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干涉仪测试待测镜面的边缘散射造成虚假干涉条纹的边缘效应利用一个transfer lens来消除。没太看懂,求大神解惑。这是书上的解释transfer lens的作用第一条。
In order to eliminate the false turned up or down edgephenomena described, a transfer lens is used. This lens, or lensgroup, serves a dual role. It images the surface under test onto the sensor (CCD, film, etc.), thus bringing the scattered light back to the edge of the interferogram where it belongs to eliminate falsefringes. It also matches the size of the image to the sensor. If this isdone properly, the final interferogram will show crisp edges withno artificial edge effects. Figure 15.6 shows how the scattered lightat the edge of the surface under test is reimaged onto theinterferogram plane by the transfer lens.
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