{"artifact_id":"L1-023","layer":"L1","title":"Three-Photon Microscopy (chi-5 deep-tissue imaging)","domain":"Microscopy","sub_domain":"Higher-order NLO microscopy for thick scattering tissue","physics_fingerprint":{"L_DAG":3.8,"title":"Three-Photon Microscopy (chi-5 deep-tissue imaging)","domain":"Microscopy","carrier":"photon","primitives":["L.excitation.nonlinear_chi5","S.scan.raster","int.temporal"],"sub_domain":"Higher-order NLO microscopy for thick scattering tissue","noise_model":"shot_poisson","problem_class":"nonlinear_inverse","solution_space":"3D_intensity","difficulty_delta":10,"integration_axis":"temporal","sensing_mechanism":"three_photon_nlo"},"observable_profile":{"metric":"PSNR_dB","regime":"Existence of the recovered 3D intensity is guaranteed within the declared Omega bounds. Uniqueness is local rather than global (non-convex landscape); convergence depends on initialisation and priors. Stability is moderately conditioned (kappa_eff ~= 22); pulse_compression_drift dominates the stability cliff; sample_scattering and the remaining mismatch parameters contribute higher-order bias terms. Photon-shot-noise-limited (poisson counting) sets the irreducible data-fidelity floor, while TV / wavelet-sparsity / deep priors stabilise recovery at the ill-conditioned end of Omega.","secondary":"SSIM"},"size_tiers":{"center_spec":{"omega":{"H":512,"W":512,"Z":100,"NA":1.0,"pixel_nm":400,"lambda_ex_nm":1300,"peak_photons":30,"pulse_width_fs":60,"sample_scattering":0.0},"input_format":"measurement_only","problem_class":"three_photon","forward_operator":"three_photon_forward","epsilon_fn_center":"22.0"},"omega_bounds":{"H":[128,2048],"W":[128,2048],"Z":[16,512],"NA":[0.5,1.1],"pixel_nm":[200,1000],"lambda_ex_nm":[1200,1700],"peak_photons":[5,500],"pulse_width_fs":[30,300],"sample_scattering":[0.0,0.8],"long_wavelength_absorption":[0.0,0.5]},"epsilon_bounds":{"psnr_db":[12.0,42.0]},"allowed_problem_classes":["three_photon"],"allowed_omega_dimensions":["H","W","Z","pixel_nm","NA","lambda_ex_nm","peak_photons","pulse_width_fs","sample_scattering","pulse_compression_drift","sample_scattering","long_wavelength_absorption"],"allowed_forward_operators":["three_photon_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":10,"kappa":440,"metric":"PSNR_dB"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0x6006f879b51c8780e420c3954e99bc17c13956a58980560d0d0fe2508eaa644a","chain_tx_hash":"0xe772075299607a0c14e359f93aad3b5b4757c04e22c383ee8a3054094792b0e2","chain_block":41554169}