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plano-convex

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plano-convex
A shape of sun-dried brick, flat on one side, convex on the other, typical of early Mesopotamian construction.
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Later research into this effect revealed a surprising result, that is, the high reduction of the chromatic aberration of a single plano-convex objective lens by placing an achromatic doublet lens at some position along the focal length, and inside the prime focus itself.
Discovery of a new refractor system by Wall, John / Journal of the British Astronomical Association
2] Laser Optics feature zinc selenide positive focusing lenses in plano-convex, plano-concave, and meniscus configurations in 0.
Replacement [CO.sub.2] by Tooling & Production
The lens was a plano-convex element that improved the results of the pin hole camera.
Historically speaking by Patti, Tony / PSA Journal
 
 
 
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