Using the Cal-Plate to Verify Measurement Accuracy
{"Image DocumentName": "Using the Cal-Plate to Verify Measurement Accuracy", "Image ImageDescription": "The Strainoptics GASP CAL-PLATE is a portable, easy to use accessory for verifying the performance of your GASP polarimeter or for ISO self-certification. It is made from soda-lime glass with a known retardation value in a defined area and supplied with a calibration certificate attesting to a factory-certified retardation measurement in nanometers. (Retardation is proportional to stress.) To use the CAL-PLATE, simply take a measurement in the clear area with your GASP and compare the reading with the certified value on the calibration sticker. If the results are within +1 degree, the instrument is measuring properly. If not, then refer to the GASP user manual for instructions on adjusting the zero and protractor, and try again. If still not measuring correctly, contact Strainoptics.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}