ABSTRACT
Low-coherence interferometric systems provide three-dimensional imaging through scattering media by measurement of the object's temporal response. An optical correlator is presented that allows direct recording of the signal issued from the object under reflection. The filtering technique enhances the image visibility and allows one to obtain an image with a good signal-to-noise ratio. The performance of two particular imaging systems, point-to-point and vertical-slice imaging, is discussed with an object comprising two cover plates that are attached.
Subject(s)
Algorithms , Image Enhancement/instrumentation , Image Interpretation, Computer-Assisted/instrumentation , Imaging, Three-Dimensional/instrumentation , Microscopy, Interference/instrumentation , Nephelometry and Turbidimetry/instrumentation , Signal Processing, Computer-Assisted , Spectrum Analysis/instrumentation , Equipment Design , Equipment Failure Analysis , Image Enhancement/methods , Image Interpretation, Computer-Assisted/methods , Imaging, Three-Dimensional/methods , Light , Microscopy, Interference/methods , Nephelometry and Turbidimetry/methods , Reproducibility of Results , Scattering, Radiation , Sensitivity and Specificity , Spectrum Analysis/methodsABSTRACT
An optical correlation setup is used to image transparent objects through scattering media, and 10-mum longitudinal and 2.5-mum transverse resolution are achieved. Spectral-bandwidth sampling of the light source is made possible by a tunable dye laser and leads to signal enhancement as a result of sampling interferogram filtering. An optical system allows observation of sample slices without the need for a translation stage.
