| 摘要 |
PURPOSE:To give many functions to the device and to make many design changes possible, by making plural beams as a reproducing illumination light incident to the optical scanning device and obtaining plural scanning beams independent of one another through one hologram disc. CONSTITUTION:Two reproducing illumination light beams 5 and 5 are obtained by dividing the beam from one laser light source in a beam splitter or the like or are emitted from two laser light sources independent of each other. Two beams 5 and 6 are diffracted independently by holograms in different positions of one hologram disc 1 and become scanning beams 7 and 8 respectively and are focused on different scanning faces and are scanned by optical systems 9 and 10. Thus, plural functions are given by one hologram and one convex mirror, and many design changes are possible. |
