DLPS193 November 2020 DLP500YX
3D machine vision is a typical embedded system application for the DLP500YX DMD. In this application, two DLPC900 devices control the pattern data being imaged from a DLP500YX DMD onto the object being measured while an external camera system monitors the projected patterns as they appear on the object. An external microprocessor can then geometrically determine all 3D points of the object using the knowledge of the projected pattern provided to the object, the actual distorted pattern as captured by the camera, and the angle between the projector line-of-sight and the camera line-of-sight. This type of application diagram is shown in Figure 8-1. In this configuration, the DLPC900 controller supports a 24-bit parallel RGB video input from an external source computer or processor. The video input FPGA splits each 2048 x 1200 image frame into a left half and a right half with the left half feeding the Primary DLPC900 and the right half feeding the Secondary DLPC900. Each half consists of 1024 columns by 1200 rows plus any horizontal and vertical blanking at half the pixel clock rate. This system configuration supports still and motion video as well as sequential pattern modes. For more information, refer to the DLPC900 digital controller data sheet, found on the DLPC900 Product Folder listed under Section 11.2.1.