Illumination – Light source and modifier – Laser type
Reexamination Certificate
1999-01-22
2001-07-03
O'Shea, Sandra (Department: 2875)
Illumination
Light source and modifier
Laser type
C362S271000, C362S272000, C362S286000, C362S276000, C362S551000, C362S419000, C362S428000
Reexamination Certificate
active
06254253
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a laser device for projecting signs, letters, numbers and other graphical representations onto a presentation wall.
BACKGROUND OF THE INVENTION
Various laser deflection devices are currently known. These deflection devices tend to be expensive, large, and very voluminous. For many applications, however, deflection devices as small as possible are required. One application of such a small deflection device is a hand-held laser pointer being able not only to direct a simple point of light onto a board, but also to display any chosen graphical representation. Thus, a speaker could project a company logo or any other sign onto the board during a presentation. The problem is how to design the smallest possible deflection device which, in addition to being able to project both a graphic and a point, is battery-operated and uses the lowest possible amount of energy.
SUMMARY OF THE INVENTION
Generally, the present invention relates to miniaturized light deflector systems. In particular, the invention is related to a deflector system where the light source itself is deflected. In one embodiment, the invention is a laser projection device that has a first piezo element, attached at a first end to a base and a second end movable in a first direction. A second piezo element is attached at a first end to the first piezo element and has a second end movable in a second direction. A light source is attached to the second piezo element.
In another embodiment, the invention is a device for deviating a laser beam that has first and second piezo elements attached at respective first ends to a base at independent first and second fixed points. A focusing element is attached to a movable, second end of the first piezo element, and a light source is to a movable, second end of the second piezo element, and oriented to direct a light beam towards the focusing element. Movement of one or more of the second ends of the piezo elements results in projection of the light beam within a preselected projection angular volume.
The above summary of the present invention is not intended to describe each illustrated embodiment or any implementation of the invention. The figures and detailed description that follow more particularly exemplify these embodiments.
REFERENCES:
patent: 5576901 (1996-11-01), Hanchett
Daum Wolfgang
Hingst Wieland
DelGizzi Ronald E.
O'Shea Sandra
Standley & Gilcrest LLP
Viewpoint Technology, Inc.
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