Abstract: The present invention is intended to provide a corneal surgery apparatus which enables a surgical operator to accurately ablate a cornea in part. The corneal surgery apparatus for ablating part of a cornea by irradiating a laser beam onto the cornea of a patient's eye comprises an irradiation optical system for irradiating the laser beam emitted from a laser light source onto the cornea, an aperture, which is disposed in the irradiation optical system, profiling a cross-sectional region of the beam perpendicular to an optical axis of the irradiation into one or more small regions, and correcting device for correcting an intensity distribution of the laser beam, which is changed when the beam passes through the aperture, to a specified intensity distribution.

Abstract: A gas laser apparatus includes a chamber in which laser medium gas is sealingly filled; a pair of main discharge electrodes arranged opposite to each other in the chamber; and a fan disposed in the chamber; wherein the chamber has an inner wall of a substantially elliptic shape in a plane perpendicular to a lengthwise direction of the chamber, and a part of the inner wall being between the fan and the main discharge electrodes serves as a guide for guiding the gas made to flow by the fan toward the main discharge electrodes.

Abstract: A laser treatment apparatus for performing treatments on a patient's eye by irradiating a laser beam is provided with an observation optical system including eyepieces through which a patient's eye is observed, wherein the brightness of a display part for displaying setting information such as laser irradiation conditions and others is controlled based on the light reception quantity detected by a light quantity detecting device.

Abstract: A laser apparatus for generating laser beams of predetermined wavelengths comprises a solid-state laser medium for generating a light beam having predetermined at least three fundamental wavelengths, at least three wavelength converters which respectively convert the light beam into harmonics corresponding to three primary colors of blue, green, and red, the wavelength-converter being circumferentially arranged, wavelength-converter holder for holding the wavelength converters, light blocking portions disposed between the wave length converters; rotating unit for rotating the wavelength-converter holder, thereby repeatedly positioning each of the wavelength converters and each of the light blocking portions on an optical axis of the solid-state laser medium, and a laser resonant optical system which resonates the light beams generated by the solid-state laser medium and outputs the harmonics converted by the wavelength converters.

Abstract: A television receiving apparatus having a video tape recorder unit therein with a function for preventing an electric shock, for preventing a user from inserting his fingers into a cabinet when the video tape recorder unit is removed from the cabinet for repair or the like, includes a locking mechanism for locking a controller door panel at a position where it is closed. The controller door panel is used for operating the video tape recorder unit contained in the apparatus. In order to surely obtain security of the user even when the locking operation is forgotten, the apparatus further includes a mechanism for interrupting supply of electric power to a television receiver when the absence of the video tape recorder unit in the cabinet is detected and when the controller door panel is detected to be opened at and more than a predetermined angle. A possibility that the user will receive an electric shock can thus be eliminated.

Abstract: A casing for use in a television set has a U-shaped frame for firmly supporting the cathode ray tube and a chassis arrangement for supporting a circuit arrangement for driving the cathode ray tube. An escutcheon is secured to the frame at a position in front of a screen of the cathode ray tube. A protection cover is connected to the frame for covering the cathode ray tube. Thus, the frame, chassis arrangement, escutcheon and protection cover taken together define an integral unit which is a semi-completed product that can be shipped from a factory. The casing further has a cabinet provided over the protection cover for covering and decorating the appearance the television set, and a back cover for enclosing the integral unit in the cabinet. The cabinet and the back cover can be applied at a local distribution station in accordance with the desire of the user.