Patent ID: 8755122

Claim:
A laser light pulse stretching unit comprising: a first pair of reflective optical surfaces including a first reflective surface and a second reflective surface that share a common focus; a second pair of reflective optical surfaces including a third reflective surface and a fourth reflective surface that share the common focus; the first pair of reflective optical surfaces are nested within the second pair of reflective optical surfaces whereby the first reflective surface and the second reflective surface are disposed between the third reflective surface and the fourth reflective surface; the first pair of reflective optical surfaces create a first delayed path; the second pair of reflective optical surfaces create a second delayed path wherein the first pair of reflective optical surfaces are configured to allow the second delayed path to pass there through; a first beam splitter disposed between the first reflective surface and the second reflective surface and between the third reflective surface and the fourth reflective surface; and a second beam splitter disposed between the first reflective surface and the second reflective surface and between the third reflective surface and the fourth reflective surface.