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We present <i>femto-photography</i>, a novel imaging technique to capture and visualize the propagation of light. With an effective exposure time of 1.85 picoseconds (ps) per frame, we reconstruct movies of ultrafast events at an equivalent resolution of about one half trillion frames per second. Because cameras with this shutter speed do not exist, we(More)
The molecular basis of lipid packing in human stratum corneum and a model phospholipid system has been studied as a function of temperature using Fourier Transform (FT) Raman spectroscopy. Thermally induced molecular rearrangements of the model lipid system, dipalmitoylphosphatidyl choline (DPPC), and stratum corneum were investigated using FT Raman(More)
How will the world look with a one trillion frame per second camera? Although such a camera does not exist today, we converted high end research equipment to produce conventional movies at 0.5 trillion (5&#183; 10<sup>11</sup>) frames per second, with light moving barely 0.6 mm in each frame. Our camera has the game changing ability to capture objects(More)
BACKGROUND/AIMS Raman spectroscopy has been used for a range of biomedical applications: the study of normal and diseased tissues, and the interaction of chemical agents with tissues, implants and even single cells. The object here was to review the extent to which the Raman spectroscopic technique has been applied to skin research, considering the(More)
We introduce an interactive method to assess cataracts in the human eye by crafting an optical solution that measures the perceptual impact of forward scattering on the foveal region. Current solutions rely on highly-trained clinicians to check the back scattering in the crystallin lens and test their predictions on visual acuity tests. Close-range parallax(More)
We capture ultrafast movies of light in motion and synthesize physically valid visualizations. The effective exposure time for each frame is under two picoseconds (ps). Capturing a 2D video with this time resolution is highly challenging, given the low signal-to-noise ratio (SNR) associated with ultrafast exposures, as well as the absence of 2D cameras that(More)
The retina is a complex light-sensitive tissue that is an essential part of the human visual system. It is unique, as it can be optically observable with non-invasive methods through the eye's transparent elements. This has inspired a long history of retinal imaging devices for examination of optical function [Van Trigt 1852; Yates 2011] and for diagnosis(More)
The FT-Raman spectra of six mammalian ivories, other than elephant and mammoth, are presented and spectral differences formulated into a protocol for the identification of animal species from the ivory samples. In this study, sperm whale, walrus, wart hog, narwhal, hippopotamus and domestic pig are considered. The results, which are obtained(More)
The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Figure 1: What does the world look like at the speed of light? Our new computational photography technique allows us to visualize light in ultra-slow motion, as it travels and interacts with objects in table-top scenes. We capture photons(More)