Characterizing a liquid crystal spatial light modulator at oblique incidence angles using the self-interference method

Zixin Zhao; Yiying Zhuang; Zhaoxian Xiao; Hangying Zhang; Chen Fan; Hehui Geng; Hong Zhao

doi:doi:10.3788/COL201816.090701

Chinese Optics Letters, 2018, 16 (9): 090701, Published Online: Sep. 6, 2018

Characterizing a liquid crystal spatial light modulator at oblique incidence angles using the self-interference method Download： 620次

Zixin Zhao ^1,*Yiying Zhuang ¹Zhaoxian Xiao ²Hangying Zhang ¹Chen Fan ¹Hehui Geng ¹Hong Zhao ¹

Author Affiliations

¹ State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China

² Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621000, China

Figures & Tables

Fig. 1. Schematic diagram of LC-SLM. ITO, indium tin oxide.

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Fig. 2. Self-interference measurement system of LC-SLM under oblique incidence with (a) small incident angle and (b) large incident angle.

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Fig. 3. Combined grayscale pattern loaded on the LC-SLM.

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Fig. 4. Experimental results: (a) original fringe pattern, (b) extracted fringe pattern by red rectangle, (c) FFT result of one row.

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Fig. 5. Comparisons of our proposed method with Fuentes’ method using data from eight experiments. (a) The four phase modulation curves were obtained using Fuentes’ method; (b) the four curves were obtained using our proposed method; (c) the maximum phase difference curves of Fuentes’ method (black squares) and our proposed method (red circles).

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Fig. 6. Phase modulation properties of LC-SLM at small incident angles: (a) phase modulation curves for oblique illumination angles of 0°, 1°, 2°, 3°, 4°, 5°; (b) phase modulation values for specific gray levels (0, 48, 96, 152, 200, 255) under different incident angles.

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Fig. 7. Phase modulation properties of LC-SLM at large incident angles: (a) phase modulation curves for oblique illumination angles of 0°, 10°, 20°, 30°, 40°, 45°; (b) phase modulation values for specific gray levels (0, 48, 96, 152, 200, 224, 240, 255) under different incident angles.

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Zixin Zhao, Yiying Zhuang, Zhaoxian Xiao, Hangying Zhang, Chen Fan, Hehui Geng, Hong Zhao. Characterizing a liquid crystal spatial light modulator at oblique incidence angles using the self-interference method[J]. Chinese Optics Letters, 2018, 16(9): 090701.

Characterizing a liquid crystal spatial light modulator at oblique incidence angles using the self-interference method Download： 620次

Fig. 1. Schematic diagram of LC-SLM. ITO, indium tin oxide.

Fig. 2. Self-interference measurement system of LC-SLM under oblique incidence with (a) small incident angle and (b) large incident angle.

Fig. 3. Combined grayscale pattern loaded on the LC-SLM.

Fig. 4. Experimental results: (a) original fringe pattern, (b) extracted fringe pattern by red rectangle, (c) FFT result of one row.

Fig. 6. Phase modulation properties of LC-SLM at small incident angles: (a) phase modulation curves for oblique illumination angles of 0°, 1°, 2°, 3°, 4°, 5°; (b) phase modulation values for specific gray levels (0, 48, 96, 152, 200, 255) under different incident angles.

Fig. 7. Phase modulation properties of LC-SLM at large incident angles: (a) phase modulation curves for oblique illumination angles of 0°, 10°, 20°, 30°, 40°, 45°; (b) phase modulation values for specific gray levels (0, 48, 96, 152, 200, 224, 240, 255) under different incident angles.

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Characterizing a liquid crystal spatial light modulator at oblique incidence angles using the self-interference method Download： 620次

Fig. 1. Schematic diagram of LC-SLM. ITO, indium tin oxide.

Fig. 2. Self-interference measurement system of LC-SLM under oblique incidence with (a) small incident angle and (b) large incident angle.

Fig. 3. Combined grayscale pattern loaded on the LC-SLM.

Fig. 4. Experimental results: (a) original fringe pattern, (b) extracted fringe pattern by red rectangle, (c) FFT result of one row.

Fig. 6. Phase modulation properties of LC-SLM at small incident angles: (a) phase modulation curves for oblique illumination angles of 0°, 1°, 2°, 3°, 4°, 5°; (b) phase modulation values for specific gray levels (0, 48, 96, 152, 200, 255) under different incident angles.

Fig. 7. Phase modulation properties of LC-SLM at large incident angles: (a) phase modulation curves for oblique illumination angles of 0°, 10°, 20°, 30°, 40°, 45°; (b) phase modulation values for specific gray levels (0, 48, 96, 152, 200, 224, 240, 255) under different incident angles.

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