| 摘要 |
<p>PURPOSE:To improve a focus detecting function and a spot light measuring function by guiding two-dimensional images of an object to both sides of line sensors and arranging a sensor for spot light measurement in the irradiation area of the two-dimensional image so that the center of gravity of light measurement is almost on the line sensors. CONSTITUTION:Line sensors SAA and SAB, and SAC and SAD for AF which measure distance longitudinally and laterally are arranged on a sensor 13a and two sensors SAE and SAF for AF are arranged adjacently to the lines sensors SAA and SAB; and two-dimensional images 32a-32d are projected thereupon through a two-dimensional lens. The two-dimensional images 32a and 32b are object images formed by luminous flux passed through areas 31a and 31b on the pupil of the projection lens 3 and the two-dimensional images 32c and 32d are object images formed by luminous flux passing through areas 31c and 31d. Consequently, an optical path is used in common to an AF system, so spot light measurement is possible without splitting the optical path by a half-mirror, etc., and the focus detecting function and spot light measuring function are displayed to their maximums.</p> |
