RD-400 Clamshell Observatory Dome
The RD-400 Clamshell Dome is a highly advanced and versatile telescope enclosure engineered for professional astronomical observatories, optical tracking stations, laser communication systems, and other demanding scientific applications.
The system consists of a 4-metre main dome section that can be combined with a wide range of standardized riser walls, adapter rings, control systems, and environmental protection accessories. Its modular construction allows the RD-400 to be configured for ground-level observatories, rooftop installations, support towers, and specialized tracking facilities.
Designed for Professional Instrumentation
With a clear internal diameter of approximately 4 metres, the RD-400 can accommodate a wide range of telescope systems, including Ritchey–Chrétien telescopes with apertures of up to approximately 20 inches, depending on the instrument configuration and mounting arrangement.
The dome’s clamshell design provides an exceptionally wide and unobstructed view of the sky. Unlike conventional rotating slit domes, the RD-400 does not normally require continuous dome-to-telescope synchronization during open-dome operation.
Five-Section Shutter System
The RD-400 features five independently controllable shutter sections operated by a powerful and reliable dual belt-drive system.
Each shutter section can be positioned separately, allowing operators to:
Create effective wind shielding around sensitive instruments
Limit exposure to prevailing weather conditions
Maintain a wide observing field while protecting equipment
Adapt the opening configuration to the telescope’s operating requirements
Depending on the installed instrumentation and site conditions, the RD-400 can support open-dome operation at wind speeds of approximately 55–60 km/h.
Engineered for Extreme Environments
The RD-400’s rugged construction and aerodynamic profile are designed to withstand wind speeds exceeding 200 km/h, subject to the final installation, foundation, site engineering, and configuration.
This makes the dome particularly suitable for demanding locations such as:
Coastal regions
Deserts and dusty environments
High-altitude and mountainous sites
Polar and sub-zero locations
Remote or unattended observatories
The five-section shutter system provides excellent protection for telescopes, optical instruments, communication equipment, and scientific payloads. Labyrinth-style shutter joints and integrated brush assemblies help protect the interior from snow, wind-driven rain, dust, and other environmental contaminants.
Cold-Weather and Snow-Removal Options
For reliable operation in extremely cold or snowy environments, the RD-400 can be equipped with optional environmental protection systems, including:
ATC Controlled Gearbox Heating
Maintains suitable operating temperatures around critical gearbox components during deep-temperature operation.
SSRV Active Snow-Removal System
Helps prevent snow and ice accumulation on the shutter system, improving reliability and reducing operational interruptions.
When combined, these systems provide increased availability and support dependable operation in severe winter conditions.
Heavy-Duty Bearing System
The RD-400 incorporates a rugged, modular bearing system designed for long service life and minimal maintenance.
An advanced lubrication system supports smooth and reliable movement across a wide temperature range and under challenging environmental conditions. The modular construction also simplifies servicing and replacement of individual components when required.
Modular Installation Options
The RD-400 can be configured with a variety of riser walls, adapter rings, access systems, and structural interfaces.
A typical system consists of:
The RD-400 main clamshell dome section
A selected riser wall or adapter ring
A compatible dome control system
The main dome section may also be installed as a stand-alone unit without a riser wall or adapter ring. This configuration is particularly suitable for installation on an existing rooftop, structural platform, or support tower, with access provided from below.
Dome Control Systems
Two principal control options are available:
SEMI-Automatic Control System
A straightforward push-button control system for local operation of the dome shutters.
FULL-Automatic Control System
An advanced ASCOM-compatible automation system designed for remotely operated and robotic observatories. Depending on the selected configuration, features may include:
Ethernet connectivity
Integrated web server
Local push-button controls
Remote shutter operation
Observatory automation interfaces
Status monitoring and system diagnostics
Additional safety and control functions
The final control package can be tailored to the operational requirements of the observatory.
Custom Colors and Interior Finish
The standard exterior finish is brilliant white, which is recommended for thermal performance and reduced solar heat absorption.
Custom exterior colors are available using specified RAL or PANTONE® colour references. The interior is finished in matte black to minimize internal reflections and reduce stray light around sensitive optical instrumentation.
Engineering and Planning Support
With extensive experience in professional observatory construction, DOME PARTS optical can provide technical assistance throughout the planning and installation process.
Engineering support may include guidance regarding:
Concrete foundations
Structural support towers
Rooftop installation interfaces
Telescope positioning and clearances
Electrical power requirements
Data and communication cabling
Cable conduits and routing
Environmental operating requirements
System access and maintenance planning
Each installation can be reviewed to identify the most appropriate dome, riser, structural, and control-system configuration.
Worldwide Construction and Installation Service
DOME PARTS optical offers a comprehensive worldwide construction and installation service.
Because the RD-400 includes large and heavy structural components, professional assembly is strongly recommended. Experienced installation teams can coordinate the mechanical construction, system setup, sealing, testing, and commissioning of the dome.
At project handover, the objective is to provide the customer with a fully assembled and functioning observatory enclosure ready for integration with the telescope and supporting equipment.
Build Your RD-400 Observatory
Creating a customized RD-400 observatory begins with three primary selections:
Choose the RD-400 main clamshell dome section
Select the appropriate riser wall, adapter ring, or structural interface
Select the SEMI-automatic or FULL-automatic control system
Additional options can then be added based on the site environment, telescope configuration, automation requirements, and desired level of weather protection.
Contact us to discuss your instrumentation, site conditions, structural requirements, and operational objectives. Our team will help develop an RD-400 configuration suited to your observatory project.