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engineered lightweight
optical mirrors, lightweight front surface mirrors, lightweight
ribbed mirrors, lightweight optics, astronomical instrumentation,
astronomical instruments |
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finished & coated
Aspheric Primary Mirrors |
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Engineered Dream
zeroDELTA™
lightweight mirrors |
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Produced and processed
in-house by Dream in Nazareth, PA |
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"Your company does phenomenal
work. There is a lot of thought and heart that goes into your
products. Dream's engineering sets their lightweight mirrors
apart from competitors. Your engineering goes beyond the lightweight
aspect. You focus on actual performance!" |
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- Ted Kamprath:
40 years in professional
optics, using everything from million dollar test rooms to 144"
Continuous Polishers. |
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lightweight precision front surface
mirrors, lightweight precision optics, lightweight optical mirrors,
lightweight hex mirrors, hexagonal lightweight mirrors, precision
optics, low MSF precision optics, space mirrors |
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Click either photo (left or
right) to watch a video about the interferometry technology developed
for JWST and funded by NASA. Dream uses this technology to finish
its world-class
lightweight mirrors in house. |
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The zeroDELTA™ mirrors are tested in their final
athermal carbon fiber mirror mounts, in Dream's 5m vertical test
tower. |
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635mm zeroDELTA™ engineered lightweight
mirror & 4D Technology 2019 PhaseCam
6000
(Gen V)
dynamic
interferometer inside Dream. This was upgraded in 2023 to a higher
resolution. |
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PhaseCam is 8.2 lb for the test head (right), allowing
testing of optics at different angles and in the presence of
vibrations. A modern, enabling technology by itself.
Learn about the three optical
metrology spatial realms here. |
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precision mirrors for space,
lightweight optics for space, space optics, space lightweight
optics, space lightweight mirrors, newspace mirrors |
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Print through FEA: design iteration
7 (left - 58nm) versus the final iteration; 23rd (right - under
5nm). |
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January 5th, 2018 |
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Click above to see amazing videos
and the quality of a recently finished 20" f3.5 primary
mirror. |
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Download
the Dream TTC calculator to use the "feature"
column in the chart to the right. |
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This will allow you to compare
different mirrors to each other. |
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Modern
Optical Metrology |
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- Dream zeroDELTA™
lightweight paraboloidal mirrors - |
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* 100% high-temp cast mirrors |
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***- The zeroDELTA™ lightweight mirrors don't have to act
like one piece of glass. Through high-temperature |
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******casting, they are
one piece. |
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***- Elimination
of historically troublesome bond-line and consistency (mirror
to mirror) issues that plague |
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******lower-temp
fused and frit-bonded lightweight mirrors, even for those with
20-30+ years experience |
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******producing
them. |
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***- zeroDELTA™ lightweight mirrors won't come apart
or change figure today, tomorrow or 10 years from now. |
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* All mirrors have a plano
(flat) back, using back flange designs |
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***- Allows
for simple/conventional mirror supports. |
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***- Back
flanges create semi-closed back, producing a stiffer mirror that
can still equalize exceedingly fast. |
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* zeroDELTA™ mirrors use the thinnest
features of any off-the-shelf lightweight mirror in history |
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***- Mirrors are 70-80% lower in
weight than same diameter, profile & edge height solid mirror. |
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***- A
domino effect of mechanical improvements occur with the zeroDELTA™ engineered
lightweight mirror; less |
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******self-weight deflection, less flexure
from mirror mount, less flexure from backplate and telescope.
Maintain |
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******tight optical alignment tolerances
that come with today's faster mirrors & systems; higher mechanical |
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******performance of the total telescope. |
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***- Elimination
of quality-robbing boundary-layer mirror seeing; a centuries
old problem with all solid mirrors. |
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***- Mirror
seeing and tube currents eliminated
due to industry-leading thermal
time constant performance of |
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******Dream's zeroDELTA™ mirrors. |
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Thermal Time Constant
- Same Edge Height Solid
Mirrors Compared To 16" zeroDELTA™ |
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quartz |
ULE |
Zerodur |
borosilicate |
BK7 |
AstroSittal |
plate glass |
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306x |
336x |
360x |
400x |
490x |
497x |
648x |
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slower |
slower |
slower |
slower |
slower |
slower |
slower |
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***- Elimination of figure-distortion
caused by internal temperature gradients, making zeroDELTA™
mirrors |
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******process
& finish to the same quality levels as zero-expansion
mirrors, as proven by other professionals |
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******outside Dream who have each
finished hundreds of solid Zerodur mirrors
over their 30-45 year careers. |
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***- Zero & near zero-expansion
solid mirrors still have thermal
mass. A mirror material's Coefficient of Thermal |
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******Expansion (CTE) has nothing
to do with boundary layer losses, which still remain for all
solid and thick- |
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******featured mirrors. |
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* Unprecidented level of engineering
with 17 years of heritage |
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***- Intelligent
designs, implementation and technology that provides truly
cutting-edge total performance, |
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******without
the typical print-through baggage that has historically come
with lightweight mirrors. |
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***- Dream's
owner (Shane Santi) has been learning about lightweight mirrors
for more than 25 years and |
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******designing
them based on FEA feedback iterations for the past 15 years. |
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***- Engineering
analysis evaluates; polishing displacements (print through) &
gravity displacements (final use). |
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***- Designs
are run through as many as 30 iterations. Design changes are
evaluated after each iteration. |
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***- High
level of engineering allows zeroDELTA™ mirrors to have extremely
low (L/100 PV or better) |
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******print
through; Mid-Spatial Frequency (MSF) / "primary ripple."
