FRS 123: Technology inFRS 123: Technology inArt and Cultural HeritageArt and Cultural Heritage

Devices for Linear PerspectiveDevices for Linear Perspective

Zahn’s Camera Obscura (1685)Zahn’s Camera Obscura (1685)

• Zahn’s portable camera: built-in lens, Zahn’s portable camera: built-in lens, screenscreen

Dürer’s devices (early 1500s)Dürer’s devices (early 1500s)

• Draftsman’s netDraftsman’s net

• Artist’s glassArtist’s glass

Dürer’s devices (early 1500s)Dürer’s devices (early 1500s)

• Point plotting devicePoint plotting device

Cigoli’s Perspective Machine Cigoli’s Perspective Machine (1610)(1610)

• Moving pen moves bead in viewing Moving pen moves bead in viewing frameframe

• Two-handed interface (first etch-a-Two-handed interface (first etch-a-sketch?)sketch?)

Superposition DevicesSuperposition Devices

– 1806: Wollaston’s camera lucida1806: Wollaston’s camera lucida

– 1811: Varley’s graphic telescope1811: Varley’s graphic telescope

– Simultaneously see image of real world, Simultaneously see image of real world, paperpaper

Online Perspective Applet Online Perspective Applet

http://graphics.stanford.edu/courses/cs99d-98/perspective/assistant.htmlhttp://graphics.stanford.edu/courses/cs99d-98/perspective/assistant.html