Abstract:
The invention provides a laser etching method for optical ablation working by irradiating a work article formed of an inorganic material with a laser light from a laser oscillator capable of emitting in succession light pulses of a large energy density in space and time with a pulse radiation time not exceeding 1 picosecond, wherein, in laser etching of the work article formed of the inorganic material by irradiation thereof with the laser light from the laser oscillator with a predetermined pattern and with a predetermined energy density, there is utilized means for preventing deposition of a work by-product around the etching position.
Abstract:
At least one exemplary embodiment is directed to an image display device which includes a first TN liquid crystal modulator for modulating the polarization state of first colored light; a second TN liquid crystal modulator for modulating the polarization state of second colored light; a third TN liquid crystal modulator for modulating the polarization state of third colored light; and an optical system for synthesizing the image light emitted from the three liquid crystal modulators; where a first voltage is applied to the first liquid crystal modulator for providing the first colored light with about half-wavelength phase difference; second voltage higher than the first voltage is applied to the second liquid crystal modulator for providing the second colored light with about half-wavelength phase difference; and third voltage higher than the second voltage is applied to the third liquid crystal modulator for providing the third colored light with about half-wavelength phase difference.
Abstract:
At least one exemplary embodiment is directed to an image display device which includes: a first TN liquid crystal modulator for modulating the polarization state of first colored light; a second TN liquid crystal modulator for modulating the polarization state of second colored light; a third TN liquid crystal modulator for modulating the polarization state of third colored light; and an optical system for synthesizing the image light emitted from the three liquid crystal modulators; where a first voltage is applied to the first liquid crystal modulator for providing the first colored light with about half-wavelength phase difference; second voltage higher than the first voltage is applied to the second liquid crystal modulator for providing the second colored light with about half-wavelength phase difference; and third voltage higher than the second voltage is applied to the third liquid crystal modulator for providing the third colored light with about half-wavelength phase difference.
Abstract:
The invention provides a laser etching method for optical ablation working by irradiating a work article formed of an inorganic material with a laser light from a laser oscillator capable of emitting in succession light pulses of a large energy density in space and time with a pulse radiation time not exceeding 1 picosecond, wherein, in laser etching of the work article formed of the inorganic material by irradiation thereof with the laser light from the laser oscillator with a predetermined pattern and with a predetermined energy density, there is utilized means for preventing deposition of a work by-product around the etching position.
Abstract:
An image can be outputted with a high sharpness without deteriorating a resolution. In order to output an image of a high picture quality while suppressing the occurrence of a moire, an exposure amount is modulated in accordance with pixel density information of the image divided into pixels of a predetermined size by an exposure amount modulating unit in a light scanning unit, thereby expressing an image dark/light state. In this case, in a highlight density region in which a pixel density is equal to or less than ⅓ of the maximum image density, the density data of two adjoining pixels is modulated by one pixel and the other pixel is not recorded. In a density region in which the image density lies within a range from ⅓ to ½ of the maximum image density, a part of the density data of one of the two adjoining pixels is transposed to the other pixel. In a density region in which the image density is equal to or larger than ½ of the maximum density, the pixel transposition is not performed.
Abstract:
An image forming apparatus includes a movable photosensitive member, a slit for imagewise exposure of said photosensitive member to light in a slit exposure area having a width in a direction of movement of said photosensitive member, and a movable reflecting member for forming a non-image area on said photosensitive member by light from said reflecting member. When blank exposure is effected, the reflecting member is disposed at a first position or a second position. When the reflecting member is disposed at the first position, the light from the reflecting member is substantially condensed on or adjacent to an upstream end of the exposure area width on the photosensitive member with respect to the movement direction of the photosensitive member, and an area before an image area on the photosensitive member in which an image is formed by the slit exposure means is exposed to the light. When the reflecting member is disposed at the second position, the light from the reflecting member is substantially condensed on or adjacent a downstream end of the exposure area width on the photosensitive member, with respect to the movement direction of the photosensitive member, and an area after the image area is exposed to the light.
Abstract:
A light scanning apparatus comprises a light source having a plurality of light emitting unit, a deflector for deflecting a plurality of light beams emanated from the light source, a first optical system which is for focusing the plural light beams deflected by the deflector and which is afocal in a refractive power in a sub-scan direction and has an f-.theta. characteristic in a refractive power in a scan direction, and a second optical system which is for directing the light beams from the first optical system to a predetermined plane and is provided for each of the light beams.
Abstract:
An image forming apparatus includes an image carrier, an LED (light emitting diode) array having a plurality of light-emitting units arranged in correspondence with the longer direction of the image carrier, the width of the LED array being smaller than an image carrying width of the image carrier, and a projection unit for projecting and magnifying the light from the LED array upon the image carrier.
Abstract:
A liquid crystal display apparatus is disclosed which can prevent occurrence of flicker regardless of display modes. The apparatus includes a liquid crystal modulation element which includes a liquid crystal layer between a first electrode and a second electrode, a controller which controls a potential difference to be applied between the first and second electrodes. The apparatus operates in first and second modes, which are different in the light amount entering the element. A memory stores first information for the first mode and second information for the second mode as controlling information on a potential difference between the electrodes for suppressing flicker within a certain range. The controller controls the potential difference between the electrodes based on the first information when the first mode is set and controls the potential difference between the electrodes based on the second information when the second mode is set.
Abstract:
A liquid crystal display apparatus is disclosed which can prevent occurrence of flicker regardless of display modes. The apparatus includes a liquid crystal modulation element which includes a liquid crystal layer between a first electrode and a second electrode, a controller which controls a potential difference to be applied between the first and second electrodes. The apparatus operates in first and second modes, which are different in the light amount entering the element. A memory stores first information for the first mode and second information for the second mode as controlling information on a potential difference between the electrodes for suppressing flicker within a certain range. The controller controls the potential difference between the electrodes based on the first information when the first mode is set and controls the potential difference between the electrodes based on the second information when the second mode is set.