Fig. 1. Model diagram and gap loss of S-CPC. (a) Cross-sectional view of physical model; (b) gap loss of S-CPC

Fig. 2. Construction of equal-length reflector

Fig. 3. Construction of reflective surface

Fig. 4. Physical model of CPC without gap loss

Fig. 5. Calculation flow chart of program

Fig. 6. 3D printing of CPC model without gap loss

Fig. 7. Laser verification experimental platform. (a) Schematic diagram of experimental platform; (b) physical picture of experimental platform

Fig. 8. Error analysis diagram of different incident angles

Fig. 9. Error analysis diagram of different incident positions. (a) Incident angle of 0°; (b) incident angle of 10°; (c) incident angle of 20°; (d) incident angle of 30°

Fig. 10. Structure of equal-length reflector. (a) Single pair of reflectors; (b) two pairs of reflectors; (c) three pairs of reflectors; (d) four pairs of reflectors; (e) five pairs of reflectors; (f) six pairs of reflectors

Fig. 11. Single side length of equal-length reflector

Fig. 12. Relationship between absorber radius and gap size

Fig. 13. Relationship between different angles

Fig. 14. Concentrating characteristics of equal-length reflector of CPC without gap loss. (a) Single pair of reflectors; (b) three pairs of reflectors; (c) five pairs of reflectors

Fig. 15. Visual optical performance of CPC without gap loss. (a) Incident angle of 15°; (b) incident angle of 40°; (c) incident angle of 50°