Abstract: A projector with a detection function according to the present disclosure includes: a projection optical system that projects image light on a projection plane; an irradiation optical system that generates an irradiation beam on the basis of light obtained from a light source, and outputs the irradiation beam, in which the irradiation beam is used for detection of a detection object on the projection plane, and the detection object is configured to be detected; an imaging device that scattered light of the irradiation beam derived from the detection object enters; and an illumination control section that performs temporal light-quantity modulation of the light obtained from the light source to cause coherence of the irradiation beam to be reduced.

Abstract: A projection display unit with a detection function includes a projection display section (110) and a detector (120). The projection display section (110) includes a display light source. The display light source emits light used as illumination light, and projects an image onto a projection surface with the illumination light. The detector (120) includes a detection light source that emits detection light. The detector (120) detects an object on or near the projection surface, and outputs a power-saving instruction signal to the projection display section (110) in accordance with a detection state of the object. The power-saving instruction signal instructs a transition to a power-saving mode. The projection display section (110) turns off the display light source in response to the power-saving instruction signal.

Abstract: An illumination unit includes a laser light source that intermittently emits laser light as a source of illumination light at a predetermined light emission frequency, a vibration device disposed in an optical path of the laser light, and a driver that vibrates the vibration device at a predetermined vibration frequency to change coherence of the laser light, in which, with respect to a design frequency fA that satisfies fA?0.5?f?A?fA+0.5, when a minimum value m (other than 0) that satisfies m(fA/fLD)?Round[m(fA/fLD)]=0 is determined, 3?m?6 is satisfied, where fLD is the light emission frequency and f?A is the vibration frequency.

Abstract: A projector with a detection function according to the present disclosure includes: a projection optical system that projects image light on a projection plane; an irradiation optical system that generates an irradiation beam on the basis of light obtained from a light source, and outputs the irradiation beam, in which the irradiation beam is used for detection of a detection object on the projection plane, and the detection object is configured to be detected; an imaging device that scattered light of the irradiation beam derived from the detection object enters; and an illumination control section that performs temporal light-quantity modulation of the light obtained from the light source to cause coherence of the irradiation beam to be reduced.

Abstract: A projection display unit with a detection function includes a projection display section (110) and a detector (120). The projection display section (110) includes a display light source. The display light source emits light used as illumination light, and projects an image onto a projection surface with the illumination light. The detector (120) includes a detection light source that emits detection light. The detector (120) detects an object on or near the projection surface, and outputs a power-saving instruction signal to the projection display section (110) in accordance with a detection state of the object. The power-saving instruction signal instructs a transition to a power-saving mode. The projection display section (110) turns off the display light source in response to the power-saving instruction signal.

Abstract: A recording medium records therein image data for distributing contents as element holograms with interference fringes generated by interference between an object beam representing the image data and a reference beam. The image data to be distributed which are recorded as the element holograms in the recording medium are reproduced by applying reference beams to the recording medium.

Abstract: A recording medium records therein image data for distributing contents as element holograms with interference fringes generated by interference between an object beam representing the image data and a reference beam. The image data to be distributed which are recorded as the element holograms in the recording medium are reproduced by applying reference beams to the recording medium.

Abstract: An optical recording medium which has an enhanced appearance or an enhanced design performance while computer data are recorded and a reproduction apparatus and method in which the optical recording medium is used are disclosed. When computer data are recorded on the optical recording medium on which recording data are recorded as interference fringes formed through interference of object light of images with reference light, related information of the recording data is recorded in a state wherein it can be recognized through the visual sense of the user.

Abstract: Reproduction reference light is irradiated on a hologram recording medium on which imaged digital data are recorded as a plurality of element holograms in the form of interference fringes obtained by interference between object light of the digital data and recording reference light. Then, a reproduction image obtained from the hologram recording medium by the irradiation of the reproduction reference light is detected. Then, readout data are produced based on the detected reproduction image. Thereafter, it is discriminated whether or not the readout data should be stored into a memory, and the readout data are stored into the memory in response to a result of the discrimination. Where a predetermined amount or more of the data is accumulated in the memory, reproduction data are produced from the readout data accumulated in the memory and then reproduced.

Abstract: In the present invention, by utilizing the difference between the polarization directions of an optical beam and a reflected optical beam, a neutral density filter part of a variable filter in an optical pickup reduces the light amount of the optical beam and directs the optical beam to the objective lens, and directs the reflected optical beam to a photodetector being a photodetection unit with slight change in the light amount of the reflected optical beam. When reducing a transmitted beam, which is the optical beam transmitted by diffracting the optical beam using a diffraction grating, the irradiation positions of first-order optical beams being diffracted±first-order optical beams on the recording layer of an optical disc are dispersed.

