Patent ID: 8885257

Claim:
A method of producing a plurality of optical imaging apparatus comprising: providing an optical wafer comprising a first optical element at a first die location and a second optical element at a second die location on the optical wafer; coupling a spacer wafer to the optical wafer to provide a first optical die and a second optical die; determining a first focal point of the first optical die and a second focal point of the second optical die; singulating the first optical die and the second optical die; providing a second wafer comprising a first focus compensation standoff and a second focus compensation standoff; adjusting the height of the first focus compensation standoff to position a first electro-optical element at or near the first focal point when the first optical die is positioned over the first focus compensation standoff; and adjusting the height of the second focus compensation standoff to provide a second electro-optical element at or near the second focal point when the second optical die is positioned over the second focus compensation standoff, wherein the first focus compensation standoff and the second focus compensation standoff are adjusted to different heights.