Test handler including gripper-type test contactor

A test handler for testing electronic devices having light-emitting elements, comprising:

• a loading position whereat the electronic devices to be tested are mounted;
• a test contact position whereat a testing device is located for optical communication with the light-emitting elements in order to conduct optical measurements thereof;
• an unloading position whereat tested electronic devices are removed after testing;
• multiple test contactors operative to hold the electronic devices and to move them to and through the loading position, test contact position and unloading position in sequence;
• wherein the test contactors each comprises:
• a device contact point including electrical conductors which are connected to electrical contacts of the electronic device when the electronic device is mounted at the device contact point;
• and
• a retaining mechanism operative to grip the electronic device at the device contact point such that the retaining mechanism does not obstruct the optical communication between the testing device and the light-emitting element at the test contact position.