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keywords: balloon-borne optical
instrument, balloon-borne telescope, airborne telescope, space
telescope, PlaneWave, Officina Stellare, US Air Force, space
domain awareness, space debris detection, ASA Astrosysteme Austria,
Goto observatory, robotic telescope, lightweight optical tube
assembly, lasercom, free-space optical communication |
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20" f5.6 corrected mR-C optical
instrument |
It weighs just
65 pounds & requires only one corrective lens,
offering the highest installed quality & throughput
in the world. |
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Lightweight, highly
engineered athermal optical instruments designed & made inside
Dream since 2003: Nazareth, PA - USA |
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This brand new instrument is optimized
for modern, small-pixel cameras for cutting-edge science &
research; Sony
IMX461 102Mp detector. |
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Q: |
What can you do with an instrument that delivers sub
arc-second resolution
when traditional technologies are delivering 1.5-2 arc-second? |
What can you do with a focal plane that delivers diffraction-limited
optical performance & 100% illumination across the entire
field? |
What can you do with a 0.5m optical instrument
that's: ~1m long, has a ~40% obscuration & weighs less
than 30 kgs standard? |
What can you do with cutting-edge, highly engineered lightweight
optical mirrors (both M1 & M2) that have;
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no print
through, |
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finished to true diffraction-limit
(HeNe) based on GenV interferometry taken while mirrors rest
on their athermal CFSC mirror mounts, tested in Dream's 5m tall vertical
test tower, |
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as low as L/100 RMS surface levels
of MSF & (Small Satellite Conference NASA, JPL, Northrop Grumman,
Boeing, Lockheed) |
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less than 10Å (1nm) RMS
surface roughness?
Small spacecraft, space-borne
optical instrument, balloon-borne optical instrument |
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What can you do with a 0.5m that has the highest
stiffness-to-weight ratio of any optical instrument in its class
because it honestly uses more engineered carbon fiber in the
structures than any other telescope in the world, all produced
inside Dream? |
What can you do with an optical instrument that keeps
itself clean, equalized to optical tolerances (a
fraction of a degree C) &
has a thermal footprint hundreds of times smaller than conventional
technology optical instruments? Lockheed Martin Skunkworks advanced manufacturing |
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A: |
The real question is; What
can't you do!keywords;
optical telescope, optical instrument, lightweight optical telescope,
lidar telescope |
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Dream Aerospace Systems' 20"
f5.6 corrected mR-C has
flawless performance across the entire field. Gone are the days
of center-spot/best performance, with ever-worsening spot &
illumination performance as you move away from the center of
the field. Dream has spent the last two decades offering unparalleled
mechanical, thermal & optical performance of the installed
optical instrument. Dream offers optical surfaces that are typically
smoother than solid mirrors, yet don't come with the mechanical
& thermal
baggage of that 200+
year old technology. Dream set out to build a better
mousetrap and the
unmatched
performance speaks
for itself. Dream is not mass-market & Dream has never
(ever) had a return. |
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True
Performance Never Fears Change. -It Defies The Status Quo. |
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optimized by Dream's optical
engineer with 40 years experience. |
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SPOT DIAGRAM: 55mm diameter field (27.5mm off-axis) spot diagram to the left shows
the industry-leading, fully corrected (diffraction-limited) performance of the lightweight Dream 20"
f5.6 mR-C
that uses only one corrective lens, for the ultimate in throughput. |
FIELD: 39.6 x 52.9 arc-min (0.5819 deg²) |
PLATE SCALE: 0.28 arc-sec/pixel using 3.76µm
pixels (0.56
when binned 2x2) |
American Meterorological Society AMS |
AGU advancing Earth and space science |
80% encircled energy for Dream's
design (RMS
radius row in bold)
is never worse than the diffraction-limit, with some locations
being 2x better than the diffraction-limit, providing margin. |
Space Symposium space foundation |
Association of Universities
for Research in Astronomy AURA |
Mass-market companies will
often over-size the boxes (40-100 microns per side) to make spots appear visually smaller, fooling
buyers. Dream is an engineering company focused on installed
performance, not empty promotional statements. |
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keywords: lightweight optical
telescope, lightweight front surface mirrors, lightweight optical
mirrors, lightweight optics, sandwich lightweight mirrors, pocket-milled
optical mirror, berrylium lightweight mirror, space optics, honeycomb
lightweight optical mirrors, optical system |
SPOT MATRIX: 55mm diameter field (27.5mm off-axis) spot matrix performance shown
to the right, separating out the visual spectrum colors individually
(columns)
and for on-axis (top row), to fully off-axis (bottom row). |
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Kepler Space Telescope KST, L3Harris
Technologies |
Note that both spot charts'
colored graphics are showing 100% of the light energy, not just
the 80% encircled energy. |
Air Force Research Laboratory,
Hubble Space Telescope HST |
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European Space Agency, NASA Ames
Research Center, |
This optical design can be
optimized for other wavebands & even larger focal planes.
