| 摘要 |
A dual lens borescope measurement device comprising a pair of substantially identical lenses (16, 18) having the dual lens axes fixed a specified distance apart (26). A feature such as an internal engine crack (68) can be viewed through each lens simultaneously and upon selection of a single point on the crack (72), the length of the crack in a plane normal to the dual lens axes and distance of the crack from the dual borescope lenses (16, 18) can be determined. In the preferred embodiments a video viewing system (36, 38, 46) in combination with a microprocessor (42) based calculation system enables the viewer to rapidly determine crack length. Each borescope lens (16, 18) includes a computer generated "reference line" (64, 66) comprising a single reference for the dual borescope. With viewing of two or more points on the crack the full length of the crack in a non-normal plane can be accurately determined. Further, with a three-dimensional stereoscopic viewing mode as a part of the system the viewer can quickly ascertain the relative depth of objects and features in view. The system includes modes for viewer gaging and computer gaging of objects in view. |
