Assertion: telescope's aberration | /r/HasProperty | corrected
Facets:
value: fortunately
type: MANNER
value: afterwards
type: TEMPORAL
Source sentences:
text: As a practical man, Dollond at once put his doubts to the test of experiment: he confirmed the conclusions of Klingenstierna, discovered a difference far beyond his hopes in the refractive qualities of different kinds of glass with respect to the divergence of colors, and was thus rapidly led to the construction of lenses in which first the chromatic aberration—and afterwards—the spherical aberration were corrected.
text: So if the spherical aberration can be corrected, a very wide field of view can be obtained.
text: Fortunately this aberration can be corrected by placing a single-element lens of special design at a particular distance in front of the mirror.
text: Chromatic aberration is corrected by making the meniscus lens slightly diverging.
text: However, while eliminating diffraction patterns this leads to several other aberrations that must be corrected.
text: Optical aberration is corrected by employing a second fastidiously designed lens mounted behind the most objective lens of the telescope to catch up on the optical aberration and cause 2 wavelengths to focus at a similar purpose.