Since they were described in Refs. [1, 2], multipass matrix systems have found extensive application in various areas of science and engineering. They provide the longest optical path lengths within a small volume with linear control of the number of beam passages. In the present paper a modified three-objective multipass matrix system is considered. The system is used equally successfully both in high-resolution spectroscopy and in metrology as well-controlled delay lines of pulse optical signals. New potential applications offered by the system that favorably distinguish it from its known analogs are also discussed.
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