Shadow probe

Details Shadow probe Shadow probe

Category

G - Physics

Subcategory

01

Subsubcategory

B

IPC codes

G01B 11/02 (2006.01) A61B 1/04 (2006.01) A61B 5/107 (2006.01) G02B 23/24 (2006.01)

Type

Patent

Patent number

CA 2166824

Description

A device for measuring the size of targets viewed with a borescope having a housing with a longitudinal axis and a distal viewing end with an optically transparent window set therein, a source of target illumination which projects a cone of illumination so that the axis of the cone of illumination is at an angle of less than 90° with the housing axis, a contrasting shadow gener- ated in association with the illumination source so as to project the contrasting shadow on the target, an image detector disposed adjacent to the source of illumination, directed so as to detect the image of the target and the con- trasting shadow, a display for viewing the target and shadow as detected by the image detector, and a measuring device for measuring the parameters of the contrasting images. on the display so that the actual size of the target canbe determined.

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