| 摘要 |
PROBLEM TO BE SOLVED: To adjust the intervals between plural light spots on a medium using a simple constitution. SOLUTION: Diverging luminous fluxes from light emitting points 1a and 1b of a laser light source 2 are made into parallel luminous fluxes by a collimating lens 3. The fluxes are passed through an afocal optical system 4 which varies an angular magnification, deflected to the perpendicular direction to the plane of the figure by a deflector 5 and image formed on a photosensitive drum 7 as two light spots Sa and Sb by an image forming lens 6. An interval h of the two luminous fluxes is adjusted by varying the angular magnification of the system. |
