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- W1986213152 abstract "A field photometer consisting of a single photomultiplier tube and nine-element filter wheel has been designed and used to study low-light levels of the order of 10−11 W cm−2 sr−1. The filter wheel can be operated up to 10 rps to give data from each spectral region at a rate of 10 times per second. Light is collected by a 500 mm diam, f/1.1 parabolic mirror and, after being rendered parallel by a suitable lens system, passes through filters to a photomultiplier. A description and operating characteristics of the instrument are given. Sample data taken on a recent field test are presented, as are photographs of key items in the instrument." @default.
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- W1986213152 date "1964-02-01" @default.
- W1986213152 modified "2023-09-24" @default.
- W1986213152 title "Field Photometer with Nine-Element Filter Wheel" @default.
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- W1986213152 doi "https://doi.org/10.1364/ao.3.000303" @default.
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