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MRF, Magnetorheological Finishing,
QED, acid etching, etching |
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The images on this page show
the cellular primary for the 24"
f3.5 Dream Astrograph. |
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Click on the image to the left to see larger
views of this optic. |
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lightweighted optics, lightweight
optics, cellular optics, open rib cellular |
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Dream
Astrograph - 24" custom cellular primary, designed by Dream Telescopes
& Accessories, Inc. |
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The finished mirrors will weigh 35.0 lbs. A solid
optic of the same dimensions and focal ratio would weigh 129.5
lbs. |
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The 24"
f3.5 Dream Astrograph will weigh less than 120 lbs., which includes
the new 4" Dream PDF focuser
with stainless steel drive screws and 3" coma corrector. |
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The CAD rendering to the left shows Dream's design
for this cellular optic. |
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lightweight telescope |
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cellular optics |
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Click the image below to see the 24" Dream Astrograph. |
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A photograph of the first 24" cellular primary
is shown to the right. This is a back view showing the ribs,
similar to the CAD view above. |
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The first 7.75" secondary mirrors have arrived
at Dream. Click below to see more images. |
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Dream is combining the benefits of aerospace composites
(specifically those that employ specific types of carbon fiber
skins over a sandwich
core) in the telescope structure with all-cellular
mirrors. |
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Such telescopes require lower payload mounts. Mounts
that are substantially less expensive in: initial cost, shipping
cost, installation costs, maintenance, etc.. The 24" Dream
Astrograph, for example, can be carried by the Paramount
ME German Equatorial Mount. |
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The thermal benefits of lighter, stiffer systems are
enormous. |
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Click below to see a chart illustrating the advantages
of open-backed cellular optics. |
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