Microlens & Microlens Array: Key Technical Specifications & Industrial Applications

A microlens refers to tiny optical lenses with micron-scale apertures. A microlens array (MLA) consists of numerous microlens units arranged periodically. With the advantages of miniaturization, lightweight structure and parallel optical processing, microlenses are essential micro-optical components widely deployed in optoelectronic industries.

Key Technical Parameters

1.Aperture: Clear aperture of single lenslet, ranging from 20μm to 10mm. Custom shapes available: circular, square, rectangular and cylindrical.

2.Pitch: Center-to-center distance of adjacent lenslets, which defines array density. Tolerance can reach ±0.5μm.

3.Radius of Curvature: Surface curvature determining focal length. Spherical and aspherical profiles are manufacturable.

4.Effective Focal Length (EFL): Typical range from 0.05mm to 20mm, focal length tolerance ±1%.

5.Numerical Aperture (NA): Optional 0.1~0.45. Higher NA delivers stronger light collection capacity and smaller focal spot.

6.Sag Height: Vertical height from lens apex to substrate base, related to aperture and curvature radius.

7.Substrate Material: Optical glass, fused silica, chalcogenide glass, supporting visible, near-infrared, mid-wave and long-wave infrared bands.

8.Surface Roughness: Rq <10nm. Premium parts achieve sub-nanometer roughness to reduce light scattering loss.

9.Optical Coating: Anti-reflection (AR) coating, average reflectance ≤1.25% at target wavelength.

10.Surface Figure: Wavefront error, PV and RMS figure, capable of diffraction-limited imaging performance.

Main Application Fields

1.Light Field Imaging: Light field cameras and microscopic light field systems, supporting post-capture refocusing for 3D reconstruction.

2.Laser Shaping & Beam Homogenization: Converts Gaussian beam into uniform flat-top spot for diode laser and laser illumination systems.

3.Machine Vision & 3D Sensing: Structured light projector, ToF sensor and face recognition modules for consumer electronics.

4.Optical Communication: VCSEL collimation, fiber coupling and beam splitting to improve optical coupling efficiency.

5.Medical Optics: Miniature imaging probes and endoscopes to shrink the dimension of optical heads.

6.Automotive Optics: Automotive perception sensors, HUD and backlight homogenization.

7.Display Industry: AR/VR optics, backlight units and projection display systems.

Summary

Microlens arrays break the limits of traditional optical systems with compact size and parallel optical processing. We provide customized solutions including optical design, prototyping and mass production. Substrate, surface profile, coating and array dimension can be customized according to your optical requirements.