HoloTrap: Interactive hologram design for multiple dynamic optical trapping

Abstract This work presents an application that generates real-time holograms to be displayed on a holographic optical tweezers setup; a technique that allows the manipulation of particles in the range from micrometres to nanometres. The software is written in Java, and uses random binary masks to generate the holograms. It allows customization of several parameters that are dependent on the experimental setup, such as the specific characteristics of the device displaying the hologram, or the presence of aberrations. We evaluate the software's performance and conclude that real-time interaction is achieved. We give our experimental results from manipulating 5 μm microspheres using the program. Program summary Title of program: HoloTrap Catalogue identifier:ADZB_v1_0 Program summary URL: http://cpc.cs.qub.ac.uk/summaries/ADZB_v1_0 Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland Computer for which the program is designed and others on which it has been tested: General computer Operating systems or monitors under which the program has been tested: Windows, Linux Programming language used: Java Memory required to execute with typical data: up to 34 MB including the Java Virtual Machine No. of bits in a word: 8 bits No. of processors used: 1 Has the code been vectorized or parallelized?: No No. of lines in distributed program, including test data, etc.: 471 145 No. of bytes in distributed program, including test data, etc.: 1 141 457 Distribution format: tar.gz Nature of physical problem: To calculate and display holograms for generating multiple and dynamic optical tweezers to be reconfigured interactively. Method of solution: Fast random binary mask for the simultaneous codification of multiple phase functions into a phase modulation device. Typical running time: Up to 10 frames per second Unusual features of the program: None References: The method for calculating holograms can be found in [M. Montes-Usategui, E. Pleguezuelos, J. Andilla, E. Martin-Badosa, Fast generation of holographic optical tweezers by random mask encoding of Fourier components, Opt. Express 14 (2006) 2101–2107].

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