Fresnel lens (Bi-prism in metal holder) Bi-prism in metal holder Object Number: 1971-562 Pt1 type: fresnel lens Image © The Board of Trustees of the Science Museum
White light bleached phase reflection hologram of a metal specimen in a tank of water. Made by Dr Watson's research group in 1986 White light bleached phase reflection hologram of a metal specimen in a tank of water
Spectacles, steel D eye protectors with flat smoked glass. Spectacles, steel D eye protectors with flat smoked glass
Brooch, coloured ambrotype of man in military uniform, plain back, scroll decoration, 62 x 55 mm. Brooch, coloured ambrotype of man in military uniform