Zongtao Duan, Jian Zhang, Guoyu Zhang, Yangyang Zou, Zhengjie Niu, Bin Zhao, Xiaoxu Mo, Zhikun Yun, Jianliang Zhang, Jia Guo. Measurement of Reflected Light Field of Rough Surfaces Using Ultrawide-angle Imaging[J]. Acta Optica Sinica, 2023, 43(11): 1112002
- Acta Optica Sinica
- Vol. 43, Issue 11, 1112002 (2023)
Fig. 1. BRDF measurement principle
Fig. 2. Overall structure diagram of reflective light field measurement system
Fig. 3. Mathematical model of aspheric mirror
Fig. 4. Structural light path diagram of catadioptric panoramic imaging optical system
Fig. 5. Modulation transfer function curve
Fig. 6. Spot diagrams
Fig. 7. Simulated light array model of field angle resolution
Fig. 8. Angle distribution diagram of lamp array arrangement
Fig. 9. Illumination distribution map of angle resolution analogue image surface
Fig. 10. Off-axis spatial position mapping model
Fig. 11. Coordinate distribution of feature points after calibration
Fig. 12. Illumination distribution of image surface measured by Lambert light field
Fig. 13. Illumination distribution of image plane of Lambert light field after calibration
Fig. 14. Relative error of the circumference range under each zenith angle
Fig. 15. Measurement model of multi-angle reflected light field on rough surface
Fig. 16. Light intensity distribution of reflected light field from three rough surfaces. (a) Labsphere Permaflect-80 diffuse reflector; (b) WhiteOptics-DF60 diffuse reflector; (c) mirror aluminum plate
Fig. 17. BRDF curve of three kinds of rough surfaces in the incident plane. (a) Labsphere Permaflect-80 diffuse reflector; (b) WhiteOptics-DF60 diffuse reflector; (c) mirror aluminum plate
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