Patent application number | Description | Published |
20080285101 | LIGHT SCANNING DEVICE AND THRUST-DIRECTION FORCE CANCELING METHOD - In a light scanning technique of reflecting and deflecting incident light by a rotary deflector, a technique to reduce adverse effects of a thrust-direction force generated by air resistance received by a reflection surface of the rotary deflector is provided. | 11-20-2008 |
20080297872 | OPTICAL BEAM SCANNING DEVICE, OPTICAL BEAM SCANNING METHOD - There is provided a technique in which in an optical beam scanning device, optical characteristics can be suitably corrected according to a change in environmental temperature. The optical beam scanning device is configured to shape a divergent light from a light source into a light flux having a specified sectional shape by a pre-deflection optical system and to guide the light flux, which is shaped by the pre-deflection optical system | 12-04-2008 |
20080297873 | OPTICAL BEAM SCANNING DEVICE, OPTICAL BEAM SCANNING METHOD - There is provide a technique in which in an optical beam scanning device, optical characteristics can be suitably corrected according to a change in environmental temperature. The optical beam scanning device is configured to shape a divergent light from a light source into a light flux having a specified sectional shape by a pre-deflection optical system | 12-04-2008 |
20090009731 | OPTICAL BEAM SCANNING DEVICE, IMAGE FORMING APPARATUS - To provide a technique that can contribute to improvement of an optical characteristic of an optical beam scanning device while realizing an increase in scanning speed of a light beam. | 01-08-2009 |
20090009839 | OPTICAL BEAM SCANNING DEVICE, IMAGE FORMING APPARATUS - A technique is provided which enables proper correction of optical characteristics in accordance with change in ambient temperature. | 01-08-2009 |
20090009843 | OPTICAL BEAM SCANNING DEVICE, IMAGE FORMING APPARATUS - To provide a technique that can appropriately correct an optical characteristic according to fluctuation in an environmental temperature. | 01-08-2009 |
20090067021 | OPTICAL BEAM SCANNING APPARATUS, OPTICAL BEAM SCANNING METHOD AND IMAGE FORMING APPARATUS - An optical beam scanning apparatus according to the present invention includes a light source, a pre-deflection optical system, a light deflecting device, a post-deflection optical system, a first sensor configured to detect a part of the luminous fluxes deflected by the light deflecting device, one or plural first optical elements configured to be provided in the post-deflection optical system and act on the luminous fluxes deflected by all the deflection surfaces of the light deflecting device; and a second optical element having positive power in the sub-scanning direction configured to be provided in an optical path between any one of the first optical elements and the first sensor and act on the luminous fluxes deflected by all the deflection surfaces of the light deflecting device. | 03-12-2009 |
20090067022 | OPTICAL BEAM SCANNING APPARATUS, OPTICAL BEAM SCANNING METHOD, IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An optical beam scanning apparatus according to the present invention includes a pre-deflection optical system, a post-deflection optical system at least including one or plural first optical elements, plural second optical elements, a first reflection mirror which is provided in optical path between the first optical element and one of the second optical elements and reflects, on a most upstream side of the optical paths, a luminous flux on a most downstream side or a most upstream side in the sub-scanning direction among the plural luminous fluxes, and a second reflection mirror which is provided in optical path between the first optical element and another second optical element and reflects, on an optical path second from a most downstream side of the optical paths, the luminous flux on the most downstream side or the most upstream side in the sub-scanning direction among the plural luminous fluxes. | 03-12-2009 |
20090067023 | OPTICAL BEAM SCANNING APPARATUS, OPTICAL BEAM SCANNING METHOD AND IMAGE FORMING APPARATUS - An optical beam scanning apparatus according to the present invention includes a light source, a pre-deflection optical system, a light deflecting device, a post-deflection optical system configured to at least include one or plural first optical elements which act on the luminous fluxes for all color components, plural second optical elements which respectively act on the luminous fluxes for each of color components, and plural first reflection mirrors that are respectively provided on an upstream side of the plural second optical elements in optical paths and reflect luminous fluxes emitted from the first optical elements, and a position adjusting mechanism configured to adjust positions of the first reflection mirrors. | 03-12-2009 |
20090067024 | OPTICAL BEAM SCANNING APPARATUS, OPTICAL BEAM SCANNING METHOD, IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An optical beam scanning apparatus according to the present invention includes a light source, a pre-deflection optical system, a light deflecting device configured to separate the luminous fluxes in a sub-scanning direction for each of color components and scan the luminous fluxes against a scanning object in the main scanning direction, a post-deflection optical system configured to at least include one or plural first optical elements, plural second optical elements, plural reflection mirrors which are respectively provided on a downstream side of the second optical elements in plural optical paths excluding an optical path in which any one of the second optical elements is included and reflect luminous fluxes emitted from the second optical elements, and a position adjusting mechanism which adjusts positions of the reflection mirrors, imaging the luminous fluxes scanned by the light deflecting device on the scanning object. | 03-12-2009 |
