Yupeng HUANG, Hongxin ZHANG, Yue DING, Taisheng WANG. Determination and Experimental Study of Three Kinds of Stray Light in the Coronagraph System[J]. Acta Photonica Sinica, 2023, 52(11): 1122003
- Acta Photonica Sinica
- Vol. 52, Issue 11, 1122003 (2023)
Fig. 1. Experimental principle of coronagraph imaging detection
Fig. 2. Working principle of inner-occulted coronagraph（the green part shows the sun's corona light path）
Fig. 3. Simulation architecture of coronagraph system（non-equal ratio scale）
Fig. 4. Suppression principle of the diffraction from the objective and the secondary reflection ghost point
Fig. 5. The position of the point source for simulating the aperture diffraction
Fig. 6. The propagation path of the simulated diffracted light in the optical system
Fig. 7. Diagram of multiple reflection of sunlight in objective O1
Fig. 8. The first image plane and ghost point of the second reflection on the inner surface of the objective
Fig. 9. Diagram of ghost location and its effect on the image plane
Fig. 10. Scattering point simulation diagram of coronagraph objective
Fig. 11. Diagram of imaging position of scattering points in coronagraph objective and its effect on image plane
Fig. 12. Experimental apparatus for coronagraph detection
Fig. 13. Picture of a ghost image plane
Fig. 14. Comparison of stray light before and after blocking the ghost image
Fig. 15. Scattering point imaging with the coronagraph objective
Fig. 16. Schematic diagram for the equivalent system position relationship for the three stray light types of the coronagraph
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Table 1. Determination and comparison of three kinds of stray light
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