crown glass वाक्य
उदाहरण वाक्य
मोबाइल
- For example, the borosilicate glass Schott "'BK7 "'is an extremely common crown glass, used in precision lenses.
- For example, the higher dispersion flint glasses have " V " < 55 whereas the lower dispersion crown glasses have larger Abbe numbers.
- These lenses are used for UV photography, as the quartz glass has a lower extinction rate than lens made with more common crown glass formulas.
- :Flint glass and crown glass can be replaced by any two materials with different Keenan Pepper 13 : 35, 6 January 2006 ( UTC)
- These tend to be based on the material composition, for example " BK7 " is the Schott Glass classification of a common crown glass.
- As well as the specific material named " crown glass ", there are other optical glasses with similar properties that are also called crown glasses.
- As well as the specific material named " crown glass ", there are other optical glasses with similar properties that are also called crown glasses.
- Glass with weaker dispersive power ( greater v ) is named " crown glass "; that with greater dispersive power, " flint glass ".
- The town had early forges and saw mills, grist mills and tanneries, and in 1812, the Cheshire Crown Glass Company opened, as did a triphammer operation.
- In collaboration ( 1827-1832 ) with optician George Dollond, Barlow built an achromatic lens that utilized liquid carbon disulfide . ( Achromatic lenses were important crown glass.
- In the north transept is a memorial window to Samuel Lucas who died in 1853, designed and installed by the St Helens Crown Glass Company which later became Pilkington.
- A biconcave lens made of flint glass with an index of 1.7 is measured with a lens clock calibrated for crown glass with an index of 1.523.
- The leaded-glass, quarrel-paned casement windows widely used in Virginia House also salvage authentic crown glass dating from the sixteenth to the nineteenth century from the English priory.
- "' Barium oxide "', BaO, is a white hygroscopic non-flammable cubic structure and is used in cathode ray tubes, crown glass, and catalysts.
- Other methods for making hand-blown glass included blown plate glass, crown glass ( introduced to England in the 17th century ), polished plate glass and cylinder blown sheet glass.
- Johann Andreas Schmeller ridiculed the myths of the Erdhenne in his " Bayerisches W�rterbuch ", claiming that reports about it were created by misinterpreting moonlight shining through crown glass windows.
- In 1765 Peter Dollond ( son of John Dollond ) introduced the triple objective, which consisted of a combination of two convex lenses of crown glass with a concave flint lens between them.
- The development of diaper latticed windows was in part because three regular diamond-shaped panes could be conveniently cut from a piece of Crown glass, with minimum waste and with minimum distortion.
- Also producing three-mold glass in New England was the Boston Crown Glass Manufactory, as well as the Quincy Glass Works in Massachusetts, which made snuff bottles molded to a square form.
- At the high performance end of their range, Orion has a series of two element apochromatic ( apo ) refractors manufactured by Synta featuring " extra low crown glass in one element of the objective lens.
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