Abstract: An electronic device may have a housing in which components are mounted that produce heat. The heat producing components may be light-emitting diodes mounted on a flexible printed circuit in a display backlight, may be integrated circuits, or may be other devices that generate heat during operation. A heat spreading layer such as a layer of graphite may be attached to the backlight unit or other structures in the electronic device using adhesive. The adhesive may be patterned to form an unbonded area between at least some of the backlight unit or other structures to which the heat spreading layer is being attached and the heat spreading layer. The heat spreading layer may be mounted adjacent to a housing structure such as a metal midplate member that is attached to housing walls in the housing.

Abstract: An electronic device may have a housing in which components are mounted that produce heat. The heat producing components may be light-emitting diodes mounted on a flexible printed circuit in a display backlight, may be integrated circuits, or may be other devices that generate heat during operation. A heat spreading layer such as a layer of graphite may be attached to the backlight unit or other structures in the electronic device using adhesive. The adhesive may be patterned to form an unbonded area between at least some of the backlight unit or other structures to which the heat spreading layer is being attached and the heat spreading layer. The heat spreading layer may be mounted adjacent to a housing structure such as a metal midplate member that is attached to housing walls in the housing.

Abstract: Spatially-separated heterodyne interferometer architecture is combined with monolithic glass construction techniques to provide a monolithic, spatially-separated, common-path interferometer. The monolithic interferometer includes multiple optical components bonded together into a monolithic structure. The bonded components provide both optics and structure for the interferometer, thereby producing a small, compact, and light-weight interferometry system. Beam splitters and combiners are provided on the interfaces between the optical components to direct and combine signal measurement, signal reference and local oscillator beams used in the interferometry system. The spatially-separated architecture reduces cyclic error values below those of polarization-separated interferometers. In addition, the monolithic architecture of the interferometer minimizes the impact of mechanical, thermal, and optical variations within the system.

Abstract: A tilting kinematic mount having optics which may be precisely positioned so as to direct light or other energy to a number of measuring devices. Optic carrying tilting plates, interleaved with stationary plates are moved by linear actuators. An arrangement of balls and grooves establishes positioning of the tilting plates in a kinematic mount relative to the stationary plates, thus achieving the precise rearrangement of optical elements relative to a central axis and the redirection of the energy beam onto the sensing devices.

Abstract: A Rotating Kinematic Mount having a rotating mirror or other optics precisely positioned so as to direct light or other energy to a number of measuring devices. The mount uses a rotating turret containing one or more tilted optical elements. The turret is raised from a base, rotated by stepper motors and then lowered into a new alignment, An arrangement of balls and grooves establishes positioning of the turret in a kinematic mount, thus achieving the precise rearrangement of optical elements relative to a central axis and the redirection of the energy beam onto the sensing devices.