Wedge prism is commonly used in laser system for eliminating the reflections from the second surface or for beam steering.circle wedge,square wedge,irregular wedge...Every materials,sizes,wedges and coatings may be available by custom orders. Standard and broadband antireflection coatings are available upon request. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â optical wedges Specification of our wedge prism as follow: Wedge Prism,Fused Silica Wedge Prism,Jgs1 Wedge Prisms,N-Bk7 Wedge Prism China Star Optics Technology Co.,Ltd. , https://www.csoptlens.com
*Material:Â HK9L Grade A optical glass,Fused Silica JGS1,JGS2,JGS3, or other optical glass materials.
*Dimension Tolerance:+/-0.20mm to +0.01/-0.01mmÂ
*Thickness Tolerance:+/-0.20mm to +/-0.005mmÂ
*Surface Quality:80-50 to 10-5 Scratch/Dig
*Surface Flatness: at 632.8nm lambda to lambda /20 per 25mmÂ
*Clear Aperture:80% -- 100%Â
*Angle Tolerance:3-5 minutes to 3 second Â
*Chamfer:0.3+/-0.20mm *45degree
*No ChamferÂ
*Coating OptionalÂ
Will China stop calling "double-reverse" on imported polysilicon?
As the Lunar New Year approached in February 2013, anticipation was high. For the Chinese photovoltaic (PV) industry, which had hit rock bottom, this period brought a different kind of hope. The Ministry of Commerce was expected to announce preliminary results of its "double anti-dumping" investigation into polysilicon imports from the U.S., South Korea, and the EU on February 20. The proposed tax rate could range between 20% and 50%. However, some overseas analysts don’t believe the final outcome will be that harsh.
A report from the Maxim Group suggests that China might not impose heavy tariffs on imported polysilicon. The reasoning is that such a move could hurt domestic PV module manufacturers more than it helps local polysilicon producers. This perspective highlights the complex interplay within the global solar supply chain.
Trade wars rarely have clear winners, especially in an industry as globally integrated as photovoltaics. Whether it's the U.S., Europe, or China, every trade restriction comes with significant consequences. The "double anti-dumping" measures in the U.S. have already been implemented, and the EU is following suit. From their point of view, these actions may seem like a cost-effective economic strategy. Before we rush to support China’s potential countermeasures, it's important to carefully examine the concerns raised by foreign observers and assess the pros and cons of the "double anti-dumping" policy. As Sun Tzu said, “The way of war is vital to the state; it is the basis of life or death, survival or destruction.†In the invisible battle of trade, the stakes are just as high.
A 20%-50% tariff on imported polysilicon seems reasonable. In 2011, China imported 64,600 tons of polysilicon, a 36% increase from the previous year, with total import value exceeding $2 billion. By January-November 2012, China had already imported 76,000 tons from Germany, the U.S., and South Korea—accounting for 88.6% of all imports—worth nearly $2 billion. Industry sources expect that 2012 will break the 80,000-ton mark, setting a new record.
The "double anti-dumping" complaints were filed by several major Chinese companies, including Jiangsu Zhongneng Silicon Industry, Jiangxi Saiwei LDK, Luoyang Zhongwa High-Tech, and Chongqing Daxin Energy. These firms anticipate that the final ruling may impose punitive tariffs of 40%-50% on the targeted polysilicon producers.
Compared to the U.S., where punitive tariffs on Chinese PV modules can reach up to 249.96%, a 40%-50% rate on imported polysilicon would be considered reasonable. Based on current spot prices of around $16–$16.50 per kg, a 20%-24% tariff could push the price up to $20–$24 per kg. For domestic manufacturers, this could reduce profit margins by about 25%. If the final rate is lower, say 20%-30%, they could still maintain profitability without suffering losses.
Meanwhile, overseas long-term orders present a unique opportunity. Many Chinese PV module manufacturers are burdened by outdated contracts with overseas suppliers at high prices. With the "double anti-dumping" measures, these companies could invoke the "force majeure" clause to cancel their contracts, effectively removing a costly obligation.
China may not need to rely heavily on imported polysilicon. Domestic production capacity is sufficient to meet demand, even if imports are restricted. With the right market conditions, local producers could ramp up output to meet demand at competitive prices. Moreover, domestic companies are likely to keep prices stable to avoid harming downstream industries.
In conclusion, while trade tensions remain high, the situation is far from black and white. A balanced approach, considering both short-term impacts and long-term sustainability, is essential for the future of the Chinese PV industry.
Wedge prism is an optical element having plane-inclined surfaces, usually the faces are inclined toward one another at very small angles. Wedges divert light toward their thicker portions.