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Narinder Singh Kapany
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Science & innovation · Punjab

Bending light through glass

Narinder Singh Kapany showed that a bundle of thin glass fibres could carry a picture around a bend. That early work is one chapter in the story of today's fibre-optic world.

Narinder Singh Kapanyनरिंदर सिंह कपानी
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Narinder Singh Kapany. Photo: archival image; credit being confirmed

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Born
31 October 1926, Moga, Punjab
Died
2020
Field
Optics, fibre optics
Institutions
Imperial College London; University of California Santa Cruz; optics industry
Honours
Padma Vibhushan 2021 (posthumous)
1926born in Moga
2021Padma Vibhushan, posthumously

Moga to London

Narinder Singh Kapany was born on 31 October 1926 in Moga, Punjab. After studying at Agra University he went to Imperial College London for optics research.

Moving from India to the UK, and later to the USA, took him to the centre of an emerging field.

Pictures through glass

At Imperial College, with Harold Hopkins, he did pioneering experiments on transmitting images through flexible bundles of glass fibres. Light that enters a thin glass fibre keeps reflecting inside it, so it can follow the fibre around a bend.

In the 1950s he popularised the term “fibre optics” and played a leading role in the early conceptual and experimental development of optical-fibre imaging and communication science. Coherent fibre bundles and optical image transmission are his major contributions.

Research into business, and beyond

He later built an academic and entrepreneurial career in the USA, set up optical-technology companies, and was active in Sikh art and philanthropy. Turning research into enterprise was the second major transition of his life.

He died in 2020, and in 2021 he was awarded the Padma Vibhushan posthumously. New fields are often built by many contributors, and history’s credit should be nuanced.

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