Angular Resolution Calculator

Angular Resolution Calculator calculator can be used to determine the minimum angular separation at which two points of light can be resolved as distinct, based on the wavelength of light and the aperture diameter.

Input Parameters

Calculation Results

Calculation Formula

θ = 1.22 * (λ / D)

Where:
θ = Angular Resolution (in radians)
λ = Wavelength of light (in meters)
D = Aperture Diameter (in meters)

Angular Resolution Calculator Calculator Usage Guide

Learn how to use the Angular Resolution Calculator calculator and its working principles

How to Use the Calculator

  1. Enter the wavelength of light (λ) in meters. This is the distance between successive crests of the light wave.
  2. Enter the aperture diameter (D) of the lens or optical system in meters. This is the diameter of the opening that allows light to pass through.
  3. Click the "Calculate" button to compute the angular resolution (θ).
  4. The result will be displayed in radians. You can convert it to degrees by multiplying by (180 / π).

Working Principle

The angular resolution (θ) is the minimum angular separation between two points of light that can be resolved as distinct. It is determined by the wavelength of light (λ) and the aperture diameter (D) of the optical system using the formula:

θ = 1.22 * (λ / D)

This formula is derived from the diffraction limit of resolution, which states that the smallest angle θ at which two points can be resolved is inversely proportional to the aperture diameter and directly proportional to the wavelength of light.