Optical Domes: Design, Applications, and Custom Solutions

Optical domes, also known as dome windows, are sophisticated optical components engineered for superior performance in imaging systems. These high-precision elements are vital for applications demanding clarity and durability, and their unique design allows them to excel in challenging environments.

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Optical domes are specialized protection windows with a distinct dome shape, designed to enhance light transmission and optical performance. Unlike flat optical ports, domes feature a curved surface that minimizes distortion and maximizes field of view. Made from resilient materials such as sapphire, fused silica, and BK7 glass, these components safeguard sensitive optical instruments while delivering exceptional clarity.

 

Design Principles

To achieve optimal performance, the design of optical domes must address several critical factors:

• Material Choice:

  Selecting materials with the right optical and mechanical properties is essential. The material must offer high optical clarity, appropriate refractive index, and durability.

• Anti-Reflective Coatings:

  Coatings applied to optical domes reduce reflection losses and enhance light transmission, contributing to improved optical performance.

• Curvature Design:

  The curvature of the dome affects its optical characteristics, including field of view and image distortion. Accurate design is crucial for balancing these factors to meet application-specific needs.

• Mounting and Sealing:

  Proper techniques for mounting and sealing are vital to protect the enclosed optical system from contamination and damage, ensuring its reliability.

• Environmental Resilience:

  Domes often operate in extreme conditions, such as underwater or in aerospace applications. The design must account for factors like pressure resistance, temperature stability, and abrasion resistance.

 

For more information, please visit Stock Optical Domes manufacturer.

 

Key Applications

1. Surveillance and Security: Security cameras and surveillance systems use optical domes to defend against vandalism and environmental conditions, ensuring the longevity and effectiveness of these systems.

2. Underwater Imaging Systems: In underwater environments, light refraction can distort images. Optical domes address this by smoothing the transition between water and air, reducing distortion and preserving image quality.

3. Wide-View Cameras and Detectors: Optical domes protect camera lenses and detectors, shielding them from damage and reducing surface reflections. Their curved design improves optical efficiency, particularly for wide-angle applications.

4. Scientific Instruments: Telescopes, spectrographs, and other scientific devices benefit from optical domes, which help maintain precision and clarity in various observational and measurement tasks.

5. Aerospace and Defense: Used in aircraft, drones, and missiles, optical domes ensure clear and reliable performance for surveillance, reconnaissance, and targeting systems, all while providing robust protection for onboard sensors and cameras.

 

Custom Optical Domes Solutions

Shanghai Optics specializes in creating custom optical domes to meet diverse requirements. Our offerings include UV fused silica, BK7, germanium, ZnSe, sapphire, and IR domes. Rather than providing a fixed catalog, we work closely with clients to tailor solutions, recommending the best substrates, coatings, and designs for their specific needs.

Contact Shanghai Optics today! We'd be more than happy to discuss your projects and how to best bring them to fruition.

BUILD TO ORDER
MOLDED GLASS DOME CAPABILITIES

PARAMETERS COMMENTS Maximum Operating Pressure   Up to 30,000PSI Glass domes can go to over 100,000psi. However, dome mounting  is the limiting factor in pressure systems. The maximum operating pressure  is determined by how the dome is mounted. Over time mounting may  contribute to degradation of maximum operating pressure.  External Pressure only (convex side).  Never operate with internal, concave side pressure.  Surface Quality   Better than 10/5 scratch/dig Proprietary Rayotek Non-contact glass molding technologies introduce no scratches or mold marks on the glass surface. Both surfaces are pristine, better than ground & polished. Testing   Proof pressure testing up to 100,000PSI Rayotek maintains a proof pressure testing lab with NIST traceable measurement capabilities. Test equipment includes: pumps, gauges, a confocal laser surface defect measurement station & furnaces. Glass domes & coupons can be dried to a specified dew point to avoid damaging glass during non-destructive proof pressure testing. Most fluids & gasses Can be tested in virtually any chemistry; some chemistries will require special tooling & fixturing for safety & reliability of measurements. Max temp C Rayotek has air & atmospheric controlled furnaces up to over a meter in size for testing. Helium leak checking Can measure He leak rates down to 5x10^-12 Atm-cc/sec helium. Dry MOR bar, tensile &  flexural testing Testing can be performed in air or a controlled atmosphere. Test pieces can be dried in a controlled manner to reduce micro crack moisture impact on test results. Dome Materials  Transparency  Max Temp  Relative Cost  Comment        Borosilicate glass 340nm to 2.3 microns 450C Mid-range Highest quality, traceable optical borosilicate glass is used for optimized thermal, mechanical & chemical resistance. Durability   Excellent High quality, very homogeneous borosilicate glass is exceptionally durable in high mechanical, thermal &/or chemical environments. Housing Materials  Rayotek mounts domes into flanged & threaded metal housings. Go to Rayoteksightwindows.com for more information Stainless steel 316 Good for chemical, industrial & pharmaceutical applications for moderate temperatures. Titanium Excellent for ultra-high pressure & temperature applications. Also for situations where high strength to weight ratio are critical such as aerospace & space. Inconel Ideal for chemical & temperature extreme environments. Steel Low cost option for industrial applications. Ideally should be treated to avoid rust. Availability   Build to Order Standard sizes built on order, all subcomponents stocked, designs already engineered .  Lead time 2-4 weeks. Custom Built to customer spec. Co-engineering with customer required. Lead time project determined. Industries Served Applications Aerospace & aviation Camera, lighting, radome, sensor & instrument covers, cockpit view domes, nose cones for recon & surveillance. UAV & RPV Camera & lighting covers & nose-cones for drones & missiles. Deep sea & marine, AUV & ROV High pressure camera, lighting, sensor & instrument covers, clamshell buoyancy, spherical & hemi-spherical pressure boundaries for manned & unmanned  submersibles. Surveillance & security High strength, wear resistant optical camera, visible & NIR. Optics & astronomy Large lenses, reflectors & collectors. Petroleum & gas Downhole (borehole) cameras & lighting covers, inverted manway covers. Optics fabricators &  master opticians Low cost molded blanks that can be ground & polished by customer. Art & architecture Public art installations & high-end commercial architecture. Why Rayotek?     Onsite engineers, physicist & master optician to serve you.      24-years of expertise in dome manufacturing, sealing, materials mating & mounting.    Certified Small Business.   ISO : Certified.    ITAR Registered.    State-of-the-art manufacturing, test equipment & measurement analysis.   US Manufacturing at Rayotek's  30,000 SqFt facility. NOTES         For custom sizes a mold & tooling charge will apply. However, for  quantity runs the mold/tool cost amortized per dome is often still lower than grinding & polishing

 

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