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INFRARED-TRANSMITTING GLASS SUITABLE FOR MOLD FORMING meetings

Foreign code F170008939
File No. (S2015-0888-N0)
Posted date Jan 20, 2017
Country WIPO
International application number 2016JP060776
International publication number WO 2016159289
Date of international filing Mar 31, 2016
Date of international publication Oct 6, 2016
Priority data
  • P2015-072911 (Mar 31, 2015) JP
Title INFRARED-TRANSMITTING GLASS SUITABLE FOR MOLD FORMING meetings
Abstract The present invention provides an infrared-transmitting glass which is a chalcogenide glass, the infrared-transmitting glass having a reduced Ge content, being capable of sufficiently covering the atmospheric window, containing no highly toxic elements such as Se and As, and being suitable for mold forming. Specifically, the present invention provides an infrared-transmitting glass suitable for mold forming, characterized by comprising, in terms of molar concentration, 0-2% Ge, 3-30% Ga, 10-40% Sb, 45-70% S, 3-30% at least one element selected from the group consisting of Sn, Ag, Cu, Te, and Cs, and 0-30% at least one element selected from the group consisting of Cl, Br, and I.
Outline of related art and contending technology BACKGROUND ART
Security, in the field of safety, security, the authentication device such as an infrared ray camera, an infrared sensor or the like is used. These sensors are being used and an infrared, an infrared sensor used in the infrared light transmitted through the optical element is made of a transparent material configured. More specifically, 'atmospheric window' 3-5μm wavelength referred to as permeable to infrared radiation and infrared radiation transmittance 8-12μm material is required which.
In recent years, security, safety or the like increasing awareness, social demand or the like, these devices-performance, high versatility and small in size and has been able to be obtained. Therefore, sensor of a device used in these needs to be miniaturized and, the optical elements also high performance, small size, high productivity manufacturing step is demanded.
As the infrared transmissive material, for example, germanium or zinc selenide (ZnSe) (Ge) is. However, these infrared transmissive material is crystalline and therefore, not limited to the means for polishing molded. Therefore, these materials are used and the non-spherical lens, an optical element such as the complex shape of the lens array to mass produce and cost is also difficult in step a. Also, in particular germanium material itself is expensive, can be used for a sensor having a high versatility is not easy.
On the other hand, as crystal not infrared transmissive material, S, Se, Te, and the like as a primary component As chalcogenide glass, which is advantageous for mass production of optical element mold suitable for molding glass or those having a high glass-forming ability have been proposed various (non-patent document 1 and the like). However, as disclosed in the non-patent document 1 is Se are chalcogenide glass, such as As contains more elements having high toxicity, in terms of safety concern.
In addition, the patent document 1, for the wavelength of the infrared energy of a low-dispersion glass for forming the pre-selected amount III of the periodic table, V, VI Group VII 2 and one or more materials selected from an infrared-ray-transmissive glass is disclosed. However, in the embodiment of Patent Document 1 to concerns safety glass including Se and only a specific disclosure, further S Group VI of the concrete composition containing glass not whatsoever.
In order to improve the above-described concerns, is Patent Document 2, ' molar concentration, Ge: 2-22%, Bi Sb and at least one selected from the group consisting 1:6-34%, Sn: 1-20%, S, Se and Te 1 at least one selected from the group consisting: 58-70% containing, the mold which is infrared-transmissive glass. ' Is disclosed. Patent Document 2 Ge-Sb-Sn-S-based glass of Se, of a highly toxic elements such as As without mold suitable for molding the infrared transparent glass is provided (claim 1, such as the effect of the invention).
However, Patent Document 2 glass having a long wavelength side of the infrared transmission of infrared transmission threshold wavelength of about 11 μm, can be wide enough to cover the window of the air is not still there is room for improvement.
In addition, the prior art documents related to the present invention but a non-patent reference 2-4, these patent Ga-Sb-S system 3 merely discloses a component glass, and other ingredients added as one or more glass components 4 and there is no description concerning the effect or not.
Scope of claims (In Japanese)[請求項1]
モル濃度で、
Ge:0~2%、
Ga:3~30%、
Sb:10~40%、
S:45~70%、
Sn、Ag、Cu、Te及びCsからなる群から選択される少なくとも1種:3~30%、
Cl、Br及びIからなる群から選択される少なくとも1種:0~30%、
を含有することを特徴とするモールド成形に適した赤外線透過ガラス。
[請求項2]
Cl、Br及びIからなる群から選択される少なくとも1種のハロゲン元素とCsとを含有し、当該ハロゲン元素のモル濃度が3~20%である、請求項1に記載の赤外線透過ガラス。
[請求項3]
ClとBrとの合計モル濃度は、AgとCuとCsとの合計モル濃度以下である、請求項1又は2に記載の赤外線透過ガラス。
[請求項4]
Se及びAsを含有しない、請求項1~3のいずれかに記載の赤外線透過ガラス。
[請求項5]
波長が3~13μmの赤外線を透過する、請求項1~4のいずれかに記載の赤外線透過ガラス。
[請求項6]
更に可視域の一部を透過する、請求項2~5のいずれかに記載の赤外線透過ガラス。
[請求項7]
結晶化温度(Tc)とガラス転移温度(Tg)との差(△T)が230K以上である、請求項1~6のいずれかに記載の赤外線透過ガラス。
[請求項8]
600℃まで加熱した場合において結晶化が認められない、請求項1~6のいずれかに記載の赤外線透過ガラス。
[請求項9]
モールド成型により球面レンズ、非球面レンズ、レンズアレイ、マイクロレンズアレイ又は回折格子を作製するための、請求項1~8のいずれかに記載の赤外線透過ガラス。
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • NATIONAL UNIVERSITY CORPORATION KYOTO INSTITUTE OF TECHNOLOGY
  • Inventor
  • KADONO, Kohei
  • OKADA, Arifumi
  • WAKASUGI, Takashi
  • ASHIDA, Tomoyo
IPC(International Patent Classification)
Specified countries National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JP KE KG KN KP KR KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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