Demainbray's optical model

Made:
1752
Optical model of a four lens telescope Optical model of a four lens telescope Optical model of a four lens telescope. Optical model of a four lens telescope.

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Optical model of a four lens telescope
King's College, London| Enquiries to Science Museum, London
© The Board of Trustees of the Science Museum

Optical model of a four lens telescope
King's College, London| Enquiries to Science Museum, London
© The Board of Trustees of the Science Museum

Optical model of a four lens telescope.
Science Museum Group
© The Board of Trustees of the Science Museum, London

Optical model of a four lens telescope.
Science Museum Group
© The Board of Trustees of the Science Museum, London

Optical model of a four lens telescope, maker unknwon, 1752. Once belonged to Stephen Demainbray. A handwritten inscription on the base reads: 'Plan of Four Lens Telescope with Threads'.

This model is one of a series of optical models that were once owned by Stephen Demainbray and used by him in his lectures on natural philosophy. it is the most complex of his telescope models and shows the arrangement of the standard four-lens telescope that was popular at the time. It consists of an object, primary and a final image, four convex lenses, and an eye hole. Originally silk cords would have been used to represent the rays of light. Demainbray worked as superintendent at the King's observatory at Kew from 1768 and his collection of instruments and apparatus was absorbed into the King's own collection.

Details

Category:
King George III
Object Number:
1927-1437
Materials:
base, fruitwood and object,images,lenses, ivory
type:
optical demonstration equipment
taxonomy:
  • visual and verbal communication
  • furnishing and equipment
  • tools & equipment
credit:
King's College, London