{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:VK44BNIR2WY2BDRIW42SPVGZOY","short_pith_number":"pith:VK44BNIR","canonical_record":{"source":{"id":"2001.06523","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2020-01-17T20:29:26Z","cross_cats_sorted":["eess.IV"],"title_canon_sha256":"f5fadcaa06dcaceb9cd41dd58f542a9346379f42daea429db474a3330a2aa049","abstract_canon_sha256":"244784ba0292581d42f8ff9f278d48afef57e8ea94854636857a171b9318d9e1"},"schema_version":"1.0"},"canonical_sha256":"aab9c0b511d5b1a08e28b73527d4d976155148c9ceb94932ed5899a1781d3246","source":{"kind":"arxiv","id":"2001.06523","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.06523","created_at":"2026-07-05T00:34:21Z"},{"alias_kind":"arxiv_version","alias_value":"2001.06523v1","created_at":"2026-07-05T00:34:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.06523","created_at":"2026-07-05T00:34:21Z"},{"alias_kind":"pith_short_12","alias_value":"VK44BNIR2WY2","created_at":"2026-07-05T00:34:21Z"},{"alias_kind":"pith_short_16","alias_value":"VK44BNIR2WY2BDRI","created_at":"2026-07-05T00:34:21Z"},{"alias_kind":"pith_short_8","alias_value":"VK44BNIR","created_at":"2026-07-05T00:34:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:VK44BNIR2WY2BDRIW42SPVGZOY","target":"record","payload":{"canonical_record":{"source":{"id":"2001.06523","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2020-01-17T20:29:26Z","cross_cats_sorted":["eess.IV"],"title_canon_sha256":"f5fadcaa06dcaceb9cd41dd58f542a9346379f42daea429db474a3330a2aa049","abstract_canon_sha256":"244784ba0292581d42f8ff9f278d48afef57e8ea94854636857a171b9318d9e1"},"schema_version":"1.0"},"canonical_sha256":"aab9c0b511d5b1a08e28b73527d4d976155148c9ceb94932ed5899a1781d3246","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:34:21.917582Z","signature_b64":"AqL8AsQGgorcpmgw+UaUL4YFstHXudNmf0ep94tE0Fa5a2dVJUzNM/tc3SBQJATVH+1TleBDj/aLRLc1bsXnCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aab9c0b511d5b1a08e28b73527d4d976155148c9ceb94932ed5899a1781d3246","last_reissued_at":"2026-07-05T00:34:21.917167Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:34:21.917167Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2001.06523","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":"2026-07-05T00:34:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ExVaCq4OgVx9hlhfp/OF3wf+km6s53gyQAPf+7UGFIG5iHgXPD5wrqCygpgtne3wci8JOFVjlBL9gpwH/CdGBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-12T18:07:10.908529Z"},"content_sha256":"dfe518cd05072e56b79e094285add29ecdcc8ec430c9f223bc79414a651ebfec","schema_version":"1.0","event_id":"sha256:dfe518cd05072e56b79e094285add29ecdcc8ec430c9f223bc79414a651ebfec"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:VK44BNIR2WY2BDRIW42SPVGZOY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Large-area, high-NA Multi-level Diffractive Lens via inverse design","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.IV"],"primary_cat":"physics.optics","authors_text":"Beradi Sensale-Rodriguez, Christian Pies, Monjurul Meem, Rajesh Menon, Sourangsu Banerji, Timo Oberbiermann","submitted_at":"2020-01-17T20:29:26Z","abstract_excerpt":"Flat lenses enable thinner, lighter, and simpler imaging systems. However, large-area and high-NA flat lenses have been elusive due to computational and fabrication challenges. Here, we applied inverse design to create a multi-level diffractive lens (MDL) with thickness <1.35{\\mu}m, diameter of 4.13mm, NA=0.9 at wavelength of 850nm. Since the MDL is created in polymer, it can be cost-effectively replicated via imprint lithography."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.06523","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2001.06523/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":"2026-07-05T00:34:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mMijXQQOhUmioy83ZtUWoMxX8FdDvlxqEcVwmxdblpcLVqynzjSmzPNSjLYscXcltjXRRKjaeO4H6HlfeSL3Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-12T18:07:10.908890Z"},"content_sha256":"9b7c8544573b65f94f4c2283d320e57010ce0da8b15fed98fe7607ea27b7924b","schema_version":"1.0","event_id":"sha256:9b7c8544573b65f94f4c2283d320e57010ce0da8b15fed98fe7607ea27b7924b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VK44BNIR2WY2BDRIW42SPVGZOY/bundle.json","state_url":"https://pith.science