Total reflectance of metals at 294 K (21 C), measured using an integrating sphere. Data are to be used as "reference values only" as actual values will depend on the state of the metal surface and its polish.
Format
A reflector_mspct object named metals.mspct containing
a collection of reflector_spct objects each with 47 rows and 2
variables.
The variables for each spectrum are as follows:
w.length(nm)Rfr(fraction)
These member objects contain metadata stored as R attributes. Accessors to
the metadata are available: what_measured(), how_measured(),
when_measured(), and comment().
References
Ernie W. Spisz, Albert J. Weigund, Robert L. Bowmun, and John R. Juck (1969) SOLAR ABSORPTANCES AND SPECTRAL REFLECTANCES OF 12 METALS FOR TEMPERATURES RANGING FROM 300 TO 500 K NASA TN D-5353, Technical Note, Washington DC, 22 pp. (Data from Table II (a))
Examples
metals.mspct$gold
#> Object: reflector_spct [47 x 2]
#> Wavelength range 330-2160 nm, step 13-260 nm
#> Label: Gold
#> Variables:
#> w.length: Wavelength [nm]
#> Rfr: Total spectral reflectance [/1]
#> --
#> # A tibble: 47 × 2
#> w.length Rfr
#> <dbl> <dbl>
#> 1 330 0.309
#> 2 354 0.312
#> 3 377 0.325
#> 4 398 0.337
#> 5 415 0.338
#> 6 430 0.336
#> 7 444 0.34
#> 8 457 0.338
#> 9 470 0.344
#> 10 483 0.353
#> # ℹ 37 more rows
summary(metals.mspct$gold)
#> Summary of reflector_spct [47 x 2] object: anonymous
#> Wavelength range 330-2160 nm, step 13-260 nm
#> Label: Gold
#> Variables:
#> w.length: Wavelength [nm]
#> Rfr: Total spectral reflectance [/1]
#> --
#> w.length Rfr
#> Min. : 330.0 Min. :0.3090
#> 1st Qu.: 518.0 1st Qu.:0.6325
#> Median : 701.0 Median :0.9460
#> Mean : 829.5 Mean :0.7929
#> 3rd Qu.:1024.0 3rd Qu.:0.9860
#> Max. :2160.0 Max. :1.0000
what_measured(metals.mspct$gold)
#> [1] "Gold"
how_measured(metals.mspct$gold)
#> [1] NA
cat(comment(metals.mspct$gold))
#> Ernie W. Spisz, Albert J. Weigund, Robert L. Bowmun, and John R. Juck (1969)
#> SOLAR ABSORPTANCES AND SPECTRAL REFLECTANCES OF 12 METALS FOR TEMPERATURES RANGING FROM 300 TO 500 K
#> NASA TN D-5353, Technical Note, Washington DC, 22 pp. (Data from Table II (a))
names(metals.mspct)
#> [1] "aluminum" "copper" "gold" "molybdenum"
#> [5] "nickel" "platinum" "silver" "stainless_steel"
#> [9] "tantalum" "tin" "titanium" "vanadium"
summary(metals.mspct)
#> Summary of reflector_mspct [12 x 1] object: metals.mspct
#> # A tibble: 12 × 8
#> spct.idx class dim w.length.min w.length.max colnames multiple.wl Rfr.type
#> <chr> <chr> <chr> <dbl> <dbl> <list> <dbl> <chr>
#> 1 aluminum refl… [47 … 330 2160 <chr> 1 total
#> 2 copper refl… [47 … 330 2160 <chr> 1 total
#> 3 gold refl… [47 … 330 2160 <chr> 1 total
#> 4 molybden… refl… [47 … 330 2160 <chr> 1 total
#> 5 nickel refl… [47 … 330 2160 <chr> 1 total
#> 6 platinum refl… [47 … 330 2160 <chr> 1 total
#> 7 silver refl… [47 … 330 2160 <chr> 1 total
#> 8 stainles… refl… [47 … 330 2160 <chr> 1 total
#> 9 tantalum refl… [47 … 330 2160 <chr> 1 total
#> 10 tin refl… [47 … 330 2160 <chr> 1 total
#> 11 titanium refl… [47 … 330 2160 <chr> 1 total
#> 12 vanadium refl… [47 … 330 2160 <chr> 1 total