Measuring spectral lines from an analyte using multiplexed holograms and polarization manipulation
First Claim
Patent Images
1. An apparatus for routing selected wavelength bands in incoming light comprising:
- an entry for receiving incoming light;
a polarization-sensitive assembly positioned to separate the incoming light by polarization;
one or more holographic assemblies containing multiplexed holograms for selectively reflecting the selected wavelength bands of the polarization-separated light; and
an exit separate from the entry, where the polarization-sensitive assembly is also positioned to direct the reflected light to the exit.
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Abstract
An optical apparatus in which multiplexed holograms are used to achieve wavelength selectivity and polarization manipulation is used to facilitate near-normal incidence of light on the holograms. The polarization manipulation allows light reflected from the holograms to be separated from the light incident on the holograms. In one application, the apparatus can be used to extract spectral lines of an analyte from radiation scattered from a sample.
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Citations
49 Claims
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1. An apparatus for routing selected wavelength bands in incoming light comprising:
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an entry for receiving incoming light; a polarization-sensitive assembly positioned to separate the incoming light by polarization; one or more holographic assemblies containing multiplexed holograms for selectively reflecting the selected wavelength bands of the polarization-separated light; and an exit separate from the entry, where the polarization-sensitive assembly is also positioned to direct the reflected light to the exit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An apparatus for routing selected wavelength bands in incoming light comprising:
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a polarization-sensitive assembly positioned to separate incoming light by polarization; one or more holographic assemblies containing multiplexed holograms for selectively reflecting the selected wavelength bands of the polarization-separated light; and where the polarization-sensitive assembly is also positioned to direct the reflected light in two or more different directions so that incoming light of different polarizations is routed to different directions. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. An apparatus for routing selected wavelength bands in incoming light comprising:
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a first stage comprising; a first entry for receiving incoming light; a first polarization-sensitive assembly positioned to separate the incoming light by polarization; one or more first holographic assemblies containing first multiplexed holograms for selectively reflecting first selected wavelength bands of the polarization-separated light; a first exit, where the first polarization-sensitive assembly is also positioned to direct light reflected from the first holographic assembly(s) to the first exit; and a second stage comprising; a second entry for receiving light transmitted by at least one of the first holographic assembly(s); one or more second holographic assemblies containing second multiplexed holograms for selectively reflecting second selected wavelength bands of the received light, where the second selected wavelength bands are different from the first selected wavelength bands; a second exit; and an active polarization rotator that can be switched between activating and not activating the second stage, where activating the second stage results in routing the received light to the second holographic assembly(s) and then to the second exit. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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Specification