| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that differences between individuals depending on skills of workers is produced and accuracy is lowered because the best conjugate length of an optical fiber lens is found by visually checking a monitor screen to search the position for obtaining the best focal point up to now. SOLUTION: This measuring device is composed of a light source 2 having a moving means; a lens holding device 4 for holding the optical fiber lens 10 and having a moving means; a microscope image pickup device 3; an image processing device 5; and a driving device 6, and the best conjugate length is automatically obtained by repeating detection of a lens optimum position by the highest value of brightness according to the movement of the lens holding device 4 with the image processing device 5 and the driving device 6 and detection of the minimum diameter of the image according to the movement of the light source device 2 with the image processing device 5 and the driving device 6, and thereby, the measurement of the conjugate length is simplified, and accuracy is enhanced.
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