{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:T3GUBIFSTCEQ5Z33G5ORW5SN3G","short_pith_number":"pith:T3GUBIFS","canonical_record":{"source":{"id":"1908.08879","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-08-23T15:47:07Z","cross_cats_sorted":[],"title_canon_sha256":"a2411f7cb8ee1c5bf2280e9b1da4ff49b162b29606c7d40d04a4735cd7218af4","abstract_canon_sha256":"85610156ed5f575309fa9beb8eedda5b170f8b27c3fd486df965c305a5127c1d"},"schema_version":"1.0"},"canonical_sha256":"9ecd40a0b298890ee77b375d1b764dd997dd376b8874fb6e3a27a8fcf4274244","source":{"kind":"arxiv","id":"1908.08879","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.08879","created_at":"2026-07-05T00:07:24Z"},{"alias_kind":"arxiv_version","alias_value":"1908.08879v2","created_at":"2026-07-05T00:07:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.08879","created_at":"2026-07-05T00:07:24Z"},{"alias_kind":"pith_short_12","alias_value":"T3GUBIFSTCEQ","created_at":"2026-07-05T00:07:24Z"},{"alias_kind":"pith_short_16","alias_value":"T3GUBIFSTCEQ5Z33","created_at":"2026-07-05T00:07:24Z"},{"alias_kind":"pith_short_8","alias_value":"T3GUBIFS","created_at":"2026-07-05T00:07:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:T3GUBIFSTCEQ5Z33G5ORW5SN3G","target":"record","payload":{"canonical_record":{"source":{"id":"1908.08879","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-08-23T15:47:07Z","cross_cats_sorted":[],"title_canon_sha256":"a2411f7cb8ee1c5bf2280e9b1da4ff49b162b29606c7d40d04a4735cd7218af4","abstract_canon_sha256":"85610156ed5f575309fa9beb8eedda5b170f8b27c3fd486df965c305a5127c1d"},"schema_version":"1.0"},"canonical_sha256":"9ecd40a0b298890ee77b375d1b764dd997dd376b8874fb6e3a27a8fcf4274244","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:07:24.536871Z","signature_b64":"RBbR9ZF2dze4ikWKL84PelB9oKm7etxFH76+iDK42FHWwEui2DeDIkyx1vT1knDbXytYdeyvy2dZwK+gzlvdBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9ecd40a0b298890ee77b375d1b764dd997dd376b8874fb6e3a27a8fcf4274244","last_reissued_at":"2026-07-05T00:07:24.536345Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:07:24.536345Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.08879","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:07:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IXOqr5S8J64heRXZrM/BJK6TRM2pHINPIEceQhbzIpjEBO5eCqTrSfta4Ek6Jj1vmfe7pCgocINObx/+8G3AAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T15:32:52.513799Z"},"content_sha256":"2ebb81df53191c95864290fa9a63c314b8e779614b27d92084b949ff9c014917","schema_version":"1.0","event_id":"sha256:2ebb81df53191c95864290fa9a63c314b8e779614b27d92084b949ff9c014917"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:T3GUBIFSTCEQ5Z33G5ORW5SN3G","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Beam quality measurement through off-axis optical vortex","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Agnieszka Popio{\\l}ek-Masajada, Jan Masajada, Mateusz Szatkowski","submitted_at":"2019-08-23T15:47:07Z","abstract_excerpt":"One of the challenges for every optical system is preserving the quality of the used beam, which may be significantly reduced, due to the low condition of used optical elements or their misalignment. There are plenty of methods focused on the correction of the final beam, depending on the used entire optical system. The problem of efficient beam evaluation is just as important. So far, most of the measurements, are based on visual inspection, which is not always enough, especially when the high quality of the beam is required. Novel approaches use structured light to increase beam sensitivity "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.08879","kind":"arxiv","version":2},"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/1908.08879/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":"2026-07-05T00:07:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QFpbJOvDcFHjhy8yushxdVUNww4+pkSy1DBN700v+Z1ExrbUm8Ua8FzMNlxMs6OZ45AJTTWmdQhJU8xVGeppBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T15:32:52.514292Z"},"content_sha256":"3ff3eb6e9405af41db6fab84dde3e9e974cedb6ee9e87a08dd3c938849d21f39","schema_version":"1.0","event_id":"sha256:3ff3eb6e9405af41db6fab84dde3e9e974cedb6ee9e87a08dd3c938849d21f39"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T3GUBIFSTCEQ5Z33G5ORW5SN3G/bundle.json","state_url":"https://