His Wave Theory of Aberrations, (published by Oxford University Press 1950), is central to all modern optical design and provides the mathematical analysis which enables the use of computers to create the wealth of high quality lenses available today.

Hopkins was able to show, through a complete mathematical analysis of the system, that with a carefully calculated geometry, it was possible to use a single piece of transparent moulded-plastic instead.

Australian actor Harold Hopkins has died in a Sydney hospice from the asbestos-related cancer mesothelioma. Harold Horace Hopkins FRS[1] (6 December 1918 – 22 October 1994)[2] was a British physicist. I am so sorry for your loss, may God grant the necessary strength and comfort during these difficult days ahead. The surgical requirement of passing surgical tools as well as the illumination system actually within the endoscope's tube – which itself is limited in dimensions by the human body – left very little room for the imaging optics.

It was all the more remarkable for being produced pre-computer, the ray-tracing calculations being performed on large desk top electro-mechanical machines such as the Marchant Calculator. Harold Hopkins, who appeared in several important Australian movies including Gallipoli (right), The Year My Voice Broke, Don's Party, and The Club, died yesterday, Dec. 10, at Neringah Private Hospital in Wahroonga, north Sydney.According to reports, his death was caused by the asbestos-related cancer mesothelioma.

Please allow 24 hours for your entry to be reviewed for appropriate content. There are, however, physical limits to the image quality of a fibroscope. He was awarded the 1990 Lister Medal for his contributions to surgical science.

Our condolences to the Hopkins family and friends. I will never forget the times we had plying in the church basketball league with Harold as our coach.

Plant a tree to honor the memory of your loved one. However, the Headmaster, recognising his exceptional gift for mathematics, directed him into science. Due to his own genius and the good fortune of having the support of both his family and teachers, he obtained one of only two scholarships, in the whole of Leicestershire, enabling him to attend The Gateway Grammar School. Other innovations included the use of additional fibres to channel light to the objective end from a powerful external source (typically a xenon arc lamp) thereby achieving the high level of full spectrum illumination needed for detailed viewing and good quality colour photography. Whilst zoom lenses can never out-perform fixed focal lengths, the differences are no longer significant in most applications. With the appropriate curvature and coatings to the rod ends and optimal choices of glass-types, all calculated and specified by Hopkins, the image quality was transformed – light levels were increased by as much as eightyfold with no heat; resolution of fine detail was finally achieved; colours were now true; and diameters as small as a few millimetres were possible.

They were also incredibly hard to manufacture and assemble – and optically nearly useless. [6] Thus began a long and productive partnership between Hopkins and Storz. Coming from a poor and under-privileged background, he understood how essential equal opportunities and good education were if ordinary working class youngsters like himself were to prosper in society.

you can now have memorial trees planted in a National Forest in memory of your loved one.

The spatial frequency is the reciprocal of the period of the pattern in this image, normally measured in cycles/mm. [5] This award, for his work on endoscopes, was unusual in that normally it is made to someone working in the field of medicine. "Only when you try to teach something do you discover whether you truly understand it.". Having polished the ends, he was then able to add the optics he had designed to provide an objective and eyepiece. This content is published for the entertainment of our users only. At the same time a Dutchman, Abraham van Heel was also trying to produce coherent bundles and had been researching the idea of cladding each fibre to reduce this 'cross-talk'. This brought together under one roof, the biomedical and pharmaceutical research interests of the University.

He began a research fellowship at Imperial College London in 1947, lecturing in optics. MTF is still used by optical designers as the principal criterion of image quality, although its measurement in production is less widespread than it used to be. I grew up playing golf with Kendall and Randy so I became friends with Hoppy early in my life. (He was obviously a natural, quickly rising to the rank of 'acting unpaid lance corporal' and winning a prize for his speed at dismantling and reassembling his rifle.) To produce a useful image, the bundle would need to contain not a few hundred but tens of thousands of fibres all correctly aligned. He proposed winding a single continuous length of fibre in a figure-of-eight around a pair of drums.


If a bundle of fibres could be arranged such that the ends of the fibres were in matching locations at either end, then focusing an image on one end of the bundle would produce a 'pixel-ated' version at the further end which could be viewed via an eyepiece or captured by a camera.

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