Abstract: A relative position identifying unit identifies a relative position of a scale to a light receiving unit. An absolute position identifying unit identifies an absolute position of the scale at a timing of execution of a synchronization instruction. A determining unit determines a measurement reference position based on the absolute position at the timing and the relative position at the timing. A current position calculator calculates a current position of the scale based on the measurement reference position and the relative position identified by the relative position identifying unit. A control unit as a synchronization instructing unit executes the synchronization instruction on the absolute position identifying unit and the determining unit.

Abstract: An interocular luminance analyzing unit analyzes luminance perceived between eyes of an observer based on a luminance distribution image, thereby generating a stereoscopy determination image, a stereoscopy determining unit determines a stereoscopy possible region based on this stereoscopy determination image. This is applicable irrespective of the kind of 3D displays including the two-view type, the multi-view type, and the integral type. Therefore, with the apparatus for evaluating optical properties of a 3D display and the method for evaluating optical properties of a 3D display, the evaluation of optical properties can be performed independently of the kind of 3D displays.

Abstract: A display device includes: a display unit that displays an image on a display surface; a detection unit that detects, relative to the display surface, a position of an operation element including a magnetic member; and an external force application unit that applies an external force to the operation element via the magnetic member, by generating a magnetic field in a space faced by the display surface, according to the position of the operation element detected by the detection unit and content of the image displayed by the display unit.

Abstract: A three-dimensional image display device is provided which allows a reduction in redundant calculation and high-speed obtainment of an optimum control image to be recorded on an optical wavefront control unit This invention relates to a three-dimensional image display device for displaying a three-dimensional image by irradiating illuminating light at an optical wavefront control unit which records a control image. The three-dimensional image display device of this invention includes a control image optimizing unit which calculates three-dimensional images corresponding to a group of control images based on constraints inherent to the optical wavefront control unit, selects a control image corresponding to a three-dimensional image satisfying a predetermined condition from the group of control images and records the selected control image on the optical wavefront control device.

Abstract: An interocular luminance analyzing unit analyzes luminance perceived between eyes of an observer based on a luminance distribution image, thereby generating a stereoscopy determination image, a stereoscopy determining unit determines a stereoscopy possible region based on this stereoscopy determination image. This is applicable irrespective of the kind of 3D displays including the two-view type, the multi-view type, and the integral type. Therefore, with the apparatus for evaluating optical properties of a 3D display and the method for evaluating optical properties of a 3D display, the evaluation of optical properties can be performed independently of the kind of 3D displays.

Abstract: A display device includes: a display unit that displays an image on a display surface; a detection unit that detects, relative to the display surface, a position of an operation element including a magnetic member; and an external force application unit that applies an external force to the operation element via the magnetic member, by generating a magnetic field in a space faced by the display surface, according to the position of the operation element detected by the detection unit and content of the image displayed by the display unit.

Abstract: An optical wavefront control pattern generating apparatus (1) relating to the present invention includes: a target image detector unit (60) configured to detect spatial information of the object (B) as a target image; a reconstructed image detector unit (40) configured to detect the reconstructed image displayed on the reconstructed image display unit (30); and an optimizer unit (50) configured to evaluate, on the basis of the target image detected by the target image detector unit (40), the reconstructed image detected by the reconstructed image detector unit (40), and to apply a modification process to the optical wavefront control pattern in a way that a result of the evaluation satisfies a predetermined condition, so as to generate the optimum optical wavefront control pattern.

Abstract: An optical wavefront control pattern generating apparatus includes: a reconstructed image detector unit configured to detect a reconstructed image displayed on the reconstructed image display; and an optimizer unit configured to evaluate the reconstructed image detected by the reconstructed image detector unit, and to generate the optimum optical wavefront control pattern by applying a modification process to the optical wavefront control pattern in order for a result of the evaluation to satisfy a predetermined condition.

Abstract: An image display apparatus includes: a light modulation device having an electro-optic effect in which a refractive index changes according to electric field intensity; a plurality of control points provided on a surface of the light modulation device; and an electric field control section configured to control voltage values to be applied to the plurality of control points, and to form electric field displacement surfaces having a predetermined image pattern in the light modulation device.

Abstract: It is an object of the present invention to display unnaturalness-free images without showing an observer repetitive images in accordance with the observer's viewpoint. A light beam control element 101b limits a viewing area of images composed of light emitted from a light source array 101a. Here, a terminal position detection sensor 102 or an observer position detection sensor 103 detects a relative positional relationship between the observer's eye observing the image formed by the light emitted from the light source array 101a, and the light source array 101a and the light beam control element 101b. Based on the positional relationship detected by these sensors, a display image control device 104 controls the light source array 101a so as to change display contents of the light forming the image with the viewing area limited by the light beam control element 101b.

