📜 Theorem, law or theory

Abbe's theory of image formation in the microscope

Teoría de Abbe de la formación de imagen en el microscopio

Date
1873 · confidence high
Place
Jena, Thuringia, Germany
Credited to
Ernst Abbe
Field
Communication

What was discovered

Abbe shows that a microscope's resolution is limited by diffraction and the numerical aperture, and formulates the sine condition. It turned objective design into a calculation and set the limit of about 200 nm.

Abbe also published the illumination condenser and worked with Zeiss and Otto Schott on new optical glasses.

What it led to

  • Zeiss apochromatic objectives (1886)
  • the diffraction limit and the quest for super-resolution
  • high-quality microscopy in medicine and biology
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Sources✓ verified 2026-11-06