• Korean Journal of Optics and Photonics
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• v.12 no.2
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• pp.83-90
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• 2001

The Talbot effect for periodic objects with the spatial period p illuminated by expanded coherent light is analyzed by Fresnel diffraction theory, and the Talbot distance (Zr) at which we can observe 1: 1 imaging without any lenses can be defined. We confmned experimentally the Talbot imaging of line, circular, X -type and '||'&'||'copy;-type 2 dimensional alTay gratings at ZT. At the same time, we observed phase reversed Talbot imaging at Zr/2 and Talbot subimage with p/2 at Zr/4 and 3Zr/4. The visibility of Talbot images as a function of the number of slits of the input grating was measured by the FFf (Fast Fourier Transform) results of these images. As a result stationary maximum visibility of V = 0.25 was obtained from grating numbers with more than 15 slit pairs.

• Language and Information
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• v.19 no.1
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• pp.59-73
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• 2015

In the traditional Locality approach to floating numeral quantifiers in Korean and Japanese, two subject positions have been identified for external merge, one in Spec, vP and the other in Spec, TP (Saito 1985, Miyagawa 1989, 2013, Miyagawa and Arikawa 2007, etc.). In this paper, I show that the two external merger positions of the subject are unnecessary in the grammar of Korean and Japanese. Rather, by accepting the minimalist assumption of the VP-Internal Subject Hypothesis (Kitagawa 1986, Sportiche 1988, Koopman and Sportiche 1991), we are better able to explain a variety of bewildering phenomena that arise in scrambling contexts of FNQ-constructions.