Abstract: A three-dimensional hologram image display apparatus displays a three-dimensional hologram image by use of computed interference fringe patterns. The three-dimensional hologram image display apparatus includes a light modulation device which has an electro-optical effect in which a refractive index is varied in accordance with an applied electric field intensity; and an electric field controller configured to record computed interference fringe patterns in the light modulation device by varying an electric field intensity applied to the light modulation device in accordance with the computed interference fringe patterns.

Abstract: An optical wavefront control pattern generating apparatus includes: a reconstructed image detector unit configured to detect a reconstructed image displayed on the reconstructed image display unit; and an optimizer unit configured to evaluate the reconstructed image detected by the reconstructed image detector unit, and to generate the optimum optical wavefront control pattern by applying a modification process to the optical wavefront control pattern in order for a result of the evaluation to satisfy a predetermined condition.

Abstract: An optical wavefront control pattern generating apparatus (1) relating to the present invention includes: a target image detector unit (60) configured to detect spatial information of the object (B) as a target image; a reconstructed image detector unit (40) configured to detect the reconstructed image displayed on the reconstructed image display unit (30); and an optimizer unit (50) configured to evaluate, on the basis of the target image detected by the target image detector unit (40), the reconstructed image detected by the reconstructed image detector unit (40), and to apply a modification process to the optical wavefront control pattern in a way that a result of the evaluation satisfies a predetermined condition, so as to generate the optimum optical wavefront control pattern.

Abstract: A three-dimensional image display device is provided which allows a reduction in redundant calculation and high-speed obtainment of an optimum control image to be recorded on an optical wavefront control unit This invention relates to a three-dimensional image display device for displaying a three-dimensional image by irradiating illuminating light at an optical wavefront control unit which records a control image. The three-dimensional image display device of this invention includes a control image optimizing unit which calculates three-dimensional images corresponding to a group of control images based on constraints inherent to the optical wavefront control unit, selects a control image corresponding to a three-dimensional image satisfying a predetermined condition from the group of control images and records the selected control image on the optical wavefront control device.

Abstract: It is an object of the present invention to display unnaturalness-free images without showing an observer repetitive images in accordance with the observer's viewpoint. A light beam control element 101b limits a viewing area of images composed of light emitted from a light source array 101a. Here, a terminal position detection sensor 102 or an observer position detection sensor 103 detects a relative positional relationship between the observer's eye observing the image formed by the light emitted from the light source array 101a, and the light source array 101a and the light beam control element 101b. Based on the positional relationship detected by these sensors, a display image control device 104 controls the light source array 101a so as to change display contents of the light forming the image with the viewing area limited by the light beam control element 101b.

Abstract: An image display apparatus includes: a light modulation device having an electro-optic effect in which a refractive index changes according to electric field intensity; a plurality of control points provided on a surface of the light modulation device; and an electric field control section configured to control voltage values to be applied to the plurality of control points, and to form electric field displacement surfaces having a predetermined image pattern in the light modulation device.

Abstract: A probe driving mechanism for displacement measuring apparatuses, capable of carrying out a stable, constant speed probe feeding operation without additionally providing a motor rotation detecting rotary encoder and a tachometer generator. When an output from a scale varies in accordance with the power applied to a motor, the power applied to the motor is controlled in accordance with an output from the scale. When the variation of an output from the scale becomes small even though the same level of power continues to be applied to the motor, a judement that a probe contacts the workpiece is given, and the power applied to the motor is set smaller. When an output from the workpiece sensor varies, the power applied to the motor is controlled in accordance with one of an output from the scale and that from the workpiece sensor the speed variation of which is larger than that of the other.

Abstract: A three-dimensional hologram image display apparatus displays a three-dimensional hologram image by use of computed interference fringe patterns. The three-dimensional hologram image display apparatus includes a light modulation device which has an electro-optical effect in which a refractive index is varied in accordance with an applied electric field intensity; and an electric field controller configured to record computed interference fringe patterns in the light modulation device by varying an electric field intensity applied to the light modulation device in accordance with the computed interference fringe patterns.

Abstract: A probe driving mechanism for displacement measuring apparatuses, capable of carrying out a stable, constant speed probe feeding operation without additionally providing a motor rotation detecting rotary encoder and a tachometer generator. When an output from a scale varies in accordance with the power applied to a motor, the power applied to the motor is controlled in accordance with an output from the scale. When the variation of an output from the scale becomes small even though the same level of power continues to be applied to the motor, a judement that a probe contacts the workpiece is given, and the power applied to the motor is set smaller. When an output from the workpiece sensor varies, the power applied to the motor is controlled in accordance with one of an output from the scale and that from the workpiece sensor the speed variation of which is larger than that of the other.

Abstract: An offset signal for failure detection, that cannot be removed if an input signal line is broken is applied from an offset application circuit with output impedance higher than impedance of a differential transformer to an output signal of the differential transformer. A drive signal applied to a differential transformer is generated in digital form and an offset correction and a gain correction to output of the differential transformer are made in digital form for making controls necessary.