Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1990-12-04
1992-06-16
Arnold, Bruce Y.
Optical: systems and elements
Optical modulator
Light wave temporal modulation
359251, 359256, G02B 2728, G02F 103
Patent
active
051228955
ABSTRACT:
An efficiency polarization converter of few optical components for converting a randomly polarized light into a single beam of linearly polarized light, comprises a first optical device receiving the random light and projecting two linearly polarized lights one projected in a first direction, another to a second optical device which changes the polarization plane thereof, the polarization changes light being directed by a third optical device to the first direction, thereby the two linearly polarized light are combined and aligned to have a common polarization to become the single beam linearly polarized light projected in the first direction. Typical first optical device is a polarization beam splitter, a typical second optical device is a quarterwave plate with a mirror, a halfwave plate or a Fresnel rhomb with a mirror, or a photomodulation material interposed between biased electrodes with a mirror, a typical third optical device is a polarization beam splitter, a prism or a mirror. The first and third optical devices may be combined to a 3-prism structure. The polarization converter may be used with liquid crystal light modulators to utilize image display systems.
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"Fresnel Rhomb," McGraw-Hill Dictionary of Scientific and Technical Terms, p. 649.
Maeno Keiichi
Nakagaki Shintaro
Negishi Ichiro
Suzuki Tetsuji
Takahashi Ryusaku
Arnold Bruce Y.
Lerner Martin
Meller Michael N.
Victor Company of Japan Ltd.
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