§ ICO · ORI

Optics, Refraction & Instruments — bench

Five formulas cover ~80% of what ORI throws at you. Practise the calculation, see every step, keep the rule-of-thumb that examiners want you to recall in your head.

ORI · optics bench

Vergence

V′ = V + P at a refracting surface

n (object side)n' (image side)l (object dist, m)P (power, D)

1.Object vergence V: n / l = 1 / -0.5-2.000 D
2.Image vergence V': V + P = -2.000 + 4341.000 D
3.Image distance l': n' / V' = 1.336 / 41.0000.033 m

Result · 0.033 m