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<head>
<title>The i1pro Hi Res. Mode</title>
<meta http-equiv="content-type" content="text/html;
- charset=ISO-8859-1">
+ charset=windows-1252">
<meta content="Graeme Gill" name="author">
</head>
<body>
@@ -42,6 +42,8 @@
+
+
width at half maximum</a>) of about 25nm. Doing a measurement at
3.3nm resolution reveals that the optical limit seems to be about
15nm, so there is some hope of improvement from that perspective.</p>
@@ -56,7 +58,7 @@
which seems to have a diffraction grating/light sensor with a less
smooth spectral efficiency curve than the Rev A - D models, the
task of up-sampling the emissive calibration data with sufficient
- accuracy is a more difficult.<br>
+ accuracy is more difficult.<br>
</p>
<h4 style="text-decoration: underline;">The verification experiment<br>
</h4>
@@ -77,6 +79,8 @@ href="http://www.jeti.com/cms/index.php/instruments-55/radiometer/specbos-1211">
+
+
specbos 1211</a> reference Tele-Spectro-Radiometer.<br>
<br>
2) Using an i1pro2 in standard 10nm mode.<br>
@@ -157,13 +161,17 @@ href="http://www.jeti.com/cms/index.php/instruments-55/radiometer/specbos-1211">
improve colorimetric measurement accuracy of display devices.
Accuracy may conceivably be improved a little more than indicated by
this experiment for i1pro rev A-D instruments which have a smoother
- diffraction grating/light sensor characteristic, or it is also
+ diffraction grating/light sensor characteristic, but it is also
conceivable that an unfortunate combination of display spectra and
- the i1pro2 may result in reduced accuracy. The High Resolution mode
- is primarily useful for showing more spectral detail, and should
- probably not be used for colorimetric measurement when the highest
- possible robustness and reliability is desired. The potential for
- improved accuracy may be of benefit in other situations though. <br>
+ the i1pro2 may result in reduced accuracy. More extensive testing of
+ a range of instruments and illuminants would be needed to allay such
+ a concern. <br>
+ <br>
+ <b>In summary</b>: the High Resolution mode is unquestionably useful
+ for showing more spectral detail, and demonstrates promise of
+ improved accuracy, but should probably not be used used for
+ colorimetric measurement when the highest possible confidence is
+ desired.<br>
<h4 style="text-decoration: underline;">Raw Data:</h4>
The raw measurement data is available in this <a
href="i1proHiRes.zip">.ti3 archive</a>.<br>