Lockheed Martin Corporation

Printware, Inc.

David J Shelander

Jeffrey M Borning

Scott M Ralston

Nathan E Stremick

John A Holst

A door for mission critical enclosures, for example, cabinets containing sensitive items, such as electronics that may be exposed to high stress environments, for example shock and vibration. The door structure described provides improved mounting and lock features that can allow easy access while maintaining rigid structural needs and integrity. A door assembly for a cabinet generally includes a door that can be fitted directly, or indirectly, to an enclosure through an adapter frame. Generally, the door has fitting structures that operate as interlocking, tight fitting key sets. The fittings provide suitable detent features. An actuatable lock mechanism respectively locks and unlocks the door. The actuatable lock mechanism includes a ramped locking bolt that can engage a ramped surface of the cabinet or adapter frame to facilitate locking and unlocking of the door.

Door with mount and lock structures for mission critical enclosures

A ruggedized display enclosure is described that houses an electronic display while withstanding severe shock and vibration, as well as environmental drip, such as for example conditions encountered in military environments. The ruggedized display enclosure has a cover structure to house the electronic display, but also allows the electronic display to be seen through the cover structure, so that the electronic display is usable when inside the enclosure. A damping material is arranged on outer areas of such an electronic display, between the electronic display and the cover structure. The damping material is arranged to allow the electronic display to be suspended with respect to the cover structure, thereby protecting the electronic display against conditions of shock and vibration.

Ruggedized display enclosure

A very stable deflection system usable with a beam of radiant energy incorporates a self-resonant scanning galvanometer located within an evacuated chamber. The chamber has a hermetic radiant energy transmissive window. An exterior laser source provides a beam of monochromatic light which is directed onto the mirror of the galvanometer. Repetitive deflection of the galvanometer mirror at a predetermined frequency results in the beam being projected onto a target so as to form a very stable and repeatable scanning line. Movement of the target provides a multi-line raster on which an image can be formed.

Self-resonant galvanometer scanning system with evacuated chamber

A light beam, typically 780 nanometer coherent light generated by a laser diode, is focused, preferably by a wide angle graded index optics lens having a numerical aperture of 0.46 and a diameter of 1.8 mm, into a diffraction limited spot, of approximate diameter 0.039 to 0.3 mils, upon an encoder wheel. The encoder wheel is typically a photoetched radial reticular grating on Mylar.RTM. plastic having lines at 0.00025' width at a radius of 1'. The focused light beam intercepts the encoder wheel at this 1' radius and is alternately transmitted and obstructed by the reticular grating of the rotating encoder wheel. The selectivity transmitted light beam is received at a detector, typically a phototransistor. Greater than 10,000 transitions per encoder wheel revolution are detectable.

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Saint Paul, MN, United States of America

David J Shelander