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Understand
The Benefits Of Dream's Engineered Lightweight Mirrors |
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r e a m |
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The chart to the left shows the internal temperature
differences between 0.7m mirror substrates as ambient temperature
falls.
The chart illustrates the substrates cooling during
a 4C/hour drop in ambient temperature. All start at equilibrium
at 20C (upper left of the chart).
The Dream engineered substrate
stays much closer to ambient temperatures than even an extremely
thin monolithic substrate, including those made from Zerodur
and Astrosital.
These comparisons did not encompass forced ventilation.
The Dream 0.7m substrate has 4 times the surface area of the
1.875" thick monolithic, yet the Dream substrate is 2 times
stiffer than the monolithic. |
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After the web page
has downloaded all three animations below, hit the REFRESH button
on your browser to synchronize the animations to each other.
At the end of the animations it will pause for three seconds
before looping again. |
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cellular optics, cellular mirrors,
cellular substrate |
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28 inch Full Thickness Monolithic Mirror: 4.67"
thick |
28 inch Thin Monolithic Mirror: 1.875" thick |
28 inch Dream Cellular Mirror: 4.0" thick |
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lightweight optics, lightweight cellular
mirrors, lightweight mirrors |
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Deep blue is the closest to ambient temperature. Note
how the Dream substrate reaches these blues far sooner than the
monolithic substrates. |
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Click on the image to the left to see an enlarged
view. |
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Click on the image to the right to see the 5"
minor axis secondary mirror for this OEM client. |
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