Abstract

The modulation transfer functions of different ground-glass screens produced by grinding or etching can be measured. Since screens of this type destroy the coherence of an optical beam, their transfer function can be measured by determining first the transfer function L0(f) of an auxiliary lens including a plane-parallel plate directly in front of the image plane, designed to simulate the ground-glass thickness, and then the transfer function L1(f) of the auxiliary lens including the ground glass placed directly in front of the image plane. The transfer function of the ground glass is then given by the quotient L1(f)/L0(f).

© 1972 Optical Society of America

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References

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  1. P. Kuttner, Appl. Opt. 7, 1029 (1968).
    [CrossRef] [PubMed]
  2. K. Mütze, ABC der Optik (Verlag Werner Dausien, Hanau1961), p. 88.

1968 (1)

Kuttner, P.

Mütze, K.

K. Mütze, ABC der Optik (Verlag Werner Dausien, Hanau1961), p. 88.

Appl. Opt. (1)

Other (1)

K. Mütze, ABC der Optik (Verlag Werner Dausien, Hanau1961), p. 88.

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Figures (4)

Fig. 1
Fig. 1

Setup used for measuring the modulation transfer function of ground-glass screens.

Fig. 2
Fig. 2

Photomicrographs of the ground-glass screens taken with 200× magnification. (1) Glass screen ground with a grain size of approx. 5 μm; (2) ground with a grain size of approx. 20 μm; (3) ground with a grain size of approx. 60 μm; (4) etched.

Fig. 3
Fig. 3

Scattering characteristics of ground-glass screens. (1) Glass screen ground with a grain size of approx. 5 μm; (2) ground with a grain size of approx. 20 μm; (3) ground with a grain size of approx. 60 μm; (4) etched; (5) flashed glass.

Fig. 4
Fig. 4

Modulation transfer functions of ground-glass screens. (1) Glass screen ground with a grain size of approx. 5 μm; (2) ground with a grain size of approx. 20 μm; (3) ground with a grain size of approx. 60 μm; (4) etched; (5) flashed glass.

Equations (3)

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L 1 ( f ) = L 0 ( f ) · L M ( f ) .
L M ( f ) = L 1 ( f ) / L 0 ( f ) .
f g = 1 / B λ ,

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