A new method for laser speckle suppression

Michael Tilleman

doi:10.1117/12.847221

15 February 2010 A new method for laser speckle suppression

Michael Tilleman

Proceedings Volume 7618, Emerging Liquid Crystal Technologies V; 76180A (2010) https://doi.org/10.1117/12.847221
Event: SPIE OPTO, 2010, San Francisco, California, United States

Abstract

The objective of this work is the suppression of speckles in an image illuminated by a remote laser. This is accomplished by a novel method in which the illuminating laser beam propagates through a multimode fiber dithered at an arbitrary section, then passes through a microlens array prior to illuminating the image generator. Thereby the speckle contrast is reduced to its minimum value for dithering frequencies of at least 25 Hz, attaining a magnitude speckle contrast of less than 12%, and illumination homogeneity across the illumination filed of less than 20%.

Citation Download Citation

Michael Tilleman "A new method for laser speckle suppression", Proc. SPIE 7618, Emerging Liquid Crystal Technologies V, 76180A (15 February 2010); https://doi.org/10.1117/12.847221

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