Abstract:
A programmable substance detector includes a light source, a sample cell, a programmable diffraction grating positioned to receive light from the light source and to direct diffracted light to the sample cell, and a detector associated with the cell to detect a match between a characteristic of the diffracted light and a corresponding characteristic of a substance within the cell.
Abstract:
The invention concerns a method of and apparatus for measuring particles in a fluid medium in which the particles are moved relative to a structured light field preferably produced by a multi-facet laser light source. Light scattered by the particles is detected to generate an output signal which is analysed to give an indication either of particle size or particle velocity.
Abstract:
PROBLEM TO BE SOLVED: To provide, for use in PCR (polymerase chain reaction) equipment, a new optical instrument for quantitative monitoring of DNA replication which is improved in a dynamic range, capable of automatically selecting the exposure time for expanding a dynamic range, capable of automatic drift adjustment, easy to operate, relatively low price, and easy to change the optical system for storing a different fluorescence dye. SOLUTION: The instrument comprises a plurality of spaced-apart reaction ingredient containers, a light source 11 adapted to direct an excitation beam toward the plurality of containers, a Fresnel lens 2b disposed along an excitation beam path between the light source and the plurality of containers, and a detector disposed along an emission beam path and arranged to receive emission beams emitted from the Fresnel lens which is also disposed along the emission beam path between the plurality of containers and the detector. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
Systems, methods, and techniques for optofluidic analyte detection and analysis using multi-mode interference (MMI) waveguides are disclosed herein. In some embodiments, spatially and spectrally multiplexed optical detection of particles is implemented on an optofluidic platform comprising multiple analyte channels intersecting a single MMI waveguide. In some embodiments, multi-stage photonic structures including a first stage MMI waveguide for demultiplexing optical signals by spatially separating different wavelengths of light from one another may be implemented. In some embodiments, a second stage may use single-mode waveguides and/or MMI waveguides to create multi-spot patterns using the demultiplexed, spatially separated light output from the first stage. In some embodiments, liquid-core MMI (LC-MMI) waveguides that are tunable by replacing a liquid core, heating/cooling the liquid core, and/or deforming the LC-MMI to change its width may be implemented in one or more of the analyte detection/analysis systems disclosed herein.