The light from the halogen lamps passes through a diffuser and a polarizing film.
This negative is illuminated from the front by an arc lamp, and the light from this lamp passes through the transparent regions of the liquid-crystal layer to the middle layer.
For hours each night, they worked in a shadow laboratory lit by a single lamp, passing bottles of urine through a hand-size hole in the wall, to be ready for testing the next day, he said.
Light from a tungsten lamp passed through a monochromator and was focused onto the sample by a lens.
The receptors were illuminated with 50 ms flashes of light from a Xenon arc lamp passed through a UV cut-off filter, giving a test spectrum of ∼400 700 nm.
For Ca2+ imaging, excitation light (488 nm; 10 nm bandwidth) was provided by a 75-W Xenon lamp passing through a monochromator (Optoscan, Cairn Research) and fluorescence images were collected with a CCD cooled (–30°C) 12-bit CCD camera (CoolSNAP HQ2, Roper Scientific).
Light of greater than 500 nm wavelength can then be visualised in the third imaging channel, including brightfield imaging with illumination from a lamp passing first through a red filter.
Reach into the car with the back of your hand facing forward so that the square white plastic removable socket for the lamp passes between your index and middle fingers.
Laser-induced luminescence spectra from different areas of the objects and traditional digital imaging, using led-based lamps, long pass filters and a commercial photographic camera, complement the results from photoluminescence lifetime imaging.
Subtitles appear white, as they are usually burnt into or drawn on the emulsion to allow light from the projector lamp to pass through them.
