Laser laka invenna lens tihfai leh enkawl dan .

Focusing lens-a material chu a chhe thei a, a fragile a, a chung lamah anti reflective film a awm a, chu chu boruak bawlhhlawh, tui, oil leh scratch hlauhna a ni. Hnathawh chhung hian boruak vawt leh degreased tak pek tur a ni a, tihfai nana hmanraw leh hman dan tur rawt a ni bawk.
Thil hmanrua hian hnathawh laiin boruak pressure tling a siam tur a ni. Operation hmain gas blowing leh pressure chu i kut zungtang hmanga focusing lens light outlet thlenga thlen theih a ni.

Nitin a vawi khatna atana i tan hmain, focusing lens awmna lens barrel chu la chhuakin a bawlhhlawh a nih chuan en rawh. Focusing lens tihfai dan tur principle chu a theih ang anga bawlhhlawh paih loha tihfai loh tur a ni a, chu chu bawlhhlawh a awm chuan tihfai nghal vat tur a ni.
tihfai dan tur .

Fastening screw te chu phelh la, air nozzle leh lens barrel te chu a hnuaia mi ang hian la chhuak la, a hmasa berah blowing balloon hmangin lens chunglama leivut chu thlak rawh.

Lens i tihfai a ngai a nih chuan laboratory grade paper cotton ball acetone emaw high-purity alcohol emaw a in tur dik taka dip hmang la, lens lairil atanga a sir lam hawiin darkar lam hawiin rotate rawh. A tul chuan a sir lehlamah uluk tak leh uluk takin silfai tur a ni.

Lens barrel leh air nozzle te chu dah la, focal length te chu siam tha la, fastening screw te chu khih rawh .