Fig. 1. Schematic diagram of intensity correlation interferometry for astral observation angle based on spatial modulation

Fig. 2. Two-mirror experimental scheme of intensity correlation interferometry for observation angle. (a) Experimental optical path; (b) light path geometric relationship

Fig. 3. Experimental results. (a) Intensity distribution on detector plane of optical path A; (b) intensity distribution on detector plane of optical path B; (c) calculation result of mutual correlation; (d) comparison of mutual correlation and autocorrelation calculation results

Fig. 4. Relationship between rotation angle and second-order correlation function under different modulator sizes

Fig. 5. Experimental results of thermal light. (a) Intensity distribution on detector plane of optical path A; (b) intensity distribution on detector plane of optical path B; (c) calculation result of mutual correlation

Fig. 6. Experimental result of intensity correlation interferometry for observation angle based on spatial modulation