Information
Glass
Couting
Quality Mirror
Quality Warranty
Alluna Ritchey Chretien Telescopes
Alluna Newtonian Astrograph Telescopes
Info: Ritchey-Chretien
or Dall Kirkham Telescope?
Info: Easy collimation
of a Alluna Ritchey Chrétien Telescope
| Preface |
|
Whether
You need a parabolic, hyperbolic, or spherical mirror, Optics in Alluna
you get for your telescope and your application the matching and manufactured
for the most demanding optics.
Primary
Mirror and complete Ritchey-Chrétien Cassegrain Systems shall be
of the highest accuracy and surface smoothness made by us. Our lenses are
known for their high quality known. Sharp star images, high resolution
at the highest Contrast the hallmarks of our primary and secondary. Our
clients are manufacturers of telescopes, public observatories, research
and ambitious Amateur astronomers who want to be sure to get a perfect
look. |
For
Industry, Research and Technology, we produce large single optics for Schlieren
optics, lidar telescopes, collimators, lasers and other Applications.
To
Our customers include, for example, the German Aerospace Center and Space
DLR and the Institute of Physics Bern / Space & Planetary Sciences
the Internationale Amateursternwarte IAS and many more |
| Glass |
High
quality Telescope mirrors require high-quality glass. We use the smaller
sizes mostly "fine anealed and Precision annealed Pyrex ® No. 7740
". For larger mirrors, and particularly high-quality Applications are ceramics
such as Zerodur, Astro Sitall CO115m or CCZ HS Ohara used. Glass ceramics
have the advantage of lower Thermal expansion coefficient of about 0.1
× 10-6 1 / K, therefore, virtually no expansion with temperature
changes.
The
Glass thickness is chosen so that under normal, proper industrial storage
levels flares can occur almost on the surface.
20" Pyrex Cassegrain f2,5 |
24-inch glass-ceramic mirror |
|
| Coating |
| Than
Standard coating, we offer an aluminum coating with plasma polymer protective
layer and a reflection of 94%. In the 94% over nearly the be entire visible
wavelength range exceeded. For special applications are also other coatings
such as silver or Gold for the IR range possible. As a service we offer
cleaning and recoating of telescope mirror. |
| Quality
Warranty |
| With a mirror of Alluna
Optics give you one of the best currently available on the market Optics
for the telescope. The production does not occur in a highly possible time
but in the most profit potential optical Quality! We guarantee this and
provide any look with a certificate and the original Interferogram.
The quality of our Mirror
will convince you! Guaranteed for standard parabolic we have a surface
accuracy of better than lambda / 8 PV wavefront be achieved at 632nm (typically
at or better L/10 PV wavefront), Strehl better .96. For Ritchey Chretien
systems, we guarantee a surface accuracy of 1/20 wave RMS / 633nm. Each
Alluna Mirror has a very smooth surface, the other from almost any manufacturer
reached.
20 Zoll Ritchey-Chrétien
Tubus am Prüfstand |
30 Zoll Parabolspiegel |
|
| Alluna
Ritchey Chretien Telescopes |
Our Ritchey Chretien RC
telescopes are real systems with a hyperbolic primary mirror and a hyperbolic
secondary mirror. The optical design was developed by one of the best European
specialists in this field for Alluna Optics developed. In our own production
every single mirror set is carefully manufactured and tested.
In the development of high-end
RC-tube made no compromises. Precision and reliability focused on the development
and construction in the first place. In the run - all parts have been on
weight, stability and expansion behavior optimized. The aluminum components
are for the Carbon Truss Tube manufactured on modern CNC machines. This
is a complicated Honeycomb / Taschenkostruktion a very light but extremely
strong, rigid Geamtkonstruktion achieved. The accuracy of milled aluminum
is up to the 24-inch OTA components at a high accuracy 2-4/1000 of a millimeter.
more our Ritchey Chretien
telescopes can be found here
more
about our Ritchey Chretien telescopes
CNC manufacturing of tube
Components
Honeycamp Backplate 20 inch
Alluna RC
Alluna RC-16 Telescope
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| Alluna
Newtonian Astrograph |
Our Ritchey Chretien Telescopes
and Newtonian Astrograph Telescopes manufactured from the best materials
with modern methods. With every telescope you get a masterpiece of mechanics
and the guarantee for a perfect optic. It is the same honeycomb structure
is pocket for a light but highly stable and rigid truss tube used. All
components are made directly with us or by associated companies of the
environment. Our Newtonian Astrograph are available in sizes 16, 18, 20
and 24 inches as standard f3,8 systems, possible is f3,4 to f4,0.
more
about our Newtonian Astrograph telescope
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