d-Quartz and l-quartz, optical axial sections, each 3.5mm thick, superimposed, conoscopic, 0.45 N.A. This interference figure is known as "Airy's Spiral."

d-Quartz and l-quartz, optical axial sections, each 3.5mm thick, superimposed, conoscopic, 0.45 N.A. This interference figure is known as "Airy's Spiral."

Transparency

Edwin E. Jelley

Maker
American, b. England, 1898–1965

d-Quartz and l-quartz, optical axial sections, each 3.5mm thick, superimposed, conoscopic, 0.45 N.A. This interference figure is known as "Airy's Spiral."

1933
Color transparency (Autochrome)
Overall: 3 1/4 × 3 1/4 × 1/8 in. (8.2 × 8.2 × 0.3 cm)
Gift of Edwin E. Jelley, 1963
Inscriptions Printed on applied label on plate recto, TC: E.E.J. 12.
Inscribed in blue ink on applied label on plate recto, TC: 8422 –
Inscribed in white ink on mount recto, BC: R+L Quartz. \ obj 4. \ 1933. \ Edwin E. Jelley.

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