How a 1968 light pen turned days of drafting into minutes
In short: Watch how architects in California revolutionized design by plotting points directly onto computer screens. This archival footage captures the birth of modern computer-aided design, showcasing a leap in efficiency that still defines our digital workspace today.
In this 1968 broadcast of Tomorrow's World, draughtsmen Norman Schweitzer and Alan H. Halpin demonstrate an innovative light-sensitive pen. By touching the pen to a display unit, they could plot points that instructed a computer to instantly draw lines, which could then be scaled or amended in real time.
The technology represented a massive shift in architectural workflow: a scale drawing that traditionally required several days of manual labor was completed in just 90 minutes. The clip serves as a historical landmark for the transition from physical drafting to digital modeling.
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- Summary by Intellect · source: 1968: The Light Pen | Tomorrow's World | BBC Archive
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