摘要:
An optical pickup and an optical recording and/or reproducing apparatus adopting the same are provided. The optical pickup includes an optical unit (10), first and second objective lenses (60, 70), and an optical path switching unit (50, 150, 250). The optical unit illuminates light onto an information storage medium (1) and receives light reflected from the information storage medium (1) to detect an information signal and/or an error signal. The first and the second objective lenses (60, 70) focus incident light to form a light spot on an information storage surface of the information storage medium (1). The optical path switching unit (50, 150, 250) selectively directs the light incident from the optical unit to one of the first and second objective lenses (60, 70). In the optical pickup, since the light quantity directed to a plurality of objective lenses may be maximized, optical efficiency is increased and thus high-speed operation may be attained.
摘要:
An imaging apparatus and an image sensor, where the imaging apparatus includes a lens unit and an image sensor including a plurality of image detection pixels for detecting an image formed by the lens unit and a plurality of focus detection pixels for detecting a focus of the image, wherein the plurality of focus detection pixels are arranged in a non-uniform pattern in which arrangements within shared intervals between the plurality of focus detection pixels are not equal to each other. Accordingly, the focus of an image formed on the image sensor can be accurately measured while a loss of image quality of the image formed on the image sensor is minimized.
摘要:
A solid-state image sensor (120) of an electronic device includes a plurality of pixels (R,G,B,P) arranged in a matrix form and having a plurality of phase difference pixels (P) of the plurality of pixels. The plurality of phase difference pixels are arranged at locations of pixels that are commonly read out in a plurality of different skip readout modes.
摘要:
An imaging apparatus and an image sensor, where the imaging apparatus includes a lens unit and an image sensor including a plurality of image detection pixels for detecting an image formed by the lens unit and a plurality of focus detection pixels for detecting a focus of the image, wherein the plurality of focus detection pixels are arranged in a non-uniform pattern in which arrangements within shared intervals between the plurality of focus detection pixels are not equal to each other. Accordingly, the focus of an image formed on the image sensor can be accurately measured while a loss of image quality of the image formed on the image sensor is minimized.
摘要:
A light scanning unit (100) including a light source unit (110) for emitting a collimated light beam, and a beam deflector (170) for deflecting and scanning the collimated light beam and having a mirror surface controllable to oscillate, a light scanning method and an image forming apparatus employing the light scanning unit are disclosed. The light source unit may be made to oscillate synchronously with the oscillation of the beam deflector so that the incident angle of the collimated light beam on the beam deflector changes in synchronization with the oscillation of the beam deflector, thereby allowing an increase of the maximum deflection angle of the light beam deflected and scanned by the beam deflector.
摘要:
An optical deflector (20) includes a driving mirror (14), which is driven to rotate and has a deflecting surface for deflecting an incident light. Gratings (16) are formed on the deflecting surface, each grating having a shape that makes the intensities of light beams diffracted at a positive order and a negative order different from each other. A main scanning line (S) formed by a trace of the deflected light according to the rotation of the driving mirror (14) is a straight line. The optical deflector (20) is used in an optical scanning apparatus with a light source. The optical scanning apparatus is utilized in an image forming apparatus for forming an electrostatic latent image onto an exposure object.
摘要:
A multilayer recording medium that prevents deterioration of a signal characteristic due to a mirror effect that may occur between recording layers and a method of manufacturing the same, the multilayer recording medium having at least two recording layers, wherein a thickness of at least one spacer layer between adjacent recording layers is different from a thickness of the other spacer layers such that a beam focusing on a recording layer (K) is prevented from focusing on another recording layer (Q) corresponding to a mirror layer (K+2) due to reflection. In the multilayer recording medium, a mirror effect is greatly reduced. In addition, the thickness of only a spacer layer exerting the most significant influence on the mirror effect is changed to prevent the deterioration of signal quality due to the mirror effect, and therefore, the structure of a multilayer recording medium is simplified.
摘要:
An optical pickup apparatus, including a light source (11) to emit light, an objective lens (16) to form a light spot on an optical recording medium by focusing the light emitted from the light source, an optical division unit (13), disposed between the light source and the objective lens, to divide the light emitted from the light source into a main beam and two subbeams to form one main spot and two subspots on the optical recording medium, the optical division unit having a first area and a second area surrounding the first area, a detector (20) to detect the amount of light of the main beam and the amount of light of the respective subbeams reflected from the optical recording medium, a beam splitter (14) disposed between the light source and the objective lens to allow the light reflected from the optical recording medium to be directed to the detector, signal generating circuits to generate a tracking error signal (TES), a focusing error signal (FES), and a spherical aberration signal (SAS), respectively, in response to the output of the detector, and a spherical aberration compensation unit (15), disposed between the objective lens and the beam splitter, to compensate for spherical aberration using the SAS generated by the signal generating circuits.
摘要:
A multilayer recording medium that prevents deterioration of a signal characteristic due to a mirror effect that may occur between recording layers and a method of manufacturing the same, the multilayer recording medium having at least two recording layers, wherein a thickness of at least one spacer layer between adjacent recording layers is different from a thickness of the other spacer layers such that a beam focusing on a recording layer (K) is prevented from focusing on another recording layer (Q) corresponding to a mirror layer (K+2) due to reflection. In the multilayer recording medium, a mirror effect is greatly reduced. In addition, the thickness of only a spacer layer exerting the most significant influence on the mirror effect is changed to prevent the deterioration of signal quality due to the mirror effect, and therefore, the structure of a multilayer recording medium is simplified.