Patent ID: 6922232
Filing Date: 2005-07-26
Classification: G01J

Abstract:
1. A test system for measuring a far-field pattern generated by a first light-emitting device, the test system comprising: an objective lens and a first relay lens aligned along a first optical axis and arranged to focus light emitted from the first light-emitting device onto a first image plane; a first beamsplitter located along a first optical axis between the first relay lens and the first image plane and arranged such that a portion of the focused light is reflected along a second optical axis; a second relay lens positioned in the second optical axis, the second relay lens being formed and positioned such that the reflected portion of the focused light is collimated and directed onto a second image plane, first means for calculating a position of the first light-emitting device relative to the objective lens based from the focused light emitted by the first light-emitting device, and second means for measuring the far-field pattern from the collimated light emitted by the first light-emitting device.