Retroreflector target for laser ranging

Details Retroreflector target for laser ranging Retroreflector target for laser ranging

1995-03-09

1996-12-31

Phan, James

Optical: systems and elements

Signal reflector

3-corner retroreflective

3561523, 342 7, 224167, G02B 5122

Patent

active

055899811

ABSTRACT:
Retroreflective target for laser ranging embodying at least one hollow cube corner retroreflector constituted by three reflective surfaces which are substantially planar and perpendicular to each other and intersect at three edges which are substantially orthogonal and converge at an apex (S), the cube corner retroreflector being associated with a geometrical normal at the same angle to each of the edges, the target including a reference point (O) substantially on the normal on the opposite side to the reflective surfaces at a distance e..sqroot.3 from the apex (S), where e is the distance of this reference point from each of the surfaces, the target being characterized in that it has, facing each reflective surface, a parallel-sided plate (E1, E2, E3) which is transparent to the light to be retroreflected and made from a material having a known refractive index the plates (E1, E2, E3, CV) associated with the retroreflector having the same thickness e' such that, at least approximately: ##EQU1##

REFERENCES:
patent: 4472054 (1984-09-01), Pouit
patent: 5202743 (1993-04-01), Lund et al.
patent: 5207003 (1993-05-01), Yamada et al.
patent: 5474264 (1995-12-01), Lund et al.

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