This paper discusses the design of a 310 degree fisheye lens. Particular attention is paid to color correction and lens edge overlap. Other issues in the design of fisheye lenses are addressed such as the distortion/mapping, illumination, and overall aberration correction. The general format and structure of fisheye lenses are discussed including a brief history of these fascinating lenses.
This paper describes a CCD camera, which was developed for in-field evaluation of the image quality of electronic display devices like CRTs and LCDs. Contrary to traditional CCD cameras used for image quality evaluation, this camera does not require a sophisticated x-y-z translation stage for mounting and adjustment. Instead it is handheld and pressed by gentle pressure against the display. It is controlled by a software package which was originally developed for the display calibration according to the DICOM 14 GSDF (Grayscale Standard Display Function). This software package controls the camera gain when measurements are made at different display luminance, displays test patterns, performs image analysis and displays the result of the measurements and calculations. Initial work concentrated on the measurement of the MTF of a CRT derived from the line spread function. The obtained MTF deviates only minimally from those obtained with a high performance CCD camera on the same CRT.