摘要:
Disclosed is an optical scanning device which includes a light source device, a deflecting system for deflecting a light beam emitted from the light source device, and a scanning optical system for scanning a surface to be scanned, with the light beam deflected by the deflecting system, wherein the scanning optical system includes a scanning optical element disposed so that, with respect to a sub-scan direction, a principal ray of the deflected light beam passes a portion other than an optical axis, wherein the scanning optical element has a sagittal aspherical amount changing surface in which an aspherical amount of a sagittal changes along a main scan direction of the scanning optical element, and wherein, throughout the whole surface to be scanned, the position in the sub-scan direction upon which the deflected light beam impinges is made even.
摘要:
A compact displaying optical system capable of reducing a speckle noise and a loss of light amount is disclosed. The displaying optical system comprises a light source which emits coherent light, and a polarization control element which has a first area and a second area where light components of the light enter, respectively. The polarization control element makes the polarization state of the light component entering the first area different from that of the light component entering the second area.
摘要:
A multibeam scanner including a light source for emitting a plurality of light beams, a deflector for deflecting the plurality of light beams emitted from the light source, and a scanning optical system for guiding the plurality of light beams deflected by the deflector to a scan surface. A first light shielding member for determining one end of the diameter of at least one of the plurality of light beams and a second light-shielding member for determining the other end of the diameter of the at least one of the plurality of light beams are disposed apart from each other in a direction in which the light beams propagate and between the light source and the deflector. The first light-shielding member and the second light-shielding member are used to limit the diameter of the at least one of the plurality of light beams.
摘要:
It is an object of this invention to provide a light scanning device capable of suppressing a scanning line bend to a low level, which is caused by the arrangement error of a single-element lens serving as an imaging optical element, and an image forming apparatus using the device. In order to achieve the object, according to this invention, an imaging optical system is formed from a single-element lens, and a sectional shape of an exit surface in the main scanning direction is an arcuated shape. The power in the sub scanning direction substantially concentrates on the exit surface having an arcuated sectional shape in the main scanning direction, and the arcuated shape (curvature) in the main scanning direction is so determined as to make the magnification in the sub scanning direction uniform.
摘要:
A scanning optical system includes a light source, a light deflector, a first optical system for making light beam emitted by the light source strike a deflection surface of the light deflector with the light beam having a width larger than a width of the deflection surface in a main scanning direction, and a second optical system for imaging the light beam deflected/reflected by the light deflector in form of spot on a surface to be scanned. The second optical system has a plurality of lenses, and at least one of the lenses has a surface whose generating-line corresponding to the main scanning direction is non-arcuated.
摘要:
A light scanning apparatus includes a scanner 104 which scans a coherent light beam from a light source 101 , a light beam component generator 110 which divides the coherent light beam outgoing from the scanner 104 into a plurality of light beam components, and an optical system 105 which collects the plurality of light beam components so that they are incident on a scan surface 106 at an incident angle different from each other, and superposes the light beam components at an identical position on the scan surface.
摘要:
The present invention provides a sensor element including two diode elements connected in series to each other, and a capacitive element having one end connected to a junction point between the two diode elements. Each of the diode elements includes a semiconductor layer having a p-type semiconductor region and an n-type semiconductor region facing each other in an in-plane direction, an anode electrode connected to the p-type semiconductor region, a cathode electrode connected to the n-type semiconductor region, a gate insulting film adjoining the semiconductor layer in a stacking direction, and a gate electrode facing the semiconductor layer with the gate insulating film in between.
摘要:
Disclosed is a two-dimensional scanning apparatus which includes a deflecting unit for deflecting a light beam from a light source two-dimensionally, and a scanning optical system for directing the light beam deflected by the deflecting unit onto a surface to be scanned. The scanning optical system includes an optical surface which is tilted at an angle larger than a maximum angle of view relative to a central axis of a two-dimensional deflection range of the light beam deflected by the deflecting unit. The two-dimensional scanning apparatus is capable of preferably and readily correcting distortion including TV distortion which is likely to appear when a light beam is two-dimensionally deflected and scanned to from a two-dimensional image.
摘要:
A light scanning apparatus includes a scanner 104 which scans a coherent light beam from a light source 101, a light beam component generator 110 which divides the coherent light beam outgoing from the scanner 104 into a plurality of light beam components, and an optical system 105 which collects the plurality of light beam components so that they are incident on a scan surface 106 at an incident angle different from each other, and superposes the light beam components at an identical position on the scan surface.
摘要:
Disclosed in a multi-beam optical scanning apparatus which includes a light source unit including a plurality of radiation points disposed with being spaced from each other in a main scanning direction, and a deflecting unit for deflecting a plurality of light beams radiated from the light source unit toward a surface to be scanned. Where a first radiation point is a radiation point for radiating the light beam, out of the plurality of light beams emitted from the light source unit, which reaches the farthest location from a center of a deflecting facet of the deflecting unit in the main scanning direction, a second radiation point is a radiation point for radiating another light beam, and an upstream-side external angular range is a range which lies in an angular range over which the light beam can be deflected by the deflecting unit, and which exists on an upstream side in a rotational direction of deflecting unit relative to an effective scanning angular range at the time when the light beam is deflected toward an effective scanning range on the surface to be scanned, the second radiation point is excited in the first place in the upstream-side external angular range.