/pith/VK44BNIR2WY2BDRIW42SPVGZOY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VK44BNIR2WY2BDRIW42SPVGZOY/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":"2026-07-12T18:07:10Z","links":{"resolver":"https://pith.science/pith/VK44BNIR2WY2BDRIW42SPVGZOY","bundle":"https://pith.science/pith/VK44BNIR2WY2BDRIW42SPVGZOY/bundle.json","state":"https://pith.science/pith/VK44BNIR2WY2BDRIW42SPVGZOY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VK44BNIR2WY2BDRIW42SPVGZOY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:VK44BNIR2WY2BDRIW42SPVGZOY","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":"244784ba0292581d42f8ff9f278d48afef57e8ea94854636857a171b9318d9e1","cross_cats_sorted":["eess.IV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2020-01-17T20:29:26Z","title_canon_sha256":"f5fadcaa06dcaceb9cd41dd58f542a9346379f42daea429db474a3330a2aa049"},"schema_version":"1.0","source":{"id":"2001.06523","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.06523","created_at":"2026-07-05T00:34:21Z"},{"alias_kind":"arxiv_version","alias_value":"2001.06523v1","created_at":"2026-07-05T00:34:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.06523","created_at":"2026-07-05T00:34:21Z"},{"alias_kind":"pith_short_12","alias_value":"VK44BNIR2WY2","created_at":"2026-07-05T00:34:21Z"},{"alias_kind":"pith_short_16","alias_value":"VK44BNIR2WY2BDRI","created_at":"2026-07-05T00:34:21Z"},{"alias_kind":"pith_short_8","alias_value":"VK44BNIR","created_at":"2026-07-05T00:34:21Z"}],"graph_snapshots":[{"event_id":"sha256:9b7c8544573b65f94f4c2283d320e57010ce0da8b15fed98fe7607ea27b7924b","target":"graph","created_at":"2026-07-05T00:34:21Z","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/2001.06523/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Flat lenses enable thinner, lighter, and simpler imaging systems. However, large-area and high-NA flat lenses have been elusive due to computational and fabrication challenges. Here, we applied inverse design to create a multi-level diffractive lens (MDL) with thickness <1.35{\\mu}m, diameter of 4.13mm, NA=0.9 at wavelength of 850nm. Since the MDL is created in polymer, it can be cost-effectively replicated via imprint lithography.","authors_text":"Beradi Sensale-Rodriguez, Christian Pies, Monjurul Meem, Rajesh Menon, Sourangsu Banerji, Timo Oberbiermann","cross_cats":["eess.IV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2020-01-17T20:29:26Z","title":"Large-area, high-NA Multi-level Diffractive Lens via inverse design"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.06523","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:dfe518cd05072e56b79e094285add29ecdcc8ec430c9f223bc79414a651ebfec","target":"record","created_at":"2026-07-05T00:34:21Z","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":"244784ba0292581d42f8ff9f278d48afef57e8ea94854636857a171b9318d9e1","cross_cats_sorted":["eess.IV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2020-01-17T20:29:26Z","title_canon_sha256":"f5fadcaa06dcaceb9cd41dd58f542a9346379f42daea429db474a3330a2aa049"},"schema_version":"1.0","source":{"id":"2001.06523","kind":"arxiv","version":1}},"canonical_sha256":"aab9c0b511d5b1a08e28b73527d4d976155148c9ceb94932ed5899a1781d3246","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aab9c0b511d5b1a08e28b73527d4d976155148c9ceb94932ed5899a1781d3246","first_computed_at":"2026-07-05T00:34:21.917167Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:34:21.917167Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AqL8AsQGgorcpmgw+UaUL4YFstHXudNmf0ep94tE0Fa5a2dVJUzNM/tc3SBQJATVH+1TleBDj/aLRLc1bsXnCg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:34:21.917582Z","signed_message":"canonical_sha256_bytes"},"source_id":"2001.06523","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dfe518cd05072e56b79e094285add29ecdcc8ec430c9f223bc79414a651ebfec","sha256:9b7c8544573b65f94f4c2283d320e57010ce0da8b15fed98fe7607ea27b7924b"],"state_sha256":"a30bc3421b8e68a2e5e84cd4f5687d9106d05bc1b543b5441cc2433985564976"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YOTzZfK0Kywyd8VnMDThBeiiC02Ghvvr5/bRm57gnKzgrIl20EgBrNIMEpubFI11mmKHtFa4MkMrgeYZEKsCAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-12T18:07:10.910996Z","bundle_sha256":"69a8ad5fa8f94f6a8bef30c4b86e595d97a3a6e45fa1d99653384f4f923aa2a2"}}