Canon Kabushiki Kaisha

Yuichi Tomioka

Takeshi Yamawaki

Shuichi Kurokawa

Kazuyuki Ishihara

Yoshihiro Ishibe

Yu Miyajima

Hideo Genda

An optically shaping apparatus includes a light modulation element having a plurality of pixels and configured to modulate light from a light source for each pixel, an optical system configured to irradiate modulation light from the light modulation element onto the photocurable resin through the light-transmissive portion, a controller configured to control the light modulation element based on each of a plurality of two-dimensional shape data corresponding to a plurality of sections in a three-dimensional object, and a moving member configured to move a cured portion cured by the modulation light among the photocurable resin in a direction separating from the light-transmissive portion. The controller controls an irradiation timing of the modulation light onto the photocurable resin for each pixel to form the cured portion corresponding to the same section in the three-dimensional object, in accordance with information on a shape of the light-transmissive portion.

Optically shaping apparatus and manufacturing method

An optical shaping apparatus includes a first optical unit including a light modulation element that has a plurality of pixels and modulates light from a first light source for each pixel and irradiating modulation light from the light modulation element onto the photocurable resin through the light-transmissive portion, a second optical unit including a scanning member configured to deflect light from a second light source, the second optical unit being configured to irradiate scanning light from the scanning member onto the photocurable resin through the light-transmissive portion, the first and second optical units not including a common optical member, and a controller that controls the light modulation element and the scanning member so as to irradiate the modulation light onto a first resin area, and to irradiate the scanning light onto a second resin area in the photocurable resin.

Optical shaping apparatus, manufacturing method, and storage medium

An optical shaping apparatus includes a light modulation element having a plurality of pixels and configured to modulate light from a light source for each pixel, a controller configured to control the light modulation element based on each of a plurality of two-dimensional shape data obtained from three-dimensional shape data, and a moving member configured to move a cured portion cured by the modulation light among the photocurable resin in a direction separating from the light-transmissive portion. The controller controls the light modulation element so as to irradiate the modulation light of an irradiation light amount corresponding to a light amount necessary for curing for each resin area, onto each of a plurality of resin areas in the photocurable resin based on a temperature distribution or a temperature change in the photocurable resin.

A light scanning apparatus includes a light source, a deflector configured to deflect a light flux from the light source, and an imaging optical system configured to guide the light flux deflected at the deflector onto a scanned surface. The imaging optical system consists of a single imaging optical element, wherein, on the optical axis of the imaging optical system, the conditions 0.15&#x2266;T2/Sk&#x2266;0.3 and 0.03&#x2266;d/K&#x2266;0.08 are satisfied. A condition 0.3&#x2266;B&#x2266;0.6 is satisfied at a condensing position Y where a scanning angle &#x3b8; is greatest, when the condensing position Y in the main scanning direction on the scanned surface of the light flux deflected at the scanning angle &#x3b8; by the deflector is expressed by Y=(K/B)&#xd7;tan(B&#xd7;&#x3b8;).

Light scanning apparatus and image forming apparatus using the same

An optical scanning apparatus includes a deflector configured to respectively deflect first and second light beams by a first deflection surface and scan first and second scanned surfaces in a main scanning direction, and first and second imaging optical systems configured to respectively collect the first and second light beams deflected by the deflector to the first and second scanned surfaces. The first and second imaging optical systems include a shared multistage lens including first and second optical surfaces arranged in a sub-scanning direction to which each of the first and second light beams enters, the second scanned surface is disposed on a position closer to the deflector than the first scanned surface, and a second optical path length from the first deflection surface to the second scanned surface is longer than a first optical path length from the first deflection surface to the first scanned surface.

Optical scanning apparatus and image forming apparatus including the same

An optical scanning device includes a deflector configured to deflect a plurality of light beams emitted from a plurality of light emitters that are mutually spaced apart in a sub-scanning direction; an incident optical system configured to steer the plurality of light beams so as to be incident on the deflector; an imaging optical system configured to steer the plurality of light beams so as to be obliquely incident on a surface to be scanned and to form images of the plurality of light emitters on the surface to be scanned; and a correction unit configured to correct a jitter of at least one of the plurality of light beams in a main scanning direction on the basis of irradiation position information, in the sub-scanning direction, of at least one light beam among the plurality of light beams at a point corresponding to the surface to be scanned.

