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info @ dreamscopes . com |
Lightweight Ritchey-Chrètien
full Optical Tube Assemblies (OTA) |
The R-C Cassegrain has the
widest diffraction-limited field of any 2-mirror-only optical
design. |
Highly engineered,
athermal instruments designed & made inside Dream: Nazareth,
PA - USA |
The highest installed performance
2-mirror telescopes in the world. |
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Cutting-edge optical instruments with
world-leading
installed performance. |
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Since 2003 Dream has produced optical instruments
with truly the highest amount of carbon
fiber & CF skinned Sandwich
Core (CFSC) of any company
in the world. Dream designs & fabricates all of the carbon
fiber in house & has been doing composites for the past 20
years. Others use aluminum and solid mirrors extensively, which
shows in the mass of their products. Dream's technologies produce
instruments that are often 1/2 to 1/3rd the mass of others who
claim to be "lightweight," because Dream uses carbon
fiber honestly & to such a high level. 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 that matches Dream's highly engineered lightweight
mirrors. |
***- 95%
of the structure weight
(without optics) is carbon fiber
with only 5% traditional metals (mostly stainless steel). |
Make sure the instrument you're considering uses
carbon fiber extensively. Ask pointed, specific questions, especially
for the mirror mounts, and look closely
at photos. There's no truth in advertising,
which is one of the main reasons Dream was formed in 2003 and
has taken over so many aspects of the products since then. Anodized
aluminum isn't remotely close to the same in mechanical or thermal
properties as Dream's CFSC...
Buyer beware. |
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***- The highest stiffness,
lowest mass structures & instruments in the world, producing
cutting-edge all-sky performance.* |
***- While
other companies say "carbon fiber telescope," most
use only 5-10% CF by weight & 90-95% high CTE aluminum. |
******True
performance doesn't require constant refocusing to compensate
for low stiffness & non-athermal losses. |
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Knowledge is power.
Ignorance a liability. |
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Custom Dream true R-C 20" f7.5 shown in the
f5.6 focal reducer configuration.
Telescope tube 44" long.
Spider hub, vanes, inserts & hardware are stainless
steel. |
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* Both front surface optical mirrors are Dream's
zeroDELTA engineered
lightweight mirrors. |
***- Mirror
seeing and tube currents are eliminated due to Dream's thin-featured
highly engineered lightweight mirrors. |
***- Dream's
zeroDELTA mirrors equalize hundreds of times faster due
to extremely short thermal
time constant & FAST. |
***- 3-6
times lower mirror mass than solid mirror
technology,
producing far less flexure
of mirror mounts and structures. |
***- Much
higher mechanical stiffness than overly thin, extreme conical
mirrors that can't hold their optical surfaces. |
***- M2's have been finished to
as high as L/125
RMS surface (4.5x better than the diffraction-limit),
with 2Å (0.2nm) RMS surface |
******roughness & will maintain
that extreme performance over at least a +/-3°C temperature
swing, which equals the stability |
******of the finest grade (lowest
CTE) Zerodur. |
* FAST: Dream's Filtered
Air System Technology. |
***- Equalizes
the mirrors and interior air volume, while also keeping optical
surfaces clean for extended periods of time. |
***- Maintains
higher reflectivity longer, requiring fewer cleanings & extending
the useful life of coatings. |
* Policies & Warranty.
Officina Stellare Space Factory,
Officina Stellare space telescope, Officina Stellare collimating
telescope, autocollimation flat, autocollimating telescope |
The three sizes shown below
with a red background are the most common sizes and represent
shorter lead times. More than 90% of what Dream produces is custom. |
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multi-spectral optical payload,
space optical systems, earth observant space optical systems,
earth observant space telescope, lightweight space telescopes,
Ritchey-Chretien space telescope |
clear aperture |
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optical |
illuminated |
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size |
f-ratio |
back focus |
field |
M2 CA |
length |
weight |
model |
12" |
8 |
200mm |
55mm |
103.6mm |
27.8" |
25 lbs |
DRC12-8 |
14.5" |
8 |
235mm |
55mm |
119.1mm |
32.5" |
36 lbs |
DRC14-8 |
16" |
8 |
265mm |
55mm |
134.0mm |
37.1" |
41 lbs |
DRC16-8 |
20" |
8 |
325mm |
55mm |
164.0mm |
46.2" |
69 lbs |
DRC20-8 |
20" |
5.6 |
275mm |
55mm |
178.6mm |
42.0" |
65
lbs |
mRC20-5.6 |
25" |
8 |
400mm |
55mm |
195.3mm |
55.7" |
125 lbs |
DRC25-8 |
32" |
8 |
535mm |
55mm |
256.5mm |
74.3" |
215 lbs |
DRC32-8 |
40" |
8 |
650mm |
55mm |
315.9mm |
92.3" |
352 lbs |
DRC40-8 |
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If the above 55mm field Ø
is too large or small, Dream can modify an existing design, including
corrective optics. |
Visit this page to learn more about the amazing 2-mirror, single
lens 20" f5.6 that is the epitome of efficiency & performance. |
SPIE telescopes & astronomical
equipment, SPIE photonics west san diego, NASA telescope, NASA
space telescopes, USAF telescopes, USSF space domain awareness
ATLAS US Space Command |
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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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True Performance
Doesn't Fear Change. It Defies The Status Quo. |
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Survey/Search Instruments |
32" f4.2 Dream R-C:
61.5' x 61.5' (1.05 deg²) |
Fast, compact & highly corrected
Ritchey-Chretien instrument: survey, NEO, etc. Click here to learn more about this wide-field, high throughput
science instrument, camera and mount combination. |
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1m f5.4 Dream R-C:
60.1' x 60.1' (1.003 deg²) |
Fast, compact & highly corrected
Ritchey-Chretien instrument: survey, NEO, etc. Click here to learn more about this wide-field, high throughput
science instrument, camera and mount combination. |
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1m f3.375 Dream R-C:
61.3' x 61.3' (1.04 deg²) |
Faster & even more compact
than above design - Ritchey-Chretien instrument: survey, NEO,
etc. Contact Dream to learn more about this and many other options. |
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Dream uses
Modern Optical Metrology |
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Custom Cassegrain Instruments |
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24" f12 Dream
R-C: |
free-space optical communications
/ lasercom: 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: Structures for solid
ULE M1 & M2: Turkey |
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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, freespace
optical communication |
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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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high performance optical telescopes,
lightweight precision optical mirrors, lightweight front surface
optical mirrors, lightweight telescope mirrors, lightweight opto-mechanical
systems, carbon fiber telescopes, carbon fiber lightweight telescopes |

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pricing, availability and
specifications subject to change without notice |
Copyright
© 2003 - 2025 Dream All Rights Reserved. |
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text (610) 360-7874 |
electro-optical, electro-optics |
info @ dreamscopes . com |
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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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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 |