Design of off-axis three-mirror freeform optical system with wide field of view

Ni, Dongwei; Li, Xuyang; Ren, Zhi-guang; Wang, Yuming; Wang, Lei; Tian, Chunlin

doi:10.1117/12.2504915

Cited by 2 publications

(4 citation statements)

References 4 publications

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“…However, because its structure is very flexible, the eccentricity of a small distance or the adjustment of a small angle of rotation may bring about problems in the optimization process, such as structural occlusion. Inspired by the research on the off-axis three-reverse control occlusion method [13], as shown in Figure 6 below, by controlling the height of the light at the edge of the adjacent surface in the optimization process, the light occlusion problem in the optimization process can be prevented. The constraint conditions can be expressed as follows:…”

Section: Anti-occlusion Optimization Methods Based On the Off-axis Tr...mentioning

confidence: 99%

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Initial Structure Design and Optimization of an Automotive Remote Head-Up Display

Ye,

Chen,

Wang

2023

Applied Sciences

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Aiming at the problems of difficult construction and occlusion of the initial structure of an automotive augmented reality head-up display (AR-HUD), a method to quickly build the initial structure of an automotive AR-HUD is proposed. Firstly, the position of the mirrors in the initial structure is calculated based on the Rodrigues rotation formula. Secondly, the position of the mirrors is restricted by constraints during optimization to prevent the problem of structural occlusion. Finally, a virtual image display system with a visual distance of 7.5 m and a field of view angle of 10° × 5° is designed. The image quality analysis of the optimized system shows that the light spots in each field of view are all within Airy spots. At the spatial cutoff frequency of the virtual image plane of the optical system, the modulation transfer function (MTF) value of the full field of view is basically greater than 0.5, and the distortion is less than 1%. Finally, using the image for simulation, the results of the simulation image are satisfying, which proves the validity and feasibility of the structural design. It provides a useful reference for the structural design of the remote head-up display system.

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Section: Anti-occlusion Optimization Methods Based On the Off-axis Tr...mentioning

confidence: 99%

“…The windshield point cloud data of a certain vehicle is extracted by LiDAR, and then the obtained data are fitted in Matlab using Formula (13). The windshield data after fitting is shown in Table 2.…”

Section: Design Examplementioning

confidence: 99%

Initial Structure Design and Optimization of an Automotive Remote Head-Up Display

Ye,

Chen,

Wang

2023

Applied Sciences

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Section: Optical System Designmentioning

confidence: 99%

“…The initial configuration of the TMCS that was used in this study is shown in Figure 1. The calculation method for the initial configuration of the TMCS was based on the third-order aberration theory, which has been introduced in many literature references [25][26][27] and is not discussed in detail here. Two common forms of TMAS are applied in the optical remote sensing domain: relayed TMAS, shown in Figure 2a, and nonrelayed TMAS, shown in Figure 2b.…”

Section: Optical System Designmentioning

confidence: 99%

Design of a Large Field of View and Low-Distortion Off-Axis Optical System Based on a Free-Form Surface

Jia

et al. 2023

Photonics

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Free-form surfaces have good aberration correction capability and balance capability for nonrotationally symmetric imaging systems. In this study, we analyzed the quantitative relationship between X–Y polynomial combination and aberration for the efficient design of X–Y free-form optical systems. The purpose of this study was to provide an exhaustive design method for off-axis triple inverse optical systems with X–Y free-form surfaces. Finally, we designed a free-form off-axis optical system with a large field of view (FOV) and low distortion based on the off-axis triple inverse optical system without an intermediate image plane. The primary mirror (PM) of the system adopted an X–Y polynomial free-form surface to correct the aberration of different FOVs of the system and improve the image width and quality. The optical system had a focal length of 1000 mm, an F-value of 9.5, an FOV angle of 23° × 1°, a maximum distortion grid in the FOV less than or equal to −0.05%, and a full-field average wave aberration better than 0.055 λ (λ/18.2, λ = 632.8 nm). The analysis of the design results showed that the system had high-quality imaging and a compact structure. This design method can provide a technical reference for the study of such free-form off-axis systems.

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Design of off-axis three-mirror freeform optical system with wide field of view

Cited by 2 publications

References 4 publications

Initial Structure Design and Optimization of an Automotive Remote Head-Up Display

Initial Structure Design and Optimization of an Automotive Remote Head-Up Display

Design of a Large Field of View and Low-Distortion Off-Axis Optical System Based on a Free-Form Surface

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