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AQWP2 Achromatic Quarter Waveplate
Active Range: 410 nm – 640 nm | Compact Visible QWP | Lowest Cost | ±0.02 waves | Doc: BVO.AQWP2.PB.202401
410–640 nm
Lowest Cost QWP
λ/4 Achromatic
99% Transmittance
Off-Shelf $495
AQWP2 is BVO's lowest-cost broadband visible achromatic quarter waveplate, covering 410–640 nm. A single modified polymer film at just 0.07mm thick — same quarter-wave retardance function as the AQWP3 but with a narrower bandwidth and lower price. Ideal for micro display manufacturers needing to miniaturize wearable products and for optical isolation in compact display systems where the full 400–750 nm range of AQWP3 is not required.
AQWP2 vs AQWP3: Same λ/4 achromatic function. AQWP2 covers 410–640 nm at lower cost; AQWP3 covers 400–750 nm with tighter ±0.01 wave tolerance. Choose AQWP2 when cost is the priority and the 410–640 nm range is sufficient. Choose
AQWP3 for full visible coverage or tighter tolerance.
±0.02 waves
Retardance Tolerance
AQWP2 — Retardance vs Wavelength
Active Range: 410–640 nm | Target: 0.2500 waves (λ/4) | Tolerance: ±0.02 waves (0.230–0.270) | Data: 2023 measurement
Key Features
- Lowest cost broadband visible QWP in the BVO line — cost-effective alternative to AQWP3
- Active range 410–640 nm — covers core visible LED and display wavelengths
- Single modified polymer film — only 0.07mm thick, ideal for miniaturized systems
- ±0.02 waves retardance tolerance across active range
- 99% internal transmittance — minimal insertion loss
- Large clear aperture — 25.4mm OD standard (20mm clear), to 100mm OD custom
- Wide acceptance angle ±15°
- BBAR anti-reflection coated — 400–900 nm R ≤ 0.65% per surface (component)
- PSA conversion available for direct lamination to display substrates
- Custom cutting — .dxf routing, die cutting, OEM wafer slicing
- Off-shelf 25.4mm OD at $495 each
Standard Component Specifications (Glass Laminated)
| Parameter | Value |
|---|
| Retardance | λ/4, achromatic 410–640 nm |
| Retardance Tolerance | ±0.02 waves |
| Birefringent Material | Modified polymer, sandwiched between BK-7 substrates |
| Substrates | BK-7, grade-A, fine annealed |
| Surface Quality | 40-20 Scratch-Dig |
| AR Coating | BBAR 400–900 nm, R ≤ 0.65% per surface average |
| Outer Diameter | 25.4mm OD ± 0.20mm |
| Clear Aperture | 80% (20mm) |
| Thickness | 6.1mm ± 0.20mm |
| Acceptance Angle | ±15 degrees |
| Optic Axis Stability | ≤2 degrees |
| Wavefront Distortion | λ/4 at 632nm |
| Beam Deviation | 2 arc minutes |
| Temperature Range | −20°C to 60°C |
| Damage Threshold | 500 W/cm² CW | 0.3 J/cm² @ 10ns, 523nm |
| Internal Transmittance | 99% |
| Off-Shelf Price | $495 each, 25.4mm OD |
Film Specifications
| Parameter | Value |
|---|
| Birefringent Material | Modified polymer |
| Film Thickness | 0.07mm (70 microns) |
| Surface Quality | 60-40 Scratch-Dig |
| Index of Refraction | 1.58 |
| Optional AR Coating | R ≤ 0.75% per surface average, 400–700 nm |
| PSA Conversion | Available |
| Film Cut Tolerances | ±50 microns |
| Environmental | 60°C at 90% RH for 1000h | 80°C dry 1000h | −30°C dry 1000h | −20°C to 75°C thermal cycling ×100 |
| Custom Cutting | .dxf routing/cutting, die cutting, OEM wafer slicing |
| Maximum Dimension | Contact BVO for quote |
Applications
Micro Display / WearablesUltra-thin 0.07mm film ideal for miniaturized wearable display products, AR glasses, and compact micro display optical systems where form factor is critical.
Display Optical IsolationCircular polarization for optical isolation in display systems across the 410–640 nm core visible range. Cost-effective for high-volume display OEM integration.
Circular Polarization GenerationConverts linearly polarized light to circular polarization across 410–640 nm. Covers blue, green, and red LED wavelengths used in display and illumination systems.
OEM Volume ApplicationsLowest cost broadband QWP for cost-sensitive OEM volume applications. PSA conversion and custom die cutting for direct lamination to display panels.
Contact Bolder Vision Optik