Abstract: A recording medium records therein image data for distributing contents as element holograms with interference fringes generated by interference between an object beam representing the image data and a reference beam. The image data to be distributed which are recorded as the element holograms in the recording medium are reproduced by applying reference beams to the recording medium.

Abstract: A recording medium records therein image data for distributing contents as element holograms with interference fringes generated by interference between an object beam representing the image data and a reference beam. The image data to be distributed which are recorded as the element holograms in the recording medium are reproduced by applying reference beams to the recording medium.

Abstract: A magneto-optical disk which reproduces information with an optical pickup head which uses an electromagnetic force as the driving force is provided. Other areas than at least the recording track are magnetized uniformly in a direction of canceling the influence of external magnetic field applied by the optical pickup head or a recording pattern having a frequency higher than modulation transfer function (MTF) of the optical pickup head is recorded to the other areas than at least the recording track. Read signals SP12 and SP14 from the magneto-optical disk are low in bit error rate.

Abstract: A recording medium records therein image data for distributing contents as element holograms with interference fringes generated by interference between an object beam representing the image data and a reference beam. The image data to be distributed which are recorded as the element holograms in the recording medium are reproduced by applying reference beams to the recording medium.

Abstract: An optical recording medium which has an enhanced appearance or an enhanced design performance while computer data are recorded and a reproduction apparatus and method in which the optical recording medium is used are disclosed. When computer data are recorded on the optical recording medium on which recording data are recorded as interference fringes formed through interference of object light of images with reference light, related information of the recording data is recorded in a state wherein it can be recognized through the visual sense of the user.

Abstract: A system is disclosed wherein a content is distributed without using a network. The distributed content is acquired and reproduced by a content acquisition apparatus.

Abstract: An information recording/reproducing apparatus for recording and reproducing information to and from a magneto-optical storage medium that includes a first magnetic layer for recording at least information, a second magnetic layer for regulating a switched connective force, and a third magnetic layer for shifting a magnetic wall of recorded markings for information reproduction. The three layers being stacked on a transparent substrate to make up the storage medium. The information recording/reproducing apparatus includes an optical head and a magnetic head. The optical head has a light source and an objective lens, the light source is configured to emit at least a laser beam with a wavelength of about 780 nm, the objective lens having a numerical aperture of about 0.45 and is configured to focus the laser beam from the light source into a beam spot for emission onto the magneto-optical storage medium. The magnetic head is for applying a recording magnetic field to the magneto-optical storage medium.

Abstract: A magneto-optical disk which reproduces information with an optical pickup head which uses an electromagnetic force as the driving force is provided. Other areas than at least the recording track are magnetized uniformly in a direction of canceling the influence of external magnetic field applied by the optical pickup head or a recording pattern having a frequency higher than modulation transfer function (MTF) of the optical pickup head is recorded to the other areas than at least the recording track. Read signals SP12 and SP14 from the magneto-optical disk are low in bit error rate.

Abstract: The present invention is a magneto-optical disk adopting the magnetic domain wall displacement detection type ultra-high resolution playback method. The magneto-optical disk has a recording track whose width Tw given as Tw≦0.046×(&lgr;/NA), where &lgr; is a wavelength of a laser light which is irradiated to a magneto-optical disk to play back recorded signals recorded on the magneto-optical disk and NA is a numerical aperture. Thus, the detrack tolerance can be 160 nmpp or more, which is contributed to easier design of the disk drive tracking.

Abstract: An information recording/reproducing apparatus for recording and reproducing information to and from a magneto-optical storage medium that includes a first magnetic layer for recording at least information, a second magnetic layer for regulating a switched connective force, and a third magnetic layer for shifting a magnetic wall of recorded markings for information reproduction. The three layers being stacked on a transparent substrate to make up the storage medium. The information recording/reproducing apparatus includes an optical head and a magnetic head. The optical head has a light source and an objective lens, the light source is configured to emit at least a laser beam with a wavelength of about 780 nm, the objective lens having a numerical aperture of about 0.45 and is configured to focus the laser beam from the light source into a beam spot for emission onto the magneto-optical storage medium. The magnetic head is for applying a recording magnetic field to the magneto-optical storage medium.