| 摘要 |
PROBLEM TO BE SOLVED: To provide an autofocusing device capable of being focused on a substance to be measured made of all sorts of material without being restricted by the material of the substance to be measured. SOLUTION: This device is provided with an objective lens 14 condensing light on the measured surface of the substance to be measured, a CCD camera 24 capable of observing the image of the substance to be measured based on light emitted from the lens 14, and an actuator 15 displacing the lens 14 in its optical axis direction based on the contrast of the image of the substance to be measured obtained by the camera 24. In such a case, a specified pattern is projected to the measured surface of the substance to be measured by providing a pattern projection means 20 including an illuminator 25, a projection lens 21 and a liquid crystal board 22 on which the specified pattern is displayed. |
