Abstract: An information input device and an information input method are provided which can provide portability to thereby improve manipulation flexibility and has a high manipulation resolving power. The device includes two relatively slidable plate-shaped input members held between fingertips or parts of fingers of a hand to slide relative to each other, and an information producing portion for producing input information in accordance with at least a relative position or a relative movement of the plate-shaped input members.

Abstract: A CPU (111) in a video reproducing device (100) permits a display section (320) of a television device (300) to display a menu screen (500) for operating functions of the video reproducing device (100) and the television device (300). The menu screen (500) is displayed as a part of a menu area (400). The menu area (400) is a single flat plane having no hierarchical structure, and various icon groups relating to categories to be included in the menu screen (500) are arranged in the menu area (400) by category.

Abstract: A communication system (1) is provided with: a first communication apparatus (100a); and a second communicating apparatus (100b), the first communicating apparatus is provided with: (i) a displaying device (110) which can perform high-speed modulation; (ii) a display dividing device (112) for dividing a display surface of the displaying device into a plurality of display blocks; and (iii) a controlling device (115) for controlling the displaying device to display a display pattern in each of the divided plurality of display blocks, the second communicating apparatus is provided with: (i) a light receiving device (120) for light-receiving the display pattern which is displayed on the displaying device; and (ii) an obtaining device (121) for obtaining the predetermined data on the basis of the light-received display pattern.

Abstract: It is an object of the invention to provide an information input device capable of performing a minute position input corresponding to a large display screen having a high resolution. The information input device comprises: a plate-like input member slidable by fingertip of one hand; an information creating section for creating input information in response to at least a relative position or a relative displacement of the plate-like member; and vibration generating device (an uneven surface and a convex portion) for generating a vibration by virtue of a relative movement of a sliding surface of the plate-like member. By propagating the generated vibration to fingertip, it is possible for an operator (user) to recognize an amount of a relative movement of the plate-like member.

Abstract: An information input device and an information input method are provided which can provide portability to thereby improve manipulation flexibility and has a high manipulation resolving power. The device includes two relatively slidable plate-shaped input members held between fingertips or parts of fingers of a hand to slide relative to each other, and an information producing portion for producing input information in accordance with at least a relative position or a relative movement of the plate-shaped input members.

Abstract: An information input device which has portability for the sake of improved operation flexibility, and has high operational resolution as well. The information input device comprises: two plate-like input members capable of being slid against each other, being held between fingertips or part of two fingers of one hand; a holding part to be held with other fingers of the one hand; connecting parts for connecting the two plate-like input members to the holding part; and an information creating part for creating input information in accordance with a relative position or relative movement between the plate-like input members.

Abstract: An optical transmission system which is capable of improving the stability of the system by appropriately adjusting a transmission data format and a transmitted optical output when a fault occurs on a transmission path, when a terminal is initiated, or when the transmission path is recovered from a fault. The optical transmission system comprises a first test signal supplying portion responsive to a detection of erroneous contents in a received signal received through the optical transmission path for supplying a test signal to the optical transmission path, a second test signal supplying portion responsive to a detection of a received signal received through the optical transmission path, which is equal to a test signal, and a communication stopping portion for stopping the transmission/reception of a signal through the optical transmission path when a frequency at which the erroneous contents are detected or a frequency at which the test signal is detected exceeds a predetermined threshold.

Abstract: A light signal receiving apparatus receives a light signal transmitted from a light signal transmitting apparatus disposed in a household room, and supplies video and audio information to a video equipment, and an audio equipment including an amplifier and a speaker. The light signal receiving apparatus includes an optical system condensing the light signal on a light-receiving element with a condensing lens. The light-receiving element is disposed nearer the condensing lens in relation to a focusing point of the condensing lens, and the condensing lens includes a non-spherical surface shape strongly distributing, on the light-receiving element, an intensity distribution on a light-receiving element disposed plane of an incident light obliquely incident with respect to an optical axis of the condensing lens within a range of predetermined angles. Thereby, the light signal incident on the condensing lens within a large range can be received at a predetermined light receiving intensity.

Abstract: An optical coupling device for coupling a semiconductor laser emitting a diverging laser light to a converging optical system converging the laser light onto a rectangle end surface of an optical wavelength converter, comprises: a rotator for rotating the semiconductor laser about an optical axis thereof; a collimator disposed in the optical axis for converting the diverging laser light to a parallel beam along the optical axis; and a polarization rotator for rotating a plane of the electric field vibration of the parallel beam about the an optical axis to guide the beam to the converging optical system, thereby controlling the plane of the electric field vibration direction of the fundamental wave to couple the fundamental wave to a rectangle end surface at a high efficiency.

Abstract: An optical wavelength converter includes an optical wavelength converting element having a multimode waveguide of a core of a nonlinear optical material with a high temperature dependency or temperature coefficient of an index difference for the fundamental wave and secondary harmonic and a clad surrounding the multimode waveguide for converting a wavelength of a fundamental wave entering the multimode waveguide to a 1/2 wavelength of a secondary harmonic; and a temperature tuning device for changing a temperature of the clad and the multimode waveguide within a predetermined temperature range to maintain a phase matching temperature of the fundamental wave and the secondary harmonic in the optical wavelength converting element. The temperature tuner changes the temperature coefficient so as to select a pertinent pair of the fundamental wave and secondary harmonic modes for a wavelength conversion.

Abstract: An optical wavelength converting device comprises; a semiconductor laser emitting a fundamental wave; a waveguide-type optical wavelength converting element having a core made of a nonlinear optical material and a clad surrounding the core; and a converging optical system for converging the fundamental wave onto an input end of the waveguide, characterized in that the device further comprises; an adjusting optical system for adjusting a quantity of backward light backed from the optical wavelength converting element to the semiconductor disposed in the coupling optical system; a reflecting portion for reflecting the fundamental wave disposed in the an optical wavelength converting element or the coupling optical system; a current controller for changing an electric current to be supplied to the semiconductor laser; and an optical-path-length stabilizing device comprising a supporting plate for supporting the semiconductor laser, the coupling optical system and the an optical wavelength converting element to k

Abstract: A laser light wavelength shifter is provided with a semiconductor laser. The semiconductor laser emits through mode-locked resonating action a mode-lock resonated light which serves as a fundamental wave and is in turn wavelength shifted. Accordingly, the wavelength shifting can be executed at high efficiency with the use of a simple arrangement.

Abstract: An optical pulse generating apparatus having a semiconductor laser medium and an external resonator comprising an optical waveguide path. A reflecting element in the optical guide path is given such a reflection wavelength characteristic as to suppress other components than the component of an oscillation main longitudinal mode, so that the level of the main longitudinal mode component is raised and optical pulses with a narrower spectrum width and pulse width are produced.

Abstract: Laser irradiating apparatus equipped with a vertical shaft fixed on a power supply box, a first arm which slides up and down along the shaft and rotates around the shaft and a second arm which is pivoted at the first arm tip portion, and with a laser head installed on the second arm. In this apparatus, an articulated arm light guide is fixed on the upper side of the laser head tip portion. Variation of positions of the first and second arms provides a wide range for operation and much compactness of the apparatus when storing. In addition, the laser head is soundly installed on the second arm upper surface, which is useful to prevent any optical deviation.