OPTICAL FIBER ARRAY FOR OPTICAL RECORDING DEVICE AND IMAGE FORMING APPARATUS USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an optical fiber array preventing the deformation of the shape of an emitted beam from the optical fiber array even in the case of propagating a laser beam whose wavelength is≤450 nm through an optical fiber and having a function for restraining influence to be exerted when dust or dirt suspended in the air adheres to an emitting end face.

SOLUTION: As for the optical fiber array for the optical recording device for scanning photosensitive material by modulating a plurality of laser beams to perform scanning, a glass bar whose length (g) and radius T satisfy a condition shown by following expressions is welded on the emitting ends of a plurality of optical fibers. g>π×d02×n/4λand T>T0=d0×(1+(g/X0)2)0.5(provided that d0means the diameter of the light beam emitted from the optical fiber, n means the refractive index of the glass bar andλmeans the wavelength of the light beam, X0=π×d02×n/4λ).

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