摘要:
Some systems described herein include a frequency dependent phase plate for generating multiple phase-contrast images of a sample, each from a different frequency range of light, each phase-contrast image for frequency range of light formed from light diffracted by the sample interfered with undiffracted light that has a frequency-dependent baseline relative phase shift from the phase plate. In some embodiments, the multiple phase-contrast images may be used to generate a quantitative phase image of a sample. The phase-contrast images or the produced quantitative phase image may have sufficient contrast for label-free auto-segmentation of cell bodies and nuclei.
摘要:
Some systems described herein include a frequency dependent phase plate for generating multiple phase-contrast images of a sample, each from a different frequency range of light, each phase-contrast image for frequency range of light formed from light diffracted by the sample interfered with undiffracted light that has a frequency-dependent baseline relative phase shift from the phase plate. In some embodiments, the multiple phase-contrast images may be used to generate a quantitative phase image of a sample. The phase-contrast images or the produced quantitative phase image may have sufficient contrast for label-free auto-segmentation of cell bodies and nuclei.
摘要:
Systems and methods described herein employ multiple phase-contrast images with various relative phase shifts between light diffracted by a sample and light not diffracted by the sample to produce a quantitative phase image. The produced quantitative phase image may have sufficient contrast for label-free auto-segmentation of cell bodies and nuclei.
摘要:
Systems and methods described herein employ multiple phase-contrast images with various relative phase shifts between light diffracted by a sample and light not diffracted by the sample to produce a quantitative phase image. The produced quantitative phase image may have sufficient contrast for label-free auto-segmentation of cell bodies and nuclei.
摘要:
A system, in one embodiment, includes an optical coherence tomography (OCT) imaging system having a light source configured to emit light. The OCT imaging system further includes a beam splitter configured to receive the light from the light source, split the light into a first light portion directed along a sample arm comprising a sample and a second light portion directed along a reference arm comprising a reference mirror, receive a first reflected light portion from the sample arm and a second reflected light portion from the reference arm, combine the first and second reflected light portions to obtain an interference signal. Further, the OCT imaging system includes a controller having logic configured to perform an auto-ranging process to match the reference arm with the sample arm.
摘要:
A system for delivering exogenous molecules comprises a support for containing cells and exogenous molecules; an infra-red (IR) light source that generates an IR optical beam with an average power density at least greater than 105 W/cm2; one or more optical elements; an imaging system to image the cells in a field of view; a processor that generates a signal for localization of cells in the field of view; a light pattern shaper for temporal focusing of optical beam to generate wide field illumination on the cells to permeabilise the cell membrane for delivering the exogenous molecules; and a controller that switches optical beam from wide field illumination to a focused illumination. The processor is operatively coupled to the imaging system and the light pattern shaper and transmits the signal for the localization of cells to ensure the temporal focusing of the optical beam on the cells.
摘要:
Lighting system embodiments are provided to energize and calibrate strings of light-emitting diodes. These embodiments are particularly useful for calibration of strings of light-emitting diodes that are arranged to provide backlighting of liquid crystal displays. The systems are structured around the use of a single comparator that is multiplexed to facilitate calibration of a plurality of current sources. The systems can be adapted for use in displays in which different techniques (e.g., “analog dimming” and “pulse-width modulation”) are used to vary the brightness of the display. The systems remove the need for special structures (e.g., fuse arrays, special test equipment, and interfaces).
摘要:
An optical detection system for sensing one or more samples is provided. The optical detection system comprises a broadband light source that emits a beam comprising a continuous spectrum over a range of wavelengths; a fluidic cell comprising one or more channels that positions the sample so that at least a portion of the beam is directed on the sample to produce a back reflected beam; and a spectrometer that analyzes an interference spectrum of the beam back reflected from the sample.
摘要:
Lighting system embodiments are provided to energize and calibrate strings of light-emitting diodes. These embodiments are particularly useful for calibration of strings of light-emitting diodes that are arranged to provide backlighting of liquid crystal displays. The systems are structured around the use of a single comparator that is multiplexed to facilitate calibration of a plurality of current sources. The systems can be adapted for use in displays in which different techniques (e.g., “analog dimming” and “pulse-width modulation”) are used to vary the brightness of the display. The systems remove the need for special structures (e.g., fuse arrays, special test equipment, and interfaces).
摘要:
Systems, arrangements and methods for a molecular recognition are provided. For example, a particular radiation having wavelength that varies over time and/or a spectral width that is greater than 10 nm can be provided. For example, at least one first electro-magnetic radiation can be provided to at least one sample, and at least one second electro-magnetic radiation may be provided to a reference, with both the first and second electro-magnetic radiations being part of the particular radiation. Further, the interference between a third electro-magnetic radiation (associated with the first electro-magnetic radiation) and a fourth electro-magnetic radiation (associated with the second electro-magnetic radiation) can be detected. A change in a thickness of at least one portion of the sample based on the interference can be determined.