Abstract

The design and manufacture of a Ge/SiO multilayer edge filter matched to air by MgF2 are presented. The design is based on the equivalent layers theory and numerical optimization of the analytical structure. The filter has an average transmission of 96% in the 3.2–4.9-μm region, and its rejection zone covers the visible and uv regions.

© 1978 Optical Society of America

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References

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  1. R. Jacobsson, J. Opt. Soc. Am. 54, 422 (1964).
    [CrossRef]
  2. R. H. Miller, Proc. Soc. Photo-Opt. Inst. Eng. 50, 119 (1974).
  3. L. I. Epstein, J. Opt. Soc. Am. 42, 806 (1952).
    [CrossRef]
  4. H. A. Macleod, Thin Film Optical Filters (Hilger, London, 1969).

1974 (1)

R. H. Miller, Proc. Soc. Photo-Opt. Inst. Eng. 50, 119 (1974).

1964 (1)

1952 (1)

Epstein, L. I.

Jacobsson, R.

Macleod, H. A.

H. A. Macleod, Thin Film Optical Filters (Hilger, London, 1969).

Miller, R. H.

R. H. Miller, Proc. Soc. Photo-Opt. Inst. Eng. 50, 119 (1974).

J. Opt. Soc. Am. (2)

Proc. Soc. Photo-Opt. Inst. Eng. (1)

R. H. Miller, Proc. Soc. Photo-Opt. Inst. Eng. 50, 119 (1974).

Other (1)

H. A. Macleod, Thin Film Optical Filters (Hilger, London, 1969).

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Figures (4)

Fig. 1
Fig. 1

Equivalent index for the system (H/2)L(H/2), nH = 4.3, nL = 1.9.

Fig. 2
Fig. 2

Computed transmittance for the analytical (solid) and optimized (dashed) structures of filter A.

Fig. 3
Fig. 3

Computed transmittance for the analytical (solid) and optimized (dashed) structures of filter B.

Fig. 4
Fig. 4

Measured transmittance as a function of wavelength of the complete filter system.

Tables (1)

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Table I Optical Thickness of Each of the Films of the Multilayers after Optimization

Equations (1)

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Filter A : Sapphire | ( H 2 L H 2 ) 7 λ 0 = 2.278 | MgF 2 λ 0 = 4.1 | Air , Filter B : Sapphire | ( H 2 L H 2 ) 7 λ 0 = 1.45 | MgF 2 λ 0 = 4.1 | Air .

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