1. Siv lub focal ntev los hu rau hauv ib qho kev pom: Txhua qhov focal ntev muaj qhov ntev. Yog hais tias qhov ntev ntawm lub laij lej tsis raug, cov txiaj ntsig engraving yuav tsis zoo ib yam.
2. Lub thawv yog muab tso rau hauv qhov chaw ruaj khov kom lub galvanometer, daim iav teb thiab lub rooj sib tham tsis zoo ib yam, vim hais tias tus pas nrig thiab cov zis yuav muaj qhov ntev sib txawv, ua rau cov khoom tsis sib xws.
3. Qhov tshwm sim ntawm lub lens thermal: Thaum lub laser hla ntawm lub lens optical (refraction, reflection), lub lens heats thiab ua rau me ntsis deformation. Qhov no deformation yuav ua rau muaj kev nce hauv laser tsom thiab shortening ntawm lub focal ntev. Thaum lub tshuab nyob ruaj khov thiab qhov kev ncua deb tau hloov pauv hauv kev tsom, tom qab lub laser tau qhib rau lub sijhawm, lub zog ntom ntom ntawm lub laser ua rau cov khoom hloov pauv vim qhov tshwm sim ntawm thermal lensing tshwm sim, ua rau cov tsis sib xws uas cuam tshuam cov qhab nia. .
4. Yog tias vim li cas cov khoom siv, cov khoom ntawm ib pawg ntawm cov ntaub ntawv tsis sib xws, qhov tshwm sim ntawm lub cev thiab tshuaj lom neeg hloov pauv yuav txawv. Cov khoom yog rhiab heev rau laser teb. Feem ntau, kev cuam tshuam ntawm ib qho tseem ceeb yog tas li, tab sis tsis cuam tshuam cov khoom ua rau cov khoom tsis raug. Cov nyhuv yog biased vim hais tias tus nqi ntawm laser zog uas txhua yam khoom yuav tau txais yog txawv, ua rau unevenness nyob rau hauv cov khoom.