Abstract: An optical information recording and/or reproducing apparatus includes an irradiating device for irradiating light polarized in a predetermined direction onto a magnetooptical recording medium having a plurality of tracks, the irradiating device includes an objective lens, having a curved surface, for converging the light irradiated onto the recording medium to form a micro spot, an applying device for applying a predetermined magnetic field to the recording medium and a detecting device for detecting interference light caused by interference of light produced by a magnetooptic effect of the recording medium and light produced by diffraction at the curved surface of the lens, and for reproducing recording information.

Abstract: An optical head includes an irradiating device for irradiating a recording medium with a light beam, a separating device disposed in an optical path between the recording medium and the irradiating device, which is provided for separating a portion of the light beam traveling from the irradiating device to the recording medium, and a detecting device for detecting the portion of the beam separated by the separating device, which has a plurality of sensor portions.

Abstract: An image displaying apparatus capable of displaying to an observer a more stereoscopic image with enhanced presence and realism. The apparatus has a display unit which irradiates a beam and an optical system which directs a light beam from said display to a pupil of an observer, a virtual image surface formed by said optical system being a curved surface.

Abstract: A pyran derivative has a structure ofR.sup.2 R.sup.3 C.dbd.(C.sub.5 H.sub.2 R.sup.1 O)--(CH.dbd.CH).sub.n --C.sub.6 H.sub.2 R.sup.6 R.sup.7 --NR.sup.4 R.sup.5wherein n is 3 or 4; R.sup.1 is a proton, alkyl or phenyl group; each of R.sup.2 and R.sup.3 is independently a cyano, alkoxycarbonyl having an alkyl, acyl having an alkyl, aracyl having phenyl, sulfonyl, aryl, or aryloxy; each of R.sup.4 and R.sup.5 is an alkyl group; and each of R.sup.6 and R.sup.7 is a proton, provided that R.sup.4 and R.sup.5 are alkyl groups, and a pair of R.sup.4 and R.sup.6 as well as a pair of R.sup.5 and R.sup.7 can be bonded to each other to form a heterocycle.A photosensitive composition comprises a polymerizable compound, a polymerization initiator and a photosensitizer which is the pyran derivative. A photosensitive resin composition comprises a crosslinkable polymer, a crosslinking agent and the photosensitizer.

Abstract: An optical information recording/reproducing apparatus realizes a direct verifying operation with a simple structure. A light beam emitted from a light source is converged on a track provided on an optical recording medium which is adapted to be moved relatively to the light beam. A super-resolution optical filter is provided in an optical path between the light source and the recording medium. The optical filter functions to produce a first light spot and a second light spot to be irradiated on the track such that the light intensity of the second light spot is lower than that of the first light spot and a recording signal is recorded using the first light spot. The signal recorded on the recording medium using the first light spot is reproduced by use of the reflected light caused upon the irradiation of the second light spot on the recording medium.

Abstract: A photo-crosslinkable resin composition comprises (a) a polymer having an electron-donating group in a monomer unit, (b) a halogen compound, (c) an onium salt and (d) at least one sensitizer selected from the group consisting of coumarin derivatives, rhodanine derivatives, thioxanthene derivatives and unsaturated cyclopentanone compounds. The composition can be used as a hologram recording medium.

Abstract: An optical information recording and reproducing apparatus for recording information pits on an information track by irradiating a light beam focused into a fine spot onto the information track of an optical information recording and reproducing medium, includes a device for forming a plurality of recording light spots on the information track transversely to the information track.

Abstract: An optical information recording/reproducing apparatus provided with a device for irradiating an information track of an optical information recording medium with a preheating light beam. Simultaneously, a recording/reproducing light beam irradiates a light spot of the preheating light beam on the recording medium. The light intensity of the preheating light beam is varied in accordance with the environmental temperature of the apparatus detected by a detector. By such a construction, the recording/reproducing condition of information is kept constant, irrespective of the environmental temperature.

Abstract: Disclosed is a method of recording information on a magnetooptical recording medium, which medium includes a first magnetic layer and a second magnetic layer having a lower Curie temperature and a higher coercive force at room temperature than those of the first magnetic layer. The second magnetic layer is exchange-coupled to the first magnetic layer. The first magnetic layer has a higher compensation temperature than the Curie temperature of the second magnetic layer. The method of recording information includes applying a magnetic field, which is modified in accordance with information from a magnetic head, to the medium to record information on the first magnetic layer and scanning the medium with a light beam to heat the medium to a temperature at least near the Curie temperature of the second magnetic layer so as to transfer the information recorded on the first magnetic layer to the second magnetic layer.

