Abstract

Transmissivities were measured and absorption coefficients derived for three types of fused quartz between room temperature and 1500°C: GE uv Type 151 (0.21–2.0 μ), GE ir Type 105 (0.21–3.5 μ), and Corning Vycor ir glass No. 7905 (1.7–4.0 μ). Less extensive measurements were also performed with Corning uv Type 7940. The interval of virtual transparency (transmissivity ≳ 0.85) of each type between the ultraviolet and near-infrared was reduced by heating due to a shift in both the long- and short-wavelength absorption edges.

© 1971 Optical Society of America

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References

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  1. R. W. Ziemer, “RMIP Project Final Report, Flight Window Calibration Tests,” TRW Systems Group Report No. 06488-6405-R000 (1970). (The fused quartz transmission measurements reported here were made by C. D. Bass and R. Barth.)
  2. C. D. Bass, “Optical Window Properties Oven Tests,” TRW Systems Group Report No. 06488-6067-R000 (1967).
  3. J. F. Spivak, “High Temperature IR transmission Studies of Ultrasil Fused Quartz for Project Fire,” Republic Aviation Corporation RAC 499-38 (RD-TR-64-637) (1964).
  4. D. T. Gillespie, A. L. Olsen, L. W. Nichols, Appl. Opt. 4, 1488 (1965).
    [CrossRef]
  5. Corning Glass Works Bulletin CIR-2 (20Nov.1959).
  6. H. O. McMahon, J. Opt. Soc. Am. 40, 376 (1950).
    [CrossRef]
  7. L. Prod’homme, Verres Refractaires 10, 267 (1956).
  8. I. H. Malitson, J. Opt. Soc. Am. 55, 1205 (1965).
    [CrossRef]

1965 (2)

1956 (1)

L. Prod’homme, Verres Refractaires 10, 267 (1956).

1950 (1)

Bass, C. D.

C. D. Bass, “Optical Window Properties Oven Tests,” TRW Systems Group Report No. 06488-6067-R000 (1967).

Gillespie, D. T.

Malitson, I. H.

McMahon, H. O.

Nichols, L. W.

Olsen, A. L.

Prod’homme, L.

L. Prod’homme, Verres Refractaires 10, 267 (1956).

Spivak, J. F.

J. F. Spivak, “High Temperature IR transmission Studies of Ultrasil Fused Quartz for Project Fire,” Republic Aviation Corporation RAC 499-38 (RD-TR-64-637) (1964).

Ziemer, R. W.

R. W. Ziemer, “RMIP Project Final Report, Flight Window Calibration Tests,” TRW Systems Group Report No. 06488-6405-R000 (1970). (The fused quartz transmission measurements reported here were made by C. D. Bass and R. Barth.)

Appl. Opt. (1)

J. Opt. Soc. Am. (2)

Verres Refractaires (1)

L. Prod’homme, Verres Refractaires 10, 267 (1956).

Other (4)

R. W. Ziemer, “RMIP Project Final Report, Flight Window Calibration Tests,” TRW Systems Group Report No. 06488-6405-R000 (1970). (The fused quartz transmission measurements reported here were made by C. D. Bass and R. Barth.)

C. D. Bass, “Optical Window Properties Oven Tests,” TRW Systems Group Report No. 06488-6067-R000 (1967).

J. F. Spivak, “High Temperature IR transmission Studies of Ultrasil Fused Quartz for Project Fire,” Republic Aviation Corporation RAC 499-38 (RD-TR-64-637) (1964).

Corning Glass Works Bulletin CIR-2 (20Nov.1959).

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Figures (6)

Fig. 1
Fig. 1

Schematic of experimental apparatus.

Fig. 2
Fig. 2

Ultraviolet transmissivity for 0.953-cm thickness and absorption coefficient of General Electric (uv) Type 151 fused quartz. Number of samples tested: 6. Spread bars include at least 80% of data. Shaded area: manufacturer’s nominal to minimum values at room temperature for 1 cm.

Fig. 3
Fig. 3

Ultraviolet transmissivity for 0.953-cm thickness and absorption coefficient of General Electric (ir) Type 105 fused quartz. Number of samples tested: room temperature, 8; 750°C, 10; 1000°C, 10; 1250°C, 10; 1500°C, 12. Spread bars include at least 80% of data. Shaded area: manufacturer’s nominal to minimum values at room temperature for 1 cm.

Fig. 4
Fig. 4

Infrared transmissivity for 0.953-cm thickness and absorption coefficient of General Electric (ir) Type 105 fused quartz. Number of samples tested: room temperature, 9; 750°C, 6; 1000°C, 10; 1250°C, 7; 1500°C, 12. Spread bars include at least 80% of data. ao-10-10-2263-i001: manufacturer’s nominal to minimum values at room temperature for 1 cm. Solid symbols (◆, 25°C; ●, 400°C) show 0.9.53-cm transmissivities derived from 0.280-cm tests of Ref. 4.

Fig. 5
Fig. 5

Infrared transmissivity for 0.953-cm thickness and absorption coefficient of Corning Vycor ir transmitting glass No. 7905 (96% silica). Number of samples tested: room temperature, 9; 500°C, 2; 750°C, 8; 1000°C, 2; 1250°C, 2; 1500°C, 2. Spread bars include at least 80% of data. Solid symbols (◆, 25°C; ao-10-10-2263-i002, 600°C) show 0.953-cm transmissivities derived from 0.20-cm data of Ref. 5.

Fig. 6
Fig. 6

Absorption of several uv and ir types of fused quartz between room temperature and 1500°C. ao-10-10-2263-i003 GE ir Type 105 ao-10-10-2263-i004 GE uv Type 151; ao-10-10-2263-i005, ——: Corning Vycor ir glass 7905; - - -: Engelhard (uv type) Ultrasil reported by Spivak.3

Tables (1)

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Table I Instrumentation: Window Transmission Tests with SPEX Spectrometer

Equations (9)

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τ = ( 1 - R ) 2 e - α t / ( 1 - R 2 e - 2 α t ) .
R = [ ( n - n 0 ) / ( n + n 0 ) ] 2 .
τ max = ( 1 - R ) / ( 1 + R )             ( α t 0 ) .
τ = ( 1 - R ) 2 e - α t             ( R 1 ) ,
R = [ ( n - 1 ) / ( n + 1 ) ] 2 ,
τ max = ( 1 - R ) 2             ( R 1 ; α τ 0 ) .
Δ α = - ( 1 / t ) ( Δ τ / τ ) .
α = ( 1 / t ) [ 1 - τ / ( 1 - R ) 2 ] ,
Δ α = - ( 1 / t ) [ 1 / ( 1 - R ) 2 ] Δ τ .

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