Patent ID: 11892618
Assignee: CARL ZEISS MICROSCOPY GMBH
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. The optical arrangement as claimed in claim 1, wherein
a phase retardation by which a phase of incident light is influenced is settable individually for each liquid crystal element or each mirror;
the optical arrangement further comprising a control unit for setting a light intensity to be output, the control unit being configured to set a phase difference between a phase retardation that is generated by a liquid crystal element or a mirror of the first liquid crystal region or lifting micromirror region and a phase retardation that is generated by a corresponding liquid crystal element or a corresponding mirror of the second liquid crystal region or lifting micromirror region, wherein:
for a maximum light intensity, the phase difference is set to half a light wavelength, or an integer multiple of the light wavelength plus half a light wavelength, as a result of which the outgoing light beam has a polarization direction that is rotated through 90° compared to the incoming light and is therefore not directed at the input-/output-coupling polarization beam splitter in the direction from which the incoming light has come,
for a minimum light intensity, the phase difference is set to 0 or an integer multiple of the light wavelength, with the result that the outgoing light beam has the same polarization direction as the incoming light and is thus directed at the input-/output-coupling polarization beam splitter in the direction from which the incoming light has come.