Transmitting light with lateral variation
First Claim
1. Apparatus comprising:
- a transmission structure with entry and exit surfaces, the transmission structure being a layered structure with a laterally varying energy transmission function;
in response to light received at the entry surface that has distributions across a range of photon energies, the transmission structure providing output photons at positions of the exit surface;
a photosensing component that photosenses quantities of photons provided at positions of the exit surface; and
circuitry that responds to the photosensed quantities by providing at least one differential quantity that compares photosensed quantities from the same one of the distributions.
7 Assignments
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Accused Products
Abstract
Input light, such as from an optical sensor or stimulus-wavelength converter, includes one or more light or dark sub-bands. The input light is transmitted, such as through a transmissive layer or transmission component, to obtain effects due to transmission with lateral variation. A detector can, for example, obtain spectral information or other photon energy information about the sub-bands due to lateral variation. For each light or dark sub-band, a transmission component can, for example, provide a respective light or dark spot, and spot position can be used to obtain spectral information such as absolute wavelength or wavelength change. A photosensing component can sense or detect transmitted light or output photons, such as with a photosensor array or a position-sensitive detector. Circuitry can use photosensed quantities to obtain, e.g. a differential signal or information about time of wavelength change.
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Citations
4 Claims
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1. Apparatus comprising:
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a transmission structure with entry and exit surfaces, the transmission structure being a layered structure with a laterally varying energy transmission function;
in response to light received at the entry surface that has distributions across a range of photon energies, the transmission structure providing output photons at positions of the exit surface;a photosensing component that photosenses quantities of photons provided at positions of the exit surface; and circuitry that responds to the photosensed quantities by providing at least one differential quantity that compares photosensed quantities from the same one of the distributions. - View Dependent Claims (2, 3, 4)
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Specification