| 摘要 |
A non-contact measuring device is provided which allows measurements to be made in confined spaces. The device 2 comprises: a lens 8 having a field of view 12; a laser source 4 operable to produce a laser beam 14 for illuminating a target 16 within the field of view 12, the laser source 4 being configured such that the laser beam 14 intersects the field of view between the lens 8 and the target 16; and an optical relay 10 coupled to the lens 8. In use, the lens 8 and at least a portion of the optical relay 10 are received within a cavity through an aperture and wherein the lens 8 produces an image of the target 16 within the cavity which is transmitted by the optical relay 10 from the lens 8 at one end of the optical relay, out of the cavity and to the other end of the optical relay 10 for analysis. The position of the laser beam 14 in the image corresponds to the distance / range x of the target 16 from the lens 8. The optical relay 10 and lens 8 may form part of a borescope. The device may further comprise a camera which is coupled to the optical relay 10 and captures the image from the lens 8 via the optical relay 10.
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