Dr. Howard Fein Profile

Dr. Howard Fein

Chief Optical Scientist at Peak Nano Optics LLC

SPIE Involvement:

Author | Science Fair Judge

Area of Expertise:

Optical System Design , Nanolayer polymer GRIN optical design , GRIN optics design , Holographic NonDestructive Test , Machine Vision System deisgn and applications

Websites:

Company Website

Profile Summary

o Over 35 years of experience and expertise with practical applications in diverse fields of advanced optics and design, optical and holographic interferometry and nondestructive structural and vibration analysis and applications, digital imaging and machine vision, medical and microscopic imaging, laser development and applications, optical testing, metrology, and radiation measurement. Innovative, practical solutions to technical problems come from an extremely strong and intuitive background in optics, laser, electro-optics, fiber optics technology, and optical design and analysis
o Technology Lead Scientist for R&D, large contract development, marketing, and sales of Prototype and integrated production optical components and systems
o Chief designer of unique optical components and integrated optical systems employing proprietary Polymer Nano-Layer Gradient Index optical materials in DOD-related programs supported by DARPA, ONR, NRL, AFRL.
o Also Primary designer of unique, compact, and highly efficient Prototype Military VIS, IR LIDAR and TeraHertz optical systems for operational test and evaluation.
o Current design work employs modern optical design software tools such as ZEMAX17 and Photonics Engineering FRED software.
o Internationally respected authority in the field of holographic interferometry, vibration, structural, and nondestructive testing.
o Expert with state of the art Optical Metrology
o Designer of unique (Patent-pending) ultra-miniature medical illumination systems and medical and industrial digital microscopic imaging systems
o Numerous public technology presentations in industry and academia
o Authored approximately 50 technical articles, invited papers, book chapters, and presentations
o Over 25 current patents and co-patents in Optical design, Medical and LIDAR Optics, digital imaging, machine vision, and optical metrology.

Publications (24)

Proceedings Article | 8 May 2018 Presentation + Paper

Presentation + Paper

SWaP advantage of replacing high performance glass achromatic doublet with a polymeric nanolayer GRIN achromatic singlet

Howard Fein, Michael Ponting

Proceedings Volume 10627, 106270B (2018) https://doi.org/10.1117/12.2304828

KEYWORDS: GRIN lenses, Polymers, Lens design, Optics manufacturing, Glasses, Gradient-index optics, Spherical lenses, Polymer thin films, Modulation transfer functions, Refractive index

Read Abstract +

Proceedings Article | 17 May 2016 Paper

Paper

An analytical study of thermal invariance of polymeric nanolayer gradient index optical components

Howard Fein, Michael Ponting

Proceedings Volume 9822, 98220X (2016) https://doi.org/10.1117/12.2222886

KEYWORDS: Gradient-index optics, Polymers, Optical components, Thermography, GRIN lenses, Lenses, Nanomaterials, Polymer thin films, Photorefractive polymers, Optical design, Temperature metrology, Monochromatic aberrations, Wavefronts, Aspheric lenses, Spherical lenses

Read Abstract +

Proceedings Article | 12 September 2003 Paper

Paper

An application of holographic interferometry for dynamic vibration analysis of a jet engine turbine compressor rotor

Howard Fein

Proceedings Volume 5092, (2003) https://doi.org/10.1117/12.487729

KEYWORDS: Holography, Holograms, Holographic interferometry, Fringe analysis, Data modeling, Vibrometry, Nondestructive evaluation, Acoustics, Computer simulations, Mathematical modeling

Read Abstract +

Holographic Interferometry has been successfully employed to characterize the materials and behavior of diverse types of structures under dynamic stress. Specialized variations of this technology have also been applied to define dynamic and vibration related structural behavior. Such applications of holographic technique offer some of the most effective methods of modal and dynamic analysis available. Real-time dynamic testing of the modal and mechanical behavior of jet engine turbine, rotor, vane, and compressor structures has always required advanced instrumentation for data collection in either simulated flight operation test or computer-based modeling and simulations. Advanced optical holography techniques are alternate methods which result in actual full-field behavioral data in a noninvasive, noncontact environment. These methods offer significant insight in both the development and subsequent operational test and modeling of advanced jet engine turbine and compressor rotor structures and their integration with total vehicle system dynamics. Structures and materials can be analyzed with very low amplitude excitation and the resultant data can be used to adjust the accuracy of mathematically derived structural and behavioral models. Holographic Interferometry offers a powerful tool to aid in the developmental engineering of turbine rotor and compressor structures for high stress applications. Aircraft engine applications in particular most consider operational environments where extremes in vibration and impulsive as well as continuous mechanical stress can affect both operation and structural stability. These considerations present ideal requisites for analysis using advanced holographic methods in the initial design and test of turbine rotor components. Holographic techniques are nondestructive, real-time, and definitive in allowing the identification of vibrational modes, displacements, and motion geometries. Such information can be crucial to the determination of mechanical configurations and designs as well as critical operational parameters of turbine structural components or unit turbine components fabricated from advanced and exotic new materials or using new fabrication methods. Anomalous behavioral characteristics can be directly related to hidden structural or mounting anomalies and defects.

