Illuminating device and projection type image display unit

An illuminating device, comprising:

• a light source formed by arranging a plurality of laser diodes that are solid light-emitting elements;
• an integrating means for integrating and guiding light emitted from said laser diodes to an object to be illuminated, and
• a phase-shift means for rendering phases of light emitted from said laser diodes non-uniform one another.

An illuminating device, comprising:

• a light source formed by arranging a plurality of solid light-emitting elements;
• and
• an integrating means for receiving light emitted from each solid light-emitting element, and integrating and guiding each of the lights received at a plurality of portions on a light receiving area to an object to be illuminated.

An illuminating device, comprising:

• a light source formed by arranging a plurality of solid light-emitting elements each of which has different light-emitting intensity distribution;
• and
• an integrating means for integrating and guiding light emitted from each solid light-emitting element to an object to be illuminated.

An illuminating device, comprising,

• a light source formed by arranging a plurality of solid light-emitting elements, and
• an integrating means for integrating and guiding light emitted from each solid light-emitting element to an object to be illuminated in respectively different condensing patterns.

An illuminating device, wherein a plurality of solid light-emitting elements are three-dimensionally arranged in a mirror surface cylinder, one surface of which is a light-exit surface and inner sides of other surfaces of which are reflective surfaces, and light emitted from said solid light-emitting elements is integrated by said reflective surfaces and given off from said light-exit surface.

An illuminating device, comprising a diffraction optical element portions having a collimating function or a condensing function on a light-emission side of a solid light-emitting element.

An illuminating device, comprising a hologram optical element portion having a collimating function or a condensing function on a light-emission side of a solid light-emitting element.

An illuminating device, wherein a plurality of solid light-emitting elements are two-dimensionally or three-dimensionally arranged, and a polarization conversion element is provided on a light-emission side of each solid light-emitting element.