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apochromatic

apochromatic

1 9.9
A lens that shows images with very little color on the edges
  • adjective
  • /ˌæpəˈkrəʊmətɪk/
  • Specialized
translation icon : apocromático
  • With its apochromatic design, the camera lens ensures vibrant colors in every photograph.
  • apochromatic refractor

Examples

  • The apochromatic lens produces clear images free from color distortions.

  • PHOTO (COLOR): Senior Justin Crepp observes through the 7-inch Meade apochromatic refractor under the supervision of faculty member Jonathan Hall.

    Academic text (2003)
  • Computer control added $750 to the cost of the 7-inch apochromatic refractor.

    Academic text (2003)
  • Good apochromatic glass refractors in the 5- to 7-inch class, with computer controls, cost $5,000 to $9,000.

    Academic text (2003)
  • In our view, the location of our observatory at a relatively bright site did not justify the most expensive optics, so we chose a less expensive apochromatic glass 7-inch refractor.

    Academic text (2003)
  • Achromatic refractors in the 4- to 6-inch class cost approximately $700 to $1,000, and apochromatic, manual 4- to 5-inch instruments range from approximately $2,400 to $3,000.

    Academic text (2003)
  • Astronomers prefer apochromatic telescopes for their ability to minimize chromatic aberration.

Synonyms

apochromat
vsapochromatic
  • Specialized
9.9

Made so three colours of light come to the same focus point

is corrected for both color and spherical errors reducing color distortion

How Corrected

apochromatic
  • Specialized
1 9.9
achromatic
1 8.1
corrected
3.7
uncorrected
3 5.1

Surface Forms

apochromatic positive

Morphology

apochromatic = chromatic (semi-transparent) = apo + chromatic

The base 'chromatic' clearly relates to colour, but the combining form 'apo-' is a technical Greek element and the full term is a specialized optical term not fully transparent to general learners.

Etymology

Apochromatic comes from Greek parts apo- meaning 'away from' and chroma meaning 'color'. So an apochromatic lens is made to remove color errors, which is why it gives images with very little color blur or coloured edges.