Patent ID: 9703090
Date: 2017-07-11
CPC Classifications: B23K,F01D,G01N,G02B

Claim:
1. A boroscope having a first end and a second end, the first end of the boroscope has an optical fibre, a light source, a lens and a transmissive diffractive optical element, the optical fibre extends from the first end of the boroscope to the second end of the boroscope, a laser optical fibre extends from the lens at the first end of the boroscope to the second end of the boroscope, a laser source is arranged to direct a laser beam into the laser optical fibre, the lens is provided between the laser optical fibre and the transmissive diffractive optical element, the transmissive diffractive optical element is arranged to produce a laser beam with a predetermined shape and a focal length probe extending from the first end of the boroscope, wherein the transmissive diffractive optical element is arranged to produce a laser beam with the outline of the shape defined by a straight line and an arcuate line.