Snapshot　hyperspectral　imaging　based　on　a　diffractive　optical　element(DOE)is　increasingly　featured　in　recent　progress　in　deep　optics.Despite　remarkable　advances　in　spatial　and　spectral　resolutions,the　limitations　of　current　photolithography　technology　have　prevented　the　fabricated　DOE　from　being　designed　at　ideal　heights　and　with　high　diffraction　efficiency,diminishing　the　effectiveness　of　coded　imaging　and　reconstruction　accuracy　in　some　bands.Here,we　propose,to　our　knowledge,a　new　lensless　efficient　snapshot　hyperspectral　imaging(LESHI)system　that　utilizes　a　liquid-crystal-on-silicon　spatial　light　modulator(LCoS-SLM)to　replace　the　traditionally　fabricated　DOE,resulting　in　high　modulation　levels　and　reconstruction　accuracy.Beyond　the　single-lens　imaging　model,the　system　can　leverage　the　switch　ability　of　LCoS-SLM　to　implement　distributed　diffractive　optics(DDO)imaging　and　enhance　diffraction　efficiency　across　the　full　visible　spectrum.Using　the　proposed　method,we　de-velop　a　proof-of-concept　prototype　with　an　image　resolution　of　1920　x　1080　pixels,an　effective　spatial　resolution　of　41.74　μm,and　a　spectral　resolution　of　10　nm,while　improving　the　average　diffraction　efficiency　from　0.75　to　0.91　over　the　visible　wavelength　range(400-700　nm).Additionally,LESHI　allows　the　focal　length　to　be　adjusted　from　50　mm　to　100　mm　without　the　need　for　additional　optical　components,providing　a　cost-effective　and　time-saving　solution　for　real-time　on-site　debugging.LESHI　is　the　first　imaging　modality,to　the　best　of　our　knowledge,to　use　dynamic　diffractive　optics　and　snapshot　hyperspectral　imaging,offering　a　completely　new　approach　to　computational　spectral　imaging　and　deep　optics.©　2025　Chinese　Laser　Press