Lens Testing Method Based On The Boiling Phenomenon Of Laser Speckle

Shin-ichi Komatsu; Toshio Morioka; Hitoshi Ohzu

doi:10.1117/12.949531

25 November 1985 Lens Testing Method Based On The Boiling Phenomenon Of Laser Speckle

Shin-ichi Komatsu, Toshio Morioka, Hitoshi Ohzu

Proceedings Volume 0556, Intl Conf on Speckle; (1985) https://doi.org/10.1117/12.949531
Event: 29th Annual Technical Symposium, 1985, San Diego, United States

Abstract

The boiling phenomenon of the subjective laser speckle produced by a moving diffuser is applied for lens testing by two methods, in one of which the temporal auto-correlation of the fluctuating signal detected at a certain point in the speckle field is used for measuring the modulation transfer function (MTF) of the lens through which the speckle is produced. Using an automated MTF measuring system developed on this principle, some experimental results are obtained for an ordinary camera lens as well as a gradient-index (GRIN) rod lens. In the other method, the spatial cross-correlation of two speckle patterns produced before and after the diffuser translation is used for visualizing the non-uniformity of imaging capability of a GRIN rod-lens-array.

Citation Download Citation

Shin-ichi Komatsu, Toshio Morioka, and Hitoshi Ohzu "Lens Testing Method Based On The Boiling Phenomenon Of Laser Speckle", Proc. SPIE 0556, Intl Conf on Speckle, (25 November 1985); https://doi.org/10.1117/12.949531

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