Demainbray's optical model

Made:
1752
Optical model of a spectrum brought to a focus, 1753. Dr. Stephen Demainbray (1710-1782), a lecturer on experimental philosophy, devised these 'optical machines' as poor weather often prevented experiments on sunlight. They represented experiments on the spectrum of sunlight using prisms. Optical model of a spectrum brought to a focus, 1753. Dr. Stephen Demainbray (1710-1782), a lecturer on experimental philosophy, devised these 'optical machines' as poor weather often prevented experiments on sunlight. They represented experiments on the spectrum of sunlight using prisms. Optical model of a spectrum brought to a focus, 1753. Dr. Stephen Demainbray (1710-1782), a lecturer on experimental philosophy, devised these 'optical machines' as poor weather often prevented experiments on sunlight. They represented experiments on the spectrum of sunlight using prisms. Optical model of a spectrum brought to a focus. Optical model of a spectrum brought to a focus, 1753. Dr. Stephen Optical model of a spectrum brought to a focus. Optical model of a spectrum brought to a focus, 1753. Dr. Stephen

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Optical model of a spectrum brought to a focus, 1753. Dr. Stephen Demainbray (1710-1782), a lecturer on experimental philosophy, devised these 'optical machines' as poor weather often prevented experiments on sunlight. They represented experiments on the spectrum of sunlight using prisms.
King's College, London| Enquiries to Science Museum, London
Science Museum Group Collection

Optical model of a spectrum brought to a focus, 1753. Dr. Stephen Demainbray (1710-1782), a lecturer on experimental philosophy, devised these 'optical machines' as poor weather often prevented experiments on sunlight. They represented experiments on the spectrum of sunlight using prisms.
King's College, London| Enquiries to Science Museum, London
Science Museum Group Collection

Optical model of a spectrum brought to a focus, 1753. Dr. Stephen Demainbray (1710-1782), a lecturer on experimental philosophy, devised these 'optical machines' as poor weather often prevented experiments on sunlight. They represented experiments on the spectrum of sunlight using prisms.
King's College, London| Enquiries to Science Museum, London
Science Museum Group Collection

Optical model of a spectrum brought to a focus. Optical model of a spectrum brought to a focus, 1753. Dr. Stephen
Science Museum Group
© The Board of Trustees of the Science Museum, London

Optical model of a spectrum brought to a focus. Optical model of a spectrum brought to a focus, 1753. Dr. Stephen
Science Museum Group
© The Board of Trustees of the Science Museum, London

Science Museum Group Collections
© The Board of Trustees of the Science Museum, London

Science Museum Group Collections
© The Board of Trustees of the Science Museum, London

Optical model of a spectrum brought to a focus, maker unknwon, 1752. Once belonged to Stephen Demainbray. A handwritten inscription on the base reads: 'Prism, Screen & Convex Lens/.../Focus '3''.

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 consists of a pinhole in wood with a prism, a convex lens, and a screen. 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:
1927-1433
Materials:
base, fruitwood, pinhole, mahogany and prism,lens,screen, ivory
type:
optical demonstration equipment
taxonomy:
  • furnishing and equipment
  • tools & equipment
  • visual and verbal communication
credit:
King's College, London