Abstract: An electronic imaging apparatus capable of obtaining high image quality that serves for printed photographs, e.g. DTP and posters. The apparatus has an image-forming optical system (1), a solid-state image pickup device (3), a signal processing device (4), and a sensor driving circuit (5). The image-forming optical system (1) includes a diffraction lens for correcting chromatic aberrations. The signal processing device (4) includes an image processing device for removing flare components due to unwanted orders of diffracted light produced by a diffraction surface. The image processing device obtains a flare component by performing the convolution of the point image energy intensity distribution of each unwanted order of diffracted light with the energy intensity distribution of an image signal, and subtracts the flare component from the image signal to obtain a corrected image signal.

Abstract: An invisible (stealth) information recording medium includes an underlying layer, an invisible information recording layer provided above the underlying layer, being invisible under visible light, and generates light upon being contacted with light having a particular wavelength except for visible light, thus becoming visible, and an optical modulation layer provided between the underlying layer and the recording layer, and optically modulating the fluorescent light which is generated in said invisible information recording layer and is emitted on the optical modulation layer.

Abstract: In an optical head for recording and reproducing information on and from an optical record medium such as optical disk and optical card including a semiconductor laser diode for emitting a laser beam having an elliptical cross sectional configuration, a collimator lens for converting the laser beam emitted from the laser diode into a parallel laser beam, a beam shaping prism for converting the laser beam emanating from the collimator lens into a laser beam having a circular cross sectional configuration, a transmissive diffraction grating for dividing the laser beam emanating from the beam shaping prism into a plurality of laser beams and an objective lens for projecting the laser beams emanating from the transmissive diffraction grating onto the optical record medium, in order to avoid the influence of a laser beam which is reflected by the transmissive diffraction grating and is made incident upon a laser emitting point of the laser diode, the transmissive diffraction grating is inclined with respect to an

Abstract: Disclosed is a heat-sensitive recording material comprising a support and a heat-sensitive recording layer provided on the support, the heat-sensitive recording layer comprises a dye precursor, a developer, a binder and an aromatic compound represented by the following structural formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are independently hydrogen atoms or lower alkyl groups; R.sup.4, R.sup.5 and R.sup.6 are independently hydrogen atoms, alkyl groups, cycloalkyl groups, alkoxy groups, halogen atoms, aralkyl groups, aryl groups, acyl groups, formyl groups, nitro groups or cyano groups; and X.sup.1 and X.sup.2 are oxygen atoms or sulfur atoms. This heat-sensitive recording material is excellent in heat responsiveness and sensitivity, and cause little thermal head stain.

Abstract: A heat-sensitive recording material comprising a support and a heat-sensitive recording layer provided on the support, said heat-sensitive recording layer comprising an electron-donating, colorless or pale-colored dye precursor, an electron-accepting developer which reacts with the dye precursor to form images upon heating, a binder, and a specific aromatic compound. The heat-sensitive recording material has an excellent heat responsiveness, and hence recorded images having a sufficient optical density can be printed even with low energy.

Abstract: There is disclosed a thermosensitive recording material comprising a support, an undercoat layer provided thereon and comprising a first layer formed on the support and containing a pigment; a second layer formed on the first layer and containing an ureaformaldehyde resin, and a thermosensitive recording layer provided on the undercoat layer and containing a dye precursor and a developer capable of developing the color of the dye precursor when heated.

Abstract: There is disclosed a thermosensitive recording material, comprising a support, a thermosensitive recording layer coated on said support and comprising a dye precursor and a color developer capable of developing a color of said dye precursor upon heating, and an porous undercoat layer comprising any one selected from water soluble polymers and latex resins and coated between said support and said thermosensitive recording layer.

Abstract: A thermosensitive recording material bearing an undercoat layer comprising fine organic hollow particles having a specific ratio of its wall thickness to its particle diameter provides excellent thermal response and minimizes foreign matters adhered to a thermal head.

Abstract: A SIT (Static Induction Transistor) image sensor with a high-sensitivity and a high-fidelity is disclosed. The image sensor comprises a SIT image cell array and a scanning circuit which scans in turn a plurality of SIT image cells in such a manner that respective scanning time in all the cells are equal throughout a sequential scanning operation for the SIT image sensor. A reading line and a refreshing line may be combined into a single line. A differential amplifier is provided for correcting a picture element information to remove a noise component therefrom.

Abstract: An objective for video disks comprising a first and second lens components, the first lens component being a positive cemented doublet, the second lens component being a positive meniscus lens, the objective for video disks being very light in weight and having aberrations such as spherical aberration, sine condition, etc. which are corrected favourably.

Abstract: A reproducing objective for video disks comprising a first, second and third lenses in which the first lens is a biconvex lens, the second lens is a negative meniscus lens, and the third lens is a positive meniscus lens, the reproducing objective for video disks being compact in size and light in weight and having a long working distance.

Abstract: An objective for video disks comprising a first, second, third and fourth lenses in which the first lens is a biconvex lens, the second lens is a negative lens, the third lens is a positive lens, and the fourth lens is a positive lens and for which N.A. is large and aberrations such a spherical aberration, astigmatism, etc. are corrected favorably.

Abstract: A reproducing objective for video disks comprising a first, second, third and fourth lenses in which the first lens is a biconvex lens, the second lens is a negative meniscus lens, and the third and fourth lenses are positive lenses and for which the working distance is large, flatness of image is high, resolving power is high and weight is extremely light.

Abstract: Tissues or cells of a living body, especially a human body, are automatically and successively cultivated in a nutrient solution filled culture container disposed in a gas-sealed culture box by detecting, within the culture box, a multiplication condition of the tissues or cells and culture conditions which are represented by temperature, humidity and gaseous atmosphere in the culture box and pH value of the nutrient solution, controlling the culture conditions and apparatus for subculture of the tissues or cells within the culture box in accordance with the information detected.

Abstract: An apparatus for automatically cultivating tissues or cells of a living body comprises a main body the inside of which is maintained in a predetermined atmosphere by an atmosphere control means. A container containing the tissues or cells and a nutrient solution is disposed in the main body and cultivated or multiplied tissues or cells in the container divided and fed for subculture into a plurality of empty cultivating containers disposed in the main body by an operating means which performs necessary operations for subculture. The atmosphere control means and the operating means are totally controlled by an apparatus control means.