| The implementation of a compact contact microscope developed by Chen Feng, which can be used in-vivo to study the cornea in human eyes, is presented. The microscope has a variable focal length, so it can be focused at any depth through the entire thickness of the cornea. An objective lens is spring loaded against the cornea so that small eye movements can occur during the examination. The distance between the objective lens and rear optics is adjustable to accommodate the movements of the eye without significantly affecting the image quality. Image processing software can be used to enhance and display the cornea images. The optomechanical implementation of this optical design was performed, and the optomechanical design features of the microscope are discussed. Performance results for the constructed microscope are given. Three phases of testing were performed on chicken, rabbit and human corneas, and results from these tests are presented. |
