For many decades, optical surface quality has been graded using visual comparison standards. To maintain consistency and accuracy in this process, a range of scratch-dig reference sets has been developed and marketed by various suppliers. Please see our blog on ‘Scratch-Dig Comparison Sets and Paddles: Buyers’ Guide’ for an overview of the standards.
RedLux scratch-dig reference standards are designed to provide a reliable basis for grading of optical surface defects. They have been developed in collaboration with our customers to meet the demands of high-quality inspection of optical surface quality.
For cosmetic and visibility based evaluation of optical surface quality and scratch-dig.
Applicable Standards:
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