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The Reflector Syndicate, Grosvenor Mansions, Victoria Street, London, S.W.

The exhibit consists of a collection of reflectors used chiefly for searchlight and other projection work. These are optically worked of either metal or glass, the special new feature being the deposition of gold on glass to form a parabolic gold mirror.

Light reflected from a gold coloured reflector is found to illuminate a distant object more clearly and to be more effective in thick and foggy weather. The probable reason for this is that the beam from a gold reflector contains a very high percentage of red and yellow rays which are least absorbed by the atmosphere. Another advantage of a gold mirror is the absence of white halos, and consequent deep shadows of objects close to the source of light. In other words, there is a softer and more even illumination of fore and back ground, and it is easier to distinguish colours such as a grey torpedo boat on a grey sea with a grey sky. Lastly, the gold is unaffected by chemical or climatic conditions.

A 24 in. diameter combination mirror is also shown, having gold and silver radial bands. The object is to combine the penetrative effect of the gold mirror with the dazzling effect of the white light.

A 24 in. metallic mirror is shown ; this has been electro-lytically deposited on a silvered glass former. A structureless metallic mirror is thus obtained. These mirrors are afterwards coated with a deposit of palladium, which is very hard and does not tarnish. This particular mirror has been pierced with rifle shots.

A copper parabolic locomotive headlight for an American railroad is shown. This has also been electrolytically deposited.

Various samples of translucent and non-transparent glass are shown. The gold is chemically deposited on the glass, and viewed translucently has a delicate greenish tint, but the deposit is so fine as to give a gold mirror effect by reflected light.

Surface reflecting gold mirrors are also shown. The gold being deposited in a hard condition to permit of reasonable handling without damage to the surface.

M2

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Le texte affiché peut comporter un certain nombre d'erreurs. En effet, le mode texte de ce document a été généré de façon automatique par un programme de reconnaissance optique de caractères (OCR). Le taux de reconnaissance estimé pour cette page est de 99,90 %.

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