摘要:
An image displaying apparatus displaying a color image with favorable quality on a predetermined surface comprises; light source unit for emitting light beams within different wavelength ranges optically modulated by image information; light combining unit for combining light beams from the light source unit into a light beam; scanning unit for scanning a scanned surface with the light beam from the light combining unit and forming image thereon; and controlling unit for synchronously controlling the scanning unit and the light source unit, wherein dividing unit for dividing a light beam into light beams is provided within an arbitrary optical path on light-incident side of the scanning unit; receiving unit and adjustment unit for adjusting quantity of light emission of one or more light source unit based on the light quantity received by the receiving unit are provided on one of the optical paths divided by the dividing unit.
摘要:
An image projection apparatus includes a light modulation system, a projection optical system for projecting a two-dimensional image onto a surface to be projected with light from the light modulation system, and an image signal processing unit for supplying an image signal to the light modulation system. A power supplying portion supplies power to the light modulation system, a head portion contains the projection optical system, and a main body portion contains the power supplying portion. In addition, a drive connection portion connects the head portion with the main body portion, in which the head portion and the main body portion can be relatively driven.
摘要:
A diffraction optical device includes a first diffraction element and a second diffraction element arranged adjacent to each other. One of the first diffraction element and the second diffraction element has a positive power, and the other has a negative power. The first diffraction element reduces the incident angle of light upon the second diffraction element. As a result, a lowering of diffraction efficiency due to the dependency thereof upon the incident angle of light is suppressed, and flare light is prevented from occurring due to diffracted light of unnecessary orders.
摘要:
An image projection apparatus according to the present invention includes: a light modulation system; a projection optical system for projecting a two-dimensional image onto a surface to be projected with light from the light modulation system; an image signal processing unit for supplying an image signal to the light modulation system; a power supplying portion for supplying power to the light modulation system; a head portion that contains the projection optical system; a main body portion that contains the power supplying portion; and a drive connection portion for connecting the head portion with the main body portion, in which the head portion and the main body portion can be relatively driven.
摘要:
A scanning type image display optical system of the present invention comprises: a reflecting surface; an optical scanning unit which forms a two-dimensional image on the reflecting surface by light scanning; and an ocular optical system which leads light from the two-dimensional image formed on the reflecting surface to an observer.
摘要:
The invention provides a method and apparatus for caching data in a highly efficient fashion during a data reproducing process thereby reducing the access time. In the case where it is determined that the type of a data request is not a sequential data request, the cache memory is divided into a plurality of memory segments and data is stored in a particular memory segment so that the existing data buffered in the cache memory is further kept in the respective segments without being entirely purged even in a mode other than the sequential reading mode. This makes it possible that the data kept in the cache memory (without being purged) is used, for example, in a two-point reading operation performed in response to the following data transfer request. Yet, even in the random reading mode, the data buffered in the past is kept in the divided segments of the cache memory as long as possible so as to maximize the probability that requested data can be found in the cache memory in the future operations. On the other hand, in the case where it is determined that the type of a data request is a sequential data request, data is buffered in the cache memory using it as a single ring memory in such a manner as to efficiently use the capacity of the cache memory thereby increasing the cache-hit probability.
摘要:
A thin film of molten polypropylene resin extruded from a T die is pressed and cooled with a chill roll equipped with a hologram relief master plate on its peripheral surface, whereupon a hologram pattern is simultaneously formed as an integral part of the polypropylene resin sheet being molded. Since the polypropylene resin has a Rockwell hardness of at least 70, the hologram pattern formed in the resulting hologram forming sheet is less likely to be damaged or lost during subsequent processing.
摘要:
A laser apparatus includes a laser medium; a light source that radiates light to the laser medium, thereby exciting the laser medium and raising the temperature thereof; a reflecting unit having a first plane that reflects light within a predetermined wavelength range from light generated by excitation of the laser medium; and an output mirror disposed opposite the reflecting unit, with the laser medium being interposed therebetween, and causing laser oscillation by inducing resonance of the light within a predetermined wavelength range between the first plane and the output mirror. The reflecting unit is configured to be movable between a position in which light resonance is induced between the output mirror and the first plane and the laser apparatus is set to an oscillation state and a position in which the laser apparatus is set to a non-oscillation state.
摘要:
An electrical cable holder has a holder body having a fixing device (for example, anchor part) and a fastening part positioned beneath the fixing device (for example, anchor part) for provisionally placing an electrical cable (for example, power transmission cable); and a movable arm movably supported on the holder body for fastening the electrical cable (for example, power transmission cable) provisionally placed in the fastening part, between the movable arm and the fastening part. A lock device for locking the movable arm in a fastening state, in which the electrical cable (for example, power transmission cable) is fastened by the fastening part, is provided between the movable arm and the fastening part. A stationary device for maintaining a non-fastening state is provided between the holder body and the movable arm.