A variant of Resolve Optics’ Model 207 miniature motorised zoom lens enabled the manufacturer of remotely operated vehicles to improve the deep sea welding capability of its system.
Traditionally underwater welding repair, to secure the integrity of pipes and other marine structures, has been carried out by diving welders. The task is often dangerous and poor visibility means that welding joint quality can vary.
Remotely operated vehicles (ROVs) have become increasingly popular for underwater welding projects because they have no depth restrictions, no time limitations and are able to enter dangerous and small spaces or contaminated water.
With the help of optical design from Resolve Optics, it is possible to monitor operation with high quality video.
Resolve Optics were asked to assist with an application in which the ROV required a compact motorised zoom lens with a wide angle for easy location of the area that required welding.
The close focus feature of the Model 207 allowed the lens to be placed closer to the welding head and incorporation of an ND spot to provide a wide aperture range of f/2.8 - f /160 enabled the operator to monitor the weld without the camera flaring out.
The Model 207 Motorised Miniature Zoom Lens from Resolve Optics can focus on an object at infinity right down to an object positioned just 35 millimetres in front of the lens.
Designed for use with miniature CCTV cameras - the Model 207 (50 x 34 x 31 mm) is claimed to be the smallest stand-alone zoom lens commercially available.
Using the close focus capability of the Model 207 f/2.8 zoom lens opens the door to a range of macro applications as it allows an object to be shown in detail at a much enlarged size on a TV monitor.