Question

how to convert diopter into meter?

Answer 1

Suppose an object is at 1/2 meter. Converted to centimeters, the object is 50 cm away. Divide 100 by 50 and the result is 2 D of power needed to focus at this distance. The formula to remember is D = 100/F, where D is diopters and F is the focal length (or distance) in centimeters.

Answer 2

By taking reciprocal of diopter.

Explanation:

• Diopter is the measure unit of the optical power of a lens or a curved mirror which taken to be the reciprocal of the focal length of the optical instrument.

$D=\frac{1}{f}$

Therefore, larger the focal length less is the diopter power.

• It denotes the magnifying power of an optical instrument. The algebraic sign of this quantity indicates whether the lens causes an incident of parallel light rays to converge or to diverge.

• If the value is negative it means that the instrument is of diverging nature and if the value is positive this means the light rays converge after refraction through it.

• When more than one thin lenses are combined then the algebraic sum of the diopter power becomes equal to the resulting power of the lens.

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TOPIC: optical power

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