Optical performance that holds through sterilization, autoclave, and field use.
Medical optics qualify against more than dimensions: EtO, gamma, autoclave, and reprocessing chemistry all touch the imaging path. We engineer the resin, stack, and coatings against the device's validated regimen, then capture the optical evidence the customer's DHF needs alongside the dimensional release.
Where polymer optics show up across a medical-device portfolio.
- Diagnostic imaging optics
- Lenses and windows for cart-based and handheld imagers — VIS/NIR transmission specified per the imaging band, not the marketing band, with scatter held to the sensor's noise floor.
- Sensor covers
- Hard-coat AR stacks for the patient-contact surface; abrasion, cleaner-chemistry, and disinfectant compatibility verified against the reprocessing protocol the device's IFU calls out.
- Endoscope optics
- Distal lenses, light-guide windows, and illumination optics that survive repeated autoclave or low-temperature sterilization without contrast loss or coating delamination.
- Fluorescence and illumination
- Bandpass and dichroic stacks for excitation and emission paths, with transmission shift envelopes tracked against the as-deposited reference across the device's reprocessing budget.
- Fiducials and markers
- Molded polymer fiducials with surface form and reflectance held to navigation-system tolerances — disposable or limited-reuse, called out in the device's instructions for use.
Where medical optical programs slip — months after the part passed dimensional release.
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Failure mode
Sterilization-induced stress shows up at the optical bench after the part passed dimensional validation.
What we do about it: model and measure birefringence and form change across the validated EtO, gamma, and autoclave cycles the device's IFU specifies. Sterilization coupons from the production cavity, scanned wavefront and transmission deltas captured against the as-deposited reference.
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Failure mode
Leachables and extractables that pass ISO 10993 cytotoxicity still drive yellowing or haze at the imaging window over device service life.
What we do about it: stock and resin selection co-reviewed with the customer's biocompatibility lead; aging coupons run alongside the device's own ISO 10993 work, with optical deltas captured under the actual reprocessing protocol — not a generic accelerated soak.
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Failure mode
Yellowing under EtO or gamma surfaces only after the device clears 510(k) submission, not before.
What we do about it: candidate resins screened with dose-staged gamma and parametric EtO exposure up front, before tool kickoff. Transmission and b* shift envelopes tracked across the dose range; selection rationale documented for the customer's DHF.
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Failure mode
Coating delamination on a part that passed scratch and adhesion tape — discovered on a reprocessed unit in clinical evaluation.
What we do about it: cleaner-chemistry and humidity-cycle adhesion testing built into the qualification plan, with the actual cleaner SKU the device's reprocessing instructions call out. Delamination is a lot-release reject, not a field finding.
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Failure mode
Dimensional shift from autoclave cycles invalidates the alignment the assembly was qualified at.
What we do about it: datums locked to the optical axis at design freeze, with autoclave-cycle dimensional and wavefront data captured on coupons before tool steel is ordered. Gauge R&R for the autoclaved condition, not just the room-temperature condition.
Pre-tool work that keeps sterilization risk out of the customer's DHF.
- Resin and stack screened against the device's validated sterilization regimen — EtO, gamma, autoclave, or hydrogen peroxide — before tool kickoff.
- Reprocessing cleaners and disinfectants from the IFU built into adhesion and transmission aging coupons, with the actual SKUs called out in the test plan.
- Datums tied to the optical axis at design freeze; tolerance stack-up covers cumulative dimensional shift across the validated sterilization budget.
- Coatings selected for the imaging band and the reprocessing chemistry — AR shift envelope tracked against the as-deposited reference, lot by lot.
- Release record extended with wavefront, transmission, and sterilization-cycle deltas in addition to CMM, so the customer's DHF carries optical evidence alongside dimensional evidence.
What Sandia is — and is not — in your regulatory submission.
Sandia Optical operates a quality system certified to ISO 9001:2015 and ISO 13485:2016 scope for the design, development, and manufacture of optical components supplied to medical-device customers. We are not a registered medical-device manufacturer; we supply components, and the device manufacturer owns the regulatory submission and the device-level quality record.
Our role inside the customer's design controls is to deliver the optical evidence the Design History File, the ISO 14971 risk file, and the ISO 10993 biocompatibility work need from a component supplier: material and stack rationale, sterilization and reprocessing aging data, dimensional and optical release records, and traceable lot documentation. Certificate numbers are confirmed under NDA and are not published here.
Related capabilities
- design Optical & Mechanical Design Imaging and illumination optics designed for manufacturability — DFM lives in the prescription, not the review meeting.
- manufacture Polymer Injection Molding Six all-electric presses, ISO Class 8 cleanroom, closed-loop hold and pack on every cavity.
- finish Evaporative Coatings AR, mirror, beamsplitter, and bandpass coatings via thermal and e-beam evaporation.
- finish Metrology & Testing Interferometry, profilometry, spectrophotometry, MTF, and environmental — every part has a number behind it.
Talk to a medical optics engineer.
Send the prescription, the sterilization regimen, and the reprocessing IFU. We will tell you which resins and stacks survive the validated cycle — and which evidence we can hand your DHF before tool kickoff.