Dr. Hans I. Bjelkhagen Profile

Dr. Hans I. Bjelkhagen

Consultant at Hansholo Consulting Ltd

SPIE Involvement:

Conference Program Committee | Editor | Author | Instructor

Publications (45)

Proceedings Article | 15 May 2017 Presentation + Paper

Museum applications of ultra-realistic imaging and OptoClones

Hans Bjelkhagen

Proceedings Volume 10233, 1023305 (2017) https://doi.org/10.1117/12.2264228

KEYWORDS: RGB color model, Holograms, Holography, Light sources, LED displays, Light emitting diodes, 3D displays, Solid state lasers

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Proceedings Article | 7 March 2016 Paper

Ultra-realistic imaging and OptoClones

Hans Bjelkhagen, Alkiviadis Lembessis, Andreas Sarakinos

Proceedings Volume 9771, 977105 (2016) https://doi.org/10.1117/12.2207524

KEYWORDS: Holograms, Holography, Stereoscopy, LED displays, Light emitting diodes, Solid state lasers, Solid state physics, Continuous wave operation, Light sources, Light, Photopolymers, RGB color model, Manufacturing, Eye

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SPIE Journal Paper | 19 May 2014

Ultrarealistic imaging: the future of display holography

Hans Bjelkhagen, David Brotherton-Ratcliffe

OE, Vol. 53, Issue 11, 112310, (May 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.11.112310

KEYWORDS: Holograms, Holography, Digital holography, Printing, Light emitting diodes, Analog electronics, RGB color model, Manufacturing, Holographic materials, Pulsed laser operation

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Proceedings Article | 25 February 2014 Paper

Ultra-realistic imaging: a new beginning for display holography

Hans Bjelkhagen, David Brotherton-Ratcliffe

Proceedings Volume 9006, 900603 (2014) https://doi.org/10.1117/12.2036283

KEYWORDS: Holograms, Holography, Digital holography, Light emitting diodes, Printing, Manufacturing, RGB color model, Cameras, Photopolymers, Light

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Proceedings Article | 25 February 2014 Paper

Color optical biopsy

Ardieshir Osanlou, Hans Bjelkhagen, Emma Snashall, Orod Osanlou, Rostam Osanlou

Proceedings Volume 9006, 90060F (2014) https://doi.org/10.1117/12.2038635

KEYWORDS: Biopsy, Holography, Phase modulation, Holograms, RGB color model, 3D image reconstruction, Tissue optics, Polarization, Biomedical optics, Endoscopy

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Proceedings Article | 1 March 2013 Paper

Color holography: recent improvements and applications

Hans Bjelkhagen

Proceedings Volume 8644, 86440L (2013) https://doi.org/10.1117/12.2001115

KEYWORDS: Holograms, Holography, Digital holography, Light emitting diodes, RGB color model, Printing, Photopolymers, Semiconductor lasers, Cameras, Manufacturing

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SPIE Journal Paper | 1 September 2011 Open Access

Special Section Guest Editorial: Digital Holography and Holographic Displays

Hans Bjelkhagen

OE, Vol. 50, Issue 09, 091301, (September 2011) https://doi.org/10.1117/12.10.1117/1.3622483

KEYWORDS: Holography, Holograms, Digital holography, Computing systems, Holographic interferometry, Holographic optical elements, Computer generated holography, 3D image processing, Electronic components, Spatial frequencies

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Proceedings Article | 7 February 2011 Paper

Color holography for museums: bringing the artifacts back to the people

Hans Bjelkhagen, Ardie Osanlou

Proceedings Volume 7957, 79570B (2011) https://doi.org/10.1117/12.872101

KEYWORDS: Holograms, Holography, RGB color model, Bone, Silver, Photography, Continuous wave operation, Stereoscopy, 3D image processing, Imaging technologies

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Proceedings Article | 25 January 2008 Paper

Fabrication of ultra-fine-grain silver halide recording material for color holography

H. Bjelkhagen, P. Crosby, D. Green, E. Mirlis, N. Phillips

Proceedings Volume 6912, 691209 (2008) https://doi.org/10.1117/12.765404

KEYWORDS: Silver, Holography, Holograms, Photography, Crystals, Coating, Holographic materials, Holographic optical elements, Glasses, Manufacturing

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Proceedings Article | 9 June 2006 Paper

Color holography: its history, state-of-the-art, and future

Hans Bjelkhagen

Proceedings Volume 6252, 62521U (2006) https://doi.org/10.1117/12.677173

KEYWORDS: Holograms, Holography, Silver, Manufacturing, Laser sources, Photopolymers, 3D displays, Wavefronts, Pulsed laser operation, 3D image reconstruction

