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首页> 美国政府科技报告 >IODC98 optical design problem: method of progressing from an ahromatic to an211 apochromatic design
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IODC98 optical design problem: method of progressing from an ahromatic to an211 apochromatic design

机译：IODC98光学设计问题：从aromatic到an211复消色差设计的进展方法

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A general method of designing an apochromatic lens by using a triplet of special211u001eglasses, in which the buried surfaces concept is used, can be outlined. First, 211u001eone initially chooses a starting point which is already achromatic. Second, a 211u001ethick plate or shell is added to the design, where the plate or shell has an 211u001eindex of refraction 1.62, which is similar to the special glass triplet average 211u001eindex of refraction (for example: PSK53A, KZFS1 and TIF6). Third, the lens is 211u001ethen reoptimized to an achromatic design. Fourth, the single element is replaced 211u001eby the special glass triplet. Fifth, only the internal surfaces of the triplet 211u001eare varied to correct all three wavelengths. Although this step will produce 211u001elittle improvement, it does serve to stabilize further optimization. Sixth and 211u001efinally, all potential variables are used to fully optimize the apochromatic 211u001elens. Microscope objectives, for example, could be designed using this technique. 211u001eThe important concept to apply is the use of multiple buried surfaces in which 211u001eeach interface involves a special glass, after an achromatic design has been 211u001eachieved. This extension relieves the restriction that all special glasses have a 211u001ecommon index of refraction and allows a wider variety of special glasses to be 211u001eused. However, it is still desirable to use glasses which form a large triangle 211u001eon the P versus V diagram.

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