Author Affiliations
1 National Astronomical Observatories/Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences, Nanjing, Jiangsu 210042, China;2 Key Laboratory of Astronomical Optics & Technology, Chinese Academy of Sciences, Nanjing, Jiangsu 210042, China;3 University of Chinese Academy of Sciences, Beijing 100049, Chinashow less
Fig. 1. Schematic of non-redundant aperture masking technique
Fig. 2. Schematic of closure phase
Fig. 3. Simulation images. (a) Golay-6 sub-aperture distribution; (b) PSF of system; (c) MTF of system
Fig. 4. Closure phase as a function of binary-star contrast ratio and angular separation. (a) Rc=0.1, δA=0.71λ/D; (b) Rc=0.1, δA=1.41λ/D; (c) Rc=0.1, δA=2.12λ/D; (d) Rc=0.01, δA=0.71λ/D; (e) Rc=0.01, δA=1.41λ/D; (f) Rc=0.01, δA=2.12λ/D; (g) Rc=0.001, δA=0.71λ/D; (h) Rc=0.001, δA=1.41λ/D; (i) Rc=0.001, δA=2.12λ/D
Fig. 5. Experimental light path
Fig. 6. Images collected by CCD in experiment. (a) Binary-star image before inserting mask; (b) PSF of system; (c) binary-star image after inserting mask
Fig. 7. Closure phases of point light source in experiment
Fig. 8. Fitting curve of a group of binary-star parameters
Group | Binary-starcontrast ratiocalculation value | Binary-starcontrast ratiocalibration value | Error ofcontrastratio | Calculationvalue of angularseparation /(″) | Calibrationvalue of angularseparation /(″) | Error ofangularseparation |
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1 | 0.530 | 0.520 | 1.92% | 73.385 | 75.261 | -2.49% | 2 | 0.081 | 0.085 | -4.71% | 73.979 | 75.261 | -1.70% | 3 | 0.266 | 0.262 | 1.53% | 50.68 | 49.750 | 1.87% |
|
Table 1. Experimental results