// multi-utility computation suite · offline · instant · precise
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│ [c] calcalyst_ │
│ computation suite │
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sci.thin-lens-focal-length Calculator
Calculates image position, object position, and focal length using the thin lens equation 1/f = 1/do + 1/di for a single converging or diverging lens. Real images (di > 0) form on the opposite side of a converging lens — virtual images (di < 0) form on the same side and are upright but not projectable.
Inputs
R1 Mm
Distance from centre to edge of a circle. Radius = diameter / 2.
R2 Mm
Distance from centre to edge of a circle. Radius = diameter / 2.
N Lens
Reference formula or conversion factor shown for context.
Results
focal length f (mm)
The computed linear length.
optical power (diopters)
Reference formula or conversion factor shown for context.
lens type
The classification or type assigned based on the inputs.