Dream's internal polishing also |
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******averages
6-9Å surface roughness (smallest-scale errors). Dream
has finished primary mirror aspheres |
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******to as
close as 0.009% in radius. |
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* All
of the above at 5-10x lower cost than pocket-milled zero-expansion
lightweight mirrors. |
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size |
f-ratio |
FL |
height |
feature |
weight |
price |
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10" |
6 |
1525mm |
36mm |
3.2mm |
3.6 lbs |
contact Dream |
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12.5" |
4.8 |
1525mm |
45mm |
3.2mm |
5.4 lbs |
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14.5" |
4.1 |
1525mm |
54mm |
3.2mm |
8.2 lbs |
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16" |
3.0 |
1219mm |
63.5mm |
3.2mm |
9.5 lbs |
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16" |
3.75 |
1525mm |
63.5mm |
3.2mm |
9.7 lbs |
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20" |
3.0 |
1525mm |
78mm |
4mm |
20 lbs |
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20" |
3.5 |
1780mm |
78mm |
4mm |
21 lbs |
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24" |
3.0 |
1830mm |
87mm |
5mm |
34 lbs |
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24" |
3.5 |
2135mm |
87mm |
5mm |
35 lbs |
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28" |
3 |
2135mm |
102mm |
6.5mm |
57 lbs |
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32" |
3 |
2438mm |
116mm |
8mm |
88 lbs |
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36" |
3 |
2743mm |
130mm |
9mm |
131 lbs |
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40" |
3 |
3050mm |
145mm |
9mm |
157 lbs |
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Standard coating is enhanced
aluminum; 96% or greater reflectivity at 550nm wavelength. |
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Pricing,
availability and specifications subject to change without notice. |
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True Performance Doesn't
Fear Change. It Defies The Status Quo.™ |
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Custom Mirrors Available |
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* Dream has produced mirrors as fast as
f1.3 and R-C optical sets with system f-ratios as fast as f3. |
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* Also available; spheroids, hyperboloids,
convex, plano, finished Cassegrain optical sets, dedicated athermal
carbon fiber mirror mounts, all the way to finished telescopes.
Contact Dream
to discuss your needs. |
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10" f3 perforated |
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"Can I say: holy cow!! This looks awesome!!" |
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- European telescope manufacturer |
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Survey/Search Telescope |
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32" f4.2 Dream R-C:
fast, compact &
highly corrected Ritchey-Chretien telescope for large (61.4mm/side)
detector: survey, NEO, etc. Click
here to learn more
about this wide-field, high-throughput science telescope, camera
and mount combination. |
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Custom Cassegrain Instruments |
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24" f12 Dream
R-C: NASA |
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16" f2 Dream
Cassegrain: IRetelescope with 6-lens IR relay, 2 each - Ge,
ZnS & ZnSe, dual-band performance: USAF |
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25" Cassegrain
Telescope: Structure only, for solid
ULE M1 & M2: Turkey |
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Dream can produce
carbon fiber structures for zero-expansion optical sets, as well
as full telescopes ranging from f1.35 to f20+, from UV to far
IR. Click here to see our standard line of incredibly light R-C
telescopes or Contact
Dream to discuss your project's custom requirements. |
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Mike Lockwood Optics, Lockwood
Precision Optics, Carl Zambuto Optics, high quality OptoSigma
mirrors, asphericon high-precision aspherical on & off-axis
mirrors & reflectors, RF Royce, optical testing of mirrors,
optical metrology |
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precision aspheric front surface
optical mirrors, parabolic primary mirrors, high quality parabolic
mirrors, collimating telescopes, collimation telescopes, autocollimation
flats, Edmund Optics, hubble optics sandwich mirrors |
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space domain awareness (SDA),
space Situational Awareness (SSA), Ball Aerospace, Lockheed martin,
Boeing space, planewave instruments, NASA JPL, NASA goddard,
lightweight telescope, lightweight precision optics, lightweight
precision mirrors |
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Text (610)
360-7874 or e-mail info @ dreamscopes . com to discuss your project's needs. |
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Dream's 7000
sq ft facility |
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