Hey everybody.. this is going to be the last post with my notes on Frontiers in Optics 2011.
Sergio Carbajo and Ying Geng won the Hilbert Grant award in
optical engineering, lens design and illumination. Pic courtesy OSA.
Sergio Carbajo, from Colorado State University, who won the Hilbert Grant (in pic above) showed some amazing movies taken for nanoscale moving objects at near wavelength resolution. They have built an EUV tabletop laser and use repetitive nanosecond pulses from the laser with a zone plate objective to image the nanoscale moving object.
Ying Geng from Rochester, who also won the Hilbert Grant (in pic above), showed clear and sharp images of the mouse retina obtained using an adaptive optics scanning laser ophthalmoscope. The mouse imaging is very important for disease detection, diagnosis and cure because it is easier to find transgenic and knockout models of various eye-diseases in mice. But mice have notoriously poor vision. One would assume this should make for terrible images. But Ying managed to modify the beacon used for wavefront sensing to adapt to the unusually thick retina of the mouse (compared to humans). The beacon is now an annular shape instead of the conventional full uniform beam at the pupil and gives a tight sharp wavefront sensing spot allowing her to do adaptive optics sensing and correction. She showed images of the photoreceptor mosaic, blood capillaries, nerve fiber bundles. She also showed fluorescence labeled ganglion cells and even some results of classifying the ganglion cells into bi-stratified and mono-stratified classes which have dendrites (like roots) in two layers or one layer respectively. Very cool!
In the animal optics session..