| 摘要 |
PURPOSE:To view a good magnified image and to simplify handling, by unifying a magnifying glass having an automatic focusing function with glasses. CONSTITUTION:Glasses equipped with a magnifying glass 10 consist of a glasses main body 1 and the magnifying glass 10 connected thereto, and the magnifying glass 10 consists of a pair of magnifying glass elements 11 and a base body 12 receiving various focus control systems. A slide cylinder 19 and an eyepiece 15 are moved before and behind along an optical axis by rotating a motor 21 and the focal distance of the magnifying glass consisting of lenses 14, 15 is changed. The beam emitted from a beam emitting element 33 is reflected from an object S to be viewed, and the generated scattering beam is received by a photodetector 35 and photoelectrically converted to be sent to a distance measuring operation part 31. The distance measuring operation part 31 calculates distance up to the object S to be viewed in its distance measuring operation part and gives a necessary focus order signal in order to move the motor 21 of the magnifying glass elements 11 by a required angle. By this constitution, the magnifying glass elements 11 and the eyepiece 15 are moved before and behind so as to obtain the focal distance coinciding with the distance up to the object S to be viewed. |
