aplanatism

Definition

1. Noun:
   • Optical property: "aplanatism" refers to the quality or condition of being aplanatic, meaning an optical system (such as a lens or mirror) is free from spherical aberration and coma. In simpler terms, it describes a lens or mirror that focuses light perfectly without distortion, producing a sharp image.

Usage Examples

• Noun:
  • The telescope's design achieved aplanatism, resulting in clear images of distant stars. (The optical system was free from spherical aberration and coma.)
  • Engineers strive for aplanatism in high-quality camera lenses to reduce image blur. (They aim to eliminate specific optical distortions.)

Advanced Usage

• "Aplanatism" in technical contexts: Often discussed in the design of advanced optical instruments like microscopes, telescopes, and photographic lenses.

  • The lens's aplanatism was verified through rigorous testing. (The property of being aberration-free was confirmed.)

• "Aplanatic system": An optical system that exhibits aplanatism.

  • An aplanatic system focuses all rays from a point source to a single point. (It corrects for spherical aberration and coma.)

Variants and Related Words

• Aplanatic (adj): describing an optical system free from spherical aberration and coma.

  • The aplanatic lens produced a perfectly sharp image. (The lens was designed to eliminate specific distortions.)

• Aplanat (n): a lens or optical system that is aplanatic.

  • The aplanat is a key component in high-end telescopes. (The aberration-free lens is essential.)

Synonyms

• Aberration-free: lacking optical distortions.
• Coma-free: specifically without coma aberration.
• Spherical-aberration-free: without spherical aberration.

Related Idioms