摘要:
Disclosed are high purity synthetic silica material having an internal transmission at 193 nm of at least 99.65%/cm and method of preparing such material. The material is also featured by a high compositional homogeneity in a plane transverse to the intended optical axis. The soot-to-glass process for making the material includes a step of consolidating the soot preform in the presence of H2O and/or O2.
摘要翻译:公开了具有193nm以上的内透射率为至少99.65%/ cm 3的高纯度合成二氧化硅材料及其制备方法。 该材料的特征还在于横向于预期光轴的平面中具有高的组成均匀性。 用于制造材料的烟灰对玻璃工艺包括在H 2 O 2和/或O 2 2的存在下固化烟灰预制件的步骤。
摘要:
Disclosed is a synthetic silica glass optical material having high resistance to optical damage by ultraviolet radiation in the ultraviolet wavelength range, particularly in the wavelength less than about 250 nm and particularly, exhibiting a low laser induced wavefront distortion; specifically a laser induced wavefront distortion, measured at 633 nm, of between about −1.0 and 1.0 nm/cm when subjected to 10 billion pulses of a laser operating at approximately 193 nm and at a fluence of approximately 70 μJ/cm2. The synthetic silica glass optical material of the present invention comprises OH concentration levels of less than about 600 ppm, preferably less than 200 ppm, and H2 concentration levels less than about 5.0×1017 molecules/cm3,and preferably less than about 2.0×1017 molecules/cm3.
摘要翻译:公开了一种合成石英玻璃光学材料,其特征在于波长小于约250nm,特别是具有低激光诱导波前失真的紫外线波长范围内具有高抗紫外线辐射的光学损伤, 特别是在经受100nm脉冲激光在约193nm下操作的激光诱导波前失真(在633nm处),介于约-1.0和1.0nm / cm之间,并且流量约为70μJ/ cm 2 SUP>。 本发明的合成石英玻璃光学材料包含小于约600ppm,优选小于200ppm的OH浓度水平和小于约5.0×10 17 H 2 O 2浓度水平, SUP>分子/ cm 3,优选小于约2.0×10 17分子/ cm 3。
摘要:
Disclosed in the application are a synthetic silica glass having low fluence-dependent transmission, particularly at about 193 nm, and a process for making the same. The glass may desirably exhibit a low level of fluorescence at 290 and 390 nm when activated at about 248 nm. The glass may desirably exhibit low level of LIWFD, [SiH*] and/or [ODC].
摘要:
A method of forming an alkali metal oxide-doped optical fiber by diffusing an alkali metal into a surface of a glass article is disclosed. The silica glass article may be in the form of a tube or a rod, or a collection of tubes or rods. The silica glass article containing the alkali metal, and impurities that may have been unintentionally diffused into the glass article, is etched to a depth sufficient to remove the impurities. The silica glass article may be further processed to form a complete optical fiber preform. The preform, when drawn into an optical fiber, exhibits a low attenuation.
摘要:
A method of forming an alkali metal oxide-doped optical fiber by diffusing an alkali metal into a surface of a glass article is disclosed. The silica glass article may be in the form of a tube or a rod, or a collection of tubes or rods. The silica glass article containing the alkali metal, and impurities that may have been unintentionally diffused into the glass article, is etched to a depth sufficient to remove the impurities. The silica glass article may be further processed to form a complete optical fiber preform. The preform, when drawn into an optical fiber, exhibits a low attenuation.
摘要:
A multi-purpose hair coloring tool includes an elongated body and a plurality of bristles projecting from the body adjacent one end thereof. The bristles cooperatively define a serrated brush edge spaced from the body, with the brush edge being particularly effective in applying coloring agents to the hair. Adjacent the opposite end of the body is a hook which may be used for such techniques as cap highlighting or hair weaving.
摘要:
The present invention provides methods and systems for determining the play value of a playground, the challenge level of a playground, or both. In some embodiments, the methods and systems may propose modifications to a playground that would result in an effective and efficient increase in the play value of the playground, a desired increase or decrease in the challenge level of the playground, or both. Further, in some embodiments, the methods and systems may be configured to provide comparisons of various playgrounds in order to determine which playgrounds are of greatest play value. In some embodiments, the methods and systems may be incorporated into software that is configured for the design of playgrounds.
摘要:
The present invention provides methods and systems for determining the play value of a playground, the challenge level of a playground, or both. In some embodiments, the methods and systems may propose modifications to a playground that would result in an effective and efficient increase in the play value of the playground, a desired increase or decrease in the challenge level of the playground, or both. Further, in some embodiments, the methods and systems may be configured to provide comparisons of various playgrounds in order to determine which playgrounds are of greatest play value. In some embodiments, the methods and systems may be incorporated into software that is configured for the design of playgrounds.
摘要:
An ice bucket cover includes: (a) a substantially circular bottom wall; (b) a substantially cylindrically-shaped cover side wall attached at a bottom side wall edge to a periphery of the bottom wall, the side wall being made of a stretchable neoprene material; (c) a substantially circular, open top; (d) at least two same-sized ice bucket handle holes on opposite sides of the ice bucket cover; and (e) at least two pull tabs affixed to a top side wall edge of the ice bucket cover above the bucket handle hole, each pull tab being on an opposite side from the other pull tab; wherein the ice bucket cover is sized to closely fit over an outside surface of an ice bucket. Also included is a neoprene ice bucket cover pouch for enclosing and carrying an ice bucket, including: (a) the bottom wall; (b) the cover side wall attached at a bottom side wall edge to a periphery of the bottom wall, extending substantially perpendicularly from the bottom wall, and extending a substantial distance beyond an upper edge of the ice bucket; and (c) a closure mechanism for closing a top side wall edge of the pouch; wherein the ice bucket cover pouch has a substantially circular, open top when in an open position, the pouch being sized to closely cover an outside surface of the ice bucket.
摘要:
The present invention provides methods and systems for determining the play value of a playground, the challenge level of a playground, or both. In some embodiments, the methods and systems may propose modifications to a playground that would result in an effective and efficient increase in the play value of the playground, a desired increase or decrease in the challenge level of the playground, or both. Further, in some embodiments, the methods and systems may be configured to provide comparisons of various playgrounds in order to determine which playgrounds are of greatest play value. In some embodiments, the methods and systems may be incorporated into software that is configured for the design of playgrounds.