Patent ID: 6757089
Filing Date: 2004-06-29
Classification: G02B

Abstract:
An optical scanning device comprising:a light source; a coupling optical system coupling a light beam projected from said light source; a deflection mirror; a linear image optical system forming said light beam from said coupling optical system into a linear image in a vicinity of the deflection mirror; the deflection mirror reflectively deflecting said light beam from said linear image optical system by performing a sine-wave oscillation; and a scanning optical system composed of a scanning lens causing said light beam reflectively deflected by said deflection mirror to scan a scanned surface at a substantially constant velocity, wherein the following conditional expression is fulfilled: 0.4where: &PHgr;0 is an amplitude angle of said sine-wave oscillation of said deflection mirror, the amplitude angle being represented by degrees; and &PHgr;max is a maximum rotational angle of said deflection mirror corresponding to an effective write width, the maximum rotational angle being represented by degrees.