Suppression of banding due to vibration in imagers with laser drivers

A system for suppressing banding due to vibration in a laser imager, comprising:

• beam modulation means for modulating a beam including data signal producing means for causing said beam to produce a latent image in accordance with governing equations which relate on/off time and intensity to velocity and frequency of vibration with data desired for reproduction, wherein said beam modulation means displaces said light beam orthogonal to linear scan lines in a manner based on calculating means to suppress development of a regular interstitial pattern at boundaries of adjacent scan lines;
• and
• data signal producing means for defining a combination of amplitude and frequency modulation equations;
• wherein
• said beam modulation means displaces said light beam orthogonally by an amplitude directly related to said amplitude of frequency modulations.

A method for suppressing banding due to vibration in an laser imager, comprising the step of:

• selectively discharging an imaging means including a light source for producing a light beam and scanning means for repeatedly scanning said light beam in parallel and adjacent linear scan lines across an electrophotographic medium, said imaging means further including beam modulation means including a combination of amplitude and frequency modulation equations for causing said beam to produce a latent image in accordance with governing equations which relate on/off time and intensity to velocity and frequency of vibration with data desired for reproduction, wherein said beam modulation means displaces said light beam in a predetermined manner orthogonal to said linear scan lines to suppress development of a regular interstitial pattern at boundaries of adjacent scan lines, wherein said frequency modulation equation which governs said on/off time is t1+e sin(2πft1)/v0+t0, wherein t1 is in terms of nominal on-time t0, e (vibration amplitude), v0 (nominal velocity) and f (vibration frequency) and said combination of amplitude and frequency modulation equations governs said intensity is H3(t)=v(t)/v0, wherein H3(t) controls the level of irradiance;
• and wherein
• said beam modulation means displaces said light beam orthogonally by an amplitude directly related to said amplitude of frequency modulation.