| 摘要 |
An illumination system (700) is provided. The illumination system (700) divides a light flux emitted from a light source (722) into a plurality of partial light fluxes and causes the plurality of partial light fluxes to be substantially superimposed on an illumination area (80), so as to enable a light-entering face of a specific optical apparatus to be illuminated as the illumination area. The illumination system comprises a light source (722) that has a reflector (724) that emits a convergent light flux, and a dividing and superimposing section (730, 740, 750, 770) that divides the convergent light flux into a plurality of partial light fluxes and causes the plurality of partial light fluxes to be substantially superimposed on the illumination area (80). The illumination system further comprises a light flux contraction section (724, 730, 770) that changes an incident light flux to an emitting light flux, the emitting light flux having a width narrower than the incident light flux. The light flux contraction section has a light condensing function and a light parallelizing function and a function of an afocal optical system, and the reflector has the light condensing function and the dividing and superimposing section has the light parallelizing function. |
