| 摘要 |
PROBLEM TO BE SOLVED: To achieve an accurate adjustment of focus with a simple structure by projecting a target for focusing onto the eyegrounds and imaging a retinal reflection image to detect the blurring of a target image. SOLUTION: Reflected light from an eyground travels on an optical path 03 of an observation imaging system to form an image of a pupil P near a bored mirror 8 with an objective lens 15 and passes through a hole part of the bored mirror 8 and a turret 16 to form an image by an imaging lens 17 again near a field lens 18. Further, the light passes through a collimator lens 19 to form a retinal image onto an imaging means 21 for observation imaging with an imaging lens 20. The resulting image is displayed on a TV monitor 24 and an image signal is stored into a memory 23. Here, a general purpose camera 25 encircled by a dotted line detects the blurring of the image of the imaging means 21 by an automatically focusing function and moves a part of the imaging lens 20 in the direction of the optical path 03 to accomplish automatic focusing.
|