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Proceedings Article | 21 April 2005 Paper

Selection of optimum wavelengths for holography recording

Evangelos Mirlis, Hans Bjelkhagen, Martin Turner

Proceedings Volume 5742, (2005) https://doi.org/10.1117/12.583224

KEYWORDS: Holography, Laser sources, Holograms, Optical simulations, Visible radiation, Light, Reflectivity, Mathematical modeling, Color reproduction, 3D image reconstruction

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Proceedings Article | 29 June 2004 Paper

Modeling the Lippmann color process

Marc Jager, Hans Bjelkhagen, Martin Turner

Proceedings Volume 5290, (2004) https://doi.org/10.1117/12.532622

KEYWORDS: Photography, Light scattering, Refractive index, Modulation, Radiative transfer, Scattering, Absorption, Reflectors, Reflectivity, Mie scattering

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Proceedings Article | 9 July 2002 Paper

Super-realistic imaging based on color holography and Lippmann photography

Hans Bjelkhagen

Proceedings Volume 4737, (2002) https://doi.org/10.1117/12.474952

KEYWORDS: Photography, Holograms, Holography, Silver, Reflection, Mercury, Color imaging, 3D image processing, Photopolymers, Reflectors

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Proceedings Article | 3 June 2002 Paper

SHSG processing for three-wavelength HOEs recording in silver halide materials

Jong Man Kim, Yoon Choi, Hans Bjelkhagen, Nicholas Phillips

Proceedings Volume 4659, (2002) https://doi.org/10.1117/12.469293

KEYWORDS: Holographic optical elements, Silver, Holograms, Reflection, Potassium, Holography, Sodium, Photography, Chromium, Ions

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Proceedings Article | 3 June 2002 Paper

Color holography: a new technique for reproduction of paintings

Hans Bjelkhagen, Dalibor Vukicevic

Proceedings Volume 4659, (2002) https://doi.org/10.1117/12.469251

KEYWORDS: Holography, Holograms, Photography, Color reproduction, Glasses, Continuous wave operation, Stereoscopy, Pulsed laser operation, Spatial coherence, Light sources

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Proceedings Article | 4 June 2001 Paper

Computer simulation of the Lippmann photographic process and recording experiments using holographic materials

Hans Bjelkhagen, Savita De Souza

Proceedings Volume 4296, (2001) https://doi.org/10.1117/12.429472

KEYWORDS: Photography, Photopolymers, Information security, Holographic materials, Holography, Computer simulations, Reflection, Silver, Mirrors, Promethium

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Proceedings Article | 4 June 2001 Paper

Transmission and reflection SHSG holograms

Jong Man Kim, Byung Choi, Yoon Choi, Sun Kim, Jong-Min Kim, Hans Bjelkhagen, Nicholas Phillips

Proceedings Volume 4296, (2001) https://doi.org/10.1117/12.429461

KEYWORDS: Holographic optical elements, Silver, Holograms, Spatial frequencies, Manufacturing, Holography, Chromium, Potassium, Light scattering, Photography

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Proceedings Article | 3 October 2000 Paper

Holography and philately: postage stamps with embossed holograms

Hans Bjelkhagen

Proceedings Volume 4149, (2000) https://doi.org/10.1117/12.402461

KEYWORDS: Holograms, Holography, Optical design, Photonic integrated circuits, Printing, Photography, Satellites, Security printing, Francium, Fourier transforms

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Proceedings Article | 3 October 2000 Paper

Art of color holography: pioneers in change

Martin Richardson, Hans Bjelkhagen

Proceedings Volume 4149, (2000) https://doi.org/10.1117/12.402488

KEYWORDS: Holograms, Holography, Digital holography, Reflection, Head, Printing, Silver, Standards development, Optical design, 3D image processing

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Proceedings Article | 7 April 2000 Paper

Lippmann OVD for enhanced document security

Hans Bjelkhagen

Proceedings Volume 3973, (2000) https://doi.org/10.1117/12.382198

KEYWORDS: Photography, Information security, Holograms, Photopolymers, Manufacturing, Holography, Mercury, Cameras, Image processing, Inspection equipment

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Proceedings Article | 17 March 2000 Paper

HOEs recorded in silver halide sensitized gelatin emulsions

Jong Man Kim, Hans Bjelkhagen, Nicholas Phillips

Proceedings Volume 3956, (2000) https://doi.org/10.1117/12.380016

KEYWORDS: Silver, Holographic optical elements, Holograms, Diffraction, Holography, Chromium, Molecules, Ions, Light scattering, Materials processing

