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Polarising helioscopic eyepiece.

Optical instrument, polarising helioscopic eyepiece, brass / glass, used at Sydney Observatory, made by Hugo Schroeder, Hamburg, Germany, 1874. A polarising helioscopic eyepiece consisting of a central brass disc with a hole in its surface. Set into the surface of the disc surrounding the hole is a rotatable brass scale. Fixed to the rotating scale is a rectangular metal structure set at an oblique angle. Inside the metal structure there is a rectangular glass lens which is held at an angle by two metal brackets. There is an additional pair of brackets for another lens however no lens is present. There is a hole in the top of the oblique metal structure into which a brass screw fitting has been attached. On the underside of the central brass disc is a metal bracket containing two additional rectangular glass lenses. The lenses are set at an angle and held in place by metal brackets.

View object on the British Library on Flickr Commons site (opens in new window).

(Accession num: H10380)

So far people have added content in 4 turns about this object.


helioscope, eye, polar, polarising, Hugo Schroeder, telescope, eyepiece, polarising, surface of the sun, reflectors, Venus, H.C. Russell, optical unconscious, lens, golden color, circle, scope, metal

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