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confocal microscopy

^ http://purl.obolibrary.org/obo/MI_0663


A confocal is a standard epifluorescence microscope with improvement essentially coming from the rejection of out-of-focus light interference. Confocal imaging system achieves this by two strategies: a) by illuminating a single point of the specimen at any one time with a focused beam, so that illumination intensity drops off rapidly and b) by the use of blocking a pinhole aperture in a conjugate focal plane to the specimen so that light emitted away from the point in the specimen being illuminated is blocked from reaching the detector. Only the light from the single point illuminated of the specimen passing through the image pinhole is detected by a photodetector. Usually a computer is used to control the sequential scanning of the sample and to assemble the image for display onto a video screen. [ PMID:14755292 ]

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PSI-MI_slim

definition

A confocal is a standard epifluorescence microscope with improvement essentially coming from the rejection of out-of-focus light interference. Confocal imaging system achieves this by two strategies: a) by illuminating a single point of the specimen at any one time with a focused beam, so that illumination intensity drops off rapidly and b) by the use of blocking a pinhole aperture in a conjugate focal plane to the specimen so that light emitted away from the point in the specimen being illuminated is blocked from reaching the detector. Only the light from the single point illuminated of the specimen passing through the image pinhole is detected by a photodetector. Usually a computer is used to control the sequential scanning of the sample and to assemble the image for display onto a video screen.

id

MI:0663

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