Optics: measuring and testing – Dimension
Reexamination Certificate
2009-03-07
2010-10-26
Nguyen, Sang (Department: 2886)
Optics: measuring and testing
Dimension
C356S005010, C033S277000, C033S0010DD
Reexamination Certificate
active
07821653
ABSTRACT:
A portable electronic device for measuring a distance D1between two points E1, E2, includes a visible and rotatable light emitter, an angle computing unit, a distance computing unit and an output unit. The light emitter generates a rotatable light beam capable of rotating from pointing in an initial direction to project to the point E1. The initial direction is substantially perpendicular to a line defined by the points E1, E2. A distance H1between the light emitter and the line, and a distance S1from the point E2to the point of intersection of the line defined by the first and second points E1, E2with the initial direction, are known. The angle computing unit computes an angle defined by the visible light beam projecting to the point E1and the initial direction according to the rotatable light beam. The distance computing unit computes the distance D1based on the angle, the distance H1and the distance S1.
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Hon Hai Precision Co., Ltd.
Hong Fu Jin Precision Industry ( ShenZhen) Co., Ltd.
Nguyen Sang
Niranjan Frank R.
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