Optical scanning device, method for manufacturing the optical scanning device, and image forming apparatus

Light scanning apparatus with single optical imaging element and image forming apparatus using the same

An optical scanning device configured to remove or sufficiently reduce ghost light includes an input optical system for directing a light beam from a light source to a deflecting surface of a deflector, and an imaging optical system for imaging a light beam scanningly deflected by the deflecting surface upon a surface to be scanned, wherein, in a sub-scan section, the light beam is incident on the deflecting surface of the deflector from an oblique direction with respect to an optical axis of the imaging optical system, wherein a light blocking member for blocking ghost light is disposed on a light path between the deflecting surface and the scanned surface, wherein an end portion of the light blocking member in the sub-scan direction is formed with a curved shape having a height in the sub-scan direction which height changes in accordance with the position in the main-scan direction.

Optical scanning device and image forming apparatus using the same

An optical scanning device includes a light source device, a deflector, an input optical system for directing a light beam from the light source device onto the deflector, and an imaging optical system for imaging a light beam scanningly deflected by a deflecting surface of the deflector, upon a scan surface to be scanned, wherein, in a sub-scan section, a light beam directed from the input optical system toward the deflecting surface of the deflector is incident thereon at a finite angle with respect to a plane which is orthogonal to a rotational axis of the deflector, wherein the imaging optical system includes at least one molded imaging lens, and wherein a shape within a sagittal section of at least one lens surface, of lens surfaces of the at least one imaging lens, is non-arcuate, and a sagittal curvature in a light beam passage region has an extreme value.

An image forming apparatus includes photosensitive drums including one for black, light source devices, a rotary polygonal mirror having deflecting surfaces with chamfers, input optical systems, imaging optical systems and a synchronism detecting system for detecting a synchronizing light beam for determining the timing for scanning each of the photosensitive drums in a main scan direction, wherein the synchronism detecting system detects a light beam for forming an image of a color different from the black, and wherein the timing as the synchronism detecting device obtains a synchronizing signal and the timing as a light beam from the input optical system, which is at the side where the synchronism detecting device is provided, is incident on the chamfer of the deflecting surface of the rotary polygonal mirror, are at least partly overlapping.

Image forming apparatus

An optical scanning apparatus having a low-height optical box and accurately arranged reflecting mirrors, and an image forming apparatus using the same. The imaging optical system includes: an imaging optical element which a scanning beam transmits off a profile center thereof in a sub-scanning direction during guiding a beam from a light source to a scanning surface by an imaging optical system via a deflector; a first mirror which deflects the beam transmitted the imaging optical element to fold an optical path toward the edge-surface-A side where within the sub-scanning section, the edge surface A is one of the edge surfaces of the imaging optical element closer to a passing position of the scanning beam; and a second mirror. The second mirror is disposed between the deflection unit and imaging optical element so that the second mirror exists across a plane including the edge surface A.

Optical scanning apparatus and image forming apparatus using the same

An optical scanning apparatus includes a light-source unit, an incident optical system for directing light beams emitted from the light-source unit to a deflecting unit, and an imaging optical system for guiding the light beams deflected from the deflecting unit to a surface to be scanned. The imaging optical system includes a toric lens whose power in the main scanning direction is different from that in the sub-scanning direction; the toric lens having the curvature centers of the meridians of a first toric surface connected to form a curved line located in a common plane Ha, and the curvature centers of the meridians of a second toric surface connected to form a curved line not located in a common plane.

Optical scanning apparatus and image-forming apparatus

A compact optical scanning apparatus capable of desirably correcting an f characteristic, a field curvature, and other aberrations, and an image forming apparatus using the same, which includes an incident optical system (LA) for guiding a beam from a light source () to a deflector () and an imaging optical system (LB) for guiding the beam to a scanning surface (), wherein a scanning field angle region whereandare satisfied exists within effective scanning field angle region, where in a main scanning cross section and for a scanning field anglerepresents an angle between a principal ray of beam incident on an optical element included in the imaging optical system and located closest to the scanning surface and an optical axis of the imaging optical system andan angle between a principal ray of a beam from the optical element and the optical axis.

Optical scanning apparatus and image forming apparatus using the same including relationship between interval between deflector and scanned surface and a natural convergent point

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Utsunomiya, Japan

Yuichi Tomioka