{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:MI3HAJGXEBDCADR2NFK5GVEXLT","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":"4c43dde9bd78970733c9f7c0c5c7342e5f4cc3dfaab161cc156802f170f6f152","cross_cats_sorted":["physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2023-03-13T13:08:55Z","title_canon_sha256":"55e9ca6a2aec8d8fa98065769e191551ec8ba11a9d5bacd9784c0153ac043da6"},"schema_version":"1.0","source":{"id":"2303.07085","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.07085","created_at":"2026-07-05T05:53:15Z"},{"alias_kind":"arxiv_version","alias_value":"2303.07085v2","created_at":"2026-07-05T05:53:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.07085","created_at":"2026-07-05T05:53:15Z"},{"alias_kind":"pith_short_12","alias_value":"MI3HAJGXEBDC","created_at":"2026-07-05T05:53:15Z"},{"alias_kind":"pith_short_16","alias_value":"MI3HAJGXEBDCADR2","created_at":"2026-07-05T05:53:15Z"},{"alias_kind":"pith_short_8","alias_value":"MI3HAJGX","created_at":"2026-07-05T05:53:15Z"}],"graph_snapshots":[{"event_id":"sha256:515b125734e3b56fbc014335a17b142ee5f2bc139ae1cd99a831fb876d67c2ff","target":"graph","created_at":"2026-07-05T05:53:15Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2303.07085/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a scheme for estimating the noise-equivalent temperature difference (NETD) of frequency upconversion detectors (UCDs) that detect mid-infrared (MIR) light. In particular, this letter investigates the frequency upconversion of a periodically polarized crystal based on lithium niobate, where a mid-infrared conversion bandwidth of 220 nm can be achieved in a single poled period by a special design. Experimentally for a temperature target with a central wavelength of 7.89 {\\mu}m in mid-infrared radiation, we estimated the NETD of the device to be 56 mK. Meanwhile, a direct measurement o","authors_text":"Bao-Sen Shi, Jing-Xin Ceng, Li Chen, Su-Jian Niu, Yan Li, Yin-Hai Li, Zheng Ge, Zhi-Yuan Zhou","cross_cats":["physics.ins-det"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2023-03-13T13:08:55Z","title":"Thermal camera based on frequency upconversion and its noise-equivalent temperature difference characterization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.07085","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:fd3e01ab4f670c999f4b6095fdf6e3878500e963b3fb6893f48d99623eee5819","target":"record","created_at":"2026-07-05T05:53:15Z","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":"4c43dde9bd78970733c9f7c0c5c7342e5f4cc3dfaab161cc156802f170f6f152","cross_cats_sorted":["physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2023-03-13T13:08:55Z","title_canon_sha256":"55e9ca6a2aec8d8fa98065769e191551ec8ba11a9d5bacd9784c0153ac043da6"},"schema_version":"1.0","source":{"id":"2303.07085","kind":"arxiv","version":2}},"canonical_sha256":"62367024d72046200e3a6955d354975cfa81f4c2ad2afccee0a9e13e04dbd367","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"62367024d72046200e3a6955d354975cfa81f4c2ad2afccee0a9e13e04dbd367","first_computed_at":"2026-07-05T05:53:15.989463Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:53:15.989463Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Vud6UbayMNeADZe5NIGarAc6Vx6fKOwljeSVpbhetMEShmJiaM3BzTPZWNahl8+3KBwY4jdXkPdSvxmeeegaBw==","signature_status":"signed_v1","signed_at":"2026-07-05T05:53:15.989935Z","signed_message":"canonical_sha256_bytes"},"source_id":"2303.07085","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fd3e01ab4f670c999f4b6095fdf6e3878500e963b3fb6893f48d99623eee5819","sha256:515b125734e3b56fbc014335a17b142ee5f2bc139ae1cd99a831fb876d67c2ff"],"state_sha256":"eb447a6cbe2b988e7ce97a53c39164ad88aa13aa28d476ae5c143dd84bf706f3"}