A double-sided lens array is a special type of optical element that has lens structures on both surfaces. Here are some characteristics and application scenarios of double-sided lens arrays:

Characteristics:

• Dual Focus Function: Double-sided lens arrays can independently focus light in two directions, providing more precise beam control.

• High Integration: These arrays can be integrated into a compact space to achieve complex optical functions.

• Beam Shaping: Double-sided lens arrays can be used to shape beams, such as transforming an elliptical beam into a circular one.

• Beam Diffusion: They can diffuse or expand beams, increasing the uniformity of illumination or coverage area.

• Adjustable Optical Performance: By design, the focal length, shape, and size of the lenses can be adjusted to meet specific optical needs.

• Material Diversity: Double-sided lens arrays can be manufactured from a variety of materials, such as polymers, glass, or crystals.

Application Scenarios:

• Digital Imaging: In imaging systems, double-sided lens arrays can be used to improve image quality, especially in high-resolution imaging applications.

• Laser Processing: In the field of laser micro-machining, they are used to focus the laser beam, achieving high-precision cutting or welding.

• Microfluidic Systems: In microfluidic chips, double-sided lens arrays can serve as micro-optical elements for manipulating and analyzing tiny fluids.

• Optical Sensors: In sensor technology, they can enhance the sensitivity and selectivity of sensors.

• Optical Communication: Double-sided lens arrays can act as wavelength selectors or beam shapers in optical communication systems.

• Biomedical Engineering: In biomedical imaging and therapy, they can be used to precisely manipulate and transmit light energy.

• Integrated Optics: In integrated optical chips, double-sided lens arrays can serve as key components to achieve a variety of optical functions.

The manufacturing of double-sided lens arrays typically involves multiple steps and processes, including the creation of a photomask, applying photoresist, photolithography, exposure and development, etching, and photoresist removal. This complex manufacturing process ensures the high precision and consistency of double-sided lens arrays, enabling them to function in various high-end applications.

Double-sided fly-eyes

Material	High Purity Silica Glass/quartz
Transmittance	Material 92 % / AR Coating 98 % (applicable range 360 - 500 nm)
Maximum temperature resistance	1,000 °C
Surface quality	Defined according to customer needs (detailed evaluation of design drawings)
Dimensions range	5 x 5 - 30 x 30 (unit: mm)
Dimensional tolerance	+- 0.10 mm
Thickness tolerance	+- 0.05 mm
Minimum cell size	0.15x 0.15(unit: mm)
Cell size tolerance	+- 0.02 mm
Dead zone area width	< 0.03 mm
Radius of array cell	Customized (detailed evaluation of design drawings)
Radius deviation	< 3 %
Alignment accuracy	+- 0.02 mm

Lens arrays

Material	H-K9、H-K51、Borosilicate
Transmittance	AR Coating 98 %
Maximum temperature resistance	400 °C
Surface quality	60-40/80-50(S/D) ISO99211
Dimensions range	10x 10 - 90 x 90 (unit: mm)
Dimensional tolerance	+- 0.10 mm
Thickness tolerance	+- 0.05 mm
Minimum cell size	0.5 x 0.5(unit: mm)
Cell size tolerance	+- 0.02 mm
Dead zone area width	< 0.05 mm
Radius of array cell	Customized (detailed evaluation of design drawings)
Radius deviation	< 3 %