Asahi Glass Company, Limited

Mitsubishi Electric Corporation

Kei Iwata

Masaaki Takata

Yusuke Nakagawa

Koji Masumoto

Yuki Tamura

Tomonori Ogawa

Takuya Nakagawa

Ryohei Uno

Ryusuke Morita

Long Shao

Kenjiro Motomura

Takao Uto

Takuya Sakuma

A motor includes an annular core formed by stacking a plurality of electromagnetic steel sheets; end plates disposed at both ends of the core in an axial direction; a balance weight disposed on a side of one of the end plates, the side being opposite the core; and a spacer disposed between the one of the end plates and the balance weight, the spacer being configured to create a space between the one of the end plates and the balance weight. The motor is entirely fastened by allowing at least one of a plurality of rivets arranged in a circumferential direction of the core to pass through the core and the end plates in the axial direction, and allowing remaining at least one rivet to pass through the core, the end plates, the spacer, and the balance weight in the axial direction.

Motor including a balance weight and compressor provided with the same

The present invention relates to an optical member for deep ultraviolet having a wavelength of 250 nm or shorter, containing a synthetic silica glass which does not substantially contain a halogen element, has a maximum OH group content of less than 10 ppm by weight, has contents of ODC (oxygen deficient centers) and E-prime center of each less than 1&#xd7;10cm, does not substantially contain SiH and peroxy linkage, and has a fictive temperature of 1,050&#xb0; C. or lower.

Optical member for deep ultraviolet and process for producing same

The present invention provides a synthetic silica glass for an optical member in which not only a fast axis direction in an optical axis direction is controlled, and a birefringence in an off-axis direction is reduced, but a magnitude of a birefringence in the optical axis direction is controlled to an arbitrary value, such that an average value of a value BR cos2&#x3b8;defined from a birefringence BR and a fast axis direction &#x3b8;as measured from a parallel direction to the principal optical axis direction is defined as an average birefringence AveBR cos2&#x3b8;, and when a maximum value of a birefringence measured from a vertical direction to the principal optical axis direction of the optical member is defined as a maximum birefringence BRin an off-axis direction, the following expression (1-1) and expression (2-1) are established:&#x2212;1.0&#x2266;AveBR cos2&#x3b8;&#x3c;0.0&#x2003;&#x2003;(1-1)0.0&#x2266;BR&#x2266;1.0&#x2003;&#x2003;(2-1).

Synthesized silica glass for optical component

The present invention provides a process for producing a porous quartz glass base, which comprises hydrolyzing a silicon compound in an oxyhydrogen flame in a reaction furnace to generate and deposit fine silica particles on a starting member, thereby forming a porous quartz glass base, wherein a gas discharge pipe for discharging an unnecessary gas from the reaction furnace is heated. According to the present invention, fine silica particles can be prevented from adhering to a gas discharge pipe for discharging the unnecessary hydrogen chloride gas generated in producing a porous quartz glass base.

Process and apparatus for producing porous quartz glass base

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Tokyo, Japan

Kei Iwata