Abstract: A micro light emitting device includes an epitaxial structure, a conductive layer, and a first insulating layer. The epitaxial structure has a first surface and a second surface opposite to the first surface, and includes a first semiconductor layer, an active layer and a second semiconductor layer that are arranged in such order in a direction from the first surface to the second surface. The conductive layer is formed on a surface of the first semiconductor layer away from the active layer. The first insulating layer is formed on the surface of the first semiconductor layer away from the active layer, and exposes at least a part of the conductive layer.

Abstract: A light-emitting device includes a semiconductor epitaxial structure including a first semiconductor layer, an active layer, and a second semiconductor layer, and having holes; a first insulation layer disposed on the semiconductor epitaxial structure and having first and second grooves; a first pad electrically connected to the first semiconductor layer through the first grooves; and a second pad electrically connected to the second semiconductor layer through the second grooves. A projection of the first pad does not overlap projections of the holes. A projection of the second pad does not overlap the projections of the holes. The first pad includes a first pad connection portion and first pad extension portions; the second pad includes a second pad connection portion and second pad extension portions. Projections of the second grooves fall between projections of the first and second pad extension portions. Two other aspects of the light-emitting device are also provided.

Abstract: Device and method for scanning an object outline image are provided. The scanning device includes a light source, an optical sensor and a processor. The scanning method includes: providing a polarized projection light beam; projecting the polarized projection light beam to an object, and correspondingly reflecting a polarized reflection light beam by the object according to the polarized projection light beam; capturing an image of the polarized reflection light beam; calculating polarization state of target according to the polarized projection light beam and the polarized reflection light beam, the polarization state of target having a plane angle from normal projection and a corresponding point position; and restoring an outline image of the object according to the polarization state of target.

Abstract: Device and method for scanning an object outline image are provided. The scanning device includes a light source, an optical sensor and a processor. The scanning method includes: providing a polarized projection light beam; projecting the polarized projection light beam to an object, and correspondingly reflecting a polarized reflection light beam by the object according to the polarized projection light beam; capturing an image of the polarized reflection light beam; calculating polarization state of target according to the polarized projection light beam and the polarized reflection light beam, the polarization state of target having a plane angle from normal projection and a corresponding point position; and restoring an outline image of the object according to the polarization state of target.

Abstract: A laser-assisted machining device includes a spindle, a beam splitting module and a cutting tool. The spindle has a chamber, and multiple exit holes. The beam splitting module is disposed in the spindle and includes a beam splitter for splitting a main laser beam into a plurality of secondary laser beams that are directed into the chamber, and an outer reflecting unit mounted in the chamber for reflecting the secondary laser beams out of the spindle through the exit holes. The cutting tool is fixedly mounted on the spindle, for machining a workpiece, and includes multiple cutting teeth. The secondary laser beams maintain constant irradiation on multiple areas of the workpiece during rotation of the spindle.

Abstract: A laser-assisted machining device includes a spindle, a beam splitting module and a cutting tool. The spindle has a chamber, and multiple exit holes. The beam splitting module is disposed in the spindle and includes a beam splitter for splitting a main laser beam into a plurality of secondary laser beams that are directed into the chamber, and an outer reflecting unit mounted in the chamber for reflecting the secondary laser beams out of the spindle through the exit holes. The cutting tool is fixedly mounted on the spindle, for machining a workpiece, and includes multiple cutting teeth. The secondary laser beams maintain constant irradiation on multiple areas of the workpiece during rotation of the spindle.

Abstract: A method of constructing tooth images utilizes a probe to take images of teeth at one place using a first light ray of wavelength less than or equal to 460 nm and a second light ray of wavelength greater than or equal to 600 nm, thereby generating a first image and a second image. After receiving the first image and the second image, an image processing unit superimposes the first image and the second image to produce a composite tooth image. Using the light of wavelength less than or equal to 460 nm has the advantage of reducing reflection disturbance from saliva, thereby increasing the precision in tooth images.

Abstract: A light emitting key structure is provided. The key structure includes a base, a reflective sheet, a circuit board, an elastic member, a linkage mechanism, and a key cap sequentially disposed one on another in order. The reflective sheet is disposed on the base. The circuit board is made of a light guide material. At least one light source is bonded to a lateral side of the circuit board. The circuit board, together with the light source bonded to the lateral side thereof is disposed on the reflective sheet. The elastic member is directly coupled to the circuit board. The key cap is featured with a light transmission characteristic. Therefore, in operation, the light emitted from the light source can be directly guided into the circuit board, and then outputted from the light transmissive key cap, thus achieving the light emitting effect.