Design of ultra-short throw ratio lens using annularly stitched aspheric surface

Hailong Chen; Dewen Cheng; Yongtian Wang

doi:10.1117/12.2606174

24 November 2021 Design of ultra-short throw ratio lens using annularly stitched aspheric surface

Hailong Chen, Dewen Cheng, Yongtian Wang

Proceedings Volume 12063, AOPC 2021: Display Technology; 1206308 (2021) https://doi.org/10.1117/12.2606174
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

Stitched surfaces have the advantages of high degrees of freedom and flexibility, which can improve the performance of imaging optical system while reducing volume and weight. In this paper, a new type of surface, called annularly stitched aspheric surface (ASAS), is demonstrated. Firstly, the definition of ASAS is given, and it meets the C1 continuity condition. Then, a high-precision conversion method from traditional aspherical surface to ASAS is proposed to establish the initial system with this novel surface. The optimization strategy and implementation method are explained. Special constraints that are needed when optimize the system with ASAS is also mentioned. Finally, the ASAS is applied to the design and an ultra-short throw (UST) ratio projector objective lens is optimized. The total length of the optimized system is only 155mm, the maximum distortion value is only 1.36%, and MTF value of full field of view at 66lp/mm is higher than 0.3. The result shows that this new surface type can increase the degrees of freedom and flexibility to optical system, verifying the feasibility of ASAS.

Citation Download Citation

Hailong Chen, Dewen Cheng, and Yongtian Wang "Design of ultra-short throw ratio lens using annularly stitched aspheric surface", Proc. SPIE 12063, AOPC 2021: Display Technology, 1206308 (24 November 2021); https://doi.org/10.1117/12.2606174

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KEYWORDS

Distortion

Objectives

Aspheric lenses

Modulation transfer functions

Mirrors

Lens design

Projection systems

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