Abstract: An information processing system 10 comprising a plurality of information processing apparatuses 300, a management server 100, and a plurality of terminals 200, wherein: the management server 100 includes a connection management table 125, and an address notification unit 110 for receiving an apparatus use assignment request from the terminal 200, identifying an address of the corresponding information processing apparatus 300 by checking stored information of an authentication media 50 against the connection management table 125, and notifying the identified address to the terminal 200; the terminal 200 includes an authentication information obtaining unit 210 for obtaining the stored information of the authentication media 50 through a reader 60 for the authentication media 50, and storing the obtained information in an appropriate RAM 203, a management server address storage unit 211 for storing an address of the management server 100, an apparatus use assignment request sending unit 212 for sending a requ

Abstract: An optical scanning apparatus includes: a light source for emitting a laser light ray; a cylinder lens for converting the laser light ray into a first convergent light ray that converges only in a sub-scanning direction and remains unchanged in a main scanning direction; a deflection unit for deflecting the first convergent light ray from the cylinder lens; a focusing unit for converting the deflected light ray into a second convergent light ray that converges in the main scanning direction, and for focusing the second convergent light ray on a scanned surface as a light spot; an aperture unit, arranged between the light source and the deflection unit, for blocking an outer peripheral portion of the laser light ray and for restricting a width of the laser light ray in the sub-scanning direction to a first width of an aperture of the aperture unit; and an adjusting unit for adjusting the first width of the aperture of the aperture unit so as to eliminate a deviation of the diameter of the light spot on the sca

Abstract: An optical scanner having a deflecting device for reflecting and deflecting a laser beam issued from a light source device with a reflective surface thereof, and image forming optics for focusing the deflected laser beam onto a target surface to form a beam spot. A first aperture is interposed between the light source device and the deflecting device for correcting the diameter of the beam spot to be formed on the target surface. A second aperture is located on an optical axis between the first aperture and the target surface for intercepting, at least in a direction corresponding to subscanning, part of the light diffracted by the first aperture which lies outwardly of the first minimums.

Abstract: An optical scanner has a light source device; a lens for converging a laser beam emitted from the light source device; a deflector having a mirror face which is integrally formed with the shaft of a scanner motor and is constructed by one convex spherical or cylindrical mirror face having a radius R and approximately arranged in the vicinity of a center of rotation of the shaft of the scanner motor; and a scanning face scanned by a light beam deflected by the deflector. The optical scanner satisfies a predetermined relation with respect to the radius R when a distance L.sub.O from a deflecting point to the scanning face at an angle of rotation of the deflector set to zero is equal to a distance L from the deflecting point to the scanning face at the angle of rotation of the deflector set to .theta.. The predetermined relation is provided by the following formula:R={(1/cos.theta.)+cos.theta./(1+cos.theta.)-1}L.sub.oThe light source device uses an element for emitting two or more light beams.