Abstract

Optical coatings deposited on rough black surfaces permit one to reduce scattering and increase absorption with broadband properties. To optimize the optogeometrical parameters (thickness, refractive index) of the coating, to obtain the best performances, it is necessary to know the refractive index of the bare surface. For this purpose we use both theoretical and experimental approaches. It is shown that with our method the total amount of scattered light from a common standard black surface can be reduced by a factor of 10. An absorption of greater than 99.5% is obtained.

© 1998 Optical Society of America

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References

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    [CrossRef]
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    [CrossRef] [PubMed]
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    [CrossRef]

1997 (2)

1996 (1)

1995 (1)

1994 (2)

1993 (1)

1992 (1)

1986 (1)

C. Amra, G. Albrand, P. Roche, “Theory and application of antiscattering single layers: antiscattering antireflection coatings,” Appl. Opt. 16, 2695–2702 (1986).
[CrossRef]

1980 (1)

Albrand, G.

C. Amra, G. Albrand, P. Roche, “Theory and application of antiscattering single layers: antiscattering antireflection coatings,” Appl. Opt. 16, 2695–2702 (1986).
[CrossRef]

Amra, C.

Apfel, J. H.

Bennett, J. M.

Deumié, C.

Dobrowolski, J. A.

Dumas, P.

Elson, J. M.

Giovannini, H.

Kaplan, H.

H. Kaplan, “Black coatings are critical in optical design,” Photon. Spectra 31, 48–50 (1997).

Kemp, R. A.

Li, L.

Pelletier, E.

Rahn, J. P.

Richier, R.

Roche, P.

C. Amra, G. Albrand, P. Roche, “Theory and application of antiscattering single layers: antiscattering antireflection coatings,” Appl. Opt. 16, 2695–2702 (1986).
[CrossRef]

Appl. Opt. (7)

J. Opt. Soc. Am. A (2)

Photon. Spectra (1)

H. Kaplan, “Black coatings are critical in optical design,” Photon. Spectra 31, 48–50 (1997).

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Figures (2)

Fig. 1
Fig. 1

Numerical results: (a) Angular scattering in different cases: λ0 = 0.633 μm, normal incidence, incident plane wave, TE polarization. Solid curve, bare surface; dash–dot curve, black paint covered with a quarter-wave layer with n = 2.10; dashed curve, black paint covered with a quarter-wave layer with n = 1.30. (b) Same as (a) in TM polarization.

Fig. 2
Fig. 2

Experimental results: λ0 = 0.633 μm, spot size = 6 mm2, normal incidence.

Tables (1)

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Table 1 Computed and Measured TISa

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