Abstract

Light-emitting diodes can function as spectrally selective detectors in a miniature, inexpensive sun photometer that measures atmospheric turbidity and precipitable water.

© 1992 Optical Society of America

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References

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  1. R. Lynch, The Role of Compositionally Graded GaAlAs Diodes in Optical Communications (IBM Electronics Systems Center, New York, 1972).
  2. F. M. Mims, “How to monitor ultraviolet radiation from the sun,” Sci. Am. 263, 106–109 (1990).
    [CrossRef]
  3. F. Volz, Sun Photometer (Volz, Lexington, Mass., 1990).
  4. N. Foster, L. Foskett, “A spectrophotometer for the determination of the water vapor in a vertical column of the atmosphere,” J. Opt. Soc. Am. 35, 601–610 (1945).
    [CrossRef]
  5. C. Tomasi, R. Guzzi, “High precision atmospheric hygrometry using the solar infrared spectrum,” J. Phys. E 7, 647–649 (1974).
    [CrossRef]
  6. C. Reitan, “Surface dew point and water vapor aloft,” J. Appl. Meteorol. 2, 776–779 (1963).
    [CrossRef]

1990 (1)

F. M. Mims, “How to monitor ultraviolet radiation from the sun,” Sci. Am. 263, 106–109 (1990).
[CrossRef]

1974 (1)

C. Tomasi, R. Guzzi, “High precision atmospheric hygrometry using the solar infrared spectrum,” J. Phys. E 7, 647–649 (1974).
[CrossRef]

1963 (1)

C. Reitan, “Surface dew point and water vapor aloft,” J. Appl. Meteorol. 2, 776–779 (1963).
[CrossRef]

1945 (1)

Foskett, L.

Foster, N.

Guzzi, R.

C. Tomasi, R. Guzzi, “High precision atmospheric hygrometry using the solar infrared spectrum,” J. Phys. E 7, 647–649 (1974).
[CrossRef]

Lynch, R.

R. Lynch, The Role of Compositionally Graded GaAlAs Diodes in Optical Communications (IBM Electronics Systems Center, New York, 1972).

Mims, F. M.

F. M. Mims, “How to monitor ultraviolet radiation from the sun,” Sci. Am. 263, 106–109 (1990).
[CrossRef]

Reitan, C.

C. Reitan, “Surface dew point and water vapor aloft,” J. Appl. Meteorol. 2, 776–779 (1963).
[CrossRef]

Tomasi, C.

C. Tomasi, R. Guzzi, “High precision atmospheric hygrometry using the solar infrared spectrum,” J. Phys. E 7, 647–649 (1974).
[CrossRef]

Volz, F.

F. Volz, Sun Photometer (Volz, Lexington, Mass., 1990).

J. Appl. Meteorol. (1)

C. Reitan, “Surface dew point and water vapor aloft,” J. Appl. Meteorol. 2, 776–779 (1963).
[CrossRef]

J. Opt. Soc. Am. (1)

J. Phys. E (1)

C. Tomasi, R. Guzzi, “High precision atmospheric hygrometry using the solar infrared spectrum,” J. Phys. E 7, 647–649 (1974).
[CrossRef]

Sci. Am. (1)

F. M. Mims, “How to monitor ultraviolet radiation from the sun,” Sci. Am. 263, 106–109 (1990).
[CrossRef]

Other (2)

F. Volz, Sun Photometer (Volz, Lexington, Mass., 1990).

R. Lynch, The Role of Compositionally Graded GaAlAs Diodes in Optical Communications (IBM Electronics Systems Center, New York, 1972).

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Figures (3)

Fig. 1
Fig. 1

Six-element spectrally selective LED detector array.

Fig. 2
Fig. 2

Langley plot for each channel of a LED sun photometer.

Fig. 3
Fig. 3

LED hygrometer calibration curve.

Tables (1)

Tables Icon

Table 1 Peak Wavelength Emission and Bandwidth of LED’s Used as Detectors in a Sun Photometer

Equations (2)

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y = 0.4 + 0.21 exp ( - x / 3.05 ) ,
y = 0.57 + 0.014 ( ln x ) 2 + 0.098 ln x + 0.011 ln x / x .

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