Direct determination of f-number by using Ronchi test

Area of Science:

• Optical Engineering
• Imaging Systems Analysis

Background:

• Accurate determination of the f-number is crucial for characterizing imaging system performance.
• Existing methods may rely on specific parameters or complex setups.

Purpose of the Study:

• To introduce a new, parameter-independent method for determining the f-number of an imaging system.
• To validate the proposed method against established techniques and software.

Main Methods:

• The study employs the Ronchi test for f-number determination.
• Investigated two different aperture sizes within a common imaging system.
• Compared experimental results with lens design software calculations.

Main Results:

• The Ronchi test-based method successfully determined the f-number without relying on particular parameters.
• Experimental f-numbers showed consistency with values calculated by lens design software.
• Results were consistent across different aperture sizes tested.

Conclusions:

• The proposed Ronchi test method provides a robust and versatile approach for f-number determination in imaging systems.
• This parameter-independent technique simplifies optical system characterization.
• The method's reliability is confirmed through comparative analysis.