Abstract: The present invention aims at providing an optical unit, its manufacturing method, and electrophotographic device that can easily and inexpensively achieve a reliable latent image formation on a photosensitive drum, and can form a high-quality image. To realize the above aims, a lens barrel and a collimating lens are bonded only at a single spot, and the bonding orientation is aligned approximately with a main scanning direction. Thereby displacement of the collimating lens caused by a thermal expansion of the adhesive is restricted to the main scanning direction as adjustable by other components.

Abstract: An image forming apparatus includes a plurality of light sources emitting beams of light, a photoconductor, a scanner for reflecting the beams of light emitted by the light sources to scan the photoconductor periodically, a light detector for receiving the beams of light from the scanner to determine a beam pitch between the beams of light, the light detector being provided in a part of an optical path between the scanner and the photoconductor, a beam shifter for shifting the beams of light incident on the scanner from the light sources, and a controller for operating the beam shifter so that the beam pitch determined by the light detector becomes a predetermined value.

Abstract: An image forming apparatus includes: a plurality of light-emitting elements, each light-emitting element receiving a driving current from a power supply and converting the current into a beam; a plurality of driving elements, each driving element being interposed between the power supply and each light-emitting element and controlling the driving current based on an image signal; and a photoconductor on which the beams from the plurality of light-emitting elements form an image by scanning, wherein each light-emitting element is positioned so immediately adjacent to each driving element that a power leakage factor floating therebetween is reduced, whereby an intensity of the beam is substantially equivalent to the image signal in waveform.

Abstract: A light source package includes a light source, a lens for collimating the light from the light source, and a support member for supporting the light source and the lens so that the optical axis of the lens is set to a desired position relative to the light source. The support member includes a compensating device for compensating the lens for deviation of the optical axis of the lens resulting from a difference in the coefficients of linear thermal expansion between the lens and the support member when the ambient temperature changes.