摘要(英) |
High quality optical instruments and elements like optical pickup head, projection optics systems used in IC manufacture and/or MEMS products, and microscope high magnification objectives, etc, all can not tolerate the spherical aberration caused by spherical surfaces lenses.
Aspherical surface lenses are popular used as the solution candidates, though they may be harder to produce than spherical surfaces lenses. In this paper, we find that concentric gradient-indexed lenses may be another choice. We suggest some methods to produce concentric gradient-indexed materials. As the object point is located at the center of these concentric gradient-indexed shells, by our calculation, when we choose suitable refractive index gradient, the image of the lens made by our concentric gradient-indexed material have no primary spherical
aberration. If we let the refractive index variation function a little deviate from linear one, we can even eliminate spherical aberration absolutely.
By the results deduced in our calculation, we can find the Abbe points and we can also find the Abbe points are also the turning points of the ordinary spherical homogeneous lens spherical aberrations tendency. Finally, we give some applications of the concentric gradient-indexed lenses to microscope objectives and others. |
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內容摘要: Rhodocrosite (菱錳礦, MnCO3), 顏色紅至粉紅, 折射
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