Proceedings Article | 4 June 2003 Paper

Paper

Application of holographic interferometry for dynamic vibration analysis of a jet engine turbine compressor rotor

Howard Fein

Proceedings Volume 5005, (2003) https://doi.org/10.1117/12.476878

KEYWORDS: Holography, Holograms, Holographic interferometry, Fringe analysis, Data modeling, Vibrometry, Nondestructive evaluation, Acoustics, Computer simulations, Mathematical modeling

Read Abstract +

Holographic Interferometry has been successfully employed to characterize the materials and behavior of diverse types of structures under dynamic stress 1,2,3,4. Specialized variations of this technology have also been applied to define dynamic and vibration related structural behavior 5. Such applications of holographic technique offer some of the most effective methods of modal and dynamic analysis available. Real-time dynamic testing of the modal and mechanical behavior of jet engine turbine, rotor, vane, and compressor structures has always required advanced instrumentation for data collection in either simulated flight operation test or computer-based modeling and simulations. Advanced optical holography techniques are alternate methods which result in actual full-field behavioral data in a noninvasive, noncontact environment 6. These methods offer significant insight in both the development and subsequent operational test and modeling of advanced jet engine turbine and compressor rotor structures and their integration with total vehicle system dynamics. Structures and materials can be analyzed with very low amplitude excitation and the resultant data can be used to adjust the accuracy of mathematically derived structural and behavioral models. Holographic Interferometry offers a powerful tool to aid in the developmental engineering of turbine rotor and compressor structures for high stress applications. Aircraft engine applications in particular must consider operational environments where extremes in vibration and impulsive as well as continuous mechanical stress can affect both operation and structural stability. These considerations present ideal requisites for analysis using advanced holographic methods in the initial design and test of turbine rotor components. Holographic techniques are nondestructive, real-time, and definitive in allowing the identification of vibrational modes, displacements, and motion geometries. Such information can be crucial to the determination of mechanical configurations and designs as well as critical operational parameters of turbine structural components or unit turbine components fabricated from advanced and exotic new materials or using new fabrication methods. Anomalous behavioral characteristics can be directly related to hidden structural or mounting anomalies and defects.

Proceedings Article | 4 June 2001 Paper

Paper

Application of holographic interferometry for dynamic vibration analysis of subminiature mechanical components

Harry Fein

Proceedings Volume 4296, (2001) https://doi.org/10.1117/12.429443

KEYWORDS: Holography, Holograms, Holographic interferometry, Finite element methods, Data modeling, Fringe analysis, Vibrometry, Modal analysis, Nondestructive evaluation, Video

Read Abstract +

Proceedings Article | 17 March 2000 Paper

Paper

Applications of holographic interferometry for nondestructive dynamic analysis of a complex ceramic component

Howard Fein

Proceedings Volume 3956, (2000) https://doi.org/10.1117/12.379988

KEYWORDS: Holography, Holograms, Fringe analysis, Holographic interferometry, Nondestructive evaluation, Ceramics, Optical design, Digital holography, Data modeling, Inspection

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Proceedings Article | 19 July 1999 Paper

Paper

Holographic interferometry applied to real-time dynamic modal analysis of an advanced exotic metal alloy airfoil structure

Howard Fein

Proceedings Volume 3697, (1999) https://doi.org/10.1117/12.352934

KEYWORDS: Holography, Holograms, Fringe analysis, Holographic interferometry, Metals, Aerodynamics, Modal analysis, Control systems, Nondestructive evaluation, Data modeling

Read Abstract +

Proceedings Article | 25 March 1999 Paper

Paper

Application of holographic interferometry for analysis of the dynamic and modal characteristics of an advanced exotic metal airfoil structure

Howard Fein

Proceedings Volume 3637, (1999) https://doi.org/10.1117/12.343776

KEYWORDS: Holography, Holograms, Metals, Fringe analysis, Holographic interferometry, Aerodynamics, Data modeling, Titanium, Acoustics, Nondestructive evaluation

