Application of multilayer diffractive optical elements in micro-projection system

Lin Wang; Tianyu Liu; Feng Xu

doi:10.1117/12.2644371

9 September 2022 Application of multilayer diffractive optical elements in micro-projection system

Lin Wang, Tianyu Liu, Feng Xu

Proceedings Volume 12328, Second International Conference on Optics and Image Processing (ICOIP 2022); 123280F (2022) https://doi.org/10.1117/12.2644371
Event: Second International Conference on Optics and Image Processing (ICOIP 2022), 2022, Taian, China

Abstract

An image telecentric micro-projection system based on multilayer diffractive optical elements (MLDOE) has been designed for portable device. It consists of 0.26-inch Liquid Crystal on Silicon (LCOS), the polarization beam splitter (PBS) and hybrid refractive/diffractive eyepieces. The system has a focal length of 9.75 mm, a field of view of 40°, an entrance pupil diameter of 4 mm, and works in the visible light. The diffractive structure contained in it is a double-layer separated diffractive optical elements with an angle-band integral average diffraction efficiency (ABIADE) of 98.9% at an incident angle of 0-15° and working wavelength of 400-700 nm. The Modulation Transfer Function (MTF) of the system is better than 0.5 at 100 lp/mm, the distortion is less than 2%, the imaging quality is excellent, and the maximum diameter is 9.6 mm, the total length is 24.2 mm, and the weight is 2.37 g. It has the advantages of compact structure and light weight, and is satisfied with the miniaturization of the micro-projection system demand.

Citation Download Citation

Lin Wang, Tianyu Liu, and Feng Xu "Application of multilayer diffractive optical elements in micro-projection system", Proc. SPIE 12328, Second International Conference on Optics and Image Processing (ICOIP 2022), 123280F (9 September 2022); https://doi.org/10.1117/12.2644371

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