Initial structure parameters determination and aberration optimization method for ultra-wide angle optical system with large aperture

Ultra-wide angle optical system is symmetry with respect to sagittal plane and has plane-symmetric imaging performance, and it is widely used for the fields of security and protection monitoring, robot navigation and so on. Therefore, a method for initial structure parameters determination and aberration optimization of fish-eye lens optical system with large aperture is proposed using sixth-order wave aberration theory and Zemax software. Firstly, initial structure parameters of pre-group optical system is obtained using transfer equation of principal ray of ultra-wide angle optical system, and then applying sixth-order wave aberration calculation expressions of fish-eye lens optical system to calculate its field curvature, chromatic, coma and spherical wave aberration; secondly, based on the balance equations of the above wave aberration of pre- and post-group optical system, the optical parameters of each lens of post-group and the spacing between them are obtained; and finally, combining with Zemax software and applying the sixth-order wave aberration expressions to analyze various types of aberration of optical system, an fish-eye lens is designed and it has the characteristics of large aperture, good imaging quality, lightweight, small size, and has a great practical application value in many fields. This method proposed in this paper will provide an effective measurement for design ultra-wide angle optical system with large aperture.