Rectangular Pressure Window Calculator
Estimate indicative thickness for flat rectangular optical windows under pressure differential for subsea, vacuum and custom applications.
When to Use a Rectangular Pressure Window
Rectangular windows are generally used where system design or mounting constraints prevent the use of a circular window.
Due to stress concentrations at edges and corners, rectangular windows typically require:
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Greater thickness
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Higher safety factors
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More careful design consideration
Indicative thickness only
The calculated value is intended as an initial estimate and should not be treated as a final design approval.
Support condition matters
Rectangular windows are highly sensitive to edge support, aspect ratio and mounting method. A clamped window will usually perform differently from a simply supported window.
Final design may require more thickness
Manufacturing tolerances, proof testing, coating requirements, thermal effects, edge quality and safety margins can all increase the final recommended thickness.
Typical enquiries we receive:
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Subsea camera housings
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Pressure vessels and sealed systems
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Custom optical windows for harsh environments
Common Materials for Rectangular Pressure Windows
Material selection depends on optical transmission, mechanical strength, environmental conditions and coating requirements.
Rectangular pressure windows are typically used in systems where geometry or mounting constraints limit the use of circular designs.
Frequently Asked Questions
Calculator results are indicative only and do not constitute certified design approval. Final suitability depends on mechanical design, material data, mounting method, safety requirements and application environment.