flint glass

　

WordNet

1. scan (game in the forest) with binoculars
2. the quantity a glass will hold (同)glassful
3. a brittle transparent solid with irregular atomic structure
4. put in a glass container
5. a container for holding liquids while drinking (同)drinking glass
6. glassware collectively; "She collected old glass"
7. enclose with glass; "glass in a porch" (同)glass in
8. furnish with glass; "glass the windows" (同)glaze
9. a river in western Georgia that flows generally south to join the Chattahoochee River at the Florida border where they form the Apalachicola River (同)Flint River
10. a city in southeast central Michigan near Detroit; automobile manufacturing
11. a hard kind of stone; a form of silica more opaque than chalcedony

PrepTutorEJDIC

1. (光学機械用)フリントガラス,鉛ガラス
2. 〈U〉『ガラス』 / 〈C〉(ガラス製の)『コップ』,グラス / 〈C〉(…の)『コップ(グラス)1杯[の量]』(glassful)《+『of』+『名』》 / 〈U〉《集合的に》『ガラス製品』,ガラス器(glassware) / 〈C〉《英話》『鏡』(looking glass) / 〈C〉レンズ;望遠鏡;顕微鏡 / 《複数形で》『眼鏡』(eyeglasses, spectacles) / 〈C〉晴雨計(barometer) / 〈C〉《英》砂時計(sandglass) / …‘に'ガラスをはめる,‘を'ガラスでおおう
3. 火打ち石;ライターの石

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/06/25 22:33:19」(JST)

wiki en

[Wiki en表示]

For other uses, see Flint glass (disambiguation).

An achromatic doublet, which combines crown glass and flint glass.

Flint glass is optical glass that has relatively high refractive index and low Abbe number (high dispersion). Flint glasses are arbitrarily defined as having an Abbe number of 50 to 55 or less. The currently known flint glasses have refractive indices ranging between 1.45 and 2.00. A concave lens of flint glass is commonly combined with a convex lens of crown glass to produce an achromatic doublet lens because of their compensating optical properties, which reduces chromatic aberration (colour defects).

With respect to glass, the term flint derives from the flint nodules found in the chalk deposits of southeast England that were used as a source of high purity silica by George Ravenscroft, circa 1662, to produce a potash lead glass that was the precursor to English lead crystal.

Traditionally, flint glasses were lead glasses containing around 4–60% lead(II) oxide; however, the manufacture and disposal of these glasses were sources of pollution. In many modern flint glasses, lead oxides are replaced with other metal oxides such as titanium dioxide and zirconium dioxide without significantly altering the optical properties of the glass.

See also

• Crown glass (optics)
• Chromatic aberration
• Cup plate

References

• Kurkjian, Charles R. and Prindle, William R. (1998). Perspectives on the History of Glass Composition. Journal of the American Ceramic Society, 81 (4), 795-813.

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Japanese Journal

• 光ファイバ電流センサの電力設備への応用

• 計測と制御 = Journal of the Society of Instrument and Control Engineers 51(3), 247-252, 2012-03-10
• NAID 10030596494

• 光ファイバ電流センサの温度特性改善手法

• 電気学会論文誌. B, 電力・エネルギー部門誌 = The transactions of the Institute of Electrical Engineers of Japan. B, A publication of Power and Energy Society 130(4), 414-420, 2010-04-01
• NAID 10026226824

• 一般廃棄物溶融スラグの有害物質評価とその対策

• 廃棄物学会研究発表会講演論文集 18(0), 206-206, 2007
• NAID 130004640275

Related Links

• Flint glassとは - goo Wikipedia (ウィキペディア)

Flint glass is optical glass that has relatively high refractive index and low Abbe number. Flint glasses are arbitrarily defined as having an Abbe number of 50 to 55 or less. The currently known flint glasses have refractive indices ...

• Flint Glass

In strasbourg for the weekend. First rehearsal with Thibaud/ Collapsar Drones to prepare a special "Deus Irae" live set for forthcoming concerts!! ... Flint Glass & Collapsar - Deus Irae. LP. AVAILABLE. S21 nonagon version - 20 euro

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関

eyeglass、spectacle