pith.science/pith/T3GUBIFSTCEQ5Z33G5ORW5SN3G/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T3GUBIFSTCEQ5Z33G5ORW5SN3G/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":"2026-08-16T15:32:52Z","links":{"resolver":"https://pith.science/pith/T3GUBIFSTCEQ5Z33G5ORW5SN3G","bundle":"https://pith.science/pith/T3GUBIFSTCEQ5Z33G5ORW5SN3G/bundle.json","state":"https://pith.science/pith/T3GUBIFSTCEQ5Z33G5ORW5SN3G/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T3GUBIFSTCEQ5Z33G5ORW5SN3G/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:T3GUBIFSTCEQ5Z33G5ORW5SN3G","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":"85610156ed5f575309fa9beb8eedda5b170f8b27c3fd486df965c305a5127c1d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-08-23T15:47:07Z","title_canon_sha256":"a2411f7cb8ee1c5bf2280e9b1da4ff49b162b29606c7d40d04a4735cd7218af4"},"schema_version":"1.0","source":{"id":"1908.08879","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.08879","created_at":"2026-07-05T00:07:24Z"},{"alias_kind":"arxiv_version","alias_value":"1908.08879v2","created_at":"2026-07-05T00:07:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.08879","created_at":"2026-07-05T00:07:24Z"},{"alias_kind":"pith_short_12","alias_value":"T3GUBIFSTCEQ","created_at":"2026-07-05T00:07:24Z"},{"alias_kind":"pith_short_16","alias_value":"T3GUBIFSTCEQ5Z33","created_at":"2026-07-05T00:07:24Z"},{"alias_kind":"pith_short_8","alias_value":"T3GUBIFS","created_at":"2026-07-05T00:07:24Z"}],"graph_snapshots":[{"event_id":"sha256:3ff3eb6e9405af41db6fab84dde3e9e974cedb6ee9e87a08dd3c938849d21f39","target":"graph","created_at":"2026-07-05T00:07:24Z","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/1908.08879/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"One of the challenges for every optical system is preserving the quality of the used beam, which may be significantly reduced, due to the low condition of used optical elements or their misalignment. There are plenty of methods focused on the correction of the final beam, depending on the used entire optical system. The problem of efficient beam evaluation is just as important. So far, most of the measurements, are based on visual inspection, which is not always enough, especially when the high quality of the beam is required. Novel approaches use structured light to increase beam sensitivity ","authors_text":"Agnieszka Popio{\\l}ek-Masajada, Jan Masajada, Mateusz Szatkowski","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-08-23T15:47:07Z","title":"Beam quality measurement through off-axis optical vortex"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.08879","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":"sha256:2ebb81df53191c95864290fa9a63c314b8e779614b27d92084b949ff9c014917","target":"record","created_at":"2026-07-05T00:07:24Z","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":"85610156ed5f575309fa9beb8eedda5b170f8b27c3fd486df965c305a5127c1d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-08-23T15:47:07Z","title_canon_sha256":"a2411f7cb8ee1c5bf2280e9b1da4ff49b162b29606c7d40d04a4735cd7218af4"},"schema_version":"1.0","source":{"id":"1908.08879","kind":"arxiv","version":2}},"canonical_sha256":"9ecd40a0b298890ee77b375d1b764dd997dd376b8874fb6e3a27a8fcf4274244","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9ecd40a0b298890ee77b375d1b764dd997dd376b8874fb6e3a27a8fcf4274244","first_computed_at":"2026-07-05T00:07:24.536345Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:07:24.536345Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RBbR9ZF2dze4ikWKL84PelB9oKm7etxFH76+iDK42FHWwEui2DeDIkyx1vT1knDbXytYdeyvy2dZwK+gzlvdBg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:07:24.536871Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.08879","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2ebb81df53191c95864290fa9a63c314b8e779614b27d92084b949ff9c014917","sha256:3ff3eb6e9405af41db6fab84dde3e9e974cedb6ee9e87a08dd3c938849d21f39"],"state_sha256":"6ae95953a0e5b312806129d67e37f4f0b7fa71319a726b3e15fd3365823c191f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O1gEpWu3/1U4FkjDVSi/UeRv3tY/eAn6xqwm2qK21uiZvbz1QqOBUmweBNCmOIQQ4STVB4kEthWwKl5/ZOagAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T15:32:52.517639Z","bundle_sha256":"b4d6e7502a621d3c103b986a0e1702a8c1e6f7a9cde0340ef442ef5e81785ee3"}}