{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:WO74DYTLGOPLSR4QEXFPJUSA7J","short_pith_number":"pith:WO74DYTL","canonical_record":{"source":{"id":"1806.05457","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2018-06-14T10:46:02Z","cross_cats_sorted":[],"title_canon_sha256":"d8004b7760e73e559949c63a57e1d462d0006924f3171983084bb1f77f650606","abstract_canon_sha256":"570ad1bf3de35090722bd354924de4dbe0158efbd345aaf063aae8d6503ec70a"},"schema_version":"1.0"},"canonical_sha256":"b3bfc1e26b339eb9479025caf4d240fa753b83e02dbad29546509888f8e3346f","source":{"kind":"arxiv","id":"1806.05457","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.05457","created_at":"2026-05-18T00:06:59Z"},{"alias_kind":"arxiv_version","alias_value":"1806.05457v1","created_at":"2026-05-18T00:06:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.05457","created_at":"2026-05-18T00:06:59Z"},{"alias_kind":"pith_short_12","alias_value":"WO74DYTLGOPL","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"WO74DYTLGOPLSR4Q","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"WO74DYTL","created_at":"2026-05-18T12:33:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:WO74DYTLGOPLSR4QEXFPJUSA7J","target":"record","payload":{"canonical_record":{"source":{"id":"1806.05457","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2018-06-14T10:46:02Z","cross_cats_sorted":[],"title_canon_sha256":"d8004b7760e73e559949c63a57e1d462d0006924f3171983084bb1f77f650606","abstract_canon_sha256":"570ad1bf3de35090722bd354924de4dbe0158efbd345aaf063aae8d6503ec70a"},"schema_version":"1.0"},"canonical_sha256":"b3bfc1e26b339eb9479025caf4d240fa753b83e02dbad29546509888f8e3346f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:06:59.361556Z","signature_b64":"MaIs9cKSZFdNYUmHZYCTWg7UcL27VU9bR1Vxo5AJpGosaTMBghokTOGBy/PlkLG9UbiirUdPObcRf43S577hAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b3bfc1e26b339eb9479025caf4d240fa753b83e02dbad29546509888f8e3346f","last_reissued_at":"2026-05-18T00:06:59.360932Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:06:59.360932Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1806.05457","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":"2026-05-18T00:06:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9FuvpnqR8/ptRNd7620eLKBehV9OzbAsFAa7FGjaAULEDgCGtQ0LX9iCBrgGLIC8S+NZtVm7EwM12p8CBMrBBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T22:11:56.584004Z"},"content_sha256":"200a6bbdfa3b77f864a65a61466feb5d2e789a90cf129fbf127a01fabc5804b0","schema_version":"1.0","event_id":"sha256:200a6bbdfa3b77f864a65a61466feb5d2e789a90cf129fbf127a01fabc5804b0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:WO74DYTLGOPLSR4QEXFPJUSA7J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Microscope calibration using laser written fluorescence","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Alexander D. Corbett, Andrew Jefferson, Andrew Yacoot, Lothar Schermelleh, Martin Booth, Michael Shaw, Patrick S. Salter, Tony Wilson","submitted_at":"2018-06-14T10:46:02Z","abstract_excerpt":"There is currently no widely adopted standard for the optical characterisation of fluorescence microscopes. We used laser written fluorescence to generate two- and three-dimensional patterns to deliver a quick and quantitative measure of imaging performance. We report on the use of two laser written patterns to measure the lateral resolution, illumination uniformity, lens distortion and colour plane alignment using confocal and structured illumination fluorescence microscopes."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.05457","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":""},"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":"2026-05-18T00:06:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WPxmaxqGA3bXhUvhYvqJ4P9F2tLec3vxYmQ9XQQKceQqKyKJ9rgN8dhu3+qQME7LcjqhGyCn1nh9zT1k0i4dAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T22:11:56.584701Z"},"content_sha256":"fb9a4ebeae433314322222ed10a7f90507b6e4a192c361740aa8a229dbfce19f","schema_version":"1.0","event_id":"sha256:fb9a4ebeae433314322222ed10a7f90507b6e4a192c361740aa8a229dbfce19f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WO74DYTLGOPLSR4QEXFPJUSA7J/bundle.json