It can also be quickly modified to provide wider fields. Dream
has designed optical systems as fast as f1.35, and for focal
planes as large as 135mm in diameter. |
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Contact Dream to discuss your specific needs. |
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GEOMETRIC ENCIRCLED ENERGY
(GEE): for 55mm
diameter field (27.5mm
off-axis), separating
out performance at different locations on the focal plane. Spot
charts above show performance is diffraction-limited, meaning
the visual differences to the left cannot be discerned in actual
use. We show GEE for customers who work in optics on a daily
basis. |
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Dream has dealt directly with
mechanical, thermal & optical issues that have plagued optical
systems for 400+ years - creating a better mousetrap. |
Astronomical Society
of the Pacific ASP, National Science Foundation |
The diffraction-limited optical
performance, along with essentially no thermal footprint (0.5m zeroDELTA
lightweight
mirror has no features thicker than 4mm), a smooth world-class optical finish, athermal
carbon fiber structures & high-stiffness, allow tracking
mount performance to be higher, since no mount can correct out
random, dynamic errors that are being caused by unstable traditional
instrument structures; thermal & mechanical. Survey &
mosaic imaging is easier & more precise, requiring less overlap;
a far higher throughput instrument. |
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Affect of M1's
f-ratio (radius) on the total length of an optical
instrument. |
Affect of excess
back focus on total length & "camera" stiffness. |
F3, f2.5 &
f2.0 M1's from left to right above. |
Excess back focus
increases the length of the tracking mount fork arms, increasing
their size, weight, cost & flexure - all of which are undesireable. |
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This revolutionary instrument
is packed with technology & world-leading performance. |
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The highest
stiffness, lowest
mass structures & instruments, producing cutting-edge performance. |
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The most
athermal optical
instruments, by design. Higher & more consistent performance. |
* Stop losing performance due to non-athermal mirror
mounts that dynamically distort the precision optical surfaces
as ambient temperature changes. |
* Athermal eliminates the need for complex flexures
or heavy, vibration-prone Invar metering rods. Dream's structures
match the lightweight mirrors, creating the lightest, stiffest
and highest performance instruments in the world. |
* Stop losing time focusing. Dream's athermal optical
instruments provide more open shutter time; higher throughput. |
* Constantly re-focusing means focus will be missed
more often, which will hurt resolution and intensity. |
* Using a dichroic beam splitter with non-athermal
optical instruments that come with near-constant focus shifts;
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places the main camera &
filter wheel 90° to the optical path, making the instrument
unbalanced and often increases flexure. |
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creates optical quality loss
due to yet another optical surface (dichroic), as well as quality
loss due to bending of that dichroic surface, creating more dynamic
performance losses. |
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for visual spectrum work,
it forces NIR wavelength transmission, which is notorious for
causing reflections. |
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adds more weight, causes more
flexure and requires more back focus distance. Dream's athermal
optical instruments don't need this crutch or the losses they
create. |
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95% of the structure weight (without glass optics) is carbon fiber with only 5% traditional
metals (mostly
stainless steel). |
Make sure the instrument you're
considering actually uses carbon fiber extensively, in
reality, not just in promotional statements. Mass-market companies
are infamous for using bait & switch tactics to sell products.
