Laser waa xalka kale ee loo yaqaan 'sandpap' ee ka shaqeynta si loo fuliyo baahiyaha cusub ee ka baaraandegidda iyo wax soo saarka diskiga dabacsan, kuwaas oo ka baxsan gaaritaanka dhimista dhaqanka.
Si loo wanaajiyo heerka soosaarka boodhka oo sii dheeraata nolosha sandsiga disc, inbadan oo godad ka soo baxa boodhka tayada leh ee tayada leh ayaa loo baahan yahay in lagu soo saaro dusha sare ee diskiga sare. Fursad macquul ah oo lagu soo saarayo godad yar oo ku saabsan sandpap-ka waa in la adeegsadaaWarshadaha CO2Nidaamka goynta leser.