Abstract: An optical cutting method includes a step of detecting a center position on a sheet film with a position-detecting light flux; and a step of cutting out a disk film from the sheet film by projecting a cutting laser beam along circumference of a substantially circular form around the detected center position.

Abstract: An image processing method and apparatus for obtaining, from an original image, a natural mosaic image or an image of neo-impressionistic effect. In this method and apparatus, image information of one pixel is converted into information of a block of plural pixels (multi-level data), and the latter information is arranged randomly in the block.

Abstract: A still image processing method which can execute the effective flowing process is provided. In this method, when the flowing process is executed by shifting some or all of the pixels constituting a still image of one image plane in a predetermined direction, if no image information to be shifted exists at the first image position, the image information from elsewhere in the image plane is shifted to the second image position. The image information at the second image position is obtained by shifting the image information in the image plane in the direction opposite to the principal shifting direction.

Abstract: An image processing apparatus capable of extracting a particular image area from an image by designating a color hue of the desired particular image area. After indication on one or more points in an object region of interest, an initial range of hue or of brightness is designated, and a predetermined color is painted throughout a region adjacent to the indicated point(s) and having a hue or brightness, respectively, within the predetermined range. If that process results in the coloring of an area exceeding that which the operator desires to cover, the predetermined range of hue or brightness, as the case may be, is narrowed, and the process is repeated.

Abstract: As image processing method suitable for creative image generation in which the image data of an original image are divided into plural areas each consisting of plural pixels, the shape of these areas is modified according to the image data of the original image, and the pixel data in each area are processed in accordance with a representative value of the image data.

Abstract: There is an image processing apparatus to obtain a desired processed image by performing a predetermined image process to an input image. This apparatus comprises: an image input unit to input the image data; an image processor which can perform different image processes; a selector to select the kind of image process to be executed by the image processor; a memory to store different sample processed images which were subjected to the image processes; and a display to display both a sample image before execution of the image process and the sample processed image corresponding to the selected image process from the memory in accordance with selection by the selector. The image processor can perform the edge extracting process, mosaic process, and the like. With this apparatus, the operator can easily obtain various sample processed images and can extend the processed image of the original image by merely inputting a processing command.

Abstract: In the disclosed distance measuring device a light source projects a light on an object to be photographed and at least two photo-electric converters each with several light receiving areas receive light reflected by the object. The quantity of electric charge on these areas varies with the quantity of light incident thereon. An electric charge storage stores the electric charges produced at the two converters and a control determines the operation of the light receiving areas of the photo-electric converters according to the electric charge information produced.

Abstract: A photo-electric converting device includes storing parts which store electric charges obtained through a photo-electric conversion process respectively from reflected light received when light projection is performed by light emitting apparatus and another reflected light received when no light is projected by the light emitting apparatus. The device computes storage signals produced from the storing parts and detects an electric signal which corresponds solely to reflected light resulting from light projection performed by the light emitting apparatus.

Abstract: Disclosed is a light splitter in which a number of minute inclined surfaces inclined with respect to the surface of a parallel planar glass is formed. At least part of a light beam having entered the light splitter travels while being totally reflected by said surface and said inclined surfaces and the remainder of the light beam travels without being totally reflected by said inclined surfaces.

Abstract: Disclosed is an optical system for detecting the state of focus in which the exit pupil of an image-forming optical system is optically divided into a plurality of exit pupils by an optical member having a beam splitting element, the image-forming light beams from the divided exit pupils are used to form a plurality of image intensity distributions regarding an object image, sensor series each having a plurality of sensors and putting out signals corresponding to the image intensity distributions are disposed at positions whereat the plurality of image intensity distributions are formed, and the output signals from the sensor series are used to detect the relative position of the image intensity distributions to thereby discriminate the state of focus of the image-forming optical system.

Abstract: An area-type beam splitter is disposed across the optical path of an imaging optical system. Photodetector arrays are located across the optical path portions divided by the beam splitter. The photodetector arrays in the respective optical path portions are arranged in different positions from one another in such a manner that images different from one another in imaging performance will be read by the respective photodetector arrays.