{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:3S554HLE7YGYCDBM6F3T6TD43U","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":"20e16896c3c00148fefc6e458f5ff02cdb5b8578500c956adbfd41c27b1ab8ae","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2016-01-16T21:22:22Z","title_canon_sha256":"5227a2137fe78610ee34c9fed137a2ebcc40847cc9cc9edeb460601e52e7bb2b"},"schema_version":"1.0","source":{"id":"1601.04698","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.04698","created_at":"2026-05-18T01:22:31Z"},{"alias_kind":"arxiv_version","alias_value":"1601.04698v1","created_at":"2026-05-18T01:22:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.04698","created_at":"2026-05-18T01:22:31Z"},{"alias_kind":"pith_short_12","alias_value":"3S554HLE7YGY","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3S554HLE7YGYCDBM","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3S554HLE","created_at":"2026-05-18T12:29:55Z"}],"graph_snapshots":[{"event_id":"sha256:e46104c2191a473c9c8c2fa0235c7e45bccf41560546a90d8ad65d79ec7dc624","target":"graph","created_at":"2026-05-18T01:22:31Z","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":"This paper presents a motion-free technique for characterizing the focal length of any spherical convex or concave lens. The measurement system uses a Gaussian Beam from a Laser Source (LS), an Electronically Controlled Variable Focus Lens (ECVFL), a Digital Micromirror Device (DMD) and a Photo-Detector (PD). As the proposed method does not involve any motion-stages or other moving components, the focal length is measured without requiring any mechanical motion of bulk components. The method requires measuring the spot size of the Gaussian Beam at the DMD plane for various settings of the ECVF","authors_text":"Arslan Anjum, Syed Azer Reza","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2016-01-16T21:22:22Z","title":"A Technique to Measure Focal Length of a Lens with no Bulk Motion using Tunable Optics and Optical MEMS Technology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.04698","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:b600248e3280c3ebf9272a0e43b34c07b6f330e21fa3ae7df83a45be61b11201","target":"record","created_at":"2026-05-18T01:22:31Z","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":"20e16896c3c00148fefc6e458f5ff02cdb5b8578500c956adbfd41c27b1ab8ae","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2016-01-16T21:22:22Z","title_canon_sha256":"5227a2137fe78610ee34c9fed137a2ebcc40847cc9cc9edeb460601e52e7bb2b"},"schema_version":"1.0","source":{"id":"1601.04698","kind":"arxiv","version":1}},"canonical_sha256":"dcbbde1d64fe0d810c2cf1773f4c7cdd031f36ec044a13d99be2525f3c2b0288","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dcbbde1d64fe0d810c2cf1773f4c7cdd031f36ec044a13d99be2525f3c2b0288","first_computed_at":"2026-05-18T01:22:31.977652Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:22:31.977652Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CfuBOd41xwK3E1/b+sEFVaj1O9clJey8pGlAP59878f5qXd5QquOTBehLsE6ulU9wDP9l6fyfJJxvFm5G6ZCDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:22:31.978202Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.04698","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b600248e3280c3ebf9272a0e43b34c07b6f330e21fa3ae7df83a45be61b11201","sha256:e46104c2191a473c9c8c2fa0235c7e45bccf41560546a90d8ad65d79ec7dc624"],"state_sha256":"a3bdb8c1820ff9b70c561995e9ad96589b290afac97636a95665a73a8458a507"}