Optics
What Is the Difference Between Waveguide and Pancake Optics?
Both are near-eye display optical solutions, but they differ clearly in how the real environment is viewed, terminal structure and suitable applications.
1. Core Judgment
If you want to view the real world directly through transparent optics, evaluate Waveguide first; if you want to view a complete image through the display, evaluate Pancake first.
2. Waveguide and Pancake Optics Overview
Waveguide
Adds digital information to the real world.
- See-through AR
- Lightweight
- Wide FOV; translucent; eye-box
- Smart glasses and industrial headsets
Pancake Optics
Forms an immersive virtual image in a compact structure.
- VR and video see-through AR/MR
- High image quality and brightness
- Balanced FOV, resolution and optical path length
- Immersive headsets
3. How the Two Approaches View the Real Environment
Waveguide (See-Through)
Real environment
···→
Transparent optical element + digital overlay
→
Human eye
Pancake Optics (Immersive)
Real environment
→
Camera
→
Image processing & rendering
→
Display + Pancake Optics
→
Human eye
4. Key Differences
| Comparison Dimension | Waveguide (See-Through) | Pancake Optics (Immersive) |
|---|---|---|
| Viewing Method | Directly view the real world through transparent optics | View a complete image through the display |
| Primary Use Cases | Information overlay, navigation, alerts, industry, enterprise, industrial | Immersive experiences, entertainment, simulation training, professional applications |
| Typical End Products | Smart glasses, industrial headsets, enterprise headsets | VR headsets, immersive AR/MR headsets |
| Display Content | Digital overlay on a transparent view of the real world | Complete digital screen (video, 3D, virtual content) |
| System Complexity | Lower: optical element and light engine | Higher: camera, SoC, optical path, image processing |
| Image Routing | Through transparent optics + eye-box (see-through) | Camera capture → processing → display → Pancake Optics → eye |
| Suitability in Real Environments | Better for comfort and awareness in bright environments | Depends on FOV, brightness and optical performance |
| Image & Visual Experience | See-through + digital overlay in real time | Immersive image quality and depth |
| Equipment Footprint | Smaller and lighter | Larger and heavier |
5. Pengsheng MicroVision Solution Parameters
DP-002 + OP-001 | Waveguide
- Display Size: 0.23"
- Resolution: 640 × 400
- FOV: 26°
- See-through: > 80%
- Eye-box: 0–700 nits adjustable
- Weight: 10 × 8 mm
- Module Weight: < 13 g
DP-012 + OP-002 | Pancake Optics
- Display Size: 0.71"
- Resolution: 1920 × 1080
- FOV: Approx. 60°
- Eye Relief: 16.2 mm
- Module Weight: 15.4×
- Output: Φ5 mm / 18 mm
- FOV (Diagonal): 26.9 mm
- Distortion: ≤ 1%
- See-through: > 90%
6. Project Selection Recommendations
How do you view the real environment?
View directly through Waveguide
Suitable for combining with real environments. Recommended for digital overlays, requires consideration of environmental factors, terminal structure and main control interface.
View a complete image through the display with Pancake Optics
Suitable for immersive experiences and complete screen viewing. Recommended for scenarios requiring image quality, optical performance, terminal structure and main control interface.
7. References
- DigiLens: Waveguide Optics
- Vuzix: See-Through Waveguide Displays
- Kopin: Pancake Optics