This article [Opt. Eng. 48(12), 123003 (December 2009)] was originally published on 22 December 2009 with a few minor errors.
1. In the caption to Fig. 1:
a. The word “retroreflected” was misspelled as “retroreected”.
b. , which is a unit vector, was missing the hat symbol (it was incorrectly written as ).
c. Finally, there should be a space between the word “simply” and “ ”.
For clarity, the complete correct caption to Fig. 1 is “Fig. 1 Schematic of a retroreflector (a) without and (b) with gaps between the faces. The angles θ and ϕ denote the direction, , of incidence of the interrogating ray and the v-axis in the optical coordinate system. The direction of the retroreflected ray, , is simply . The three vectors , , and are parallel to each other.”
2. In the caption to Fig. 2, the variable was incorrectly written as .
3. In the caption to Fig. 7, the variable was incorrectly written as .
All versions of the article were corrected on 31 December 2009 and the article appears correctly in print.