Basic Principle
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| This is a new noncontact measurement method which combines the confocal principle and the tuning fork, unlike the laser triangulation measurement which is commonly used for laser displacement meters. |
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The laser beam irradiated from a light source passes through the object lens, which moves rapidly up and down, based on the movement of the tuning fork, and focuses on the object. |
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The reflected light from the target object passes through a half mirror and a pin hole, and reaches the light-receiving element. |
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According to the confocal principle, when the laser beam focuses on the object, the reflected light is then concentrated at the pinhole, through which it enters the light-receiving element. |
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By measuring the position of the tuning fork at that time with the sensor, the distance to the object can be accurately measured. |
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