An optical scanning apparatus includes light sources, an aperture having,
and coupling lenses. Numbers of the light sources and the coupling lenses
are equal to each other and the apparatus satisfies an inequality 12.7
<(D.times..beta..sub.0.times.m.sub.0.times.xdpi)/(2.times.NA) <38.1
and an equation .beta..sub.0 =(.beta..sub.+ -.beta..sub.-)/(n-1), wherein
D represents a width of the slit of the aperture, .beta..sub.0 represents
a beam open angle, mo represents a total lateral magnification ratio, dpi
represents a number of dots per inch, NA represents a numerical aperture,
.beta..sub.+ represents a positive open angle, .beta..sub.- represents a
negative open angle, and n represents the number. Further, an image
forming apparatus using this optical scanning apparatus and an image
forming method are provided.
Ein Apparat der optischen Abtastung schließt Lichtquellen, eine Blendenöffnung, die haben, und verbindenobjektive mit ein. Zahlen der Lichtquellen und der Koppelung Objektive sind Gleichgestelltes miteinander und der Apparat erfüllt eine Verschiedenheit 12.7
