摘要:
A method and an apparatus of a powder bed fusion additive manufacturing system that enables a quick change in the optical beam delivery size and intensity across locations of a print surface for different powdered materials while ensuring high availability of the system. A dynamic optical assembly containing a set of lens assemblies of different magnification ratios and a mechanical assembly may change the magnification ratios as needed. The dynamic optical assembly may include a transitional and rotational position control of the optics to minimize variations of the optical beam sizes across the print surface.
摘要:
A method and an apparatus of a powder bed fusion additive manufacturing system that enables a quick change in the optical beam delivery size and intensity across locations of a print surface for different powdered materials while ensuring high availability of the system. A dynamic optical assembly containing a set of lens assemblies of different magnification ratios and a mechanical assembly may change the magnification ratios as needed. The dynamic optical assembly may include a transitional and rotational position control of the optics to minimize variations of the optical beam sizes across the print surface.
摘要:
Dual-direction collimation and a dual-direction optical collimator provide dual-direction collimated light at a non-zero propagation angle. The dual-direction collimator includes a vertical collimator configured to collimate light in a vertical direction and a horizontal collimator configured to collimate the vertically collimated light in a horizontal direction. The horizontal collimator is located at an output of the vertical collimator. A three-dimensional (3D) display includes the dual-direction collimator, a plate light guide and an array of multibeam diffraction gratings at a surface of the plate light guide to couple out the dual-direction collimated light guided in the plate light guide as a plurality of light beams corresponding to different 3D view of the 3D electronic display.
摘要:
A system for focusing of a high energy laser at an extended distance. Particularly, an optical system that includes a first lens element that has a first surface and a second surface, where the first surface is concave and the second surface is convex, a second lens element that has a first surface and a second surface, where the first surface is flat and the second surface is concave, a third lens element that has a first surface and a second surface, where the first surface is flat and the second surface is convex and where the distance between the second lens element and the third lens element is larger than the distance between the first lens element and the second lens element.
摘要:
The invention relates to a device (10) for the optical measurement of a distance from a reflecting or scattering target object, having a distance measurement device (11) and an adjusting device (12) arranged outside of the distance measurement device (11), having a second transmission optical unit (17.1-17.6) adjustable between a first and second position for forming the laser light into a beam, wherein in the first position, the second transmission optical unit (17.1-17.6) is arranged in the laser beam, and in the second position, it is arranged outside of the laser beam.