Abstract

This comment demonstrates several errors in the derivation of speckle contrast and corresponding measurements reported by Cheng et al. [Appl. Opt. 41, 4148 (2002)] for a 4f optical system. In particular, the theoretical derivation is wrong: It is used outside of its domain of validity, and the experimental results do not support the theoretical analysis.

© 2003 Optical Society of America

Reply to comment: Absolute measurement of roughness and lateral-correlation length of random surfaces by use of the simplified model of image-speckle contrast

Chuanfu Cheng, Chunxiang Liu, Ningyu Zhang, Tianqing Jia, Ruxin Li, and Zhizhan Xu
Appl. Opt. 42(14) 2523-2525 (2003)

Absolute measurement of roughness and lateral-correlation length of random surfaces by use of the simplified model of image-speckle contrast

Chuanfu Cheng, Chunxiang Liu, Ningyu Zhang, Tianqing Jia, Ruxin Li, and Zhizhan Xu
Appl. Opt. 41(20) 4148-4156 (2002)

Axial irradiance distribution throughout the whole space behind an annular aperture: comments

José A. Ferrari and Alfredo Dubra
Appl. Opt. 42(19) 3754-3755 (2003)

Comment: influence of illuminating beyond the object support on Zernike-type phase contrast filtering

Jesper Glückstad, Vincent R. Daria, and René L. Eriksen
Appl. Opt. 42(5) 792-793 (2003)

Large-angle in-plane light scattering from rough surfaces: comment

Thomas A. Germer
Appl. Opt. 40(31) 5708-5710 (2001)