{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:L7H5XI5TPVAY2Q2735YC2M2MN2","short_pith_number":"pith:L7H5XI5T","canonical_record":{"source":{"id":"2605.21839","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-05-21T00:16:43Z","cross_cats_sorted":[],"title_canon_sha256":"f6a573452987e5bcacc571d2fcdc2ccd9fac6ef48931143813a0d3cd7144e98a","abstract_canon_sha256":"f2ec0e560e353e40d5113f1ace4ec6381b264ee7aa629b6378603a9df5593958"},"schema_version":"1.0"},"canonical_sha256":"5fcfdba3b37d418d435fdf702d334c6e9173fe583d1cef3713ece67746b31737","source":{"kind":"arxiv","id":"2605.21839","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.21839","created_at":"2026-05-22T01:04:10Z"},{"alias_kind":"arxiv_version","alias_value":"2605.21839v1","created_at":"2026-05-22T01:04:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.21839","created_at":"2026-05-22T01:04:10Z"},{"alias_kind":"pith_short_12","alias_value":"L7H5XI5TPVAY","created_at":"2026-05-22T01:04:10Z"},{"alias_kind":"pith_short_16","alias_value":"L7H5XI5TPVAY2Q27","created_at":"2026-05-22T01:04:10Z"},{"alias_kind":"pith_short_8","alias_value":"L7H5XI5T","created_at":"2026-05-22T01:04:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:L7H5XI5TPVAY2Q2735YC2M2MN2","target":"record","payload":{"canonical_record":{"source":{"id":"2605.21839","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-05-21T00:16:43Z","cross_cats_sorted":[],"title_canon_sha256":"f6a573452987e5bcacc571d2fcdc2ccd9fac6ef48931143813a0d3cd7144e98a","abstract_canon_sha256":"f2ec0e560e353e40d5113f1ace4ec6381b264ee7aa629b6378603a9df5593958"},"schema_version":"1.0"},"canonical_sha256":"5fcfdba3b37d418d435fdf702d334c6e9173fe583d1cef3713ece67746b31737","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-22T01:04:10.422939Z","signature_b64":"CPx85KRGpYYkL5rade37Q+CPMrmiuxRkzRHaQSkmbhs51z5fkqBjvWVgnqykYDo4teNQ81jYE1cNULCAJ4ADBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5fcfdba3b37d418d435fdf702d334c6e9173fe583d1cef3713ece67746b31737","last_reissued_at":"2026-05-22T01:04:10.422230Z","signature_status":"signed_v1","first_computed_at":"2026-05-22T01:04:10.422230Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2605.21839","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-22T01:04:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o6PVjzIiHDP/t/yHNo99QJRxliQKQX8Dj5/nspCk35ZndHB3VLnLhBUMRvGY7KJWF6l3BQep7bfR0XKwQxgHBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T21:35:35.633884Z"},"content_sha256":"5ba66c0277f5b64eaecd3021685206b2daf6769f8d1f93c8ea2395a9906c48ea","schema_version":"1.0","event_id":"sha256:5ba66c0277f5b64eaecd3021685206b2daf6769f8d1f93c8ea2395a9906c48ea"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:L7H5XI5TPVAY2Q2735YC2M2MN2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Phase-edge imaging using q-plate shifts for faster and simpler microscopy","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Hirokazu Kobayashi, Jigme Zangpo, Ryo Yasuhara","submitted_at":"2026-05-21T00:16:43Z","abstract_excerpt":"We present a simplified method for isolating the edges of a phase object from the edges of an amplitude object using a 4f system with an off-axis q-plate. Instead of the four off-axis shifts of the q-plate required in previous work, we need only two shifts (along +/- x) combined with linear polarizers at 45 degrees and 135 degrees. The number of measurements is reduced by half, potentially doubling the acquisition speed. We derive the theoretical basis, showing that the resulting intensity corresponds to the phase gradient squared, with amplitude-object contributions eliminated. Experiments on"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.21839","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.21839/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-22T01:04:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1YlI1Pi48a5ozZ+V5FW4gnM84XztKGEkQIBCb7zbUypAE9RN8XXAihcz8we1fjFZKqYyW5VFq79MC90UZxsZAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T21:35:35.634706Z"},"content_sha256":"5b5a9b9da14eeab7ec573aff77cd9d87e146554e32440f9748277a4e38634a06","schema_version":"1.0","event_id":"sha256:5b5a9b9da14eeab7ec573aff77cd9d87e146554e32440f9748277a4e38634a06"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L7H5XI5TPVAY2Q2735YC2M2MN2/bundle.json","state_url":"https://pith.science/pith