Rc. Daley et Lg. Hassebrook, CHANNEL CAPACITY MODEL OF BINARY ENCODED STRUCTURED LIGHT-STRIPE ILLUMINATION, Applied optics, 37(17), 1998, pp. 3689-3696
A common approach to structured Light-illumination measurement is to e
ncode a surface topology successively with binary light-stripe pattern
s of variable spatial frequency. Each surface location is thereby enco
ded with a binary sequence associated with its height. By analyzing th
e lateral displacements of the reflected encoded pattern, one can reco
nstruct the surface topology without ambiguity. We present a model for
multistripe analysis in terms of an information channel for which the
maximum spatial stripe frequency is related to channel capacity and m
aximized accordingly by use of Shannon's theorems. The objective is to
improve lateral resolution through optimized spatial frequency while
maintaining a fixed range resolution. Given an optimized spatial frequ
ency, a technique is presented to enhance lateral resolution further b
y multiplexing the Light structure. Theoretical and numerical results
are compared with experimental data. (C) 1998 Optical Society of Ameri
ca.