Visible Emitting spectrum: Orange red 580-620nm, Blue 430-450nm, Green 530-560nm; Paper, plastic, glass, mental, and ceramic INFRARED (IR) LASER TEST CARDBy converting kinds of invisible near infrared wavelength beam into visible light, IR Laser Test Card is able to detect, track, proofread and identify infrared beam efficiently from various kinds of semiconductor lasers, YAG large laser, IR LED ...