摘要:
A drive controller for electrode group A obtains a disc type, a current layer, and a temperature of the liquid crystal element, and based on contents of the information, it obtains drive voltage values to be applied to the electrodes of the group of electrodes A from the set value table. When the drive voltages to be applied to the group of electrodes A are determined, the drive controller for electrode group A finishes the process, and the process flow goes to a process performed by the drive controller for electrode group B. The drive controller for electrode group B performs initialization of segment numbers. Then, it determines how a phase correction quantity of an electrode Am has changed along with an increase of a radius of the liquid crystal element by using graphs and data, so as to determine the drive voltages to be applied to the group of electrodes B by different calculating methods for different areas in which the electrode Am is disposed.
摘要:
An optical pickup device is equipped with a diffraction element that includes a transparent substrate. At least one surface of the transparent substrate is provided with a first region and a second region that encloses the first region. The surface is provided with a plurality of types of diffraction areas each of which generates predetermined diffracted light from only a light beam having a specific wavelength and permits other light beams having other wavelengths to pass through without diffraction. The first region is provided with each of the plurality of types of diffraction areas, while the second region is provided with only a diffraction area that generates the predetermined diffracted light from only a light beam having the maximum incident diameter among the plurality of types of diffraction areas.
摘要:
A variable-shape mirror has a support substrate, a mirror portion that faces the support substrate and that has a mirror surface on the side thereof opposite to the side thereof facing the support substrate, a plurality of fixing portions that fix the mirror portion to the support substrate, and a plurality of driving portions that deform the mirror surface by expanding and contracting between the support substrate and the mirror portion. On the support substrate, elevations are formed to serve as bonding surfaces bonded to the fixing portions, as electrodes bonded to the driving portions to feed voltages thereto, and as conductors electrically connected to the electrodes.
摘要:
The present invention allows a user to easily find out destinations on maps without forcing him/her to perform troublesome operations. An apparatus displays a main map image 21 showing a current position at substantially a center of a screen. The apparatus also disposes a plurality of map images 22 through 29 around the main map image 21 in thumbnail format such that each map image 22 through 29 corresponds to each direction on the main map image 21. In this manner, the apparatus provides the user with information about wider area than the main map image 21 by showing him/her the thumbnails 22 through 29, which are disposed around the main map image 21 such that each thumbnail 22 through 29 corresponds to each direction on the main map image 21. That allows the user to easily find out destinations on maps without forcing him/her to perform troublesome operations.
摘要:
A laser light source emits a laser light of an elliptical shape in its polarization plane in parallel to the information recording surface of an optical disc. The laser light is incident into a raising unit, which is placed in a manner that the plane including the optical axis of the incident light and the optical axis of the reflected light forms about 45 degrees with respect to the tangential line direction of the optical disc, in a manner that the direction of the major axis of the elliptical-shaped polarization plane of the laser light is in parallel to the information recording surface of the optical disc. Then, the laser light reflected by the raising unit is focused and irradiated on the information recording surface of an optical disc as a spot light.
摘要:
An optical recording/reproducing apparatus having drive means for rotating a recording medium, an optical head for applying light to the recording medium being rotated by the drive means, thereby to record data signals on the recording medium or reproducing data from the recording medium, and a signal-processing circuit for processing a signal detected by the optical head. The optical head comprises a light source for emitting light, an objective lens, and signal detecting means. The objective lens has a numerical aperture NA, where 0.5
摘要:
To implement light quantity monitoring with high frequency responsivity and correction of astigmatic differences of a semiconductor laser with a simple configuration with fewer parts. Of the output from a semiconductor laser light source, a peripheral component is entered by a light reflection element into an anterior light monitoring photodetector formed in the vicinity of a semiconductor laser light source. Furthermore, the surface of the reflection sphere of the light reflection element is anamorphic, and thus condensed to an appropriate size on the photodetector without being focused, providing high frequency responsivity. Furthermore, the light reflection element is inclined at a predetermined angle to cancel out astigmatic differences of the optical semiconductor laser light source. In addition, the photodetector is placed so that reflected light is bent by an inclination of the light reflection element, reducing the amount of parallel displacement during adjustment of the light reflection element.
摘要:
In an optical head, two object lenses 3a, 3b fixed to a lens holder 4 are provided to serve as means for condensing a light beam 11 wherein these object lenses 3a, 3b are at positions eccentric from a support axis 10. The object lenses 3a and 3b are fabricated to satisfy prescribed conditions to suppress aberration. When either object lens 3a or 3b is selected for an optical recording medium 17, 18, degrading of signals can be prevented. Alternatively, two light sources 14, 25 are provided for one object lens 19, and the object lens is fabricated to satisfy prescribed conditions to suppress aberration. When either one of the light sources is used, degrading of signals can be prevented. In a different optical head, a recording medium 107 is set on a disk driving device 111, and an optical head 115 is provided movable freely in radial directions. The tilt of the recording medium is detected with a sensor, and the optical axis of the beam is controlled according to the detected tilt to cancel aberration.
摘要:
A laser light beam is illuminated via an objective lens on the signal surface of an optical disc and the objective lens is displaced by a servo processor along the optical axis for focussing search to generate focussing error signals by a RF block from a detected output of the laser light by the signal surface of the optical disc. Based on these focussing error signals, a system controller discriminates the types of the optical disc having different numbers of signal recording layers for setting an operating mode in keeping with the types of the optical disc.
摘要:
Disclosed is a rotary input device including: a rotary operation device; a rotation driving section; a detection section; a force sense presenting section to present a force sense by a combination of at least two of applying the rotary force in a clockwise direction, applying the rotary force in a counterclockwise direction, and stopping applying the rotary force; a display control section; a magnification ratio change instructing section; and a scroll instructing section, wherein the magnification ratio change instructing section instructs enlargement when rotating in one side, and instructs reduction when rotating in the other side; the scroll instructing section instructs on the basis of the depressed position; and the force sense presenting section changes a way of presenting the force sense in order that the operator can perceive a display state pertaining to a display position or a display magnification ratio of the image under display distinguishably.