Optical device, and method of measuring the dimension of...

Details Optical device, and method of measuring the dimension of... Optical device, and method of measuring the dimension of...

2006-06-26

2010-02-23

Tarcza, Thomas H (Department: 3662)

Optics: measuring and testing

Range or remote distance finding

With photodetection

C356S003100, C356S003150, C356S004100, C356S005100, C356S005150

Reexamination Certificate

active

07667823

ABSTRACT:
A device and a method for measuring the sizes of a remote object, for example, concrete crack, without using a high-place work vehicle or a ladder. An optical apparatus (e.g. a measuring device (10) ) used for this purpose is provided with a telescope (16) having a reticule plate (46) . The reticule plate (46) is provided with a plurality of reference scales (52) used for comparison with the size (W) of the image (C′) of an object (C) projected onto the reticule plate (46). The size of the object can be measured using the size of the object image measured with the reference scales (52) and a distance (a distance from a reference point P0a to the object) measured with a distance measuring unit (20) of the optical apparatus.

REFERENCES:
patent: 5892617 (1999-04-01), Wallace
patent: 7164467 (2007-01-01), Heinke et al.
patent: 2008/0098640 (2008-05-01), Sammut et al.
patent: 08-086601 (1996-04-01), None
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patent: 9-021627 (1997-01-01), None
patent: 3037959 (1997-06-01), None
patent: 2002-013295 (2002-01-01), None
patent: 2002013295 (2002-01-01), None
Form PCT/ISA/210 (International Search Report) dated Sep. 12, 2006.

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