Jian, I think he takes issue mainly with you mentioning some max scanning angle without mentioning there will be x amount of overspill, not you naming the scanners like this.
I don't have an issue with you naming these DT50 myself. I didn't have an issue with Xbox naming one of its consoles 360 to look bigger than "Playstation 3" and I don't have much issue with literally everyone making memory storages having less than 2,4,8,16,32,etc. GB of actual usable memory... or Pangolin naming their scanner "506", for that matter. Biggest number of them, good marketing, I take no issue. Yes, I know there's a reason behind that number, Microsoft said the same about "Xbox 360", spare us the explanation.