193:"COSMIC JOURNEY: A HISTORY OF SCIENTIFIC COSMOLOGY. The First Telescopes by the Center for History of Physics, a Division of the American Institute of Physics"
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they can a be pre-18th century simple single element objective lenses which were used before the invention of
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caused by chromatic aberration (the uncorrected chromatic aberration fell within the large
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Modern instruments may use a non-achromatic objective lens which is well-corrected for
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at only one wavelength. Monochromatically corrected objectives can be found in
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spectral line of 0.6562725 micrometres. They are also used in
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where multiple single narrow wavelength images are used in
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Non-achromatic objectives are also used in monochromatic
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The history of the telescope by Henry C. King – 2003
52:Early telescope objective, such as those built by
112:working with narrow spectral lines such as the
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68:). This allowed the observer to use higher
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72:while limiting the interfering rainbow
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43:Non-achromatic telescope objectives
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148:for wavefront error sensors for
84:Modern non-achromatic objectives
48:Early non-achromatic objectives
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24:which is not corrected for
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62:Constantijn Huygens, Jr.
18:non-achromatic objective
162:List of telescope types
144:, and highly corrected
118:astrographic telescopes
122:stellar classification
136:applications such as
90:spherical aberration
26:chromatic aberration
80:pattern at focus).
128:Other applications
58:Christiaan Huygens
104:over the desired
66:aerial telescopes
54:Johannes Hevelius
37:achromatic lenses
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195:. Archived from
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110:solar telescopes
60:and his brother
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150:adaptive optics
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142:beam expanders
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114:hydrogen alpha
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22:objective lens
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199:on 2008-04-09
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106:field of view
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92:and off-axis
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70:magnification
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201:. Retrieved
197:the original
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138:collimators
102:astigmatism
94:aberrations
78:diffraction
229:Telescopes
218:Categories
203:2009-05-13
168:References
30:telescopes
156:See also
96:such as
34:doublet
224:Lenses
20:is an
134:laser
74:halos
28:. In
100:and
98:coma
56:and
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16:A
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