Aperture plate and related system and method

Details Aperture plate and related system and method Aperture plate and related system and method

2007-10-02

2007-10-02

Robinson, Mark A. (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S613000, C359S636000

Reexamination Certificate

active

11003179

ABSTRACT:
An aperture plate includes an opening and a surface adjacent to the opening. The opening passes electromagnetic energy such as light to a reflector that is aligned with the opening and that directs the electromagnetic energy to a location. The surface reflects incident electromagnetic energy away from the location in a direction that is outside of the range of directions. Such an aperture plate insures that electromagnetic energy, e.g., light, strikes only the desired portions of the reflector, and that peripheral light that is outside of the aperture opening is reflected away from the location, e.g., display screen, toward which the reflector directs the electromagnetic energy. Furthermore, because such an aperture plate is mounted near the reflector, the alignment tolerances are typically less stringent than for an aperture plate mounted near the energy source.

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