Abstract

Transmission measurements were made on samples of acrylic, polystyrene, styrene–acrylic copolymer (N.A.S.), polymethyl pentene (TPX), polysulfone, polycarbonate, and Trogamid; molded windows of 5.08-mm thickness were measured over the range 0.4–40.0 μm. All these injection-moldable materials appear to be usable in the visible region, and have surprisingly similar transmission profiles from 1.0 μm to 2.0 μm. Polystyrene and TPX possess several potentially useful transmission windows in the middle-wavelength and long-wavelength infrared regions, particularly TPX. The potential of these materials as substitutes for expensive crystalline materials in infrared application is discussed. The possibility that other thermoplastic materials may offer similar opportunities is also presented.

© 1979 Optical Society of America

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References

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  1. R. T. Conley, Infrared Spectroscopy (Allyn and Bacon, Boston, Mass., 1972), 2nd ed., pp. 244–257.
  2. R. E. Kagarise, L. A. Weinberger, “Infrared Spectra of Plastics and Resins,” Naval Research Laboratory Report 4369 (NRL, Washington, D.C., 1975).
  3. D. H. Schulte, “Field Corrector for Reflecting Telescopes,” in Optical Telescope Technology, NASA SP-233 (1970), pp. 327–334.
  4. A. B. Meinel, Astrophys. J. 118, 335 (1953).
    [CrossRef]

1970 (1)

D. H. Schulte, “Field Corrector for Reflecting Telescopes,” in Optical Telescope Technology, NASA SP-233 (1970), pp. 327–334.

1953 (1)

A. B. Meinel, Astrophys. J. 118, 335 (1953).
[CrossRef]

Conley, R. T.

R. T. Conley, Infrared Spectroscopy (Allyn and Bacon, Boston, Mass., 1972), 2nd ed., pp. 244–257.

Kagarise, R. E.

R. E. Kagarise, L. A. Weinberger, “Infrared Spectra of Plastics and Resins,” Naval Research Laboratory Report 4369 (NRL, Washington, D.C., 1975).

Meinel, A. B.

A. B. Meinel, Astrophys. J. 118, 335 (1953).
[CrossRef]

Schulte, D. H.

D. H. Schulte, “Field Corrector for Reflecting Telescopes,” in Optical Telescope Technology, NASA SP-233 (1970), pp. 327–334.

Weinberger, L. A.

R. E. Kagarise, L. A. Weinberger, “Infrared Spectra of Plastics and Resins,” Naval Research Laboratory Report 4369 (NRL, Washington, D.C., 1975).

Astrophys. J. (1)

A. B. Meinel, Astrophys. J. 118, 335 (1953).
[CrossRef]

Optical Telescope Technology (1)

D. H. Schulte, “Field Corrector for Reflecting Telescopes,” in Optical Telescope Technology, NASA SP-233 (1970), pp. 327–334.

Other (2)

R. T. Conley, Infrared Spectroscopy (Allyn and Bacon, Boston, Mass., 1972), 2nd ed., pp. 244–257.

R. E. Kagarise, L. A. Weinberger, “Infrared Spectra of Plastics and Resins,” Naval Research Laboratory Report 4369 (NRL, Washington, D.C., 1975).

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Figures (10)

Fig. 1
Fig. 1

External transmittance of polysulfone sample 5.08 mm thick for 400–960 nm.

Fig. 2
Fig. 2

External transmittance of TPX sample 5.08 mm thick for 400–960 nm.

Fig. 3
Fig. 3

External transmittance of polystyrene sample 5.08 mm thick for 400–960 nm.

Fig. 4
Fig. 4

External transmittance of acrylic V811 sample 5.08 mm thick for 400–960 nm.

Fig. 5
Fig. 5

External transmittance of N.A.S. sample 5.08 mm thick for 400–960 nm.

Fig. 6
Fig. 6

External transmittance of Trogamid T-G35 sample 5.08 mm thick for 400–960 nm.

Fig. 7
Fig. 7

External transmittance of polycarbonate sample 5.08 mm thick for 400–960 nm.

Fig. 8
Fig. 8

External transmittance of acrylic V811 sample 5.08 mm thick for 940–2850 nm. The external transmittance of acrylic V811 in this spectral region is quite similar to that of the other materials in Figs. 1 through 7.

Fig. 9
Fig. 9

External transmittance of TPX (top) and polystyrene (bottom) samples 5.08 mm thick for 2.5–40 μm.

Fig. 10
Fig. 10

External transmittance for TPX in three thicknesses: (a) for 940–2850 nm, (b) for 2.5–5.0 μm, (c) for 5–10 μm, and (d) for 10–40 μm.

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