While they say "carbon fiber telescope," most use 5-10%
off-the-shelf (nothing special, not tuned) carbon fiber &
90-95% aluminum. Aluminum is cheap, easy to machine, low in stiffness
& has a much higher Coefficient of Thermal
Expansion (CTE). Anodized aluminum isn't remotely close in mechanical
or thermal properties to Dream's CFSC. There's no truth in advertising
(buyer beware), which is one of the main reasons Dream was founded
in 2003; to honestly make a better mousetrap. True performance
doesn't require constant refocusing to compensate for low stiffness
& non-athermal performance losses. Others who use flexures
to deal with differential material CTE are creating low-stiffness,
leading to additional performance losses. If a "carbon fiber
telescope" requires Invar metering rods, the buyer has been
deceived. |
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High altitude long endurance
(HALE), high-altitude long endurance (HALE), HALE UAS, High-altitude
pseudo-satellites (HAPS), high altitude pseudo satellites HAPS,
Helios, Lindstrand, Odysseus, Airbus Zephyr |
Defense intelligence, surveillance,
and reconnaissance (ISR), Defense intelligence surveillance and
reconnaissance (ISR), Aurora Flight Sciences, high altitude platform
station (HAPS), High-Altitude Platforms HAPS |
Knowledge
is power. Ignorance a liability. |
NASA ATLAS project - asteroid terrestrial-impact
last alert system DFM colorado early detection of dangerous asteroids |
near earth object (NEO), Kuiper
Belt Object (KBO) detection, NEO & LEO & KBO search &
recovery projects, NASA Near-Earth Object Observations Program |
Since 2003 Dream has produced
optical instruments with truly the highest amount of carbon fiber & Dream's CFSC of any company in the world. Dream has 20 years
of advanced composite expertise because we design & fabricate
all of our carbon fiber in house and always have. Others use
aluminum and solid mirrors extensively (both are 200 year old technologies), which shows in the mass and flexure
of their products. Dream's technologies produce instruments that
are often 2-3 times lighter than others who claim to be "lightweight."
Dream was founded because of the industry's obsession with deceptive
practices & exaggerated claims. Dream's CFSC
has been developed over the past 20 years and is an ideal technology
for opto-mechanical systems; high modulus, low structure &
thermal mass, with a Coefficient of Thermal Expansion (CTE) that
matches Dream's other key in house technology;
highly engineered zeroDELTA
precision lightweight optical mirrors. |
solar high altitude platform station HAPS,
Earth Observing Systems (EOS), European Space Agency (ESA) |
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Instrument includes ASCOM-compliant focus & camera rotator
built in. |
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Dream's zeroDELTA
engineered lightweight optical mirrors have unrivaled installed
performance. |
* Mechanical: high stiffness of the mirror and
for the supporting structures because the zeroDELTA precision lightweight optical mirrors are 3-6
times lighter than solid mirrors. |
* Thermal: mirror
seeing and tube
currents are eliminated due to Dream's world-leading thin-featured
zeroDELTA
high-performance mirrors & Dream's FAST. |
* Thermal: Dream's thin-featured zeroDELTA mirrors equalize hundreds of times
faster than solid
mirrors due to
their extremely short thermal
time constant.
