A look at the manufacture of optical lenses, and their many uses throughout the different industries; from microscopes to spectacles to full use in the war effort.

Release year - 1945
Director - Robert Lapresle
Production company - Merton Park Studios
Screenplay - Robert Lapresle
Cinematographer - Cyril Knowles
Composer - Norman Fulton
Narration - Ronnie Waldman
Editor - Cath Miller
Sound recording - Edgar Law
Music Conducted by - Muir Mathieson
Running time (minutes) - 16 mins 04 secs

Optical glass is ground and polished to an incredible accuracy. This film shows how the sand is purified and bilted and how the pieces of glass are smoothed and polished in lenses for optical metrometers, survey instruments, microscopes, telescopes and camera lenses.

(Courtesy: British Council Film Department)

Did you know?
The highland sand mine featured is the Lochaline silica sand mine, which opened in 1940. Although closed down in 2008 the mine was re-opened in April 2012 and to this day provides high quality sand for glass making in the UK. Alongside Queen Cotton and Power Lines, this is the third film in the British Council Film Collection that describes the workings of the technical machinery in industrial production as having a "symphony of sound and colour".

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