Oem 3D Body Scanning Mirror Factory
Manufacturers of structured‑light and laser‑triangulation scanners require mirrors that deliver consistent reflectance, minimal wavefront error, and dimensional stability across the scanner’s
Inquire NowOEM 3D Body Scanning Mirror Factory
Manufacturers of structured‑light and laser‑triangulation scanners require mirrors that deliver consistent reflectance, minimal wavefront error, and dimensional stability across the scanner’s operating temperature range. The following details explain the engineering considerations that define an OEM‑grade 3D body scanning mirror.
Core Technology and Design
A first‑surface mirror eliminates secondary reflections from the substrate, which is critical for maintaining measurement accuracy in fringe‑projection systems. Substrates are chosen for low coefficient of thermal expansion (CTE) to prevent figure drift when the scanner enclosure heats up during prolonged use. Typical options include borosilicate glass (CTE ≈ 3.3 × 10⁻⁶ /K) for cost‑sensitive projects and ultra‑low‑expansion materials such as Zerodur® or ULE® (CTE ≈ 0 ± 0.02 × 10⁻⁶ /K) for high‑precision metrology.
Coatings are deposited using physical vapor deposition (PVD) or ion‑beam sputtering to achieve high reflectivity and durability. Enhanced aluminum coatings (Al with SiO₂ overcoat) provide >92 % reflectance from 400 nm to 1 µm and resist oxidation. Protected silver stacks (Ag with dielectric layers) push reflectance above 98 % in the same band while offering improved resistance to humidity and sulfidation. The coating thickness is tightly controlled to keep surface figure error within λ/4 peak‑to‑valley.
Technical Specifications
| Parameter | Typical Value | Unit | Notes |
|---|---|---|---|
| Substrate Material | Borosilicate glass (e.g., BK7) or low‑expansion glass (Zerodur®, ULE®) | – | Selected per thermal stability requirement |
| Coating Type | Enhanced aluminum (Al+SiO₂) or protected silver (Ag+dielectric stack) | – | Choose based on wavelength range (visible‑NIR) |
| Clear Aperture | 50 – 300 | mm (diameter or width) | Customizable to scanner field‑of‑view |
| Surface Flatness (PV) | ≤ λ/4 @ 632.8 nm | – | Peak‑to‑valley over clear aperture |
| Surface Roughness (RMS) | ≤ 2 nm | – | Measured with interferometric profilometer |
| Reflectivity | ≥ 92 % (400‑1000 nm) for enhanced Al; ≥ 98 % (400‑1000 nm) for protected Ag | % | Average over clear aperture |
| Mounting Interface | M4 threaded holes, kinematic mounts, or custom flange | – | Defined per integration drawing |
| Weight | 0.2 – 2.5 | kg (depends on size & substrate) | – |
Applications in Industrial Metrology
In a structured‑light scanner, the mirror redirects the projected pattern onto the subject and collects the reflected light for camera capture. Any deviation in mirror flatness introduces phase errors that translate directly into point‑cloud noise. Therefore, the mirror’s surface figure must stay within a fraction of the wavelength of the illumination source (commonly 635 nm red lasers or 470 nm blue LEDs).
For laser‑triangulation systems, the mirror steers the laser line across the object at a known angle. Angular deviation caused by mirror tilt or substrate warp results in systematic distance errors. Low‑CTE substrates combined with kinematic mounting minimize these effects, allowing repeatability better than 10 µm over a 1 m scanning volume.
Beyond garment scanning, the same mirrors serve in automotive body‑in‑white inspection, aerospace component verification, and virtual‑try‑on platforms where sub‑millimeter accuracy is required.
Customization Options
- Substrate diameter or rectangular dimensions from 30 mm to 400 mm
- Shape: flat, spherical (concave/convex), or free‑form aspheric
- Coating wavelength optimization (visible, NIR, UV‑extended)
- Edge blackening or bevel to reduce stray light
- Mounting features: threaded inserts, kinematic balls, custom flange patterns
- Environmental sealing (IP‑65 rated housings) for harsh factory conditions
Quality Control and Inspection
Each mirror undergoes interferometric surface figure measurement using a Fizeau interferometer referenced to a λ/10 reference flat. The resulting PV and RMS values are recorded and compared against the project specification. Surface roughness is verified with a non‑contact optical profilometer, targeting ≤ 2 nm RMS over the clear aperture.
Reflectivity is measured with a spectrophotometer integrating sphere at multiple wavelengths (450 nm, 550 nm, 650 nm, 850 nm). Coating adhesion is tested via tape pull (ASTM D3359) and humidity cycling (85 % RH, 85 °C, 1000 h) to ensure no delamination or oxidation. Final inspection includes a 2‑D beam‑steer test where a collimated laser is scanned across the mirror; the deviation of the reflected beam is recorded to confirm angular accuracy within ±5 arc‑seconds.
Packaging and Logistics
Mirrors are first placed in anti‑static, low‑outgassing foam cushions that conform to the part geometry. The assembly is then sealed in a polyethylene bag with desiccant packs to control humidity. For export, the packaged units are loaded into ISPM‑15 compliant wooden pallets or reusable plastic crates, secured with shock‑watch indicators that trigger if acceleration exceeds 15 g. Each shipment includes a material test report (MTR) and a certificate of conformance (CoC).
Frequently Asked Questions
Can the mirror dimensions be customized to match our scanner’s optical layout?
Yes. Substrate size, shape, and mounting hole pattern are defined per customer drawing. We provide a CAD model for approval before tooling.
What information is required to generate a quotation?
Please supply the desired clear aperture, substrate material preference, coating wavelength range, mounting interface details, and any environmental constraints (temperature range, humidity, exposure to chemicals).
Which coating options are available for visible‑NIR applications?
We offer enhanced aluminum (Al+SiO₂) and protected silver (Ag+dielectric) coatings. Custom dielectric stacks can be developed for specific bands such as 900‑1700 nm.
How is quality inspected before shipment?
Every part undergoes interferometric figure measurement, profilometry roughness check, spectrophotometric reflectance test, adhesion and humidity cycling, and a final beam‑steer verification. Documentation includes MTR, CoC, and inspection data sheets.
What are the typical lead times for OEM orders?
Lead times depend on complexity and volume, typically ranging from 4 weeks for standard flat mirrors to 8‑10 weeks for custom aspheric or coated parts. Exact schedules are confirmed after quoting.