Application Case: Invar Optical Alignment Stage CNC Machining

Application context

Optical alignment stages need thermal stability and repeatable datums. Invar reduces expansion risk but changes machining economics and inspection strategy.

This is an application case playbook, not a fabricated customer success story. It describes the engineering information a buyer should prepare and the manufacturing route FabVector would evaluate before issuing a firm quote.

Suggested manufacturing route

• Machine datum surfaces and slot patterns with stress and flatness review.
• Use controlled finishing for alignment faces and fastener seats.
• Inspect geometry against optical datum assumptions rather than only external shape.

Material and finish decisions

• Invar 36 for very low thermal expansion.
• Aluminum 6061 when weight and cost are more important than thermal stability.
• Stainless or titanium when stiffness, corrosion or vacuum compatibility dominate.

Quality and risk controls

• Invar is chosen for thermal behavior, not fast machining.
• Flatness and parallelism should be tied to the optical function.
• Surface finish requirements should avoid unnecessary polishing where matte stability is acceptable.

What to include in the RFQ

• Operating temperature range and alignment datum scheme.
• Flatness, parallelism and hole position requirements.
• Material certificate and inspection report expectations.

Related FabVector resources

• Invar 36 material page
• Optics and photonics machining
• Inspection documentation

Use the RFQ workflow when the project needs price, lead time, inspection scope, material certificates or a production-ready handoff package.