Abstract: An electro-optical device (1) has a lead frame (3) having a through-hole (10) acting as a locating feature for a mould pin for moulding a body (4) incorporating a lens (5). The hole (10) is also used as a reference for a placement machine placing a component (2) within 1.5 mm of it. Subsequently, after withdrawal of the mould pin a recess (35) remains, which can act as a locating feature for a waveguide termination connecting to the device. Also, the device comprises a ground plane (55) bonded to the back of the moulded body (53) or (72) incorporated in the lead frame.

Abstract: An optical assembly has a socket for receiving a fibre termination ferrule. A PIN diode is on a lead frame encapsulated in a transparent body. As a fibre ferrule is pushed into the socket the electronic output from the diode is monitored to determine optimum insertion distance.