METHODS AND APPARATUS FOR DIGITAL OCULAR IMAGING

摘要

An ocular fundus camera (101) has a light source for illuminating the fundus of an eye to be tested, an illuminating path for projecting an illuminating beam from the light source to the fundus, and an imaging path for viewing a desired portion of the fundus. The light source is a halogen lamp. The illumination path includes a filter, collimating lens, mirror mask, and an objective lens. The objective lens is an aspheric lens, and it is preferably positioned about 25mm from the cornea of the eye. The imaging path includes an objective lens, mask, and a relay lens. Preferably, the objective lens, the mask are common to both the illumination path, and the imaging path. The fundus camera also includes a receiving member (122) which is a CCD camera that converts the received light into digital image. The digital images can be simultaneously viewed and stored. The fundus camera is focused on the pupil to improve the depth of field, and the mask is positioned to block spurious light reflections which decrease the clarity of the digital images.