achromatic lens


  • Achromatic Lens
    Achromatic Lens
  • WordNet 3.6
    • n achromatic lens a compound lens system that forms an image free from chromatic aberration
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Webster's Revised Unabridged Dictionary
    • Achromatic lens (Opt) a lens composed usually of two separate lenses, a convex and concave, of substances having different refractive and dispersive powers, as crown and flint glass, with the curvatures so adjusted that the chromatic aberration produced by the one is corrected by other, and light emerges from the compound lens undecomposed.
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In literature:

The inner lens is an achromatic 3 1/4 inches diameter, its focal length being 30 inches.
"The History and Practice of the Art of Photography" by Henry H. Snelling
This wonderful lens is achromatic, and free from spherical aberration and distortion of image.
"How it Works" by Archibald Williams
A similar argument may be applied to find at what point an achromatic lens becomes sensibly superior to a single one.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4" by Various
Lens, regular, meniscus achromatic, 3-inch focus.
"Kodaks and Kodak Supplies, 1914" by Canadian Kodak Company

In science:

Since the polarization analysis has been performed, this lens can be polarimetrically unfavorable. A custom “antichromatic” doublet is designed to create an achromatic second image, compensating for the chromatic effects of the first two lenses.
The Prototype of the Small Synoptic Second Solar Spectrum Telescope (S5T)
An achromatic mirror combination acting as ”field lens” conjugates the two diffractive lenses.
Fresnel Interferometric Imager: ground-based prototype
We have taken into account all its optical elements: the Fresnel array, field lens, zero order mask, blazed FZL with its manufacturing charcacteristics and the final achromatic doublet.
Fresnel Interferometric Imager: ground-based prototype
Theoretically, the emerging beam is perfectly achromatic (Faklis & Morris 1989 ), but divergent. A lens (4) is placed to make it converge.
Fresnel Interferometric Imager: ground-based prototype
The focal module is composed of a Maksutov telescope used as a field lens, a cophased diverging Fresnel diffractive lens situated in the pupil plane, and an achromatic doublet next to that pupil plane.
Fresnel Interferometric Imager: ground-based prototype
If the edge of the image crosses the lens before the break time, the microlensing signal appears as an achromatic amplification peak in the light curve (Loeb & Perna 1998).
Microlensing of collimated Gamma-Ray Burst afterglows
Now consider the typical microlensing event; although the lens is achromatic, from equation (20) we see that the amplitude of the closure phase signal is inversely proportional to the cube of the wavelength.
Bringing closure to microlensing mass measurement
However, the achromaticity of the lightcurve only holds good if the source star is resolved and the lens is dark.
RIP: The Macho Era (1974-2004)
The two beams from the Wollaston traversed a holographic diffraction grating (Kaiser, HFG 550) and were imaged onto a Peltiercooled CCD camera using an achromatic lens. A spectral resolution of about ∼ 1 nm was readily achieved.
Measurement of the complex dielectric constant of a single gold nanoparticle
An achromatic lens focuses the beam to 20 µm at the site of the ion.
Single barium ion spectroscopy: light shifts, hyperfine structure, and progress on an optical frequency standard and atomic parity violation