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Proceedings Article | 23 March 1999 Paper

New OVD based on interferential photography recorded in holographic materials

Hans Bjelkhagen

Proceedings Volume 3638, (1999) https://doi.org/10.1117/12.342808

KEYWORDS: Photography, Information security, Holograms, Photopolymers, Manufacturing, Silver, Holography, Mercury, Cameras, Holographic materials

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SPIE Journal Paper | 1 January 1999

New optical security device based on one-hundred-year-old photographic technique

Hans Bjelkhagen

OE, Vol. 38, Issue 01, (January 1999) https://doi.org/10.1117/12.10.1117/1.602061

KEYWORDS: Photography, Information security, Holograms, Photopolymers, Manufacturing, Cameras, Prisms, Holography, Silver, Optical engineering

Proceedings Article | 1 February 1998 Paper

Progress in color reflection holography

Hans Bjelkhagen, Qiang Huang, Tung Jeong

Proceedings Volume 3358, (1998) https://doi.org/10.1117/12.301459

KEYWORDS: Holography, Holograms, Holographic optical elements, Manufacturing, LCDs, Physics, Telecommunications, Image quality, Silver, Optical filters

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Proceedings Article | 1 February 1998 Paper

Old and modern Lippmann photography

Hans Bjelkhagen, Tung Jeong, Raymond Ro

Proceedings Volume 3358, (1998) https://doi.org/10.1117/12.301456

KEYWORDS: Photography, Holography, Reconnaissance, Holographic materials, Packaging, Carbon monoxide, Mercury, Holograms, Licensing, Security printing

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Proceedings Article | 10 April 1997 Paper

Lippman photographs recorded in DuPont color photopolymer material

Hans Bjelkhagen

Proceedings Volume 3011, (1997) https://doi.org/10.1117/12.271364

KEYWORDS: Photography, Holography, Photopolymers, Cameras, Optical filters, Holograms, Glasses, Mirrors, Mercury, Reflection

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Proceedings Article | 10 April 1997 Paper

Color silver halide hologram production and mastering

Hans Bjelkhagen, Qiang Huang

Proceedings Volume 3011, (1997) https://doi.org/10.1117/12.271379

KEYWORDS: Holograms, Holography, Silver, Diffraction, RGB color model, Argon ion lasers, Scattering, Photography, Optical resolution, Nd:YAG lasers

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Proceedings Article | 31 December 1996 Paper

Large-format color holograms recorded on ultrahigh-resolution silver halide emission

Hans Bjelkhagen, Qiang Huang

Proceedings Volume 2866, (1996) https://doi.org/10.1117/12.263081

KEYWORDS: Holograms, Holography, Silver, Optical filters, Continuous wave operation, Nd:YAG lasers, Argon ion lasers, Optical resolution, Photography, Scattering

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Proceedings Article | 25 March 1996 Paper

Applications of color holography

Tung Jeong, Hans Bjelkhagen, Louis Spoto

Proceedings Volume 2652, (1996) https://doi.org/10.1117/12.236061

KEYWORDS: Holograms, Holography, Mirrors, Holographic optical elements, Holographic interferometry, Silver, 3D image reconstruction, Interferometry, Diffraction, Aluminum

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Proceedings Article | 18 August 1995 Paper

Color holographic interferometry

Tung Jeong, Louis Spoto, Hans Bjelkhagen

Proceedings Volume 2622, (1995) https://doi.org/10.1117/12.216791

KEYWORDS: Holograms, Holographic interferometry, Mirrors, Holography, Interferometry, Diffraction gratings, Gas lasers, Vibration isolation, Beam splitters, Camera shutters

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Proceedings Article | 18 August 1995 Paper

Color holography

Hans Bjelkhagen, Tung Jeong

Proceedings Volume 2622, (1995) https://doi.org/10.1117/12.216840

KEYWORDS: Holograms, Holography, Mirrors, Diffraction, Silver, Scattering, Humidity, Nd:YAG lasers, Helium neon lasers, Photopolymers

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Proceedings Article | 12 April 1995 Paper

Experimental study of wavelength selections on color holography

Hans Bjelkhagen, Tung Jeong

Proceedings Volume 2406, (1995) https://doi.org/10.1117/12.206203

KEYWORDS: Holograms, Holography, Argon ion lasers, Color reproduction, Signal to noise ratio, CIE 1931 color space, Black bodies, Rayleigh scattering, Scattering, Reflectivity

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Proceedings Article | 23 March 1995 Paper

