Precision Light Control: A Case Study on Micro-Prism Technology

This case study investigates the development and application of micro-prism optical components, focusing on their role in precisely manipulating light within various optical systems. These micro-prisms, made from materials such as glass and plastics, are essential in devices like laser technologies, imaging systems, and sensors.

The study had three main objectives: to develop highly accurate micro-prism lenses compatible with various optical setups, to improve manufacturing processes for enhanced quality and cost efficiency, and to partner with customers to provide tailored optical solutions.

Key accomplishments include the creation of high-performance lenses, the application of advanced fabrication and coating techniques, and thorough alignment testing to ensure precision. This case study marks a significant advancement in optical technology, providing tailored solutions for enhanced light control.

Understanding Micro-Prisms

Micro-prisms are transparent, small optical components that precisely manipulate light at small scales. Their finely crafted surfaces allow for specific reflection and refraction of light, making them essential in various applications such as laser systems, imaging devices, and optical sensors.

Micro-prisms are made to control light direction and behavior on a microscopic level, permitting functions like collimating, focusing, and dispersing light. Their compact form factor enables integration into miniaturized devices, including projectors, medical equipment, and digital cameras.

In digital and smartphone cameras, micro-prisms enhance image quality by improving focusing abilities and correcting optical aberrations. They are also crucial in laser systems, performing beam shaping and alignment tasks.

Case Study Objectives

This case study, led by Shanghai Optics in collaboration with a customer, focused on developing and producing micro-prism lenses for a range of optical applications.

Precision Light Control: A Case Study on Micro-Prism Technology

Image Credit: Shanghai Optics

The project had several key objectives:

  • High Precision and Performance: Develop micro-prism lenses that meet the strict performance requirements of various optical systems.
  • System Compatibility: Ensure the lenses are compatible with a wide range of optical devices, offering versatility and ease of integration.
  • Manufacturing Optimization: Refine manufacturing processes using advanced micro-nano fabrication and coating techniques to maintain high quality while controlling costs.
  • Customer-Centric Solutions: Work closely with customers to provide customized optical solutions tailored to specific application needs and requirements.

Micro-Prism Specifications

  • Material: Schott N-LASF, Ohara S-LAH
  • Dimensions: 2.5 x 2.5 x 2.5 mm
  • Coating: High-reflective coating (Rav 95 % mirror, S1) and anti-reflective coating (Rav < 0.8 % @ 450-1000 nm) 

Fabrication Process

Anti-Reflective Coatings: A multilayer film stack technology was employed to reduce reflection losses. This method involved depositing thin films with varying refractive indices, optimized through optical thin-film design software for precise control over coating thickness.

Assembly and Testing: Automated assembly equipment and precision handling under microscopes were employed to guarantee accurate alignment and secure assembly of the delicate optical components. Rigorous testing with specialized measurement devices confirmed that the lenses met all specifications.

Micro-Fabrication Techniques: Advanced micro-nano fabrication methods, including laser cutting and precision CNC machining, were necessary to achieve the required micro-prism dimensional accuracy.

High-Reflective Coating Application: Advanced vacuum deposition technologies, including PVD and CVD, were employed to apply the high-reflectivity coatings, which are crucial for achieving the necessary optical performance.

Conclusions

The successful production of micro-prism lenses is a significant achievement in optical technology. Innovative approaches, customer collaboration, and optimization of manufacturing processes enabled the project presented here to successfully address the challenges involved in producing high-quality micro-prism lenses.

This advancement meets current optical needs and provides a foundation for future developments in light manipulation technologies.

This information has been sourced, reviewed and adapted from materials provided by Shanghai Optics.

For more information on this source, please visit Shanghai Optics.

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