Our Dome Lens is an optical window composed of two parallel curved surfaces. Dome lenses are commonly used in meteorology applications, pyranometers, defence applications and often used in high pressure viewports in underwater cameras and submersibles.For this reason our dome offer both high transmission as well as durability. Other application for our dome include visible-range domes for pyranometers and infrared-range domes for pyrgeometers, and as high pressure viewports in underwater cameras and submersibles.
BK7 or K9L domes are used primarily in meteorology applications. BK7 offers excellent transmission from 300nm up to 2µm. BK7 is a relatively hard material, with excellent chemical durability.
Specifiation of our dome lens as follow: 300Mm Diameter Dome Lens,300 Mm Diameter Hemisphere Dome Lens,Glass Dome Lens For Camera,Dome Lens For Subsea Shooting China Star Optics Technology Co.,Ltd. , https://www.realpoooptics.com
UV fused silica domes ( JGS1 ): For applications operating in the deeper UV range, we offers a range of UV fused silica domes. Fused silica domes are commonly used in underwater applications at extremely high pressures.
Sapphire domes: For infrared applications we can provide sapphire domes. Sapphire is an extremely hard material with transmission of over 80% in the 2-5µm wavelength range. As with fused silica, sapphire is able to withstand extreme pressures, making it the perfect material for underwater camera and missile fairing applications.
Material:Optical glass N-BK7 , H-K9L, UV Fused Silica, Sapphire, and infrared crystal materials.
Diameter:20-350mm
Diameter Tolerance:+/-0.1mm
Thickness:>2mm
Thickness Tolerance±0.2~0.1mm
Center Deviation:3-5'
Surface quality:80/50 60/40
Coating: Antireflection Coating inside
Chamfers:0.2 x 45° typical
In view of the market in the first half of the year, China's iron ore has once again dominated the world's iron ore demand, but the growth rate has slowed down noticeably. Faced with the growing domestic inflationary pressures, tightening monetary policy, and the regulation of real estate, the demand for iron ore in the second half of the year is expected to continue to slow down, and may even appear stagflation. It is understood that from January to May this year, China's pig iron output was 266.96 million tons, equivalent to iron ore demand of 427.13 million tons, an increase of 5.4% over the same period in 2010. Experts estimate that the national iron ore demand will exceed 1 billion tons this year. Compared with the annual growth rate of 8.5% in 2010 and the increase of 15.5% in 2009, the growth rate in this year's January-May has a significant slowdown. As far as the world is concerned, the EU’s demand for iron ore increased by only 0.35% in the January-May period under the influence of the sovereign debt crisis and inflation; the CIS 6 countries only increased by 0.58% year-on-year; Japan’s earthquakes and economic downturn, iron Ore demand fell by 0.9%. On the whole, China is the main force for the growth of iron ore demand in the world in 2011. From January to May, the global demand for new iron ore is 31.5 million tons, of which 21.9 million tons are from China, accounting for 69.5%. In 2010, world iron ore demand increased by 210 million tons, and China increased by 74 million tons, accounting for only 35%. It is understood that due to the strong rebound in global demand in 2010, major international mining companies have increased production, and the monopoly status of the three major mining companies has been challenged. In the first half of this year, the number of imported iron ore in China increased from the downturn, and the import structure continued to change. Due to the weakening of EU iron ore demand, a large number of Brazilian iron ore returned to the Chinese market. At the same time, China's imported iron ore is also diversified.