Recording and processing of silver-halide color holograms

Hans Bjelkhagen, Tung Jeong

Proceedings Volume 2405, (1995) https://doi.org/10.1117/12.205353

KEYWORDS: Holograms, Holography, Mirrors, Diffraction, Scattering, Silver, Continuous wave operation, Nd:YAG lasers, 3D image reconstruction, Humidity

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Proceedings Article | 17 February 1995 Paper

Lippmann color holography in a single-layer silver-halide emulsion

Hans Bjelkhagen, Dalibor Vukicevic

Proceedings Volume 2333, (1995) https://doi.org/10.1117/12.201881

KEYWORDS: Holograms, Holography, Photography, Diffraction, Image resolution, Astatine, Scattering, Silver, Argon ion lasers, Multiplexing

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Proceedings Article | 12 January 1994 Paper

Investigation of silver-halide emulsions for holography

Hans Bjelkhagen, Dalibor Vukicevic

Proceedings Volume 2043, (1994) https://doi.org/10.1117/12.165565

KEYWORDS: Holograms, Holography, Image resolution, 3D image reconstruction, Silver, Diffraction, Scattering, Optical resolution, Image processing, Laser scattering

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Proceedings Article | 2 March 1993 Paper

Surface-relief hologram recording in silver halide gelatin emulsion

Hans Bjelkhagen, Dalibor Vukicevic

Proceedings Volume 1732, (1993) https://doi.org/10.1117/12.140392

KEYWORDS: Silver, Holograms, Spatial frequencies, Holography, Diffraction, Etching, Potassium, Coating, Scanning electron microscopy, Polymers

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Proceedings Article | 2 September 1992 Paper

Virtual image replay system for viewing bubble chamber holograms

Hans Bjelkhagen, Ray Burnstein, V. Makeev, R. Naon

Proceedings Volume 1779, (1992) https://doi.org/10.1117/12.140963

KEYWORDS: Holograms, Holography, Monochromatic aberrations, Liquids, 3D image reconstruction, Photography, Dye lasers, Helium neon lasers, Cameras, Image resolution

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Proceedings Article | 1 August 1992 Paper

What is possible with holographic endoscopy? (Invited Paper)

Hans Bjelkhagen

Proceedings Volume 1647, (1992) https://doi.org/10.1117/12.60204

KEYWORDS: Holography, Holograms, Endoscopy, Tissues, Spectral resolution, Endoscopes, 3D image reconstruction, Interferometry, Holographic interferometry, Diagnostics

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Proceedings Article | 1 January 1992 Paper

Silver halide emulsions for Lippmann photography and holography

Hans Bjelkhagen

Proceedings Volume 1600, (1992) https://doi.org/10.1117/12.57775

KEYWORDS: Silver, Holography, Photography, Potassium, Holograms, Coating, Crystals, Ions, Glasses, Sodium

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Proceedings Article | 1 January 1992 Paper

Holographic portrait of Ronald Reagan

Hans Bjelkhagen, Rebecca Deem, John Landry, Michel Marhic, Fred Unterseher

Proceedings Volume 1600, (1992) https://doi.org/10.1117/12.57827

KEYWORDS: Holography, Holograms, Photography, Information security, Mirrors, Pulsed laser operation, Imaging systems, Laser optics, Laser systems engineering, Lanthanum

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Proceedings Article | 1 July 1991 Paper

Chemical symmetry: developers that look like bleach agents for holography

Hans Bjelkhagen, Nicholas Phillips, Ce Wang

Proceedings Volume 1461, (1991) https://doi.org/10.1117/12.44743

KEYWORDS: Holography, Silver, Holograms, Ions, Chemistry, Potassium, Modulation, Diffusion, Toxicity, Oxidation

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Proceedings Article | 1 March 1991 Paper

Holographic high-resolution endoscopic image recording

Hans Bjelkhagen

Proceedings Volume 1396, (1991) https://doi.org/10.1117/12.25800

KEYWORDS: Holograms, Holography, Tissues, Endoscopy, Endoscopes, Image resolution, Optical resolution, Tissue optics, Microscopes, Image acquisition

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Proceedings Article | 1 March 1991 Paper

Study of the fracture process using laser holographic interferometry and image analysis

Alberto Castro-Montero, Surendra Shah, Hans Bjelkhagen

Proceedings Volume 1396, (1991) https://doi.org/10.1117/12.25803

KEYWORDS: Holograms, Holographic interferometry, Image analysis, Image processing, Holography, Fringe analysis, Interferometry, Binary data, 3D image reconstruction, Laser processing

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Proceedings Article | 1 August 1990 Paper

