Patent ID: 7079260

Claim:
An optical profile determining apparatus comprising: an optical detector; an optical source for generating a transmit beam comprising a plurality of wavelengths, and for generating a reference beam comprising the plurality of wavelengths; at least one optical element for directing the transmit beam to a target, for directing a resulting reflected transmit beam back from the target to said optical detector, and for combining the reference beam with the reflected transmit beam so that a profile of the target is based upon fringe contrast produced by the plurality of wavelengths in the reference beam and the plurality of wavelengths in the reflected transmit beam; and a plurality of spaced apart reflectors at the respective predetermined locations on the target for providing the reflected transmit beam; said at least one optical element including a first lens for colliminating the transmit beam, a lenslet array downstream from said first lens for directing the transmit beam toward the target, and a second lens downstream from said lenslet array for projecting the transmit beam onto the target at predetermined locations thereon.