Optical Resolution Calculator
Calculate optical resolution limits using Rayleigh criterion and diffraction theory
About this calculator
The Optical Resolution Calculator determines the minimum resolvable distance between two point sources using the Rayleigh criterion and diffraction theory. This fundamental tool helps photographers, astronomers, and optical engineers understand the theoretical limits of their optical systems. By calculating the angular and linear resolution based on wavelength, aperture diameter, and observation distance, users can optimize their equipment selection and understand performance constraints in various optical applications.
How to use
Enter the wavelength of light (in nanometers), the aperture diameter of your optical system (in millimeters), and the observation distance (in meters). The calculator will instantly compute both angular resolution in arcseconds and linear resolution at your specified distance, showing the minimum separation your optical system can theoretically resolve.
Frequently asked questions
What is the Rayleigh criterion for optical resolution?
The Rayleigh criterion defines two point sources as just resolved when the central maximum of one diffraction pattern coincides with the first minimum of the other.
How does aperture size affect optical resolution?
Larger apertures provide better resolution because they reduce diffraction effects, allowing smaller angular separations to be distinguished between point sources.
What wavelength should I use for white light calculations?
For white light applications, use 550 nanometers as it represents the peak sensitivity of human vision in the visible spectrum.