TRU 8 / VideoWin 3 Quick Reference Guide
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Confirming the accuracy of the Imager for measuring the DUT
Procedure
1. Make sure that the TRU8, spectroradiometer and DUT have been warmed up for at
least 20 minutes.
2. Align and focus the TRU8 on the DUT. Make sure the distance from the front of the
lens to the target is a minimum of 10 focal lengths of the objective lens. For
example, the focal length of the MS-60 objective is 60 mm, therefore the
recommended distance is 600 mm (1.97 ft.).
3. Measure the DUT with the TRU8.
4. In VideoWin software, generate an AOR with a size of at least 330 x 247 camera
pixels (1% of total camera pixels). If measuring characters on a device, the best
results are obtained when the AOR is smaller than the illuminated portion of the
character (e.g. character stroke). If measuring a flat field image on devices such as
an LCD or OLED, follow the suggestion of the IDMS above for the correct measuring
area of the DUT.
5. Align and focus the spectroradiometer on the DUT. Make sure that the measuring
aperture covers the same area as the AOR created in Step 4.
6. When measuring the DUT, the spectroradiometer is the reference instrument. If the
TRU8 does not agree with the spectroradiometer, it will be necessary to generate
calibration factors either through the Matrix Calibration function (for adjustable
DUT’s
such as
LCD’s and OLED’s) or single color calibration factors using the Color
Correction feature of VideoWin.
7. Consult the VideoWin 3 Instruction Manual for detailed information regarding the
Matrix Generator and Color Correction Factor features.
Matrix Generator
Color Correction Factors