摘要:
The invention includes a first incidence plane, a second incidence plane, a third incidence plane, a first synthesis plane and a second synthesis plane that are interiorly orthogonal to each other. The first synthesis plane reflects light of a first color component that enters the first incidence plane, and transmits light of a second color component that enters the second incidence plane, having the first color component and the second color component, at least a portion of which has the same color component, and light of a third color component that enters the third incidence plane. The second synthesis plane reflects the light of the third color component that enters the third incidence plane, and transmits the light of the first color component that enters the first incidence plane and the light of the second color component that enters the second incidence plane. The light that enters the first, second, and third incidence planes is synthesized through the first synthesis plane and the second synthesis plane.
摘要:
An optical information recording/reproducing device is constituted of a focus control circuit connected to a controller, a tracking control circuit, a data processing circuit, and a card feed control circuit. The data processing circuit includes a plurality of I/V converters for converting signals received by a plurality of signal reproducing light receiving elements arranged to an optical detector into current/voltage, and a plurality of binary circuits each for converting the output from the I/V converters into a binary signal in a reference level. The data processing circuit includes a selector for selecting at least two outputs of a plurality of binary circuits. The data processing circuit includes a plurality of bit-clock producing circuits and a plurality of demodulation circuits. The bit-clock producing circuits produce bit clocks based on binary signals originated from selectors and a plurality of binary circuits which are not connected to the selectors. The demodulation circuits executes sampling the two binary signals in accordance with bit clocks and executes data demodulation using the sampled results. The data processing circuit includes a plurality of memories storing demodulated results from the plurality of demodulation circuits.
摘要:
There is provided An image projection apparatus comprising: a spatial light modulation element that modulates illumination light by switching the display and non-display statuses of the respective pixels based on pulse width modulation driving to perform gradation expression for each pixel; a light source section able to increase and decrease the amount of illumination light output according to an input controlled variable; a light source control section that periodically controls the light amount of the illumination light output from the light source section; and a projection optical section that projects images modulated by the spatial light modulation element, wherein the light source control section selectively controls the light amount of the illumination light output from the light source section by either one of a first mode in which the controlled variable is changed in a first control period that is shorter than the display period for the spatial light modulation element to display the input image information, and a second mode in which the controlled variable is changed in a second control period that is longer than the first control period.
摘要:
An illumination apparatus comprises a plurality of luminous bodies as light sources, luminous body drive portions configured to drive to light each of the plurality of luminous bodies, an optical member configured to lead and apply light exiting from a luminous body lighted by the luminous body drive portion to an illumination target area, a light control member configured to perform change of a light path of the light exiting from the luminous body with which the illumination target area is illuminated and/or movement of the luminous body, a movable portion configured to operably drive the light control member, and a light selection portion configured to control the movable portion and/or the luminous body drive portion in such a manner that light with which the illumination target area is selected from light exiting from the plurality of luminous bodies.
摘要:
An optical pickup comprises a plurality of light sources for generating recording and reproducing light of information, a plurality of optical elements for treating light beam generated from the light sources, light detecting means for detecting light beam in a optical path to adjust various characteristics of the light beam, and a recording medium, wherein resolution or resolving power in recording time and in reproducing time is adjusted to match to each other.
摘要:
In an optical card recording/reproducing apparatus having a multi-track read type optical head in which a reproducing light beam is radiated on a plurality of tracks on an optical card having a large number of tracks parallel to each other so as to cause a plurality of reproducing light-receiving elements to simultaneously reproduce data of the plurality of tracks on which the reproducing light beam is radiated, the light beam is moved such that the maximum or minimum address of addresses of the tracks irradiated by the light beam is located at the target track. After one multi-track reproduction is performed, the light beam is moved by the distance corresponding to the number of multi-tracks.
摘要:
In an optical head for reading information signals out of a plurality of information tracks on an optical record medium by projecting a slit-like light spot onto the optical record medium, a laser beam having a substantially elliptical cross section is passed through a stop having an aperture to shield both edge portions of the laser beam to obtain a laser beam having a uniform distribution. Then, the laser beam emanating from the stop is made incident upon a cylindrical lens have a negative power in a direction of a major axis of the laser beam to form a laser beam having a uniform distribution in a longitudinal direction. The thus obtained laser beam is projected onto the optical record medium by an objective lens such that the longitudinal direction of the slit-shaped laser beam spot is aligned with a direction substantially perpendicular to a track direction in which information tracks extend. In this manner, a plurality of information tracks are simultaneously illuminated uniformly, so that it is possible to obtain a plurality of information signals having substantially the same level.
摘要:
The invention includes a first incidence plane, a second incidence plane, a third incidence plane, a first synthesis plane and a second synthesis plane that are interiorly orthogonal to each other. The first synthesis plane reflects light of a first color component that enters the first incidence plane, and transmits light of a second color component that enters the second incidence plane, having the first color component and the second color component, at least a portion of which has the same color component, and light of a third color component that enters the third incidence plane. The second synthesis plane reflects the light of the third color component that enters the third incidence plane, and transmits the light of the first color component that enters the first incidence plane and the light of the second color component that enters the second incidence plane. The light that enters the first, second, and third incidence planes is synthesized through the first synthesis plane and the second synthesis plane.
摘要:
An illumination apparatus comprises an illuminant which radiates diffused light from an outgoing plane and generates heat, a light guiding member configured to guide the diffused light from the illuminant while reflecting the diffused light at the internal surface thereof, and a holding member configured to integrally hold the illuminant and the light guiding member at a predetermined interval. The light guiding member includes an incident end which is close to the outgoing plane of the illuminant, and into which the diffused light is incident and which is larger than the outgoing plane of the illuminant, and an outgoing end which is larger than the incident end. The holding member includes a heat conducting portion configured to conduct the heat generated at the illuminant, and a heat radiating portion configured to radiate heat from the heat conducting portion.
摘要:
A beam-spot control unit is arranged such that a light beam is irradiated onto an optical recording medium having a plurality of tracks, through an objective lens, to detect reflecting light of beam spots formed on the tracks by three or more photo detecting elements which are arranged in a direction corresponding to a track transverse direction. From a tracking error signal which is generated by a difference signal of pairs of photo detecting elements which are selected by a selecting switch from these photo detecting elements, a control signal is generated which positions the beam spots to a plurality of recording lines within a single track. A tracking control mechanism is utilized to enable positioning of the beam spots to a plurality of recording lines within the single track to be performed.