Introduction

The difference between the imaging of the actual optical system and the imaging of the ideal optical system is called aberration, and this parameter is mainly used for evaluating the imaging quality of the optical system; transfer function measurement is a method commonly used in engineering for evaluating the imaging quality of the optical system. Optical system aberration theory and transfer function measurement is an important chapter in the course of Engineering Optics. The developed aberration measurement experiment adopts specially designed aberration lens with clear aberration phenomenon; the transfer function measurement experiment adopts the resolution direct reading method and the modulation transfer function (MTF) measurement method, which is closely related to the actual engineering application. This experiment is close to the optoelectronic teaching content, suitable for photoelectricity undergraduate experiments, can also be used as training equipment for higher vocational colleges, universities and factory production inspection.

Experiments

Computer simulation of optical system aberrations;

Adjustment and use of parallel light tubes;

Optical system position chromatic aberration measurement experiment;

Optical system vertical axis chromatic aberration measurement experiment;

Optical system spherical aberration observation experiment;

Optical system coma observation experiment;

Optical system astigmatism observation experiment;

Optical system field curvature observation experiment;

Optical system barrel and cushion aberration measurement;

Experiments of measuring optical system aberration by the principle of shadow method of knife-edge instrument and shadow method;

Measuring optical system resolution by direct reading method of resolution plate;

Experiments of measuring MTF value of optical system by utilizing variable frequency Ranch grating;

Experiments of measuring MTF value of optical system based on line diffusion function;

Positive lens focal length measurement experiment;

Negative lens focal length measurement experiment.

Experimental Knowledge

Spherical aberration, coma, field curvature, astigmatism, chromatic aberration, resolution, Rayleigh criterion, modulation transfer function (MTF), line spread function, and national standard resolution plate of optical systems.

Typical Testing

                             Software                    Aberration, Astigmatism, Field Curvature&Distortion Result

             Aberration Lens and Bracket                                                       Collimator