Ka whakamahia e ngā mīhini tohu reiti muka he hihi reiti kaha-nui e arotahi tika ana ki te mata PCB. Ka mimiti, ka tango rānei te pānga wera i ngā paparanga whakarewa, paninga rānei, ka whakairo i ngā tauira pai, ngā tuhinga, ka tango rānei i ngā paninga taikaha me te tino tika, ā, he mea tino pai mō ngā ara iahiko uaua me ngā tohu iti-wāhi.

Hei tukanga kore-pā, ka whakakorehia e te tohu laser te pakaru ā-mīhini, ka tiakina te mata PCB. Hei tāpiri, kāore e hiahiatia he otinga whakairo matū, kia pai ai te tukanga hanga taiao, kia whai hua hoki.

Ka arotahi ngā mīhini tohu taiaho muka i ngā hihi taiaho kaha-nui ki te mata o te kāri SD, ka puta ai ngā huringa tae (pēnei i te waikura, te pirau wera rānei) me ngā whakarerekētanga kakano o te mata mā roto i ngā pānga wera, ka kitea ai ngā tohu.

Mā tēnei tukanga ka tino tika, ka roa hoki te mau o te tohu, ka ārai i te pakaru, i te tango rānei, ā, he mea tino pai mō te whakamahinga roa me te tautuhi taputapu rokiroki pono.

Ka whakamahia e ngā mīhini tohu taiaho CO₂ he hihi taiaho pūwhero 10.6μm hei hanga tohu ki ngā mata o te waeine mahara. Ina arotahihia ki te PCB, ka wera, ka waikura, ka pirau rānei ngā rauemi i te pānga wera nui-pūngao, ka hua ake he huringa tae ka hanga he tohu pumau.

Hei tukanga kore-pa, kāore te tohu taiaho e pā ki te mahi hiko, ki ngā āheinga rokiroki raraunga rānei o te waeine mahara. Ka noho tonu te wera kukū ki te mata, kia kore ai e pā ki ngā maramara o roto, ki ngā ara iahiko rānei, kia mau tonu ai te pono me te pono o te hua.

Mā ngā mīhini tohu taiaho UV ka tāpirihia ngā tohu ki ngā maramara kua kapi ki te kapia epoxy mā te whakamahi i tētahi pūtake mārama makariri, ka taea ai te tohu tino tika me te iti o te pānga wera. Mā tēnei ka ārai i te kino wera ki te maramara me ngā hanganga huri noa, ka whakarite kia haumaru te tukanga tohu me te pumau o ngā rauemi.

Mā te kaha nui o te pūngao, ka tangohia tika e ngā taiaho UV te mata o te kapia epoxy, ka hangaia he tohu koi, he pakari hoki. Ka whakanui ake tēnei i te āheinga o te whai i ngā maramara me te pupuri tonu i te pumau o te takai me te kounga o te hua.

E whakamahia whānuitia ana te PA (Polyamide, arā, ko te nairona) i roto i ngā poraka hiko, motuka, me ngā poraka ahumahi nā te mea he tino ātete ki te kakahu, ki te ātete matū, ki te kaha miihini, me ōna āhuatanga whakamarumaru hiko.

Ko te tikanga, ka whakamahia e te tohu reera muka ngā hihi reera poto-roa, he nui te kaha (hei tauira, 1064nm). Ina arotahihia ki te mata PA, ka whakaohohia e te kaha kukū he tauhohenga wera, ka puta he waikura i ngā huānga waro i roto i te rauemi, ka hanga he paparanga waro pango. Ka wawahia e tēnei tukanga ngā wāhanga waro, ka tangohia te makuku me ngā mea pupuhi, ā, ka waiho he tohu pouri nui-waro, ka whakarite kia teitei te rerekētanga me te ngāwari ki te pānui ki te rauemi PA.

Mā te tohu taiaho UV ka hangaia he tohu pumau, ā, ka kitea nuitia i runga i ngā whare optocoupler mā te whakapūmau waro me te wetewete wera. Mā tēnei tukanga ka whakarite kia tino tika, kia kaha te rerekētanga, kia tino pakari hoki. He whānuitia te whakamahinga o te tohu taiaho UV mō te tautuhi pumau, ngā tau rangatū, ngā waitohu kamupene rānei i runga i ngā whare optocoupler momo-pūtau, inā koa i roto i ngā tono ahumahi me ngā tono hiko, kia roa ai te mārama me te pumau.