🛠️ Invention or technique

Confocal microscope

Microscopio confocal

Date
1955-1957 · confidence high
Place
Cambridge, Massachusetts, United States
Credited to
Marvin Minsky
Field
Communication

⚠️ Disputed: the sources disagree.

What it is

A microscope that illuminates a single point and rejects out-of-focus light with a pinhole, to obtain sharp optical sections of thick samples. Minsky conceived it in 1955 and patented it in 1957.

Petráň (Plzeň, 1967) built a Nipkow-disc confocal microscope; the technique became popular only in the 1980s with lasers and computers.

What it led to

  • laser scanning microscopy in biology
  • 3D reconstruction of cells and tissues
  • high-resolution fluorescence microscopy
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Sources✓ verified 2026-11-06