Back to results
US 6,252,712 B1Granted
Optical system with polarization compensator
AssigneeCarl-Zeiss-Stiftung
InventorsGerhard Fürter, Winfried Kaiser, Christian Wagner, Michael Gerhard, Karl-Heinz Schuster
Life of this patent
Estimating the term…
Abstract
An optical system with at least one optical element that causes a disturbance of the distribution of polarization over the cross section of a light beam wherein at least one birefringent optical element is provided, with a thickness which varies irregularly over the cross section, such that the disturbance of the distribution of polarization is at least partially compensated.
Claims14
An optical system comprising
- at least one optical element (2, 11, 12) that causes a disturbance of the distribution of polarization over the cross section of a light beam (10), and
- at least one birefringent free-form optical element having a thickness that varies irregularly over said cross section such that the disturbance of the distribution of polarization is at least partially compensated.
A process for the production of an optical system, comprising
- finish-mounting and adjusting a partial system,
- making polarization optical precision measurements of said partial system,
- corresponding to said polarization optical measurement data, locally differently removing material from at least a first birefringent optical element, and
- inserting said first birefringent optical element into the beam path of said optical system behind said partial system.
1 more element
Dependencies are inferred from the claim text.