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Multilens

# Multilens - Multiple-Lens Systems In most situations one...

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Multiple-Lens Systems In most situations, one lens is not enough to build a useful optical device. Because of this, it is necessary to be able to make predictions about the final image location when rays of light go through two or more thin lenses. The solution for this is simple; the image from the first lens becomes the “object” for the second lens. Literally, the second lens is operating on the output from the first lens as if it were a tangible object. Naturally, the two lenses will have some distance between them. This will be labeled d . The thin lens equation is used to find the image distance from the first lens. This result is then converted to the object distance for the second lens using l = d – l . Last, the thin lens equation is used again, and the image distance from the second lens is the final image location for the system (measured relative to the second lens). Consider the two-lens system shown at right. The object is 4m in front of a converging lens
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