Patent ID: 8093540
Filing Date: 2012-01-10
Classification: B23K,G02B

Abstract:
1. A detecting module, adapted to detect a focus position of a focused light beam projected to a surface of an object to be detected, the detecting module comprising: an reflection device with an ellipse curved-surface, the reflection device having a beam gate, wherein the focused light beam is projected to the surface of the object to be detected through the beam gate to generate a reflected light beam and a scattered light beam, wherein the reflection device has a first focus and a second focus, wherein the first focus is coincident to a focus of the focused light beam, the first focus and the second focus are two conjugate foci of the ellipse curved-surface of the reflection, device; and a light detector, located at the second focus, used for detecting the reflected light beam and the scattered light beam reflected by the reflection device to generate a detecting result, and the focus position of the focused light beam being adjusted according to the detecting result, so that the focus position falls on the surface of the object to be detected.