| 摘要 |
A driving apparatus for a light source is provided with a light generating unit including a light source which emits a light component polarized in a first predetermined direction and another light component polarized in a second, perpendicular direction. The first and second light components are emitted in amounts which vary depending on the total emitted light output. A light splitter is provided for splitting the two polarized components in different splitting ratios into first and second light paths. A photodetector detects the light intensity in the first light path, and a control unit controls the light generating unit so as to maintain the light intensity in the second light path at a predetermined state based on the detection output of the photodetector.
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