Boroscope and a method of processing a component within an assembled apparatus using a boroscope

A method of processing a component within an assembled apparatus, the apparatus comprising a casing enclosing the component, the casing having at least one aperture extending there-through, the method comprising:—

• a) inserting a boroscope through the aperture, the 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 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 baroscope.
• b) viewing the assembled apparatus within the casing using the optical fibre,
• c) viewing the assembled apparatus within the casing using the optical fibre while moving the working head of the boroscope to a predetermined position on the component,
• d) contacting the component with the focal length probe and maintaining the focal length probe in contact with the component,
• e) supplying a laser beam through the laser optical fibre to the lens,
• f) directing a laser beam with a predetermined shape onto the surface of the component to process a region of the surface of the component with the predetermined shape, and
• g) viewing the component with the optical fibre to monitor the processing of the component.