Phase-compensated trihedral reflectors for interferometer systems
Abstract
Abstract A TRIHEDRAL REFLECTOR IS DISCLOSED HAVING MEANS FOR REFLECTING PLANE-POLARIZED LIGHT WITH THE SAME POLARIZATION STATE AS THE INCIDENT LIGHT. SUCH A REFLECTOR IS PARTICULARLY USEFUL IN AN INTERFEROMETER SYSTEM EMPLOYING A LASER LIGHT SOURCE. A TRIHEDRAL REFLECTOR WITH PHASE-COMPENSATING COATINGS ON THE REFLECTIVE SURFACES IN COMBINATION WITH A QUATERWAVE PLATE WHICH CONVERTS INCIDENT PLANE-POLARIZED LIGHT INTO CIRCULARLY-POLARIZED LIGHT AND RECONVERTS REFLECTED CIRCULARLY-POLARIZED LIGHT BACK INTO PLANE-POLARIZED LIGHT, SO THAT THE FINAL POLARIZATION STATE IS IN THE SAME AS THAT OF THE INCIDENT LIGHT. ADDITIONAL THIN FILM COATINGS ARE PROVIDED TO ADVANCE OR RETARD THE LONGITUDINAL PHASE OF LIGHT INCIDENT IN ANY ONE SEXTANT WITH RESPECT TO LIGHT INCIDENT IN ADJACENT SEXTANTS TO COMPENSATE FOR A RELATIVE PHASE RETRADATION OR ADVANCEMENT WHICH IS EFFECTED ACCORIDNG TO THE SEXTANT IN WHICH THE LIGHT IS INCIDENT.
Inventors
- 👤 Paul B Mauer
Bibliographic Details
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