A collection of lamp emission spectra for an Aputure Amaran pocket-sized daylight-balanced LED light type AL-M9.
Format
amaran_m9.mspct is a "source_mspct" object containing
a collection of 6 "source_spct" objects as members. Members are
named.
Details
amaran_m9.mspct contains a collection of
"source_spct" objects with spectral emission data for six different
dimming settings. The lamp was maintained at the same distance of 160 mm
from the input optics of the spectrometer. In all cases the diffuser was
kept in place. Thus, the different spectra are comparable and provided
expressed in calibrated spectral energy irradiance units.
This light source has 9 LEDs in a 3 \(\times\) 3 grid. The LEDs are in SMD packages. A built-in Lithium battery powers it. It comes with a detachable plastic diffuser
The variables in each member spectrum are as follows:
w.length (nm)
s.e.irrad (\(\mathrm{W\,m^{-2}\,nm^{-1}}\))
Note
Instrument used: Ocean Optics Maya2000 Pro single-monochromator array
spectroradiometer with a Bentham cosine corrected input optics. A complex
set of corrections and calibration procedure used. The source_spct
objects have attributes with additional information on the measurement and
data processing. Measurements done by Pedro J. Aphalo. Data acquired and
processed using R packages 'ooacquire' and 'photobiology'.
References
Lamp manufacturer: https://aputure.com/.
Aphalo, Pedro J. (2022) Small fill/video LED lights revisited: A new comparison. https://www.photo-spectrum.info/pages/illumination/led-fill-lights-2.html.
Examples
summary(amaran_m9.mspct)
#> Summary of source_mspct [6 x 1] object: amaran_m9.mspct
#> # A tibble: 6 × 8
#> spct.idx class dim w.length.min w.length.max colnames multiple.wl time.unit
#> <chr> <chr> <chr> <dbl> <dbl> <list> <dbl> <Duratio>
#> 1 dimmed.9… sour… [297… 251. 899. <chr> 1 1s
#> 2 dimmed.7… sour… [297… 251. 899. <chr> 1 1s
#> 3 dimmed.5… sour… [323… 251. 899. <chr> 1 1s
#> 4 dimmed.3… sour… [356… 251. 899. <chr> 1 1s
#> 5 dimmed.1… sour… [425… 251. 899. <chr> 1 1s
#> 6 dimmed.0… sour… [498… 251. 899. <chr> 1 1s