| 摘要 |
A light source device comprises a lamp having a bar-shaped luminous body, a lamp housing having lamp supporting portions, a reflective curved interior surface for reflecting light from the lamp and an opening, and a light transmitting plate member which is composed of a lamination structure including a first diffusing plate, a linear Fresnel lens plate on which a plurality of striations are formed to extend in parallel with one another in a direction along the bar-shaped luminous body of the lamp and a second diffusing plate arranged in order, and attached to the lamp housing to be opposite to the reflective curved interior surface with the lamp between for covering the opening.
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