China Building Materials Academy Co., Ltd.

China Building Materials Academy

China Institute of Water Resources and Hydropower Research

Jinsheng Jia

Lei Zhang

Yue Zhao

Xian Wei Zhang

Haoyang Yu

Xiaofeng Tang

Puguang Song

Zhiheng Fan

Yu Shi

Huichao Xu

Yonggang Huang

Yun Ting Wang

Yang Fu

Yajie Du

Yun Wang

Jiuwang Wang

Changhua Hong

Aixin Wang

Zhenbo Cao

Yang Wang

Hui Liu

Jing Yan Ma

Chang Liu

Hua Cai

Ang Li

Tianjie Lei

Wanli Shi

Shuguang Li

Wenjing Qin

Jiao Lian

Tiezhu Bo

Shiyong Xie

Shuaiqi Li

Cuiying Zheng

Zhongwei Liu

Lianying Ding

Yangfeng Wu

The present invention discloses a fabrication method and use of a Φ40 mm sized fiber optic image inverter, belonging to the field of manufacturing of fiber optic imaging elements. The light-absorbing glass for preparing the Φ40 mm sized fiber optic image inverter consists of the following components in molar percentage: SiO60-69.9, AlO1.0-10.0, BO10.1-15.0, NaO 1.0-8.0, KO 3.0-10.0, MgO 0.1-1.0, CaO 0.5-5.0, ZnO 0-0.1, TiO0-0.1, ZrO0.1-1.0, FeO3.0-6.5, CoO0.1-0.5, VO0.51-1.5 and MoO0.1-1.0. The Φ40 mm sized fiber optic image inverter has the advantages of low crosstalk of stray light, high resolution and high contrast.

Fabrication method and use of F40 mm large-size and high-contrast

The present application discloses a method for fabricating a fiber optic image inverter with an ultra-short twister. The method includes: drawing a glass rod with a low refractive index and a high strain point temperature into a surrounding pipe fiber; drawing a glass rod with a high refractive index and a high transmittance into a filling glass fiber, and then drawing into a casing pipe absorption fiber; uniformly surrounding an outer side of a cladding glass pipe with the surrounding pipe fiber, and matching a core glass rod and the cladding glass pipe to be drawn into a mono fiber; and then performing fabrication of a multi fiber, fabrication of a multi-multi fiber, heat press fusion and twisting operation in sequence. The fiber optic image inverter with an ultra-short twister with a high resolution and a high contrast and clear imaging is obtained and applied in a low-light-level image intensifier.

Fiber optic image inverter with ultra-short twister, fabrication method therefor, application thereof, and related composition

A capillary array includes a capillary region, including capillaries of a first glass, which are disposed in an axis-parallel manner. A low refractive index layer is disposed on an inner wall of each of the capillaries, the refractive index of each low refractive index layer being less than a refractive index of a liquid scintillator. A second glass material is disposed between adjacent capillaries. A softening point of the first glass is T, a softening point of second glass is T, and a value of Tminus Tis in a range from 30° C. to 50° C. A thermal expansion coefficient of the first glass is α. An edge covering region is disposed on an outer side of the capillary region and makes contact with an outer side face of the capillary region, wherein a material of the edge covering region is a third glass.

Capillary array and preparation method and application therefor

The present invention discloses a glass with high refractive index for fiber optic imaging elements with medium-expansion and fabrication method therefor, the glass comprising the following components in percentage by weight: SiO5-9%, AlO0-1%, BO23-28%, CaO 0-3%, BaO 6-12%, LaO30-34%, NbO4-8%, TaO0-1%, YO0-1%, ZnO 4-9%, TiO4-8%, ZrO4-6%, SnO0-1%. The present invention further provides a fabrication method for the glass with a high refractive index, comprising: putting raw materials quartz sand, aluminum hydroxide, boric acid or boric anhydride, calcium carbonate, barium carbonate or barium nitrate, lanthanum oxide, niobium oxide, tantalum oxide, yttrium oxide, zinc oxide, titanium dioxide, zirconium oxide and stannic oxide, etc. into a platinum crucible according to the requirement of dosing, melting at a high temperature, cooling and fining, leaking and casting to form a glass rod, and then annealing, cooling and chilling the molded glass rod.

Glass with high refractive index for fiber optic imaging element with medium-expansion and fabrication method therefor

A fiber optic imaging element includes medium-expansion and a fabrication method including: (1) matching a core glass rod with a cladding glass tube to perform mono fiber drawing; (2) arranging the mono fibers into a mono fiber bundle rod, and then drawing the mono fiber bundle rod into a multi fiber; (3) arranging the multi fiber into a multi fiber bundle rod, and then drawing the multi fiber bundle rod into a multi-multi fiber; (4) cutting the multi-multi fiber, and then arranging the multi-multi fiber into a fiber assembly buddle, then putting the fiber assembly buddle into a mold of heat press fusion process, and performing the heat press fusion process to prepare a block of the fiber optic imaging element with medium-expansion; and (5) edged rounding, cutting and slicing, face grinding and polishing the prepared medium-expansion block into a billet.

Fiber optic imaging element with medium-expansion and fabrication method therefor

A method for cemented material dam construction based on whole-process quality control includes: determining a water-binder ratio of a sand and gravel material through a simulation test; laying rockfill on the first cemented sand and gravel layer before the final setting time of the first cemented sand and gravel layer; adjusting the maximum particle size of the rockfill and the distance between the particles in the rockfill according to the design requirements; spraying a cement slurry on the rockfill to wrap all the particles in the rockfill and laying a second cemented sand and gravel layer before the initial setting time of the cement slurry; performing rolling compaction on the construction layer until the decline in the thickness of the construction layer and the apparent density of the rolled surface meet the design requirements; and completing the cemented material dam construction.

Method for cemented material dam construction based on whole-process quality control

Growing community of inventors

Beijing, China

Jinsheng Jia