In holographic applications, coherent lasers are indispensable source of illumination. Despite high intensity from coherent light sources, they fail in full‐field image projection and illustrate speckle images due to high spatial coherence. This article demonstrates speckle‐free high contrast computer‐generated holographic image projection upon illumination with a perovskite–polystyrene 10 wt%‐based random laser. Solvent‐engineered efficient and durable perovskite and perovskite–polystyrene 10 wt%‐based random lasers are fabricated. Optical characterizations are elucidated and controlled coherence random lasing operation is achieved under room temperature upon addition of polystyrene concentration 10 wt% on perovskite thin film. The addition of 10 wt% polystyrene concentration results in a low far‐field divergence angle of ≈10⁰. The controlled coherence in random lasers is necessary to produce a stable interference pattern and to retain the depth of field in holograms. Additionally, the holographic image projection using random lasers reduces diffraction noise, and exhibits high spatial resolution with full‐field imaging. Moreover, this study is clear evidence of an effective strategy to achieve high‐performance, indigenous designed‐controlled coherence in disordered random lasing media and its application to novel holographic image projection.

中文翻译：

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使用随机激光照明的全息图像降噪

在全息应用中，相干激光是必不可少的照明光源。尽管相干光源的强度很高，但由于高空间相干性，它们无法在全场图像投影中显示斑点图像。本文演示了在钙钛矿–聚苯乙烯10 wt％基随机激光照射下，无斑点高对比度计​​算机生成的全息图像投影。制造了溶剂设计的高效耐用的钙钛矿和钙钛矿-聚苯乙烯10 wt％基无规激光器。阐明了光学特征，并在钙钛矿薄膜上添加浓度为10 wt％的聚苯乙烯时，在室温下实现了可控的相干随机激射操作。添加10 wt％的聚苯乙烯浓度会导致≈10的低远场发散角⁰。为了产生稳定的干涉图并保持全息图中的景深，随机激光器中受控的相干性是必需的。此外，使用随机激光的全息图像投影可降低衍射噪声，并在全场成像中展现出高空间分辨率。此外，这项研究清楚地证明了在无序随机激光介质中实现高性能，本地设计控制的相干性的有效策略及其在新型全息图像投影中的应用。