Publications

REVIEWED PUBLICATIONS

  1. T. Hoshino, T. Issei, I. Naoki, & N. Hagen, “Snapshot spectral fringe projection profilometry,” Appl. Opt. 65: 3615-3623 (2026).
  2. N. Hagen, Y. Yamamoto, & R. Ranjan, “Wide spectral imaging of the rainbow from ultraviolet to infrared and locating the spectral limits of the rainbow,” Appl. Opt. 65: 2457-2467 (2026).
  3. L. Garza-Soto & N. Hagen, “The geometric phase of rotations and 3D coordinate transformations,” J. Opt. Soc. Am. A 43: 385-393 (2026).
  4. N. Hagen, “Abbe’s dispersion model and glass chart,” Opt. Eng. 64: 100401 (2025).
  5. N. Hagen, “Real-time quantification of gas leaks using a snapshot infrared spectral imager,” Sensors 25: 538 (2025).
  6. N. Hagen & L. Garza-Soto, “Evolution of geometric phase and explaining the geodesic rule,” J. Opt. Soc. Am. A 41: 2014-2022 (2024).
  7. N. Hagen, T. Stockmans, Y. Otani, & P. Buranasiri, “Fourier domain filtering method for color polarization camera demosaicking,” Appl. Opt. 63: 2314-2323 (2024).
  8. L. Garza-Soto, N, Hagen, D. Lopez-Mago, & Y. Otani, “Differences between the geometric phase and propagation phase: clarifying the boundedness problem,” Appl. Opt. 63: 645-653 (2024).
  9. L. Garza-Soto, N, Hagen, & D. Lopez-Mago, “Deciphering Pancharatnam’s discovery of geometric phase: a retrospective,” J. Opt. Soc. Am. A 40: 925-931 (2023).
  10. L. Garza-Soto, N, Hagen, D. Lopez-Mago, & Y. Otani, “Wave description of geometric phase,” J. Opt. Soc. Am. A 40: 388-396 (2023).
  11. N. Hagen, “Review of thermal infrared polarimetry, II: experiment,” Opt. Eng. 61: 080901 (2022).
  12. N. Hagen, “Review of thermal infrared polarimetry, I: theory,” Opt. Eng. 61: 070902 (2022).
  13. N. Hagen, K. Yoshida, Y. Shan, & Y. Otani, “Apophyllite waveplates,” Appl. Opt. 61: 6518-6526 (2022).
  14. N. Hagen, “Design of channeled spectropolarimeters,” Appl. Opt. 61: 3381-3389 (2022).
  15. Y. Maeda, S. Shibata, N. Hagen, & Y. Otani, “Single-shot 3D profilometry using a color imaging polarimeter,” Opt. Eng. 60: 124115 (2021).
  16. Y. Maeda, S. Shibata, N. Hagen, & Y. Otani, “Birefringence compensation for single‐shot 3D profilometry using a full‐Stokes imaging polarimeter,” Opt. Review 28: 425-433 (2021).
  17. W. Takano, S. Shibata, N. Hagen, M. Matsuda, & Y. Otani, “Minimizing scattering-induced quantitative phase errors in differential interference contrast microscope measurements,” J. Biomed. Opt. 25: 123703 (2020).
  18. N. Hagen, “Dynamic radiometric calibration and radiometric matching of multiple microbolometer detector arrays,” Proc. SPIE 11502-20 (2020).
  19. B. Chrysler, Y. Otani, & N. Hagen, “Dynamic calibration of a channeled spectropolarimeter for extended temperature stability,” Appl. Opt. 59: 9424–9433 (2020).
  20. N. Hagen, “Survey of autonomous gas leak detection and quantification with snapshot infrared spectral imaging,” J. Optics 22: 103001 (2020).
  21. N. Hagen, P. Buranasiri, & Y. Otani, “Compensating for nonlinear dispersion in channeled spectropolarimetry,” Appl. Opt 59: 5032–5040 (2020).
  22. Y. Maeda, S. Shibata, N. Hagen, & Y. Otani, “Single shot 3D profilometry by polarization pattern projection,” Appl. Opt. 59: 1654–1659 (2020).
  23. N. Hagen, P. Buranasiri, & Y. Otani, “Alignment of polarization components,” Appl. Opt 58: 9750–9756 (2019).
  24. S. Shibata, M. Suzuki, N. Hagen, & Y. Otani, “Video-rate imaging full-Stokes polarimeter using two polarization cameras,” Opt. Eng. 58: 103103 (2019).
  25. N. Hagen, S. Shibata, & Y. Otani “Generating high-performance polarization measurements with low-performance polarizers: demonstration with a microgrid polarization camera,” Opt. Eng. 58: 080501 (2019).
  26. S. Shibata, N. Hagen, S. Kawabata, & Y. Otani, “Compact and high-speed Stokes polarimeter using three-way polarization-preserving beam splitters,” Appl. Opt 58: 5644–5649 (2019).
  27. N. Hagen, S. Shibata, & Y. Otani, “Calibration and performance assessment of microgrid polarization cameras,” Opt. Eng. 58: 082408 (2019).
  28. S. Shibata, W. Takano, N. Hagen, M. Matsuda, & Y. Otani, “Video-rate quantitative phase analysis by a DIC microscope using a polarization camera,” Biomed. Opt. Express 10: 1273–1281 (2019). [Errata: Biomed. Opt. Express 10: 2967–2968 (2019).]
