{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:4ON2FIDK6PUB62LENQQEOI4B46","short_pith_number":"pith:4ON2FIDK","schema_version":"1.0","canonical_sha256":"e39ba2a06af3e81f69646c20472381e7919f072e434b2aea88c6a926475faa2a","source":{"kind":"arxiv","id":"1601.03129","version":1},"attestation_state":"computed","paper":{"title":"Generation of perfect vortex of variable size and its effect in angular spectrum of the down-converted photons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"A. Aadhi, G. K. Samanta, M. V. Jabir, N. Apurv Chaitanya","submitted_at":"2016-01-13T05:09:08Z","abstract_excerpt":"The perfect vortex is a new class of optical vortex beam having ring radius independent of its topological charge (order). One of the simplest techniques to generate such beams is the Fourier transformation of the Bessel-Gauss beam. The variation in ring radius of such vortices require Fourier lenses of different focal lengths and or complicated imaging setup. Here we report a novel experimental scheme to generate perfect vortex of any ring radius using a convex lens and an axicon. As a proof of principle, using a lens of focal length f=200mm, we have varied the radius of the vortex beam acros"},"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":"1601.03129","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-01-13T05:09:08Z","cross_cats_sorted":[],"title_canon_sha256":"ea4e11221f6abcae38578f6375100568d0699844f46353d900aa293d0e15a7e2","abstract_canon_sha256":"74a72485a35b91dd86e5d630429bf2df48461a4e58e33580c39a5009d4b8ac63"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:22:55.307979Z","signature_b64":"XF8B8CioVFdbabXSiS/usv5Ug1/gyHIdOY+r9x7D2pSnIWMTKVbVXoz/VnOvbjvuf9+PhE8XuZOlz1c7oLgkAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e39ba2a06af3e81f69646c20472381e7919f072e434b2aea88c6a926475faa2a","last_reissued_at":"2026-05-18T01:22:55.307360Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:22:55.307360Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Generation of perfect vortex of variable size and its effect in angular spectrum of the down-converted photons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"A. Aadhi, G. K. Samanta, M. V. Jabir, N. Apurv Chaitanya","submitted_at":"2016-01-13T05:09:08Z","abstract_excerpt":"The perfect vortex is a new class of optical vortex beam having ring radius independent of its topological charge (order). One of the simplest techniques to generate such beams is the Fourier transformation of the Bessel-Gauss beam. The variation in ring radius of such vortices require Fourier lenses of different focal lengths and or complicated imaging setup. Here we report a novel experimental scheme to generate perfect vortex of any ring radius using a convex lens and an axicon. As a proof of principle, using a lens of focal length f=200mm, we have varied the radius of the vortex beam acros"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.03129","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":"1601.03129","created_at":"2026-05-18T01:22:55.307443+00:00"},{"alias_kind":"arxiv_version","alias_value":"1601.03129v1","created_at":"2026-05-18T01:22:55.307443+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.03129","created_at":"2026-05-18T01:22:55.307443+00:00"},{"alias_kind":"pith_short_12","alias_value":"4ON2FIDK6PUB","created_at":"2026-05-18T12:29:58.707656+00:00"},{"alias_kind":"pith_short_16","alias_value":"4ON2FIDK6PUB62LE","created_at":"2026-05-18T12:29:58.707656+00:00"},{"alias_kind":"pith_short_8","alias_value":"4ON2FIDK","created_at":"2026-05-18T12:29:58.707656+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/4ON2FIDK6PUB62LENQQEOI4B46","json":"https://pith.science/pith/4ON2FIDK6PUB62LENQQEOI4B46.json","graph_json":"https://pith.science/api/pith-number/4ON2FIDK6PUB62LENQQEOI4B46/graph.json","events_json":"https://pith.science/api/pith-number/4ON2FIDK6PUB62LENQQEOI4B46/events.json","paper":"https://pith.science/paper/4ON2FIDK"},"agent_actions":{"view_html":"https://pith.science/pith/4ON2FIDK6PUB62LENQQEOI4B46","download_json":"https://pith.science/pith/4ON2FIDK6PUB62LENQQEOI4B46.json","view_paper":"https://pith.science/paper/4ON2FIDK","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1601.03129&json=true","fetch_graph":"https://pith.science/api/pith-number/4ON2FIDK6PUB62LENQQEOI4B46/graph.json","fetch_events":"https://pith.science/api/pith-number/4ON2FIDK6PUB62LENQQEOI4B46/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4ON2FIDK6PUB62LENQQEOI4B46/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4ON2FIDK6PUB62LENQQEOI4B46/action/storage_attestation","attest_author":"https://pith.science/pith/4ON2FIDK6PUB62LENQQEOI4B46/action/author_attestation","sign_citation":"https://pith.science/pith/4ON2FIDK6PUB62LENQQEOI4B46/action/citation_signature","submit_replication":"https://pith.science/pith/4ON2FIDK6PUB62LENQQEOI4B46/action/replication_record"}},"created_at":"2026-05-18T01:22:55.307443+00:00","updated_at":"2026-05-18T01:22:55.307443+00:00"}