High-resolution imaging using endoscopic holography

Hans Bjelkhagen

Proceedings Volume 1321, (1990) https://doi.org/10.1117/12.22360

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Proceedings Article | 5 June 1990 Paper

Holographic portraits

Hans Bjelkhagen

Proceedings Volume 10308, 103080H (1990) https://doi.org/10.1117/12.2283699

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Showing 5 of 45 publications

Proceedings Volume Editor (19)

SPIE Conference Volume | 15 March 2022

Practical Holography XXXVI: Displays, Materials, and Applications

SPIE Conference Volume | 16 April 2021

Practical Holography XXXV: Displays, Materials, and Applications

SPIE Conference Volume | 3 March 2020

Practical Holography XXXIV: Displays, Materials, and Applications

SPIE Conference Volume | 7 June 2019

Practical Holography XXXIII: Displays, Materials, and Applications

SPIE Conference Volume | 29 June 2018

Practical Holography XXXII: Displays, Materials, and Applications

Showing 5 of 19 publications

Conference Committee Involvement (34)

Holography: Advances and Modern Trends IX

7 April 2025 | Prague, Czech Republic

Practical Holography XXXIX: Displays, Materials, and Applications

28 January 2025 | San Francisco, California, United States

Photosensitive Materials and their Applications III

8 April 2024 | Strasbourg, France

Practical Holography XXXVIII: Displays, Materials, and Applications

30 January 2024 | San Francisco, California, United States

Holography: Advances and Modern Trends VIII

24 April 2023 | Prague, Czech Republic

Practical Holography XXXVII: Displays, Materials, and Applications

31 January 2023 | San Francisco, California, United States

Photosensitive Materials and their Applications II

5 April 2022 | Strasbourg, France

Practical Holography XXXVI: Displays, Materials, and Applications

25 January 2022 | San Francisco, California, United States

Holography: Advances and Modern Trends VII

19 April 2021 | Online Only, Czech Republic

Practical Holography XXXV: Displays, Materials, and Applications

6 March 2021 | Online Only, California, United States

Photosensitive Materials and their Applications

6 April 2020 | Online Only, France

Practical Holography XXXIV: Displays, Materials, and Applications

5 February 2020 | San Francisco, California, United States

Holography: Advances and Modern Trends

1 April 2019 | Prague, Czech Republic

Practical Holography XXXIII: Displays, Materials, and Applications

4 February 2019 | San Francisco, California, United States

Practical Holography XXXII: Displays, Materials, and Applications

29 January 2018 | San Francisco, California, United States

Holography: Advances and Modern Trends

24 April 2017 | Prague, Czech Republic

Practical Holography XXXI: Materials and Applications

30 January 2017 | San Francisco, California, United States

Practical Holography XXX: Materials and Applications

15 February 2016 | San Francisco, California, United States

Practical Holography XXIX: Materials and Applications

8 February 2015 | San Francisco, California, United States

Practical Holography XXVIII: Materials and Applications

3 February 2014 | San Francisco, California, United States

Practical Holography XXVII: Materials and Applications

3 February 2013 | San Francisco, California, United States

Practical Holography XXVI: Materials and Applications

22 January 2012 | San Francisco, California, United States

Practical Holography XXV: Materials and Applications

23 January 2011 | San Francisco, California, United States

Practical Holography XXIV: Materials and Applications

25 January 2010 | San Francisco, California, United States

Practical Holography XXIII: Materials and Applications

25 January 2009 | San Jose, California, United States

Practical Holography XXII: Materials and Applications

20 January 2008 | San Jose, California, United States

Practical Holography XXI: Materials and Applications

21 January 2007 | San Jose, California, United States

Practical Holography XX: Materials and Applications

22 January 2006 | San Jose, California, United States

Practical Holography XIX: Materials and Applications

26 January 2005 | San Jose, California, United States

Practical Holography XVIII: Materials and Applications

19 January 2004 | San Jose, California, United States

Holographic Materials IX

21 January 2003 | Santa Clara, CA, United States

Holographic Materials VIII

21 January 2002 | San Jose, California, United States

Holographic Materials VII

23 January 2001 | San Jose, CA, United States

Holography 2000

10 July 2000 | St. Poelton, Austria

Showing 5 of 34 Conference Committees

Course Instructor

SC522: Holographic Recording Materials

An introduction to the holographic recording process is given, including also the demands on recording materials for holography. The course covers different recording materials for holograms, HOEs, and DOEs, which currently are on the market. In particular, the new improved silver halide (AgHal) emulsions from new sources as well as dichromated gelatin, photopolymer, photoresist, thermoplastic materials, and bacteriorhodopsin are all described.

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