Abstract: An optical recording apparatus includes an optical system, a photosensitive drum and a rotational mechanism. Multibeam laser light is focused through the optical system to form an image as a column of image-forming beam spots on the photosensitive drum. The column of image-forming beam spots is arranged obliquely on the photosensitive drum and scanned to perform optical recording. The optical system includes a resolution converting lens system which is detachably attached into the optical system. The rotating mechanism adjusts rotation of the resolution converting lens system around an optical axis thereof. The resolution converting lens system is rotated by the rotating mechanism to change of resolution of the recording image. The resolution converting lens system is attached into and detached from the optical system to change of resolution of the recording image.

Abstract: An optical recording apparatus includes a light-transmitting diffraction grating at a front focus of an imaging lens and a multi-channel acousto-optic modulator provided at a back focus of the lens. An angle formed between a plane formed by diffracted beams emerging from the lens and a revolution surface of a rotating polygonal mirror is set to be equal to an angle at which the beam diffracted by the multi-channel acousto-optic modulator emerges to be incident on the mirror. The diffracted beams are incident on the imaging lens to satisfy a predetermined condition.

Abstract: An optical recording apparatus includes an optical system, a photosensitive drum and a rotational mechanism. Multibeam laser light is focused through the optical system to form an image as a column of image-forming beam spots on the photosensitive drum. The column of image-forming beam spots is arranged obliquely on the photosensitive drum and scanned to perform optical recording. The optical system includes a resolution converting lens system which is detachably attached into the optical system. The rotating mechanism adjusts rotation of the resolution converting lens system around an optical axis thereof. The resolution converting lens system is rotated by the rotating mechanism to change of resolution of the recording image. The resolution converting lens system is attached into and detached from the optical system to change of resolution of the recording image.

Abstract: An optical recording apparatus in which multi-channel acousto-optic modulator (1-10) is provided on the optical path in such a way that the individual channels thereof are arranged substantially horizontally.

Abstract: A module for an optical fiber receptacle used in an optical scanning device forming a latent image on a photosensitive body by scanning a laser beam emitted from the optical fiber, the efficiency of light use is improved. The module includes a module holder having a semiconductor laser for generating a laser beam, a lens for condensing the laser beam emitted from the semiconductor laser and a lens holder for holding the lens; a flat glass plate arranged on the optical path of the laser beam and fixed in the module holder; an optical fiber fixed onto a surface of the flat glass plate opposite to the surface facing the semiconductor laser through a photo-curing resin. The flat glass plate, the photo-curing resin and the optical fiber are made of materials having approximately equal refractive indexes.

Abstract: In an optical recording apparatus for performing optical recording by guiding a plurality of beams of light from semiconductor lasers into single-mode optical fibers and sweeping the beams of light injected from the optical fibers with a rotary polygonal mirror, a transparent member is closely attached to an end of the optical fibers on a light injecting side.