Abstract

Measurements of the spatial angular variability of an internally illuminated integrating sphere have been made in the interest of using such a sphere to calibrate instruments with large angular fields of view. Spatial uniformity across a 29.8-cm aperture was found to be 1.9% or better for full twelve-lamp illumination and 2.6% for one-lamp illumination. Angular uniformity from normal to ±40° was found to be 3% or better.

© 1983 Optical Society of America

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References

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  1. W. E. Sumpner, Proc. Phys. Soc. 12, 10 (1892).
    [CrossRef]
  2. J. W. T. Walsh, Photometry (Constable, London, 1958), p. 258.
  3. A. C. Hardy, O. W. Pineo, J. Opt. Soc. Am. 21, 502 (1931).
    [CrossRef]
  4. A. W. McCulloch, J. T. McLean, E. I. Mohr, NASA X-622-69-195 (1969).

1931

1892

W. E. Sumpner, Proc. Phys. Soc. 12, 10 (1892).
[CrossRef]

Hardy, A. C.

McCulloch, A. W.

A. W. McCulloch, J. T. McLean, E. I. Mohr, NASA X-622-69-195 (1969).

McLean, J. T.

A. W. McCulloch, J. T. McLean, E. I. Mohr, NASA X-622-69-195 (1969).

Mohr, E. I.

A. W. McCulloch, J. T. McLean, E. I. Mohr, NASA X-622-69-195 (1969).

Pineo, O. W.

Sumpner, W. E.

W. E. Sumpner, Proc. Phys. Soc. 12, 10 (1892).
[CrossRef]

Walsh, J. W. T.

J. W. T. Walsh, Photometry (Constable, London, 1958), p. 258.

J. Opt. Soc. Am.

Proc. Phys. Soc.

W. E. Sumpner, Proc. Phys. Soc. 12, 10 (1892).
[CrossRef]

Other

J. W. T. Walsh, Photometry (Constable, London, 1958), p. 258.

A. W. McCulloch, J. T. McLean, E. I. Mohr, NASA X-622-69-195 (1969).

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Figures (5)

Fig. 1
Fig. 1

Integrating sphere calibration scheme.

Fig. 2
Fig. 2

Spectral radiant emittance of 180-cm (6-ft) spherical integrator and of one standard lamp QM-95.

Fig. 3
Fig. 3

Relative response (at 900 nm) normal to exit aperture plane using 1° FOV filter wedge spectrometer/radiometer (twelve lamps).

Fig. 4
Fig. 4

Relative response (at 525 nm) normal to exit aperture plane using 1° FOV filter wedge spectrometer/radiometer (one lamp).

Fig. 5
Fig. 5

Viewing angles through center of exit aperture using 1° FOV filter wedge spectrometer/radiometer.

Tables (2)

Tables Icon

Table I Near-Normal Spectral Radiance of NOAA 90-cm (3-ft) Diam Integrating Sphere Source

Tables Icon

Table II Relative Intensity Levels of NOAA 90-cm Integrating Sphere Source

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