Hawthorne-based OSI Systems Inc. said Thursday that its optoelectronics and manufacturing division has received a $10.5 million OEM contract from a Fortune 500 medical equipment company.

OSI Optoelectronics will provide an optical scanning component for use in advanced medical computed tomography machines, commonly known as CT scanners. Shipment has already begun and is expected to be completed in fiscal 2007. The name of the customer was not disclosed.