Sapphire Defect Laser Probe and Glasses
LP-100 - HenergySolar
Easy to use and portable
■ low price with long lifetime
■ can be used to detect many defects, like micro crack, bubbles, impurity, crystal subgrain
■ When the laser go though the crystal, if it is monocrystal the light should be scattering, in macro it should be white.