Abstract:
A projection light source device according to the present disclosure includes a light source, and a collimating lens that substantially collimates light emitted from the light source, an intermediate diffusion plate that diffuses the emitted light of the collimating lens, and an emission surface diffusion plate that has a weaker diffusibility than the intermediate diffusion plate and diffuses the emitted light of the intermediate diffusion plate.
Abstract:
To easily increase display quality of light even in a case of a long light guide body. Depth h1 of a first dot (106) is larger than depth h2 of a second dot (108) in the vicinity of a light source, and, as a location comes closer to an end on an opposite side to the light source, depth h1 of the first dot (106) is reduced, and depth h2 of the second dot (108) is increased. Therefore, it is possible to easily increase display quality of light even in a case of a long light guide body.
Abstract:
An illumination apparatus includes an LED, a first lens unit provided above the LED and a cylindrical lens provided above the first lens unit. The first lens unit receives light from the LED and emits the light toward the cylindrical lens. The cylindrical lens emits the light to the outside.