Abstract

Comprehensive test specifications have been developed for the Beckman DK spectrophotometers, which may be applied, with appropriate modifications, to other recording photoelectric spectrophotometers.

Average performance of a random sample of DK-2’s as defined by these tests, has been calculated.

© 1958 Optical Society of America

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References

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  1. , Beckman Instruments, Inc., Fullerton, California.
  2. , Beckman Instruments, Inc., Fullerton, California.
  3. Cary and Beckman, J. Opt. Soc. Am. 31, 682 (1941).
    [Crossref]
  4. , p. 8, Beckman Instruments, Inc., Fullerton, California.

1941 (1)

J. Opt. Soc. Am. (1)

Other (3)

, p. 8, Beckman Instruments, Inc., Fullerton, California.

, Beckman Instruments, Inc., Fullerton, California.

, Beckman Instruments, Inc., Fullerton, California.

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Figures (10)

Fig. 1
Fig. 1

Final operational tests for the DK-2 spectrophotometer. The DK-1 tests are identical, except for scanning speed and chart expansion settings, and the duration of test 1.

Fig. 2
Fig. 2

Switching tests for the DK-1 and DK-2 spectrophotometers.

Fig. 3
Fig. 3

Ultraviolet stray radiation test, instrument 120922. Full scale on the chart is 10%. Vycor sample.

Fig. 4
Fig. 4

Infrared stray radiation test, instrument 120922. Full scale on the chart is 10%. Vycor sample.

Fig. 5
Fig. 5

Infrared resolution in the 2.7-μ water vapor bands. Bands 2 mμ apart are resolved. Instrument 120922 had exceptionally good resolution here, 57.8%.

Fig. 6
Fig. 6

Resolution of No. 120922 at the 577–579 mμ Hg emission lines. Value of 7.5% is within the tolerance but above average.

Fig. 7
Fig. 7

Resolution of No. 120922 in the ultraviolet, using benzene vapor in a sealed cell. Resolution is better than 0.2 mμ.

Fig. 8
Fig. 8

100% stability. Distribution of maximum deviation on 190 instruments made in 1955.

Fig. 9
Fig. 9

Ultraviolet 100% line. Distribution of maximum deviation at 210 mμ for 190 instruments made in 1955.

Fig. 10
Fig. 10

Ultraviolet stray radiation at 205 mμ. Distribution for 190 instruments made in 1955. This parameter has been improved substantially in the past year by selection of prisms, etc.

Equations (1)

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T ( 259.5 ) - T ( 259.3 ) T ( 258.4 ) 0.15.