The advantages of free-form surface solutions mainly include the following aspects:
High degree of design freedom: The free-form surface can be optimized and designed according to specific optical requirements, giving it a higher degree of design freedom. Compared with traditional spherical or flat optical elements, freeform surfaces can flexibly adjust curvature and shape to meet complex optical needs.
Excellent optical performance: Free-form surfaces can significantly reduce aberrations and improve resolution and optical quality. By precisely controlling curvature and shape, freeform surfaces can achieve lower aberrations, higher resolution, and better optical effects.
System Compactification: Free-form surfaces help achieve compact design of optical systems. By designing and manufacturing complex free-form surfaces, more compact optical systems can be achieved, reducing overall volume and weight.
High light energy utilization and transmittance: For example, Nedjia's free-form diamond AR optical module has a high light energy utilization rate of 43% and a transmittance of 41%, with a comprehensive light efficiency of 84%, which can effectively reduce power consumption and improve the battery life of the device.
Thin and light design: In AR/VR equipment, free-form surface technology makes optical modules thinner and lighter. For example, Nedega's free-form diamond AR optical module reduces the thickness of the lens to less than 10mm, and the thickness of the module product equipped with an optical engine is reduced to less than 14mm, which greatly improves the wearing comfort.
Wide range of applications: Free-form surfaces are widely used in various optical devices, including lenses, mirrors, gratings, diffraction elements, optical prisms, etc. Its high degree of design freedom and excellent optical performance make it occupy an important position in optical systems.