Rectangular Pressure Window Calculator
Estimate indicative thickness for flat rectangular optical windows under pressure differential for subsea, vacuum and custom applications.
Use this calculator to estimate the required thickness of a flat rectangular pressure window based on width, height, pressure differential, material, safety factor and edge support condition. This tool is intended for early-stage design and lead qualification. Final design suitability depends on support method, edge finish, proof testing, safety requirements and application conditions.
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.
Common Materials for Rectangular Pressure Windows
Material selection depends on optical transmission, mechanical strength, environmental conditions and coating requirements.
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.