Subjective eye refracting power measurement apparatus

摘要

There is provided a subjective eye refracting power measurement apparatus which measures a refracting power of a subject eye. The apparatus includes a projection optical system which projects a visual target light flux toward the subject eye to form a visual target on a fundus of the subject eye; a correction optical system which changes a refracting power thereof; a relay optical system which relays a light flux passing through the correction optical system and to form an image of the correction optical system in front of the subject eye; a deviation detector which detects a positional deviation of the image of the correction optical system with respect to the subject eye; and a correction unit which optically corrects a formation position of the image based on a detection result by the deviation detector such that the image is formed in front of the subject eye.

主权项

1. A subjective eye refracting power measurement apparatus configured to measure a refracting power of a subject eye, the apparatus comprising:
a projection optical system configured to project a visual target light flux toward the subject eye to form an eye-examination visual target on a fundus of the subject eye; a correction optical system disposed in an optical path of the projection optical system and configured to change a refracting power thereof; a relay optical system comprising a concave mirror, the relay optical system configured to relay a light flux passing through the correction optical system and to form an image of the correction optical system in front of the subject eye; a deviation detector configured to detect a positional deviation of the image of the correction optical system with respect to the subject eye; and a correction unit configured to optically correct a formation position of the image of the correction optical system based on a detection result by the deviation detector such that the image of the correction optical system is formed in front of the subject eye.