Patent application number | Description | Published |
20100091351 | SCANNING OPTICAL DEVICE AND IMAGE FORMING APPARATUS USING THE SAME - A scanning optical device wherein, on the basis of positional information concerning a spacing in a main-scan direction between imaging positions of a plurality of light beams passed through resin-made imaging optical elements and detected by a photodetecting device and a spacing between the imaging positions in a sub-scan direction of the plurality of light beams, a focal shift direction and a focal shift amount in the main-scan direction as well as a focal shift direction and a focal shift amount in the sub-scan direction are determined, and wherein an optical element of an input optical system is moved in an optical axis direction based on the determination, to correct the focal shift in the main-scan direction and the focal shift in the sub-scan direction. | 04-15-2010 |
20100119258 | SCANNING OPTICAL APPARATUS AND IMAGE FORMING APPARATUS USING THE SAME - A scanning optical apparatus includes: an incident optical system which is disposed in an optical path between a light source unit and a deflection unit, and includes an optical element for making a light flux emitted from the light source unit enter a deflection surface of the deflection unit with an oblique angle in a sub scanning section; and a positional regulation member for holding the optical element having an x reference surface for performing positional regulation of the optical element in an optical axis direction and a z reference surface for performing positional regulation of the optical element in a sub scanning direction. The optical element is held by a casing so that the x reference surface and the z reference surface contact with the positional regulation member of the casing. The principal ray of the light flux outgoing from the optical element satisfies a conditional equation (1). | 05-13-2010 |
20100277730 | SPECTRAL COLORIMETRIC APPARATUS AND COLOR IMAGE FORMING APPARATUS USING THE SAME - A spectral colorimetric apparatus for detecting a color of an image of a test subject illuminated includes a stop; a spectral detection optical system for spectrally detecting a beam diffused in the test subject and passing through the stop; and a guiding optical system for guiding, toward the stop, the beam diffused in the test subject, wherein in a first section which is a section including an optical axis of the guiding optical system, condensing positions of the light beam condensed by the guiding optical system change depending on a position in a direction orthogonal to the first section, and the stop is disposed between condensing positions closest to and farthest from the guiding optical system, of condensing positions, in the first section, of the beam condensed by the guiding optical system, in a direction of the optical axis of the guiding optical system. | 11-04-2010 |
20100277731 | SPECTROMETER AND IMAGE FORMING APPARATUS HAVING THE SAME - There is provided is a spectrometer having a concave reflection type diffraction element, wherein, among surfaces other than a diffraction surface of the diffraction element, non-diffraction surfaces which are located outside the diffraction surface at the same side as the diffraction surface are a glossy surface, the spectrometer includes a light detection unit which is located at an imaging position of a first-order diffracted light diffracted by the diffraction element to receive the first-order diffracted light, and the light detection unit is disposed inside optical paths of light beams regularly reflected on the non-diffraction surfaces outside the diffraction surface. Accordingly, it is possible to effectively suppress a stray light reflected on the surfaces other the diffraction surface from being incident into the light detection unit and to detect the light spectrally diffracted by the diffraction surface at high accuracy. | 11-04-2010 |
20100277775 | ILLUMINATOR, AND SPECTRAL APPARATUS AND IMAGE READING APPARATUS THEREWITH - Provided is an illuminator including a light source unit having a light emitting surface, and a light guiding member guiding a light beam to an original disposed on an original plate. An intersection of a center axis of a light emitting surface and the original plate is separated from a reading position of the original in a sub scanning direction, the light guiding member includes an incident surface to which the light beam emitted from the light source unit is incident, a reflection surface that reflects the incident light beam, and an exiting surface exiting the incident light beam and the reflected light beam, and in the sub scanning section, the light beam having the highest light intensity in the light beams from the light source unit is deflected at the incident surface toward the reading position of the original with respect to the center axis. | 11-04-2010 |