You wouldn't build a campfire under an optical system but that's
the kind of performance limit & loss you get with a centuries-old
problem; solid mirrors. The Schlieren images below of
a 220mm solid mirror show the inconsistent & degraded performance
that opticians & instrument makers have known about for
centuries. |
"We shall look back and
see how inefficient, how primitive it was to work with thick,
solid mirrors, obsolete mirror-curves, ..." |
- George Willis
Ritchey 1928 JRASC,
Vol. XXII, No. 9, November 1928. |
stratospheric balloon borne focal
plane assembly, Caltech, MIT lincoln Labs, French National Space
Agency CNES, Harvard center for astrophysics |
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* Optical: zeroDELTA M2's have been finished to as
high as L/125
RMS surface HeNe
(4.5x beyond the diffraction-limit), with 2Å (0.2nm) RMS
surface roughness, maintaining this extreme performance over
at least a +/-3°C temperature swing, which equals the stability
of the finest grade of Zerodur. |
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0.6m
Dream zeroDELTA lightweight mirror shown with 4D Technology PhaseCam;
a technology born out of a NASA program for space telescopes. |
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* Optical: Dream's zeroDELTA optical mirrors have a complete lack
of print through,
offering the smooth surfaces of a solid mirror without
the laundry list of performance losses associated with 200+ year
old solid mirror technology. |
PhaseCam's
large, heavy & heat-producing laser module (left module)
is separate from the small, lightweight head (8.2 pounds). This
is the smallest, lightest & most sophisticated phase-shifting
interferometer on the market. Dream uses it to finish the ultra
smooth zeroDELTA lightweight mirrors. |
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For generally
upward-looking applications, the lightweight mirrors are processed/finished
based modern interfeometry data while the mirrors are in their
final athermal CFSC mirror mounts, tested
in Dream's 5m vertical test tower. |
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Outside
Dream: 0.4m
zeroDELTA lightweight mirror (<10 pounds with 2.5"
edge height) being tested with a 4D
Technology NanoCam HD on robot arm, quantifying the RMS surface roughness
of the optical surface; the smallest scale errors. Dream's in-house
polishing produces optical surfaces with 6-9Å (0.6-0.9nm)
RMS surface roughness. Dream's polish & test room is 68°F,
+/-1°F year-round. |
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Both
the lightweight primary & secondary mirrors are coated with
First Contact prior to shipping. This protects the precision
optics during shipment & provides pristine optical surfaces
for Dream's customers. |
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MIT Lincoln Labs, Los Alamos
National Laboratory, NASA, NASA JPL, Jet Propulsion Laboratory,
NASA Ames, NASA Goddard Space Flight Center GSFC |
Lightweight carbon fiber structures,
honeycomb sandwich core composites, CFRP, lightweight optical
carbon fiber structures, lightweight carbon fiber structures
for optical instruments. |
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Policies
& Warranty
Raytheon,
BAE Systems, CACI International, Oakman Aerospace, Lockheed Martin Price:
contact
Dream SWaP-C: size, weight, and power, plus
cost. |
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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 LWIR.
The above instruments are often jumping off points. Contact Dream to discuss your project's requirements. |
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opto-mechanical systems,
remote sensing, Earth observation satellites, National Aeronautics
and Space Administration NASA, Raytheon Technologies, Northrop
Grumman, Lockheed Martin, Ball Aerospace, lasercom |
pricing,
availability and specifications subject to change without notice |
Copyright
© 2003 - 2025 Dream All Rights Reserved. |
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high performance optical telescopes,
lightweight precision optical mirrors, lightweight optical mirrors,
lightweight front surface optical mirrors, lightweight telescope
mirrors, lightweight opto-mechanical systems, carbon fiber telescopes,
carbon fiber lightweight telescopes |
|
Iceye satellite, NorthStar Earth
& Space, AlbaOrbital, Planet satellite, Capella Space company,
KLEOS space company, satellogic space company, PlanetiQ weather,
SatSure satellite, SatRevolution company, Aurora Insight space
company, Earth Observant Inc., USAF WERX, Skyeon san diego California,
Albedo austin texas, discoverer horizon 2020 EU program, Airbus
Defence & Space, BlackSky satellite, ASA telescopes, Officina
Stellare italy, Planewave michigan USA, APM telescopes germany,
DFM Colorado USA, L3Harris precision optics |