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.
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 1750 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.
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 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.
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 9001:2008 Certified. 
  ITAR Registered. 
  State-of-the-art manufacturing, test equipment & measurement analysis.
  US Manufacturing at Rayotek's  30,000 SqFt facility.
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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8845 Rehco Road, San Diego, CA 92121 USA, Tel: 858-558-3671


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