Sunday, June 22, 2008
Re-engineered system
The re-engineered contrast measurement system for passive LCD displays is now operational. The optics equipment comprises a Canon EOS 40D DSLR camera, a Canon EF 100mm f/2.8 Macro USM lens, a set of Kenko extension tubes, a Newport iris diaphragm, and a SphereOptics integrating sphere housing a fan-cooled 4-watt 12v lamp powered by an Agilent E3634A power supply. The mechanical hardware includes a vibration-free optics table, rails, posts, post holders, and various positional stages to hold and align the optics equipment and the target LCD device. The software comprises DSLR Remote Pro from Breeze Systems, IMAQ Vision Builder from National Instruments, and Imatest Studio running on a laptop computer connected to the camera via USB and the power supply via USB/RS-232.
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The original system is composed (R-to-L in the picture to the left) of a Canon EOS D30 Digital SLR camera, a Leica Z6 APO long-distance microscope zoom lens, an iris diaphragm to control the field of view, and an in-line integrating sphere with a 3-watt lamp as a uniform light source - all horizontally mounted on a vibration-free optics table.
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