Variable length herriott-type multipass cell

摘要

A Herriott cell is typically formed with two mirrors reflecting tens of times an incident laser beam before letting it out of the cell.
This patent presents an Herriott cell where the optical path can be varied at will, within a range of possible configurations. Thanks to its particular functional scheme, the path can range from a few meters to some tens of meters allowing a single cell to be configured as needed, performing like several Herriott cells.