Spectral light division and recombination configuration as well as process for the spectrally selective modulation of light
AssigneeUnaxis Balzers Aktiengesellschaft
InventorClaus Heine
Life of this patent
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Abstract
A spectral light division and recombination configuration has an incident face for light to be divided, at least one emergent face for recombined light and a spectrally selective division and recombination device. The spectrally selective division and recombination device has a polarization-selective division and recombination configuration whereon light of one spectral range (Δλ3) is separated from light of other spectral ranges (Δλ1, Δλ2) or light of the one spectral range (Δλ3) is recombined with light of the other spectral ranges (Δλ1, Δλ2).
Claims32
Spectral light division and recombination configuration with an incident face for light to be divided, at least one emergent face for recombined light and a spectrally selective division and recombination device, the spectrally selective division and recombination device comprising:
- a polarization-selective division and recombination configuration whereon light of one spectral range (Δλ3) is at least one of separated from and recombined with, light of other spectral ranges (Δλ1, Δλ2);
- the polarization-selective division and recombination configuration being preceded by a spectrally selective polarization rotator and the spectrally selective polarization rotator being preceded by a broad-band polarizer.
A process for spectrally selective modulation of light, comprising:
- providing light of at least three spectral ranges;
- polarizing light of at least one of said ranges by 90° with respect to light of the other ranges;
- modulating said light of said at least one range and of said other ranges by means of respective controlled light valves operating in reflection;
- recombining said modulated light to generate a modulated output beam comprising light of said at least three ranges,
- thereby splitting and recombining said one and said other ranges by polarization-selective beam splitting, and inputting to surfaces of said light valves, light distributed along said surfaces and of said respective ranges, which has, considered along respective surfaces, been optically treated by equal optical operations.
Dependencies are inferred from the claim text.