Fig. 1. Equivalent process of rigid body motion of mirror unit from ideal position to deformed position 1. (a) Translational motion; (b) rotational motion around point T_1t; (c) rotational motion around T_1tT_3t axis

Fig. 2. Schematic diagrams of integration of optical and deformation information using planar elements. (a) Mirror surface is discreted into a large number of planar elements; (b) mirror surface deformation; (c) optical and deformation information of planar elements

Fig. 3. Optical design parameters of equal-intensity reflection solar concentrator system with pleated plate

Fig. 4. Simulation results obtained by OptisWorks software. (a) Ray transmission path; (b) flux density distribution of focused spot

Fig. 5. Experimental device of designed solar concentrator system. (a) 3D model; (b1)-(b4) fixed structure of the plane mirror

Fig. 6. Solar radiation luminance distributions on rough white paper under different shooting angles. (a)(b) Rough white paper surfaces at different shooting angles;(c) distribution of gray value after processing for Fig. 6(a); (d) distribution of gray value after processing for Fig. 6(c)

Fig. 7. Experiments of flux distribution measurement of solar concentrating system. (a) Unloaded condition; (b) loaded condition

Fig. 8. Grayscale images of focused spot under unloaded and loaded conditions. (a)(b) Unloaded conditions; (c)(d) loaded conditions

Fig. 9. Established finite element model of solar concentrator. (a) Finite element model with divided meshs; (b) boundary conditions

Fig. 10. Slope error distributions of concentrator mirror under load. (a)(b) Total slope error and slope error along y-axis direction calculated by planar element substitution method; (c)(d) total slope error and slope error along y-axis direction calculated by mirror pose reconstruction method

Fig. 11. Total slope error distributions of mirror element under different optical-mechanical integration calculation methods. (a) Planar element substitution method; (b) mirror pose reconstruction method

Fig. 12. Flux distributions of planar receivers in concentrator system calculated by different methods under different working conditions. Flux distributions obtained by (a) OptisWorks software and (b) planar element substitution method under ideal condition; flux distributions of (c) planar element substitution method and (d) mirror pose reconstruction method under loaded condition

Fig. 13. Comparison between experimental measurement results and optical-machine integration calculation results. (a) Under unloaded condition; (b) under loaded condition