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The unwanted interference effects are suppressed by vapour-depositing a special dielectric coating known as a phase-compensating coating on the roof surfaces of the roof prism. These phase-correction coating or P-coating on the roof surfaces was developed in 1988 by Adolf Weyrauch at Carl Zeiss [6] Other manufacturers followed soon, and since ...
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Kamala Devi Harris [b] (born October 20, 1964) is an American politician and attorney who is the 49th and current vice president of the United States since 2021, serving with President Joe Biden.
In theory, the process can continue indefinitely: Compound lenses used in cameras typically have six or more simple lenses (e.g. double-Gauss lens); several of those lenses can be made with different types of glass, with slightly altered curvatures, in order to bring more colors into focus.
India's cataract-surgical rate rose from just over 700 operations per million people per year in 1981, to 6,000 per million per year in 2011, thus getting closer to the estimated requirement of 8,000–8,700 operations per million per year needed to eliminate cataract blindness in the country. The rate's rise was partly linked to factors such ...
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