  29. S. Shibata, N. Hagen, & Y. Otani, “Robust full Stokes imaging polarimeter with dynamic calibration,” Opt. Lett 44: 891–894 (2019).
  30. N. Hagen, “Sensitivity limits on optical gas imaging due to air turbulence,” Opt. Eng. 57: 114102 (2018).
  31. N. Hagen, “Statistics of normalized Stokes polarization parameters,” Appl. Opt. 57: 5356–5363 (2018).
  32. N. Hagen & Y. Otani, “Stokes polarimeter performance: general noise model and analysis,” Appl. Opt. 57: 4283–4296 (2018).
  33. N. Hagen, “Passive imaging of wind surface flow using an infrared camera,” Infrared Phys. Tech. 87: 47–54 (2017).
  34. S. Konecky, R. Wilson, N. Hagen, A. Mazhar, T. Tkaczyk, R. Frostig, & B. Tromberg, “Hyperspectral optical tomography of intrinsic signals in the rat cortex,” Neurophotonics 2: 045003 (2015).
  35. N. Hagen, “Flatfield correction errors due to spectral mismatching,” Opt. Eng. 53: 123107 (2014).
  36. N. Hagen, “Bibulous — a drop-in BibTeX replacement based on style templates,” TUGboat — Commun. TeX Users Group 34: 332–339 (2013).
  37. N. Hagen & M. Kudenov, “Review of snapshot spectral imaging technologies,” Opt. Eng. 52: 090901 (2013).
  38. D. Marks, N. Hagen, M. Durham, & D. Brady, “Wide-field compact catadioptric telescope spanning 0.7–14 µm wavelengths,” Appl. Opt. 52: 4334–4342 (2013).
  39. N. Bedard, N. Hagen, L. Gao, & T. Tkaczyk, “Image mapping spectrometry: calibration and characterization,” Opt. Eng. 51: 111711 (2012).
  40. N. Hagen, R. Kester, L. Gao, & T. Tkaczyk, “Snapshot advantage: a review of the light collection improvement for parallel high-dimensional measurement systems,” Opt. Eng. 51: 111702 (2012).
  41. L. Gao, N. Hagen, R. Kester, & T. Tkaczyk, “Quantitative comparison between full-spectrum and filter-based imaging in hyperspectral fluorescence microscopy,” J. Microscopy 246: 113–123 (2012).
  42. M. Kudenov, M. Escuti, N. Hagen, E. Dereniak, & K. Oka, “Snapshot imaging Mueller matrix polarimeter using polarization gratings,” Opt. Lett. 37: 1367–1369 (2012).
  43. N. Hagen & T. Tkaczyk, “Foveated endoscopic lens,” J. Biomed. Opt. 17: 021104 (2012).
  44. N. Hagen, L. Gao, & T. Tkaczyk, “Quantitative sectioning and noise analysis for structured illumination microscopy,” Opt. Express 20: 403–413 (2012). [Errata: Opt. Express 20: 5343 (2012), Opt. Express 23: 27633–27634 (2015).]
  45. N. Hagen & T. Tkaczyk, “Compound prism design principles, III: linear-in-wavenumber and OCT prisms,” Appl. Opt. 50: 5023–5030 (2011).
  46. N. Hagen & T. Tkaczyk, “Compound prism design principles, II: triplet and Janssen prisms,” Appl. Opt. 50: 5012–5022 (2011).
  47. N. Hagen & T. Tkaczyk, “Compound prism design principles, I,” Appl. Opt. 50: 4998–5011 (2011).
  48. L. Gao, N. Bedard, N. Hagen, R. Kester, & T. Tkaczyk, “Depth-resolved image mapping spectrometer [IMS] with structured illumination,” Opt. Express 19: 17439–17452 (2011).
  49. L. Gao, R. Kester, N. Hagen, & T. Tkaczyk, “Snapshot Image Mapping Spectrometer [IMS] with high sampling density for hyperspectral microscopy,” Opt. Express 18: 14330–14344 (2010).
  50. N. Zheng, N. Hagen, & D. Brady, “Analytic-domain lens design with proximate ray tracing,” J. Opt. Soc. Am. A 27: 1791-1802 (2010).
  51. D. Brady & N. Hagen, “Multiscale lens design,” Opt. Express 17: 10659–10674 (2009).
  52. N. Hagen & E. Dereniak, “Gaussian profile estimation in two dimensions,” Appl. Opt. 47: 6842–6851 (2008).
  53. N. Hagen & E. Dereniak, “Analysis of computed tomographic imaging spectrometers. I. Spatial and spectral resolution,” Appl. Opt. 47: F85–F95 (2008).
  54. M. Kudenov, N. A. Hagen, E. Dereniak, & G. Gerhart, “Fourier transform channeled spectropolarimetry in the MWIR,” Opt. Express 15: 12792–12805 (2007).
  55. N. Hagen, K. Oka, & E. Dereniak, “Snapshot Mueller matrix spectropolarimeter,” Opt. Lett. 32: 2100–2102 (2007). [Errata: Opt. Letters 38: 1675 (2013).]
  56. N. Hagen, M. Kupinski, & E. Dereniak, “Gaussian profile estimation in one dimension,” Appl. Opt. 46: 5374–5383 (2007).
  57. H. Luo, K. Oka, N. Hagen, T. Tkaczyk, & E. Dereniak, “Modeling and optimization for a prismatic snapshot imaging polarimeter,” Appl. Opt. 45: 8400–8409 (2006).

