{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:AXHIQ7QFRNOUU5Q7QBW7WZYQYI","short_pith_number":"pith:AXHIQ7QF","schema_version":"1.0","canonical_sha256":"05ce887e058b5d4a761f806dfb6710c218efe4e95bd3747035616a44389995a4","source":{"kind":"arxiv","id":"1605.08033","version":1},"attestation_state":"computed","paper":{"title":"A Mach-Zehnder interferometer based on orbital angular momentum for improved vortex coronagraph efficiency","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"physics.optics","authors_text":"C. Delacroix, D. Mawet, E. Huby, J. Surdej, M. Karlsson ad G. Ruane, O. Absil, P. Piron, S. Habraken","submitted_at":"2016-05-25T08:00:53Z","abstract_excerpt":"The Annular Groove Phase Mask (AGPM) is a vectorial vortex phase mask. It acts as a half-wave plate with a radial fast axis orientation operating in the mid infrared domain. When placed at the focus of a telescope element provides a continuous helical phase ramp for an on axis sources, which creates the orbital angular momentum. Thanks to that phase, the intensity of the central source is canceled by a down-stream pupil stop, while the off axis sources are not affected. However due to experimental conditions the nulling is hardly perfect. To improve the null, a Mach-Zehnder interferometer cont"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1605.08033","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-05-25T08:00:53Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"de9a986063ee843faed3879fa4abc3dd9944c7e4e1c134093d4de83fde94ddad","abstract_canon_sha256":"4f432c4923641f12188d06020c2a12ff246a82ecd80490589771cf39153b9ab6"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:13:37.293042Z","signature_b64":"GC0+am3XWLqCSDtcxXeKVFQgnW7yTs7qx26pzVqXPh54uZKkE/MdqYK5CT4rXtkMtARrG7W/jrBGv2IfdRGpDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"05ce887e058b5d4a761f806dfb6710c218efe4e95bd3747035616a44389995a4","last_reissued_at":"2026-05-18T01:13:37.292415Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:13:37.292415Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A Mach-Zehnder interferometer based on orbital angular momentum for improved vortex coronagraph efficiency","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"physics.optics","authors_text":"C. Delacroix, D. Mawet, E. Huby, J. Surdej, M. Karlsson ad G. Ruane, O. Absil, P. Piron, S. Habraken","submitted_at":"2016-05-25T08:00:53Z","abstract_excerpt":"The Annular Groove Phase Mask (AGPM) is a vectorial vortex phase mask. It acts as a half-wave plate with a radial fast axis orientation operating in the mid infrared domain. When placed at the focus of a telescope element provides a continuous helical phase ramp for an on axis sources, which creates the orbital angular momentum. Thanks to that phase, the intensity of the central source is canceled by a down-stream pupil stop, while the off axis sources are not affected. However due to experimental conditions the nulling is hardly perfect. To improve the null, a Mach-Zehnder interferometer cont"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.08033","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1605.08033","created_at":"2026-05-18T01:13:37.292515+00:00"},{"alias_kind":"arxiv_version","alias_value":"1605.08033v1","created_at":"2026-05-18T01:13:37.292515+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.08033","created_at":"2026-05-18T01:13:37.292515+00:00"},{"alias_kind":"pith_short_12","alias_value":"AXHIQ7QFRNOU","created_at":"2026-05-18T12:30:07.202191+00:00"},{"alias_kind":"pith_short_16","alias_value":"AXHIQ7QFRNOUU5Q7","created_at":"2026-05-18T12:30:07.202191+00:00"},{"alias_kind":"pith_short_8","alias_value":"AXHIQ7QF","created_at":"2026-05-18T12:30:07.202191+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/AXHIQ7QFRNOUU5Q7QBW7WZYQYI","json":"https://pith.science/pith/AXHIQ7QFRNOUU5Q7QBW7WZYQYI.json","graph_json":"https://pith.science/api/pith-number/AXHIQ7QFRNOUU5Q7QBW7WZYQYI/graph.json","events_json":"https://pith.science/api/pith-number/AXHIQ7QFRNOUU5Q7QBW7WZYQYI/events.json","paper":"https://pith.science/paper/AXHIQ7QF"},"agent_actions":{"view_html":"https://pith.science/pith/AXHIQ7QFRNOUU5Q7QBW7WZYQYI","download_json":"https://pith.science/pith/AXHIQ7QFRNOUU5Q7QBW7WZYQYI.json","view_paper":"https://pith.science/paper/AXHIQ7QF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1605.08033&json=true","fetch_graph":"https://pith.science/api/pith-number/AXHIQ7QFRNOUU5Q7QBW7WZYQYI/graph.json","fetch_events":"https://pith.science/api/pith-number/AXHIQ7QFRNOUU5Q7QBW7WZYQYI/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/AXHIQ7QFRNOUU5Q7QBW7WZYQYI/action/timestamp_anchor","attest_storage":"https://pith.science/pith/AXHIQ7QFRNOUU5Q7QBW7WZYQYI/action/storage_attestation","attest_author":"https://pith.science/pith/AXHIQ7QFRNOUU5Q7QBW7WZYQYI/action/author_attestation","sign_citation":"https://pith.science/pith/AXHIQ7QFRNOUU5Q7QBW7WZYQYI/action/citation_signature","submit_replication":"https://pith.science/pith/AXHIQ7QFRNOUU5Q7QBW7WZYQYI/action/replication_record"}},"created_at":"2026-05-18T01:13:37.292515+00:00","updated_at":"2026-05-18T01:13:37.292515+00:00"}