What is a Microlens Array?
A microlens array is an arrangement of tiny lenses, often just tens to hundreds of micrometers in diameter, that are precisely patterned on a substrate. These arrays are used to focus, collect, diffuse, or redistribute light, offering benefits in imaging systems, laser beam shaping, and optical sensors.
At Bote, we offer custom-designed microlens arrays to meet the unique needs of research institutions and industrial customers. With precision optical fabrication and flexible design services based in Singapore and China, we provide high-quality solutions with international export capability.
Types of Microlens Arrays
1. Square Microlens Array
- Designed in a grid format
- Suitable for uniform light sampling
- Common in CCD/CMOS sensor enhancement
Applications:
Laser beam homogenization, light field imaging, display enhancement.
2. Cylindrical Microlens Array
- Uses cylindrical geometry instead of spherical
- Focuses light in one dimension
- Ideal for line scanning and laser diode collimation
Table: Comparison of Square vs Cylindrical Microlens Arrays
| Feature | Square Microlens Array | Cylindrical Microlens Array |
|---|---|---|
| Focus Direction | 2D (x and y axes) | 1D (x or y axis) |
| Use Case | Imaging, displays | Laser line generation |
| Complexity | Moderate | High |
Microlens Array Imaging
Microlens arrays play a key role in plenoptic cameras and 3D imaging systems. By placing the array in front of an image sensor, each microlens captures a slightly different perspective of the scene, allowing for depth estimation and digital refocusing.
Benefits:
- Enhanced depth perception
- Real-time 3D reconstruction
- Efficient light collection
Microlens Array Fabrication Techniques
The manufacturing of microlens arrays requires submicron accuracy. Common methods include:
- Photolithography: For precise shape control
- Thermal Reflow: Cost-effective and widely used for polymer lenses
- Etching on Silicon or Glass: High durability and thermal resistance
At Bote, we offer:
- Custom pitch and curvature radius
- High-uniformity arrays
- Materials: Glass, polymer, and silicon substrates
Zemax Simulation for Microlens Arrays
Before fabrication, microlens arrays are designed and optimized using optical simulation software such as Zemax.
We support Zemax modeling to:
- Simulate optical performance
- Optimize focal length and NA
- Avoid spherical aberration
If you’re designing a new optical system, we can provide Zemax files or work directly with your team to ensure performance meets your criteria.
Microlens Array Diffuser
Microlens arrays can also act as diffusers for LED light sources and laser applications. They can break up a collimated beam into a controlled illumination pattern.
Advantages:
- Non-Gaussian light shaping
- Custom angular spread
- Excellent for machine vision lighting
Plastic vs Silicon Microlens Arrays
| Feature | Plastic Microlens Array | Silicon Microlens Array |
|---|---|---|
| Cost | Low | Higher |
| Optical Clarity | Good in visible range | Excellent in infrared (IR) range |
| Thermal Stability | Low | Very High |
| Fabrication Method | Injection molding or reflow | Etching and photolithography |
At Bote, we support both cost-effective polymer arrays and high-performance silicon microlens arrays, depending on your application.
Why Choose Bote for Microlens Arrays?
As an optical manufacturer with facilities in Singapore and Nanjing, China, Bote provides:
- Custom Design Services: Tailored microlens geometries, materials, and coatings
- Fast Prototyping: Quick turnaround on small-batch orders
- Advanced Metrology: Surface profiling, focal length testing, and interferometry
- Export-Friendly: We handle global shipping and compliance
Whether you’re developing a new optical device or improving an existing one, Bote can help you achieve better performance and faster development cycles.
Common Applications of Microlens Arrays
- Autonomous Vehicles: LiDAR systems
- Augmented Reality (AR): Display enhancement
- Optical Communications: Fiber coupling
- Biomedical Imaging: Miniaturized endoscopes
- Solar Panels: Light focusing
Get Started with a Custom Quote
We offer technical support, simulation, prototyping, and volume production. Upload your drawing or contact us via www.bote.com.sg/contact for a customized microlens array solution.
Inspection Equipment List and Metrology of Bote Optics