Friday, November 22, 2013
Wide-field Fluorescent and Darkfield Imaging on a cell-phone
UCLA researchers have developed a matchbox-sized attachment that converts a cell phone's camera into a fluorescent microscope. The device utilizes an inexpensive lens and battery-powered, light-emitting diodes to create a field of view some two orders of magnitude larger than previous cell-phone fluorescent microscopy technology.
It is more than five times smaller than previous cell phone microscopes.
By using side-illumination geometry, the device is also capable of dark-field microscopy on both fluorescent and non-fluorescent specimens, an illumination technique in which only light shown on a biological sample is captured, making it appear as if the sample is on a black background and enhancing the image. The side-illumination technique negates the need for more expensive thin-film interference filters typically used in fluorescent microscopy; an inexpensive plastic color filter can be used for this purpose.
Full publication here, with possible applications in Skin Imaging