| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an optical device that can stably correct the displacement of the optical axis.SOLUTION: An illumination optical system 10 of a projector being an optical device includes a light source device 1 comprising a discharge lamp 11 and a reflector 12 reflecting the light radiated from the discharge lamp 11 and emits the reflected light in a fixed direction. Into the path of the light emitted from the reflected 12, a cylindrical lens 9 (optical lens) can be inserted for correcting the displacement of the optical path resulting from the displacement of a light-emitting position due to a change in the lighting attitude of the discharge lamp 11.</p> |
