laser light source. The present technology provides a light source device including a laser light source group including at least one multi-emitter laser light source (111R-1 and the like) and at least one non-multi-emitter laser light source (111B-1 and the like) that emits a colored light different from that of the multi-emitter laser light source, a collimator lens (112R-1 and the like) having at least one cylindrical surface that adjusts a laser light emitted from the at least one multi-emitter laser light source (111R-1 and the like), and a light guide unit (113, 114, and the like) that performs color synthesis of a laser light emitted from the at least one multi-emitter laser light source (111R-1 and the like) and having passed through the cylindrical surface and a laser light emitted from the at least one non-multi-emitter laser light source (111B-1 and the like).

Abstract: An object of the present invention is to provide a light source lens that makes it possible to improve unevenness in a luminance distribution, an illumination unit, and a display unit. A light source lens (1) according to the present disclosure includes an incident surface on which light from a light-emitting device is incident, and an exit surface (20) that has a diffusing function at a center part (21) for light incident through the incident surface as well as a light-condensing function at at least a portion of an intermediate part (22) and a peripheral part (23) for the light incident through the incident surface.

Abstract: An object of the present invention is to provide a light source lens that makes it possible to improve unevenness in a luminance distribution, an illumination unit, and a display unit. A light source lens (1) according to the present disclosure includes an incident surface on which light from a light-emitting device is incident, and an exit surface (20) that has a diffusing function at a center part (21) for light incident through the incident surface as well as a light-condensing function at at least a portion of an intermediate part (22) and a peripheral part (23) for the light incident through the incident surface.

Abstract: An object of the present invention is to provide a light source lens that makes it possible to improve unevenness in a luminance distribution, an illumination unit, and a display unit. A light source lens (1) according to the present disclosure includes an incident surface on which light from a light-emitting device is incident, and an exit surface (20) that has a diffusing function at a center part (21) for light incident through the incident surface as well as a light-condensing function at at least a portion of an intermediate part (22) and a peripheral part (23) for the light incident through the incident surface.