US 11,867,749 B2
Vision system for an automated test system
Jianfa Pei, North Reading, MA (US); Adnan Khalid, North Reading, MA (US); Philip Luke Campbell, North Reading, MA (US); Christopher James Bruno, North Reading, MA (US); and Christopher Croft Jones, North Reading, MA (US)
Assigned to TERADYNE, INC., North Reading, MA (US)
Filed by Teradyne, Inc., North Reading, MA (US)
Filed on Oct. 22, 2020, as Appl. No. 17/077,827.
Prior Publication US 2022/0128622 A1, Apr. 28, 2022
Int. Cl. G01R 31/28 (2006.01); G01R 31/3183 (2006.01); G01R 31/319 (2006.01)
CPC G01R 31/2863 (2013.01) [G01R 31/31905 (2013.01); G01R 31/318307 (2013.01)] 36 Claims
OG exemplary drawing
 
1. A test system comprising:
test sites comprising sockets for testing devices under test (DUTs);
pickers for picking DUTs from the sockets or placing the DUTs in the sockets;
a gantry on which the pickers are mounted, the gantry being configured to move the pickers relative to the test sites to position the pickers for picking the DUTs from the sockets or placing the DUTs into the sockets;
a camera configured for positioning over a socket and controlled using servo control to capture an image of the socket or of a DUT in the socket; and
a control system to implement the servo control of the camera and to use the image to control placing the DUT in the socket or picking the DUT from the socket;
wherein the camera is a three-dimensional (3D) camera to capture 3D image data representing at least the socket.