{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:LSSG7M53CE5S3DZOODWAAKBFFL","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"f35e057bbd978cf778e926284731354193b763fe3e372f8106373c1bbeb356ba","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-09-10T13:22:58Z","title_canon_sha256":"3df3ac511b75967aae53b44dbb6519cf5409708952b1097853023bfae954fab5"},"schema_version":"1.0","source":{"id":"1509.03138","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.03138","created_at":"2026-05-18T01:12:49Z"},{"alias_kind":"arxiv_version","alias_value":"1509.03138v2","created_at":"2026-05-18T01:12:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.03138","created_at":"2026-05-18T01:12:49Z"},{"alias_kind":"pith_short_12","alias_value":"LSSG7M53CE5S","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"LSSG7M53CE5S3DZO","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"LSSG7M53","created_at":"2026-05-18T12:29:29Z"}],"graph_snapshots":[{"event_id":"sha256:06317a7cc077d7a5c21692347dae96b998806e8b5d8440c2511c145ad54df137","target":"graph","created_at":"2026-05-18T01:12:49Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Terahertz (THz) imaging has the ability to see through otherwise opaque materials. However, due to the long wavelengths of THz radiation ({\\lambda}=300{\\mu}m at 1THz), far-field THz imaging techniques are heavily outperformed by optical imaging in regards to the obtained resolution. In this work we demonstrate near-field THz imaging with a single-pixel detector. We project a time-varying optical mask onto a silicon wafer which is used to spatially modulate a pulse of THz radiation. The far-field transmission corresponding to each mask is recorded by a single element detector and this data is u","authors_text":"B. Sun, E. Hendry, G. M. Gibson, M. J. Padgett, P. A. Hobson, R. I. Stantchev, S. M. Hornett","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-09-10T13:22:58Z","title":"Non-invasive, near-field terahertz imaging of hidden objects using a single pixel detector"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.03138","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:a2fe0e5478c356201d94aa0c99613d80fdb020b66c7b9812df6cf6a91aca0c34","target":"record","created_at":"2026-05-18T01:12:49Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"f35e057bbd978cf778e926284731354193b763fe3e372f8106373c1bbeb356ba","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-09-10T13:22:58Z","title_canon_sha256":"3df3ac511b75967aae53b44dbb6519cf5409708952b1097853023bfae954fab5"},"schema_version":"1.0","source":{"id":"1509.03138","kind":"arxiv","version":2}},"canonical_sha256":"5ca46fb3bb113b2d8f2e70ec0028252adbe86b2b43111ee763873c059e96196c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5ca46fb3bb113b2d8f2e70ec0028252adbe86b2b43111ee763873c059e96196c","first_computed_at":"2026-05-18T01:12:49.657993Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:12:49.657993Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aIK/o1G02ADghi2w7Yf1ZWNcEYLl7p9/g6QabKa0PLhisJOnz8CkhkJPImsUGNrB1klLJL5qI7kJuI8x7tWkDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:12:49.658377Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.03138","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a2fe0e5478c356201d94aa0c99613d80fdb020b66c7b9812df6cf6a91aca0c34","sha256:06317a7cc077d7a5c21692347dae96b998806e8b5d8440c2511c145ad54df137"],"state_sha256":"48ba80d10df177b52ae3d7ff2bdd5d48f0e4a4a669cdb2cb530b949e9a595fc7"}