Ushio Denki Kabushiki Kaisha

Kabushiki Kaisha Nikon

Kenzo Kai

Hiroshi Sugahara

Takashi Mori

Tatsushi Igarashi

Yukio Yasuda

Yukiharu Tagawa

Yukihiro Morimoto

Toyohiko Kumada

Akihiko Sugitani

Akira Miyaji

Masanori Sugihara

Akiyasu Yamaguchi

Shigenori Nozawa

Tetuya Torikai

Kaoru Nakamura

Masanori Takahashi

Hideo Tanaka

Yasuo Oonishi

Minoru Asao

Kazunori Morikawa

Katuhiko Miyahara

A foil seal lamp in which even when a high temperature of the seal area is reached oxidation of the molybdenum metal foils and the molybdenum outer leads which have been placed in the seal area can be reliably prevented, and in which a long service life can be obtained. is achieved by providing the surfaces of the metal foil and the outer lead which are placed in the seal areas with protective coatings of crystalline molybdate. An increase in the amount of protective coating that can be carried is produced by surface roughening the outer leads.

Foil seal lamp

In order to provide an incandescent lamp in which an unlit state of the lamp caused by a hang-out of the coil as well as a short lifetime thereof are prevented using a simple construction and its lifetime in practical application is long, a coil ( )-like filament ( ) is held in a bulb ( ) by upholding parts ( &prime;) with an axis of the coil ( ) being oriented in a vertical direction, and a coil pitch of the coil ( ) at the upper part thereof is made narrow as compared with that of the lower part of the filament ( ). Or the filament ( ) of the incandescent lamp ( ) is constituted by the coil ( ) of a conical shape or that of a frustum of a circular cone, and the filament is arranged within the bulb ( ) in such a way that it may be held by upholding parts ( &prime;) with an axis of the coil ( ) of the filament ( ) being oriented in a vertical direction and the one end of the oil ( ) having a smaller diameter being positioned upward.

Coil filament structure for an incandescent lamp

The object of the invention to devise an electrical insertion body for a tube lamp in which sealing bodies of an electrically conductive inorganic material component and a dielectric inorganic material component and upholding parts of the electrodes are attached securely to one another by sintering, and in which neither leaks nor falling out of the upholding parts of the electrodes occur. The object is achieved as claimed in the invention, in an electrical insertion body for a tube lamp in which an upholding part of the electrode is inserted into the center opening of a respective sealing body of a functional gradient material for a tube lamp, in that in the boundary areas between the sealing bodies and the upholding parts of the electrodes one diffusion area at a time is formed, in which the electrically conductive inorganic material component of the sealing body, the metallic component of the upholding part of the electrode and a diffusion accelerator are present diffused into one another, which at the sintering temperature accelerates diffusion of the electrically conductive inorganic material component of the sealing body and of the metallic component of the upholding part of the electrode and that in this way the upholding part of the electrode and the electrically conductive inorganic material component of the sealing body are joined to one another.

Electricity lead-in body for bulb and method for manufacturing the same

A short arc lamp which has a lamp body in which a concave space is formed, a base plate which is located in a rear part of this body, a transparent part which is located in a front opening of the lamp body, with a frame part in its vicinity, and which hermetically encloses the concave space, and a pair of electrodes forming an arc gap in the concave space. The frame part is connected to a circular conductive ring which is provided with the roughly square cross section and is connected to the lamp body. At least a front side of the circular conductive ring is exposed to the ambient environment. A gap is formed between the frame part and the circular conductive ring. The frame part extends more to the front than the circular conductive ring, and on the exposed surface of the circular conductive ring and on a side of the projecting part of the frame part, step-like projections are formed.

Short arc lamp having a thermally conductive ring

A cadmium/inert gas discharge lamp of the short arc type, which suppresses an unnecessary emission upstream and downstream of the necessary emission spectra in a wavelength range of 210 to 230 nm, achieves a high efficiency of the emission spectra in the range 210 to 230 nm and can be used in very satisfactory manner for industrial applications. Also, a highly efficient projection exposure device through the incorporation of a cadmium/rare gas discharge lamp of the short arc type having good emission spectrum characteristics in the wavelength range 210 to 230 nm, which can transmit in projecting manner fine image patterns with a large depth of focus. The cadmium/rare gas discharge lamp of the short arc type is arranged within a temperature-regulated quartz bulb, and is provided with a pair of adjacently facing electrodes, together with inert gas selected from xenon, krypton, argon, neon or mixtures of them. Metal cadmium with a pressure of 14 to 200 kPa is encapsulated in the tube in a stationary lighting operation. The lamp is operated in such a way that J/P, i.e. the ratio between a discharge current in a stationary lighting operation J (A) and a cadmium pressure in a stationary lighting operation P (kPa) is in a range 0.13 to 15. Also, a projection exposure device, which has the above-described discharge lamp and a power supply for carrying out the lighting operation of the discharge lamp under the above-described condtions.

Cadmium/rare gas discharge lamp of the short arc type, as well as

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Himeji, Japan

Kenzo Kai