Ocean Optics OOIColor - Manual (Page 6)

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Integration Time
The integration time of the spectrometer is analogous to the shutter speed of a camera. The
higher the value specified for the integration time, the longer the detector “looks” at the
incoming photons. If your intensity is too low, increase this value; if too high, decrease the
value. The following table lists the valid integration times for each spectrometer and A/D card:
Spectrometer ADC500 DAQ-700
S1000 8 msec – 16 seconds 40 msec – 16 seconds
S2000 4 msec – 60 seconds 20 msec – 60 seconds
Samples to Average
The value entered here sets the number of discrete spectral acquisitions that are accumulated
before OOIBase32 receives a spectrum. The larger the value, the better the signal-to-noise
(S:N ) ratio . The S:N improves by the square root of the number of spectra averaged.
Boxcar Smoothing Width
The value entered here sets the boxcar smoothing width, a technique that averages across
spectral data. This method averages a group of adjacent detector elements. A value of 5, for
example, averages each data point with 5 points (or bins) to its left and 5 points to its right. The
greater this value, the smoother the data and the higher the S:N. However, if the value entered
is too high, a loss in spectral resolution results. The S:N improves by the square root of the
number of pixels averaged.
Delay Between Acquisitions
This number controls the amount of time between spectral acquisitions. If you enter a 0 for
this value, the worksheet will acquire data as fast as possible. The Stop Acquisition button
will not operate, and you will have to press Esc to stop the acquisition. If you enter a number
greater than or equal to 1, you will be able to switch screens, stop the acquisition or even
retake a reference during the acquisition.
Observer
Check the observer that you wish to use.
Illuminant Type
Check the type of illuminant that you wish to use for the calculations.
Type of Color Measurement
Check the type of color measurement that you are performing.
Type of Reference Tile
Check the type of reference tile that you are using. These values are described in the
Experiment Tutorial section.