Abstract

Ultrashort throw projector (UTP) technology has been a challenging research focus in the fields of large field of view and short-distance projection. In this paper, we propose a design method for a curved-target UTP based on image precorrection. A predistortion method (${\lt}{1}\;{\rm pixel}$) using a radial basis function is presented to effectively correct irregular distortion. A grayscale precorrection method is used to address uneven illumination distribution. We provide a UTP design example and verify the correction methods using two different curved targets (aspherical and freeform), demonstrating effective distortion correction (${\lt}{1}\%$) and illumination uniformity (${\gt}{90}\%$). The structure similarity index measure for the projection images shows close or greater than 0.9 correlation.

© 2023 Optica Publishing Group

Design and engineering verification of an ultrashort throw ratio projection system with a freeform mirror

Baihua Yu, Zhihui Tian, Dongqi Su, Yongxin Sui, and Huaijiang Yang
Appl. Opt. 58(13) 3575-3581 (2019)

Field curvature correction method for ultrashort throw ratio projection optics design using an odd polynomial mirror surface

Zhenfeng Zhuang, Yanting Chen, Feihong Yu, and Xiaowei Sun
Appl. Opt. 53(22) E69-E76 (2014)

Multifield direct design method for ultrashort throw ratio projection optics with two tailored mirrors

Yunfeng Nie, Rubén Mohedano, Pablo Benítez, Julio Chaves, Juan C. Miñano, Hugo Thienpont, and Fabian Duerr
Appl. Opt. 55(14) 3794-3800 (2016)

Design of a panoramic annular lens system with an ultra-wide angle via an annular Gaussian radial basis function freeform surface

Yingzhe Yang, Jia Wang, Yuejia Li, and Jian Bai
Appl. Opt. 62(15) 3941-3947 (2023)

Ultra-thin multifocal integral LED-projector based on aspherical microlens arrays

Yue Liu, Dewen Cheng, Tong Yang, Hailong Chen, Luo Gu, Dongwei Ni, and Yongtian Wang
Opt. Express 30(2) 825-845 (2022)