/L7H5XI5TPVAY2Q2735YC2M2MN2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L7H5XI5TPVAY2Q2735YC2M2MN2/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-10T21:35:35Z","links":{"resolver":"https://pith.science/pith/L7H5XI5TPVAY2Q2735YC2M2MN2","bundle":"https://pith.science/pith/L7H5XI5TPVAY2Q2735YC2M2MN2/bundle.json","state":"https://pith.science/pith/L7H5XI5TPVAY2Q2735YC2M2MN2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L7H5XI5TPVAY2Q2735YC2M2MN2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:L7H5XI5TPVAY2Q2735YC2M2MN2","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":"f2ec0e560e353e40d5113f1ace4ec6381b264ee7aa629b6378603a9df5593958","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-05-21T00:16:43Z","title_canon_sha256":"f6a573452987e5bcacc571d2fcdc2ccd9fac6ef48931143813a0d3cd7144e98a"},"schema_version":"1.0","source":{"id":"2605.21839","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.21839","created_at":"2026-05-22T01:04:10Z"},{"alias_kind":"arxiv_version","alias_value":"2605.21839v1","created_at":"2026-05-22T01:04:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.21839","created_at":"2026-05-22T01:04:10Z"},{"alias_kind":"pith_short_12","alias_value":"L7H5XI5TPVAY","created_at":"2026-05-22T01:04:10Z"},{"alias_kind":"pith_short_16","alias_value":"L7H5XI5TPVAY2Q27","created_at":"2026-05-22T01:04:10Z"},{"alias_kind":"pith_short_8","alias_value":"L7H5XI5T","created_at":"2026-05-22T01:04:10Z"}],"graph_snapshots":[{"event_id":"sha256:5b5a9b9da14eeab7ec573aff77cd9d87e146554e32440f9748277a4e38634a06","target":"graph","created_at":"2026-05-22T01:04:10Z","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/2605.21839/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a simplified method for isolating the edges of a phase object from the edges of an amplitude object using a 4f system with an off-axis q-plate. Instead of the four off-axis shifts of the q-plate required in previous work, we need only two shifts (along +/- x) combined with linear polarizers at 45 degrees and 135 degrees. The number of measurements is reduced by half, potentially doubling the acquisition speed. We derive the theoretical basis, showing that the resulting intensity corresponds to the phase gradient squared, with amplitude-object contributions eliminated. Experiments on","authors_text":"Hirokazu Kobayashi, Jigme Zangpo, Ryo Yasuhara","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-05-21T00:16:43Z","title":"Phase-edge imaging using q-plate shifts for faster and simpler microscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.21839","kind":"arxiv","version":1},"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":"sha256:5ba66c0277f5b64eaecd3021685206b2daf6769f8d1f93c8ea2395a9906c48ea","target":"record","created_at":"2026-05-22T01:04:10Z","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":"f2ec0e560e353e40d5113f1ace4ec6381b264ee7aa629b6378603a9df5593958","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-05-21T00:16:43Z","title_canon_sha256":"f6a573452987e5bcacc571d2fcdc2ccd9fac6ef48931143813a0d3cd7144e98a"},"schema_version":"1.0","source":{"id":"2605.21839","kind":"arxiv","version":1}},"canonical_sha256":"5fcfdba3b37d418d435fdf702d334c6e9173fe583d1cef3713ece67746b31737","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5fcfdba3b37d418d435fdf702d334c6e9173fe583d1cef3713ece67746b31737","first_computed_at":"2026-05-22T01:04:10.422230Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-22T01:04:10.422230Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CPx85KRGpYYkL5rade37Q+CPMrmiuxRkzRHaQSkmbhs51z5fkqBjvWVgnqykYDo4teNQ81jYE1cNULCAJ4ADBQ==","signature_status":"signed_v1","signed_at":"2026-05-22T01:04:10.422939Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.21839","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5ba66c0277f5b64eaecd3021685206b2daf6769f8d1f93c8ea2395a9906c48ea","sha256:5b5a9b9da14eeab7ec573aff77cd9d87e146554e32440f9748277a4e38634a06"],"state_sha256":"f8b15e476a331ab131d993b8bf29d65cd7f1e9c688eb716c97c7daa8f09797d1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yNtrLtzEdqUXJvETJWAUXhosz6553/ODLPj4S+4a4AejvrDorwM6XS98mr3vhGjXQy0EE1Ge+RFKOQdbSDOADQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T21:35:35.640060Z","bundle_sha256":"9fd16d725bf3122da0968888265e1a62d493af7dbb6c1d75d0c58f8138645ba2"}}