Chiyero chekurapa kwechiedza chinoverengerwa nefomula iyi:
Kuwanda kweSimba x Nguva = Dose
Nerombo rakanaka, zvidzidzo zvechangobva kuitwa zvinoshandisa mayuniti akajairwa kutsanangura maitiro avo:
Kuwanda kwesimba mu mW/cm² (milliwatts pa centimeter yakaenzana nemativi mana)
Nguva mumasekondi (s)
Dose muJ/cm² (Joules pa centimeter yakaenzana nemativi mana)
Pakurapa nechiedza kumba, simba rakawanda ndiro chinhu chikuru chaunofanira kuziva - kana usingazvizivi, hauzokwanisi kuziva kuti unofanira kushandisa mudziyo wako kwenguva yakareba sei kuti uwane dose rakati. Ingori chiyero chekuti chiedza chakasimba sei (kana kuti mangani maphoton ari munzvimbo).
Nema LED anobuda ne angled, chiedza chinopararira pachiri kufamba, chichifukidza nzvimbo yakakura uye yakafara. Izvi zvinoreva kuti simba rechiedza pane chero nzvimbo rinowedzera kuderera sezvo daro kubva parinobva richikwira. Kusiyana kwema angles emwenje pa LED kunokanganisawo huwandu hwesimba. Semuenzaniso, LED ye 3w/10° icharatidza huwandu hwesimba rechiedza kupfuura LED ye 3w/120°, iyo icharatidza chiedza chisina kusimba panzvimbo yakakura.
Zvidzidzo zvekurapa nechiedza zvinowanzoshandisa simba remagetsi re ~10mW/cm² kusvika pa ~200mW/cm².
Dose iri kungokuudza kuti simba iroro rakashandiswa kwenguva yakareba sei. Kuwanda kwechiedza zvinoreva kuti nguva yekuisa mushonga ishoma:
5mW/cm² inoshandiswa kwemasekonzi mazana maviri inopa 1J/cm².
20mW/cm² inoshandiswa kwemasekonzi makumi mashanu inopa 1J/cm².
100mW/cm² inoshandiswa kwemasekonzi gumi inopa 1J/cm².
Aya mayuniti e mW/cm² nemasekonzi anopa mhedzisiro mu mJ/cm² - ingowedzera izvozvo ne 0.001 kuti uwane mu J/cm². Fomura yakazara, tichifunga nezvemayuniti akajairwa, saka ndeiyi:
Dose = Simba Kuwanda x Nguva x 0.001