Quan Zhang, Xin Li, Yanna Zhang, Wenchao Zhai, Enchao Liu, Xiaobing Zheng. Opto-Mechanical Design of Unattended Irradiance Spectroradiometer in Reflective Solar Bands[J]. Acta Optica Sinica, 2019, 39(3): 0323002
- Acta Optica Sinica
- Vol. 39, Issue 3, 0323002 (2019)
Fig. 1. Overall design plan of irradiance spectroradiometer in reflective solar bands
Fig. 2. Measurement schematic. (a) Full irradiance measurement; (b) diffuse irradiance measurement
Fig. 3. Schematic of irradiance spectroradiometer in reflective solar bands. (a) 3D structure diagram; (b) optical path brief diagram
Fig. 4. Design sketch of front optical system
Fig. 5. Overall schematic of fiber bundle
Fig. 6. Curves of relation between transmission efficiency and length of fiber bundle[19]
Fig. 7. Schematic of VIS module. (a) Optical path diagram; (b) 3D simulation diagram
Fig. 8. Schematic of NIR module. (a) Optical path diagram; (b) 3D simulation diagram
Fig. 9. Schematic of SWIR module. (a) Optical path diagram; (b) 3D simulation diagram
Fig. 10. Light path diagram of four quadrant tracker
Fig. 11. Schematic of parallelogram in measuring institution
Fig. 12. Field observation. (a) Equipment photo; (b) field environment
Fig. 13. Curve of measured full-day solar direct irradiance
Fig. 14. Comparison of cosine curve measured in lab with standard cosine curve
Fig. 15. Measurement results of irradiance. (a) Zenith angle of 60°, a.m.; (b) zenith angle of 40°, a.m.; (c) zenith angle of 40°, p.m.; (d) zenith angle of 60°, p.m.
Fig. 16. Ratio data comparison between irradiance spectroradiometer and SVC in synchronous measurement. (a) Data comparison; (b) deviation
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Table 1. Parameters of front optical system
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