1.   ...the focal plane of the telescope.

2.   Another concern centers on focal plane arrays, widely used sensors that help guide missiles, tanks and other military systems.

3.   Besides missiles, regulators have been concerned with reduced competition for systems used to guide missiles, in this case focal plane arrays and electro-optical systems.

4.   Dropping the unit into the camera places the sensor in the focal plane of the lens, where the film would normally be.

5.   Hughes is the leading manufacturer of focal plane arrays, and Raytheon is the second-largest.

6.   Light from the sources will fall on the holes when the telescope is pointed in a particular direction and the proper disk is fitted into the focal plane.

7.   The other two issues are ground electro-optical systems and focal plane arrays, the person familiar with the review said.

8.   Their unwieldy large-format cameras keep the entire building in the same focal plane, sometimes by moving the lens while the camera body stays in place.