Anisotropic edge enhancement is simulated using a spiral phase plate （SPP） in optical scanning holography （OSH）. We propose to use a delta function and an SPP as the pupil functions to realize anisotropic edge enh...Anisotropic edge enhancement is simulated using a spiral phase plate （SPP） in optical scanning holography （OSH）. We propose to use a delta function and an SPP as the pupil functions to realize anisotropic edge enhancement. The interference of these two pupils is used to two-dimensionally scan an object to record its edge-only information. This is done in three ways： first, by shifting the SPP, second, by using two offset SPPs of same charge, and finally, by using two oppositely charged SPPs. Our computer simulations show the capability of selectively enhancing the edges of a given obiect.展开更多
基金supported by the National Natural Science Foundation of China (No. 61405214)the Science Foundation of the Shanghai Municipal Commission of Science and Technology (No. 14ZR1445300)
文摘Anisotropic edge enhancement is simulated using a spiral phase plate （SPP） in optical scanning holography （OSH）. We propose to use a delta function and an SPP as the pupil functions to realize anisotropic edge enhancement. The interference of these two pupils is used to two-dimensionally scan an object to record its edge-only information. This is done in three ways： first, by shifting the SPP, second, by using two offset SPPs of same charge, and finally, by using two oppositely charged SPPs. Our computer simulations show the capability of selectively enhancing the edges of a given obiect.
