TY - JOUR TI - Gradient field microscopy of unstained specimens: reply to comment AB - We reply to the comment written by Ferrari and Ayubi on our recent paper, Kim et al. [Opt. Express, 20, 6737 (2012)]. We maintain that our use of Fourier filtering methods lead to valuable intrinsic contrast live cell imaging. Judging by their comments regarding the limit sin(x)~x, it seems that the authors overlooked Fig. 2 in our paper, where we show results with sinusoidal masks of different periods. AU - Kim, Taewoo AU - Sridharan, Shamira AU - Popescu, Gabriel PB - OSA PY - 2013/08/12 JO - Opt. Express JF - Optics Express JA - Opt. Express VL - 21 IS - 16 SP - 19188 EP - 19188 KW - Microscopy KW - Cell analysis KW - Coherence imaging UR - http://www.opticsexpress.org/abstract.cfm?URI=oe-21-16-19188 ER -