摘要:
An image-wise exposure apparatus comprises a light source for producing recording light, to which a photosensitive material is to be exposed, and a spatial modulation device provided with a plurality of picture elements located in the form of a two-dimensional array. The spatial modulation device raster-scans the picture elements and thereby carries out spatial modulation of the recording light. A picture element shifting device changes the optical relationship between the spatial modulation device and the photosensitive material. A controller sets all of the picture elements of the spatial modulation device to a totally closed condition for a single frame period and drives the picture element shifting device while all of the picture elements of the spatial modulation device are being in the totally closed condition. Effects of a picture element shifting operation are thereby obtained sufficiently, and image-wise exposure is carried out quickly.
摘要:
An image-wise exposure apparatus comprises a light source for producing recording light, to which a photosensitive material is to be exposed, and a spatial modulation device, which is provided with an array of picture elements and carries out spatial modulation of the recording light. A shifting device changes the optical relationship between the spatial modulation device and the photosensitive material. In cases where the number of exposure dots formed on the photosensitive material is increased by a factor of m with a picture element shifting step carried out with respect to a certain array direction of the picture elements, and the period, with which periodical nonuniformity in image density obtained by exposure occurs with respect to the array direction of the picture elements when the shifting step is not carried out, is n times as long as the pitch between the picture elements, the distance of shift of the picture elements with respect to the array direction of the picture elements is set to be approximately (n.+-.1)/m times as long as the pitch between the picture elements.
摘要:
An image exposing apparatus two-dimensionally scans a printing plate precursor with a light beam modulated based on an image signal to carry out image exposure on the printing plate precursor. The image exposing apparatus includes exposing device for emitting a light beam in a pulsed form with a predetermined pulse repetition period onto the printing plate precursor; branching device for branching at least a part of the light beam emitted from the exposing device; a pulse stretcher for stretching a pulse width of a branch beam branched by the branching device; synchronous signal generator for generating a synchronous signal synchronized with the pulse repetition period of the light beam from the branch beam having the pulse width stretched by the pulse stretcher; and modulating device for modulating the light beam emitted from the exposing device with an image exposure period synchronized with the synchronous signal.
摘要:
A light modulating device comprising a plurality of light modulating elements modulating the light that is incident thereto and emitting the light, wherein each of the light modulating elements is formed from a micro electronic machinery which is two-dimensionally arranged, and the transmittance can be controlled so as to vary for each of the light modulating elements. The light modulating device further comprises a lens array on a light-incident side of the light modulating elements, and the lens array condenses the incident light, which impinges on each of the light modulating elements, into a region whose area is smaller than an area occupied by each of the light modulating elements at a light-incident side thereof. Consequently, the light modulating device, in which usability of the light is improved and resolution is increased in the projection exposure, and the exposure apparatus using the same can be obtained.
摘要:
An image-wise exposure apparatus includes a mirror array device comprising a plurality of small mirrors which are two-dimensionally arrayed in two directions normal to each other and a drive mechanism for changing the orientations of the respective small mirrors independently from each other so that light impinging upon each of the small mirrors is reflected selectively in one of a first direction in which the reflected light impinges upon the photosensitive material and a second direction in which the reflected light does not impinge upon the photosensitive material. A control circuit controls the drive mechanism according to an image signal. In the image-wise exposure apparatus, picture element shifting is carried out. There is provided an antireflective mask which limits the effective aperture of each small mirror to a continuous region not longer than 1.5 a/m as measured in a direction in which the picture element shifting operation is carried out, wherein a represents the mirror pitches in the direction of the picture element shifting and m represents the times by which the number of exposure dots are multiplied by the picture element shifting in the direction.
摘要:
An image-wise exposure apparatus includes a mirror array device comprising a plurality of small mirrors which are two-dimensionally arrayed in two directions normal to each other and a drive mechanism for changing the orientations of the respective small mirrors independently from each other so that light impinging upon each of the small mirrors is reflected selectively in one of a first direction in which the reflected light impinges upon the photosensitive material and a second direction in which the reflected light does not impinge upon the photosensitive material. A control circuit controls the drive mechanism according to an image signal. In the image-wise exposure apparatus, picture element shifting is carried out. There is provided an antireflective mask which limits the effective aperture of each small mirror to a continuous region not longer than 1.5 a/m as measured in a direction in which the picture element shifting operation is carried out, wherein a represents the mirror pitches in the direction of the picture element shifting and m represents the times by which the number of exposure dots are multiplied by the picture element shifting in the direction.
摘要:
A radiation image read-out apparatus comprises a stimulating ray source constituted by many point light sources for sequentially emitting stimulating rays onto a portion of a stimulable phosphor sheet carrying a radiation image stored therein, and a line sensor constituted by many solid state photoelectric conversion devices. The line sensor extends over the length of the portion of the stimulable phosphor sheet linearly exposed to stimulating rays. Light emitted by the exposed portion of the stimulable phosphor sheet is received and photoelectrically converted by the solid state photoelectric conversion devices. The stimulating ray source and the line sensor are moved with respect to the stimulable phosphor sheet in a main scanning direction normal to the array of the solid state photoelectric conversion devices, and then moved with respect thereto in the array direction each time one main scanning step is finished.
摘要:
An optical shutter array comprising a transparent substrate of a material exhibiting an electrooptic effect having parallel channels and electrodes of a conductive resin composition disposed in the channels can be driven with a lower voltage while minimizing cross-talk. Contact pads on the channel electrodes facilitate wire bonding to the electrodes, and a transparent dielectric film covering the substrate surface prevents damage to the electrodes by air discharge and provides abrasion resistance. The use of an anisotropic conductive connector and a flexible printed wiring connector ensures simple positive wire connection.
摘要:
An electrophotographic photosensitive material comprising an electrically conductive support and a photoconductive layer of amorphous silicon containing a silicon atom and a hydrogen atom and/or a halogen atom provided said support, which comprises a low-photoconductive overcoat layer of amorphous silicon containing a carbon atom in a ratio of 5 to 35 atomic % on said photoconductive layer.
摘要:
An electrophotographic light-sensitive material is described, comprising an electrically conductive support, an amorphous silicon photoconductive layer on the support, and a layer of amorphous material containing at least carbon and halogen atoms is provided on the photoconductive layer. This material is free from a serious reduction in resolving power as is encountered in conventional electrophotographic light-sensitive materials when they are exposed to corona discharge, particularly negative corona discharge under high temperature/humidity conditions.