An imaging arrangement for, and method of, imaging a target at one of a plurality of focal planes, includes a two-dimensional sensor having an array of pixels for converting incident light into electrical signals to be processed into an image of the target, and an optical assembly including a stationary...http://www.google.com/patents/US6909080?utm_source=gb-gplus-sharePatent US6909080 - Arrangement for and method of imaging targets at plural focal planes
