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Gain stabilization of phototubes using a LED diode scheme

✍ Scribed by L. Holm; H.W. Fielding; G.C. Neilson


Book ID
107921202
Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
291 KB
Volume
234
Category
Article
ISSN
0168-9002

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Measurement of visual index in tunnels u
✍ Jongtaek Park; Donghyun Seo; Bonjeong Koo; Youngil Park πŸ“‚ Article πŸ“… 2004 πŸ› Elsevier Science 🌐 English βš– 290 KB

A visual index measurement scheme that can be applied to a tunnel environment is proposed. To check the ventilation condition, a relative visibility is measured using a laser diode (LD) with wavelength of 880 nm. The LD is modulated with a 10 kHz sinusoidal signal to be used for a homodyne detection