1. Ha ho na masalla sebakeng sohle, RFU< 5;
2. Ho sebetsa ka mokhoa o phahameng oa ho otla: Ho ea ka mekhoa e fapaneng ea optical le litlhophiso tsa laser, ho otla ho ka ba ka hare ho metsotsoana ea 0.5;
3. Likarolo tsohle tsa optical li entsoe ka boithaopo, li sebetsoa le ho bokelloa, 'me tsamaiso ea mantlha ea laser e etsoa ka boikemelo;
4. Laser optics le litharollo tsa ts'ebetso li ka hlophisoa ka mokhoa o bonolo ho latela litlhoko tse fapaneng tsa bareki.
