Fresnel lighthouse optic

Made:
1890-1900 in England and Borough of Birmingham
manufacturer:
Chance Brothers Limited
inventor:
Augustin Jean Fresnel
and
Georges Louis Leclerc

Ninety degrees, section of a fixed-lens (4th-order) lighthouse optic, 36 inches high, (internal crack in top prism) by Chance Brothers, Birmingham, England, c. 1895.

Details

Category:
Optics
Object Number:
1958-102
Materials:
glass, metal (unknown), copper (alloy), brass (copper, zinc alloy) and putty
Measurements:
overall: 915 mm x 440 mm x 310 mm, ,
type:
lighthouse lamps and optics
credit:
Stevenson, A.D.