Physics – Optics
Scientific paper
May 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apopt..14.1182t&link_type=abstract
Applied Optics, vol. 14, May 1975, p. 1182-1189.
Physics
Optics
62
Astronomical Spectroscopy, Digital Systems, Focusing, Image Intensifiers, Image Tubes, Optical Scanners, Field Effect Transistors, High Resolution, Metal Oxide Semiconductors, Photodiodes, Shift Registers
Scientific paper
We have successfully fabricated, tested, and operated a digital image tube consisting of a magnetically focused image intensifier tube in which a self-scanned linear array of 1024 silicon photodiodes operating in the EBS mode serves as the photoelectron image detector, amplifier, and intermediate image storage device. Integral on-chip MOS shift registers driven by an external clock sequentially interrogate the photodiodes through MOS FET multiplex switch arrays. Each output frame is a sequence of 256 analog pulses on each of four video lines. Laboratory and observing tests show that the output signal is photoelectron shot noise limited over at least a range of 1-100,000 detected photoelectrons per picture element, indicating that single photon detection is achieved. High-resolution astronomical spectroscopy has been carried out in the coude spectrograph of the 2.7-m telescope at McDonald Observatory. Examples are shown.
Choisser John P.
Snow E. H.
Tull Robert G.
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