| 摘要 |
A light scanning apparatus (100) includes a light source (1), a deflector (5) configured to deflect a light flux (103) from the light source (1), and an imaging optical system configured to guide the light flux (103) deflected at the deflector (5) onto a scanned surface (7). The imaging optical system consists of a single imaging optical element (6), wherein, on the optical axis of the imaging optical system, the conditions 0.15 ‰¤ T2/Sk ‰¤ 0.3 and 0.03 ‰¤ d/K ‰¤ 0.08 are satisfied. A condition 0.3 ‰¤ B ‰¤ 0.6 is satisfied at a condensing position Y where a scanning angle ¸ is greatest, when the condensing position Y in the main scanning direction on the scanned surface (7) of the light flux (103) deflected at the scanning angle ¸ by the deflector (5) is expressed by Y = (K/B) × tan(B × ¸). |
