Ophthalmic lens blank in crown glass of refractive index 1.523

Made:
1986-1987 in St Asaph
maker:
Chance-Pilkington
Ophthalmic lens blank in crown glass of refractive index 1

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Ophthalmic lens blank in crown glass of refractive index 1
Science Museum Group
© The Board of Trustees of the Science Museum

Ophthalmic lens blank in crown glass of refractive index 1.523, very light brown tint, type SP9, by Chance-Pilkington, St Asaph, Denbighshire, Wales, United Kingdom, 1986-1987

Details

Category:
Optics
Object Number:
1987-10
Materials:
glass
Measurements:
overall: 15 mm 65 mm, .07kg
type:
ophthalmic lens blank
credit:
Chance-Pilkington