SELECTED UNREVIEWED PUBLICATIONS

  1. N. Hagen, “Writing English with Chinese characters: an eccentric view of what the written Japanese language is like,” LingBuzz Linguistics Archive (2024).
  2. N. Hagen, “Graduate education in optics in Japan and the United States: impact of funding levels on educational structure,” arXiv:2401.08933 (2024).
  3. N. Hagen, “Spectra, images, simple functions, and density functions,” WHISPERS 2021: 11th IEEE GRSS Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (2021).
  4. N. Hagen, “The problem of scientific greatness and the role of ordinary scientists,” arXiv:2003.05894 (2020).
  5. N. Hagen, “Manufacturing image slicing and image mapping mirrors,” Transactions of the 13th MIRAI Conference on Microfabrication and Green Technology 8 [2] p.1–6 [Morioka, 2020].
  6. N. Hagen, “Review boards for scientific publishing,” J. Scholarly Publishing 49: 419–434 (2018).
  7. N. Hagen, “Bibulous — a drop-in BibTeX replacement based on style templates,” TUGboat — Commun. TeX Users Group 34: 332–339 (2013).

PUBLICATIONS IN JAPANESE

  1. ネイザン・ヘーガン, 「市販のハイパースペクトルカメラに用いられる測定方式と特徴」 光学, 53(12): ?-? (2024).
  2. ネイザン・ヘーガン, 「日本とアメリカの光学教育：資源調達レベルの教育構造に与える影響」 光学, 52 (12): 519-521 (2023).
  3. ネイザン・ヘーガン, 「質問したりアクティブに学べば，その後の信用が得られる」 O plus E, 43 (9): 469-473 (2021).
  4. ネイザン・ヘーガン, 柴田秀平, 大谷幸利, 「生物学の偏光イメージング」 O plus E, 42 [4]: 510–516 [July/August 2020]. [N. Hagen, S. Shibata, and Y. Otani, “Polarization imaging for biology,” O plus E magazine]
  5. 大谷幸利, 前田勇樹, 柴田秀平, ネイザン・ヘーガン, 「偏光パターン投影による瞬間三次元形状計測」 光技術コンタクト, 58 [6]: 32–39 [June 2020]. [Y. Otani, Y. Maeda, S. Shibata, and N. Hagen, “Snapshot three-dimensional shape measurement by polarization pattern projection,” Optical Instr. Contact magazine]
  6. ネイザン・ヘーガン, 「赤外イメージングの動向と自動車応用」 Optronics 38 [10]: 79–82 [October 2019]. [N. Hagen, “Trends in infrared imaging and automotive applications,” Optronics magazine]
  7. ネイザン・ヘーガン, 「偏光カメラとその応用」 映像情報インダストリアル, 51 [2]: 25–30 [March/April 2019]. [Y. Otani and N. Hagen, “Polarization cameras and their applications,” Video Information Industrial magazine]
  8. ネイザン・ヘーガン, 「スナップショット赤外線分光イメージングによるガス検出とその定量化」 O plus E 40 [5]: 579–584 [July 2018]. [N. Hagen, “Video detection and quantification of gas with snapshot infrared spectral imaging,” O plus E magazine]
  9. ネイザン・ヘーガン, 「流れを可視化するための微小温度イメージング」 O plus E 40 [5]: 593–597 [July 2018]. [N. Hagen, “Imaging microthermal dynamics for flow visualization,” O plus E magazine]