","state_url":"https://pith.science/pith/WO74DYTLGOPLSR4QEXFPJUSA7J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WO74DYTLGOPLSR4QEXFPJUSA7J/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":"2026-05-27T22:11:56Z","links":{"resolver":"https://pith.science/pith/WO74DYTLGOPLSR4QEXFPJUSA7J","bundle":"https://pith.science/pith/WO74DYTLGOPLSR4QEXFPJUSA7J/bundle.json","state":"https://pith.science/pith/WO74DYTLGOPLSR4QEXFPJUSA7J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WO74DYTLGOPLSR4QEXFPJUSA7J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:WO74DYTLGOPLSR4QEXFPJUSA7J","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":"570ad1bf3de35090722bd354924de4dbe0158efbd345aaf063aae8d6503ec70a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2018-06-14T10:46:02Z","title_canon_sha256":"d8004b7760e73e559949c63a57e1d462d0006924f3171983084bb1f77f650606"},"schema_version":"1.0","source":{"id":"1806.05457","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.05457","created_at":"2026-05-18T00:06:59Z"},{"alias_kind":"arxiv_version","alias_value":"1806.05457v1","created_at":"2026-05-18T00:06:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.05457","created_at":"2026-05-18T00:06:59Z"},{"alias_kind":"pith_short_12","alias_value":"WO74DYTLGOPL","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"WO74DYTLGOPLSR4Q","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"WO74DYTL","created_at":"2026-05-18T12:33:01Z"}],"graph_snapshots":[{"event_id":"sha256:fb9a4ebeae433314322222ed10a7f90507b6e4a192c361740aa8a229dbfce19f","target":"graph","created_at":"2026-05-18T00:06:59Z","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":"There is currently no widely adopted standard for the optical characterisation of fluorescence microscopes. We used laser written fluorescence to generate two- and three-dimensional patterns to deliver a quick and quantitative measure of imaging performance. We report on the use of two laser written patterns to measure the lateral resolution, illumination uniformity, lens distortion and colour plane alignment using confocal and structured illumination fluorescence microscopes.","authors_text":"Alexander D. Corbett, Andrew Jefferson, Andrew Yacoot, Lothar Schermelleh, Martin Booth, Michael Shaw, Patrick S. Salter, Tony Wilson","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2018-06-14T10:46:02Z","title":"Microscope calibration using laser written fluorescence"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.05457","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":"sha256:200a6bbdfa3b77f864a65a61466feb5d2e789a90cf129fbf127a01fabc5804b0","target":"record","created_at":"2026-05-18T00:06:59Z","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":"570ad1bf3de35090722bd354924de4dbe0158efbd345aaf063aae8d6503ec70a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2018-06-14T10:46:02Z","title_canon_sha256":"d8004b7760e73e559949c63a57e1d462d0006924f3171983084bb1f77f650606"},"schema_version":"1.0","source":{"id":"1806.05457","kind":"arxiv","version":1}},"canonical_sha256":"b3bfc1e26b339eb9479025caf4d240fa753b83e02dbad29546509888f8e3346f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b3bfc1e26b339eb9479025caf4d240fa753b83e02dbad29546509888f8e3346f","first_computed_at":"2026-05-18T00:06:59.360932Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:59.360932Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MaIs9cKSZFdNYUmHZYCTWg7UcL27VU9bR1Vxo5AJpGosaTMBghokTOGBy/PlkLG9UbiirUdPObcRf43S577hAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:59.361556Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.05457","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:200a6bbdfa3b77f864a65a61466feb5d2e789a90cf129fbf127a01fabc5804b0","sha256:fb9a4ebeae433314322222ed10a7f90507b6e4a192c361740aa8a229dbfce19f"],"state_sha256":"40ad4095440588ab840c7eac3a455a1f29b84c54c247b7d32fa5a1aa75a0b441"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dXBsJpSp15zWaHVYyvqpFl8IPsL5iWPtDh94ZdhhFKcnHAnkdd9wFBODUM/M0veF5jrta4Z7NR93Rmi06nqBDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T22:11:56.588455Z","bundle_sha256":"9d6302d7e0f7061b7de685af008d79ef58b65395145d1bc43a1f69d069953850"}}