3.75M Clamshell Observatory Dome
The 3.75M Clamshell Observatory Dome is a state-of-the-art, fully automatic, and highly compact observatory dome designed for wide sky access, rapid deployment, and reliable protection of valuable astronomical equipment.
Unlike conventional slit-style observatory domes, the clamshell design opens broadly to provide an exceptional 180° / 360° unrestricted field of view. When the dome opens, the observer experiences the feeling of being directly under the stars, with a clear and immersive view of the night sky.
This makes the 3.75M model an excellent choice for laser communication systems, big-aperture telescopes, seeing monitors, DIMM monitor installations, research facilities, educational observatories, and compact professional astronomy projects.
Key Advantages
Feature | Description |
Clamshell Opening Design | Provides wide, unrestricted sky access compared with traditional slit domes |
180° / 360° Field of View | Offers an immersive observing experience with broad exposure to the night sky |
No Dome Sync Required | The telescope does not need to be synchronized with dome rotation |
Independent Shutter Movement | Both shutters can be moved and positioned separately |
Wind-Shading Capability | Shutters can be positioned to help shield the optical group from wind |
Compact Footprint | Outer footprint of only 2,100 mm, ideal for limited-space installations |
Fully Automatic Operation | Designed for automated observatory use and rapid deployment applications |
Strong Belt Drive System | Reliable shutter movement using a 24VDC belt drive system |
Computer Control | Integrated USB port and Ethernet interface for easy computer connection |
Manual Positioning Mode | Shutters can be placed in any desired position when operated manually |
Designed for Wide Sky Access
The clamshell configuration gives this dome a major advantage over traditional slit-style domes. Instead of viewing the sky through a narrow opening, the two shell sections open broadly, creating a highly immersive observing environment.
This wide opening is particularly valuable for applications where unrestricted sky visibility is important, including:
Laser communication
Big-aperture telescope operation
Automated observing systems
Seeing monitor installations
DIMM monitor stations
Educational demonstrations
Public outreach astronomy
Rapid-deployment observatory systems
Because the telescope does not need to be synchronized with the dome opening, operation is simpler and more flexible. The independently moving shutters can also be positioned to provide wind shading for the optical system.
Drive and Control System
The 3.75M clamshell dome is equipped with a strong 24VDC belt drive system for both shutters. This system is designed to provide reliable opening and closing under demanding conditions.
The supplied control system can be connected directly to mains power from 110VAC to 220VAC. Computer control is available through the integrated USB port or Ethernet interface, making the dome suitable for automated and remote observatory applications.
For projects requiring fast access to the sky, an optional rapid-deployment shutter drive system is available. An optional snow removal vibration system can also be supplied for sites where snow accumulation may be a concern.
Technical Specifications
Specification | 3.75M Clamshell Dome |
Inner Diameter | 2,000 mm |
Outer Diameter / Footprint | 2,100 mm |
Height — Dome Closed | 3,095 mm |
Height — Dome Open | 1,650 mm |
Height of Axles | 1,550 mm |
Weight | 585 kg |
Opening System | Two independently moving clamshell shutters |
Drive System | Dual belt drive system |
Shutter Drive | 24VDC belt drive system |
Control Interface | USB and Ethernet |
Power Supply | 110VAC–220VAC mains connection |
Colour Options | RAL colours available, excluding metallic finishes |
Optional Access | Access hatch / door |
Optional Systems | Rapid-deployment shutter drive system; snow removal vibration system |
Ideal for Seeing Monitors and Compact Observatory Projects
With an exceptionally compact outer footprint of 2,100 mm, the 3.75M model is especially suitable for seeing monitor and DIMM monitor applications. Special steel tower configurations may also be supplied for DIMM monitor installations, depending on project requirements.
Its combination of compact size, wide sky access, automatic operation, and reliable shutter control makes it a practical solution for professional, institutional, and research-based observatory projects.
Options
Option | Description |
Access Hatch / Door | Provides easier access for inspection, maintenance, or service |
Rapid-Deployment Shutter Drive | Enables faster opening and closing for time-sensitive applications |
Snow Removal Vibration System | Helps manage snow accumulation in cold-weather installations |
RAL Colour Selection | Available in standard RAL colours, excluding metallic finishes |
Steel Tower for DIMM Monitors | Available for selected seeing monitor applications |
Typical Applications
Laser communication observatories
Big-aperture telescope enclosures
DIMM and seeing monitor stations
University and research observatories
Remote telescope installations
Educational observatories
Public outreach facilities
Rapid-deployment astronomy systems
Compact professional observatory projects