PATENTS

  1. US 12492987: R. Kester, N. Hagen, & R. Mallery, “Gas leak emission quantification with a gas cloud imager” (2025).
  2. US 12411042: R. Kester & N. Hagen, “Divided-aperture infra-red spectral imaging system” (2025).
  3. US 12326430: R. Kester & N. Hagen, “Hydrogen sulfide imaging system” (2025).
  4. US 12326371: R. Kester & N. Hagen, “Divided-aperture infra-red spectral imaging system” (2025).
  5. US 12316995: R. Kester & N. Hagen, “Mobile gas and chemical imaging camera” (2025).
  6. US 11917321: R. Kester & N. Hagen, “Mobile gas and chemical imaging camera” (2024).
  7. US 11879775: R. Kester & N. Hagen, “Divided-aperture infra-red spectral imaging system” (2024).
  8. US 11867564: R. Kester & N. Hagen, “Divided-aperture infra-red spectral imaging system” (2024).
  9. US 11846619: R. Kester & N. Hagen, “Hydrogen sulfide imaging system” (2023).
  10. US 11805221: R. Kester & N. Hagen, “Dual-band divided-aperture infra-red spectral imaging system” (2023).
  11. US 11796454: R. Kester, N. Hagen, & R. Mallery, “Gas leak emission quantification with a gas cloud imager” (2023).
  12. US 11326957: R. Kester & N. Hagen, “Divided-aperture infra-red spectral imaging system” (2022).
  13. US 11313724: R. Kester & N. Hagen, “Divided-aperture infra-red spectral imaging system for chemical detection” (2022).
  14. US 11290662: R. Kester & N. Hagen, “Mobile gas and chemical imaging camera” (2022).
  15. US 11287409: R. Kester & N. Hagen, “Hydrogen sulfide imaging system” (2022).
  16. JP J1029609: Y. Otani, S. Shibata, & N. Hagen, 偏光測定装置及び偏光測定方法 [“Full Stokes video camera with two polarization cameras”] (2022).
  17. US 10914639: R. Kester & N. Hagen, “Divided-aperture infra-red spectral imaging system” (2021).
  18. US 10914632: R. Kester & N. Hagen, “Divided-aperture infra-red spectral imaging system” (2021).
  19. US 10989597: R. Kester & N. Hagen, “Divided aperture infra-red spectral imaging system for chemical detection” (2021).
  20. US 10893220: R. Kester & N. Hagen, “Dual-band divided aperture infra-red spectral imaging system” (2021).
  21. US 10834338: R. Kester & N. Hagen, “Mobile gas and chemical imaging camera” (2020).
  22. JP 2017-193645: N. Hagen, K. Miyazaki, S. Yamashita, & Y. Otani, 気流測定装置 [“Flow measurement instrument”].
  23. US 10648960: R. Kester & N. Hagen, “Hydrogen sulfide imaging system” (2020).
  24. US 10458905: R. Kester, N. Hagen, & R. Mallery, “Gas leak emission quantification with a gas cloud imager” (2019).
  25. US 10444070: R. Kester & N. Hagen, “Divided-aperture infra-red spectral imaging system” (2019).
  26. US 10375327: R. Kester & N. Hagen, “Mobile gas and chemical imaging camera” (2019).
  27. US 10267686: R. Kester & N. Hagen, “Divided aperture infra-red spectral imaging system” (2019).
  28. US 10254166: R. Kester & N. Hagen, “Divided aperture infra-red spectral imaging system for chemical detection” (2019).
  29. US 10084975: R. Kester & N. Hagen, “Mobile gas and chemical imaging camera” (2018).
  30. US 9756263: R. Kester & N. Hagen, “Mobile gas and chemical imaging camera” (2017).
  31. US 9625318: R. Kester & N. Hagen, “Divided-aperture infra-red spectral imaging system for chemical detection,” (2017).
  32. US 9599508: R. Kester & N. Hagen, “Divided aperture infra-red spectral imaging system” (2017).
  33. US 9562849: R. Kester & N. Hagen, “Divided aperture infra-red spectral imaging system” (2017).
  34. US 9507129: D. Marks, D. Brady, & N. Hagen, “Apparatus comprising a compact catadioptric telescope” (2016).
  35. US 8259212: D. Brady, N. Hagen, & S. McCain, “Multiscale optical system” (2012).