20100060964 | OPTICAL BEAM SCANNING APPARATUS, AND IMAGE FORMING APPARATUS - An optical beam scanning apparatus according to the present invention includes a light source, a pre-deflection optical system, a light deflecting device, a post-deflection optical system, a first sensor configured to detect a part of the luminous fluxes deflected by the light deflecting device, one or plural first optical elements configured to be provided in the post-deflection optical system and act on the luminous fluxes deflected by all the deflection surfaces of the light deflecting device; and a second optical element having positive power in the sub-scanning direction configured to be provided in an optical path between any one of the first optical elements and the first sensor and act on the luminous fluxes deflected by all the deflection surfaces of the light deflecting device. | 03-11-2010 |
20100085646 | ERECT EQUAL-MAGNIFICATION LENS ARRAY, SCANNING OPTICAL SYSTEM, EXPOSING OPTICAL SYSTEM AND IMAGE FORMING APPARATUS - An erect equal-magnification lens array according to the present invention includes: a first lens array plate including a first lens plate and a group of plural convex lenses arrayed on an emission surface of the first lens plate, an incident surface of the first lens plate being formed in a planar shape; a first aperture plate having plural apertures; a second lens array plate including a second lens plate and a group of plural convex lenses arrayed on both an incident surface and an emission surface of the second lens plate; a second aperture plate including plural apertures corresponding to plural projections of the plural convex lenses on the emission surface of the second lens plate; and a third lens array plate including a third lens plate and a group of plural convex lenses arrayed on an incident surface of the third lens plate. | 04-08-2010 |
20100091082 | OPTICAL BEAM SCANNING APPARATUS AND IMAGE FORMING APPARATUS - An optical beam scanning apparatus according to the present invention includes: a light source; a pre-deflection optical system; a light deflecting device; a post-deflection optical system configured to include at least one or plural second optical elements, which act on light beams of all color components, and plural third optical elements, which respectively act on the light beam of each of the color components, and focus the light beams scanned by the light deflecting device on the scanning object; and a position adjusting mechanism configured to adjust the positions of the third optical elements according to incident directions of the light beams made incident on the third optical elements. Consequently, according to the present invention, it is possible to suitably adjust optical elements included in a post-deflection optical system in which individual focusing lenses are provided for respective color components. | 04-15-2010 |
20100177401 | ERECT LIFE-SIZE LENS ARRAY - An erect life-size lens array having a deep focal depth is realized. The erect life-size lens array includes a first lens array, a second lens array and an aperture, and when a thickness of the second lens is ξ | 07-15-2010 |
20100202058 | ERECT LIFE-SIZE LENS ARRAY - An erect life-size lens array having a deep focal depth is realized. The erect life-size lens array includes a first lens array, a second lens array, a third lens array, a first aperture and a second aperture, wherein when a distance between a second principal plane of the second lens and a first principal plane of the third lens is ξ | 08-12-2010 |
20100259808 | OPTICAL BEAM SCANNING DEVICE, IMAGE FORMING APPARATUS - An optical beam scanning device includes a polygon mirror | 10-14-2010 |
20110164296 | OPTICAL BEAM SCANNING DEVICE, IMAGE FORMING APPARATUS - An optical beam scanning device includes a polygon mirror | 07-07-2011 |
20110216418 | ERECT EQUAL-MAGNIFICATION LENS ARRAY - There is provided an erect equal-magnification lens array including: a plurality of first lenses causing light incident from an object point to each incidence plane, which has at least a partially planar shape, to be collected by each outgoing plane which has a convex shape; a plurality of second lenses aligned so as to correspond to each of the plurality of first lenses, having incidence planes each of which has a convex shape and is arranged in the vicinity of a position in the optical axis direction, at which the light is collected by each of the outgoing planes of the plurality of first lenses, and causing the light incident to each of the incidence planes to be collected again on an image plane using outgoing planes thereof each of which has a convex shape; and an aperture configured to shield light, from among the light collected by each of the outgoing planes of the plurality of first lenses, proceeding in a direction to be incident from each of the outgoing planes to the incidence planes of the second lenses other than the second lenses on the same optical axis. | 09-08-2011 |
20110216419 | ERECTING AND UNITY-MAGNIFYING LENS ARRAY AND CONTACT IMAGE SENSOR - An erecting and unity-magnifying lens array includes: a first lens array plate that has a plurality of first lenses, a second lens array plate that has a plurality of second lenses, a third lens array plate that has a plurality of third lenses, a first aperture plate that has a plurality of round holes formed therein, that is disposed between the first lens array plate and the second lens array plate, and that has a first thickness; and a second aperture plate that has a plurality of round holes formed therein, that is disposed close to the exit surface of the second lens array plate, that is disposed so that vertexes of the exit surfaces of the plurality of second lenses are located inside the plurality of round holds, and that has a second thickness smaller than the first thickness. | 09-08-2011 |