Hi all,
I'm working with DIC aiming to validate an FEA model. I've experienced problems in the setup of my experiment as I have been unable to point the sensors (camera cross) to the laser point in my specimen of study. I have followed the guidelines of the fabricant for slider distance, distance from sensor to specimen and trying to adapt the tripod of the equipment.
I corrected this problem by slightly changing the camera angle on both cameras (as suggested in fabricant's manual). However, I was recently told that camera angles must never be moved from 25 degrees. Can somebody aid on this matter? How is the best way to measure camera angle to return them back to their original position?
For anyone with the same question regarding DIC. I solved the issue with help from the manufacturer's guide:
The camera angle is given after calibration has been performed. Ideally, this angle should be 25 and can be preset when the equipment is installed. However, it's possible to rotate the cameras to center the sensor with the cameras (Following manufacturer's manual guide). If the angle isn't 25 and is +- 2 degrees, there isn't much problem. However, as the angle difference(with respect to 25) increases/decreases, it might compromise the results.
After doing some reading, I realized that the main axis being affected is Z, which is usually the one assigned to depth in the specimen of study. Hence, if depth is really important on a 3D measurement, then camera angle is really important.
Hope this helps!
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