Ma X H, Wang A T, Ma F H, Wu S M, Ming H. Speckle reduction using phase plate array and lens array. Opto‐Electron Adv 3, 190036 (2020). doi: 10.29026/oea.2020.190036
Citation: Ma X H, Wang A T, Ma F H, Wu S M, Ming H. Speckle reduction using phase plate array and lens array. Opto‐Electron Adv 3, 190036 (2020). doi: 10.29026/oea.2020.190036

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Speckle reduction using phase plate array and lens array

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  • In this paper, a solution for speckle reduction using phase plate array (PPA) and lens array (LA) in a motionless way is proposed. The specially designed PPA is composed of sub-phase plates, which are constituted by phase patterns formed by Hadamard sub-matrices. Each component of the proposed optical system should satisfy the stated relationships. The incident laser beam will be incoherent after passing through PPA, and superpose on the screen under the action of LA and main lens. Speckle reduction can be achieved by the averaging of the incoherent speckle patterns. Because of abandoning the mechanical movement, it will be suitable for laser displays and images.
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