20100278543 | SPECTRAL COLORIMETRIC APPARATUS AND IMAGE FORMING APPARATUS USING THE SAME - A spectral colorimetric apparatus for detecting a color of an image of a subject, including: an illumination optical system illuminating the subject on a detection surface; a spectral optical system including a spectral element spectrally separating the beam diffused by the subject and a light receiving element array detecting a spectral intensity distribution; and a guiding optical system for guiding a beam diffused by the subject, wherein: the detection surface is parallel to a spectral plane including a principal ray of a beam entering the spectral optical system and a principal ray of a beam spectrally separated; the principal ray of the beam enters the spectral optical system within the spectral plane obliquely to a line joining a center of the light receiving element array with a surface vertex of the spectral element; and a light receiving surface of the light receiving element array is orthogonal to the spectral plane. | 11-04-2010 |
20130201478 | SPECTROMETER AND IMAGE FORMING APPARATUS HAVING THE SAME - There is provided is a spectrometer having a concave reflection type diffraction element, wherein, among surfaces other than a diffraction surface of the diffraction element, non-diffraction surfaces which are located outside the diffraction surface at the same side as the diffraction surface are a glossy surface, the spectrometer includes a light detection unit which is located at an imaging position of a first-order diffracted light diffracted by the diffraction element to receive the first-order diffracted light, and the light detection unit is disposed inside optical paths of light beams regularly reflected on the non-diffraction surfaces outside the diffraction surface. Accordingly, it is possible to effectively suppress a stray light reflected on the surfaces other the diffraction surface from being incident into the light detection unit and to detect the light spectrally diffracted by the diffraction surface at high accuracy. | 08-08-2013 |
20130250295 | SPECTRAL COLORIMETRIC APPARATUS AND IMAGE FORMING APPARATUS USING THE SAME - A spectral colorimetric apparatus for detecting a color of an image of a subject, including: an illumination optical system illuminating the subject on a detection surface; a spectral optical system including a spectral element spectrally separating the beam diffused by the subject and a light receiving element array detecting a spectral intensity distribution; and a guiding optical system for guiding a beam diffused by the subject, wherein: the detection surface is parallel to a spectral plane including a principal ray of a beam entering the spectral optical system and a principal ray of a beam spectrally separated; the principal ray of the beam enters the spectral optical system within the spectral plane obliquely to a line joining a center of the light receiving element array with a surface vertex of the spectral element; and a light receiving surface of the light receiving element array is orthogonal to the spectral plane. | 09-26-2013 |
20140160573 | LENS ARRAY, IMAGE-FORMING APPARATUS AND IMAGE-READING APPARATUS INCLUDING LENS ARRAY - A lens array includes a first image-forming unit having a plurality of lens portions arrayed in a first direction and configured to form an intermediate image of an object at an intermediate image plane; and a second image-forming unit having a plurality of lens portions arrayed in the first direction and configured to re-image the intermediate image of the object onto a final image plane. The plurality of lens portions of the first and second image-forming units each have an anamorphic surface on a lens surface closest to the intermediate image plane, and each anamorphic surface has a shape having a decreased power at end portions as compared to a power in the vicinity of a surface vertex. | 06-12-2014 |
20150035929 | OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS INCLUDING THE SAME - Provided is an optical scanning apparatus which can achieve high resolution while reducing detection errors in the synchronous detection of a plurality of light fluxes by temperature fluctuations. An optical scanning apparatus according to this invention includes a light source having a plurality of light-emitting points, a deflection unit configured to deflect a plurality of light fluxes emitted by the plurality of light-emitting points, a scanning optical system configured to guide the plurality of light fluxes deflected by the deflection unit onto a scanned surface, and a synchronous detection unit configured to detect light fluxes from at least two light-emitting points of the plurality of light-emitting points. The synchronous detection unit includes a plurality of imaging elements. The first imaging element, of the plurality of imaging elements, which exhibits the smallest change in refractive index with respect to temperatures has the largest refractive power in a main scanning section. | 02-05-2015 |