Patent ID: 9618742
Date: 2017-04-11
CPC Classifications: G01S,G02B

Claim:
1. An apparatus comprising: a housing comprising a top end, a bottom end, and a longitudinal axis intersecting the top and bottom ends, wherein the top end of the housing and the bottom end of the housing each comprise one or more female coupling parts; and a set of reflective surfaces, wherein each reflective surface is non-rigidly coupled to the top end of the housing and the bottom end of the housing by sizing the reflective surface to be smaller than a vertical distance between the top end and bottom end and including at least one male coupling part that extends vertically from the reflective surface into a corresponding one of the female coupling parts at the top end of the housing and at least one male coupling part that extends vertically from the reflective surface into a corresponding one of the female coupling parts at the bottom end of the housing, such that each reflective surface possesses limited freedom of vertical movement with respect to the housing.