Abstract:
The present invention relates to a light source apparatus with a structure that enables the brightness of a gas discharge tube to be stabilized and facilitates gas discharge tube maintenance work. The light source apparatus has a gas discharge tube, a lamp container housing the gas discharge tube, and a base on which the lamp container is fixed. The gas discharge tube is fixed via a heat insulating member to a portion of an outer shell of the lamp container, and the heat insulating member functions to reduce heat transfer between the lamp container and the gas discharge tube to reduce the influence of temperature change, outside the lamp container, on the gas discharge tube. The lamp container also has an attachment/detachment structure for enabling attachment and detachment of the portion of the outer shell on which the gas discharge tube is fixed via the insulating member, with respect to the remaining portion of the outer shell, and whereby the attachment/detachment structure facilitates gas discharge tube maintenance work.
Abstract:
A light source has a discharge vessel which is filled with a filling gas, and an electron beam source which is arranged in vacuum or in a region of low pressure. The electron beam source generates electrons which are propelled through an entry foil into the discharge vessel. An electric field may be generated inside the discharge vessel.
Abstract:
An arrangement for emitting light includes a hermetically sealed casing with a window, a layer of a fluorescent substance arranged within the casing covering at least a major part of the window, an electron emitting cathode arranged within the casing, and an anode. The casing is filled with a gas suitable for electron avalanche amplification. In operation, the cathode and anode are held at an electric potential such that said emitted electrons are accelerated and avalanche amplified in the gas. The layer of the fluorescent substance is arranged to emit light through the window in response to avalanche amplified electron bombardment and/or ultraviolet light emitted from the gas.
Abstract:
The invention relates to a light source (1) with a discharge vessel (2) which is filled with a filling gas, and with an electron beam source (4) arranged in vacuum or in a region of low pressure, which source (4) generates electrons (12) and propels them through an inlet foil (8) into the discharge vessel (2). According to the invention, the inlet foil (8) comprises a diamond layer.
Abstract:
The present invention relates to an arrangement for emitting light comprising: a hermetically sealed caving (4) including a transparent or translucent window (10); a layer (3) of a fluorescent substance arranged within said casing covering at least a major part of said window; an electron emitting cathode (1) arranged within said casing for emission of electrons; and an anode (2). Said caving is filled with a has suitable for electron avalanche amplification. Said cathode and anode are, during use, held at electric potentials such that said emitted electrons are accelerated and avalanche amplified in said gas: and said layer is arranged to emit light through raid window in response to being bombarded by avalanche amplified electrons and/or in response to being exposed to ultraviolet light as being emitted in the gas due w interactions between the avalanche amplified electrons and the gas.
Abstract:
A flange portion is integrally formed with a stem which forms a sealing envelope for a gas discharge tube. Accordingly, operation for building and fixing the flange portion is not necessary, so that lamp assembly operation is simplified, and mass production is facilitated. In addition, when a gas discharge tube is to be fixed to an external stem setting portion, lamp setting is enabled at higher precision by utilizing positioning holes formed in the flange portion in advance.
Abstract:
A source of light in the vacuum ultraviolet (VUV) spectral region includes a reflective UV-sensitive photocathode supported in spaced parallel relationship with a mesh electrode within a rare gas at low pressure. A high positive potential applied to the mesh electrode creates an electric field which causes drifting of free electrons occurring between the electrodes and producing continuous VUV light output by electric field-driven scintillation amplification sustained by positive photon feedback mediated by photoemission from the photocathode. In one embodiment the lamp emits a narrow-band continuum peaked at 175 nm.
Abstract:
The invention relates to a light source (1) with a discharge vessel (12) which is filled with a filling gas, and with an electron beam source (2) which is arranged in vacuum or in a region of low pressure and which generates electrons, propelling the latter through an entry foil (10) into the discharge vessel (12). According to the invention, an electric field can be generated inside the discharge vessel (12).
Abstract:
A gas discharge tube (1), wherein a side tube member (22) is formed of a metal, a metal joint portion (15b) being provided on an outer circumferential portion of a stem (4) and combined with a joint portion (16) of the side tube member (22), which comprises a metal, by welding, whereby it becomes possible to attain the facilitation of an assembling operation owing to the welding method, as well as the miniaturization of the gas discharge tube (1) itself, the handling efficiency of the gas discharge tube being also improved greatly since the side tube member (22) is formed to small dimensions and made of a metal, the side tube member (22) made of a metal promoting the diversification of the shape of the gas discharge tube (1) and promising mass-production thereof.
Abstract:
A gas discharge tube (1), wherein a gas is sealed in a sealed case (2) at least a part of which is light transmissible, to generate electric discharge between an anode (6) and a cathode (9) provided in the sealed case (2), whereby predetermined light is discharged from a light transmission portion (14a) of the sealed case (2) to the outside, comprising the anode (6) placed on an insulating anode support member (5), a converging electrode support member (7) placed on a surface, which surrounds the anode (6), of the anode support member and having an opening (7a) at which the anode (6) is exposed, a converging electrode (8) which has a converging opening (8a) at a front surface of the opening (7a) so that the opening (8a) projects toward the anode (6), and which is placed on the support member (7), and a cathode (9) placed on the anode support member (5) or converging electrode support member (7) so as to be spaced from the converging opening (8a).