Read Abstract +

Holographic Interferometry has been successfully employed to characterize the materials and behavior of diverse types of structures under stress. Specialized variations of this technology have also been applied to define dynamic and vibration related structural behavior. Such applications of holographic technique offer some of the most effective methods of modal and dynamic analysis available. Real-time dynamic testing of the modal and mechanical behavior of aerodynamic control and airfoil structures for advanced aircraft has always required advanced instrumentation for data collection in either actual flight test or wind-tunnel simulations. Advanced optical holography techniques are alternate methods which result in actual full-field behavioral data on the ground in a noninvasive environment. These methods offer significant insight in both the development and subsequent operational test and modeling of advanced exotic metal control structures and their integration with total vehicle system dynamics. Structures and materials can be analyzed with very low amplitude excitation and the resultant data can be used to adjust the accuracy mathematically derived structural and behavioral models. Holographic Interferometry offers a powerful tool to aid in the developmental engineering of exotic metal structures for high stress applications. Advanced Titanium alloy is a significant example of these sorts of materials which has found continually increased use in advanced aerodynamic, undersea, and other highly mobil platforms. Aircraft applications in particular must consider environments where extremes in vibration and impulsive mechanical stress can affect both operation and structural stability. These considerations present ideal requisites for analysis using advanced holographic methods in the initial design and test of structures made with such advanced materials. Holographic techniques are nondestructive, real- time, and definitive in allowing the identification of vibrational modes, displacements, and motion geometries. Such information can be crucial to the determination of mechanical configurations and designs as well as operational parameters of structural components fabricated from advanced and exotic materials. Anomalous behavioral characteristics can be directly related to hidden structural or mounting anomalies and defects. Deriving such information can be crucial to the determination of mechanical configurations and designs, as well as critical operational parameters of structural components fabricated from advanced and exotic materials.

Proceedings Article | 13 July 1998 Paper

Paper

Application of holography to real-time dynamic structural analysis of an advanced graphite-epoxy composite flight control component

Howard Fein

Proceedings Volume 3368, (1998) https://doi.org/10.1117/12.316385

KEYWORDS: Holography, Composites, Holograms, Fringe analysis, Holographic interferometry, Structural analysis, Control systems, Nondestructive evaluation, Aerodynamics, Data modeling

Read Abstract +

Holographic Interferometry as been successfully employed to characterize the materials and behavior of diverse types of structures under stress. Specialized variations of this technology have also been applied to define dynamic and vibration related structural behavior. Such applications of holographic technique offer some of the most effective methods of modal and dynamic analysis available. Real-time dynamic testing of the modal and mechanical behavior of aerodynamic control structures for advanced missiles systems has always required advanced instrumentation for data collection in either actual flight test or wind-tunnel simulations. Advanced optical holography techniques are alternate methods when define actual behavioral data on the ground in a nondestructive Hardware-in-the-loop environment. These methods offer significant insight in both the development and subsequent operational test and modeling of advanced composite control structures and their integration with total vehicle system dynamics. Structures and materials can be analyzed with very low amplitude excitation and the resultant data can be used to adjust the accuracy of mathematically derived structural models. Holographic Interferometry offers a powerful tool to aid in the primary engineering and development of advanced graphite-epoxy fiber composite materials for use in advanced aerodynamic platforms. Aircraft, missile, and smart weapon control structure applications must consider environments where extremes in vibration and mechanical stresses can affect both operation and structural stability. These are ideal requisites for unlaces using advanced holographic methods in the initial design and subsequent test of such advanced components. Holographic techniques are nondestructive, real-time, and definitive in allowing the identification of vibrational modes, displacements, and motion geometries. Holographic analysis is also directly indicative of various types of induced mechanical, thermal, and acoustic structural stress related to hidden structural anomalies and defects. Deriving such information can be crucial to the determination of mechanical configurations and designs, as well as critical operational parameters of structures composed of advanced engineering materials.

Proceedings Article | 31 March 1998 Paper

Paper

Holographic analysis of the structural and operational dynamics of an advanced graphite-epoxy composite flight control structure

Howard Fein

Proceedings Volume 3397, (1998) https://doi.org/10.1117/12.305049

KEYWORDS: Holography, Composites, Holograms, Holographic interferometry, Fringe analysis, Nondestructive evaluation, Aerodynamics, Data modeling, Mathematical modeling, Acoustics

Read Abstract +

Proceedings Article | 18 March 1998 Paper

Paper

Holographic interferometry applied to characterize the dynamic and modal behavior of in-the-ear hearing aid devices

Howard Fein

Proceedings Volume 3293, (1998) https://doi.org/10.1117/12.303642

KEYWORDS: Holography, Holograms, Holographic interferometry, Acoustics, Fringe analysis, Nondestructive evaluation, Optical design, Data modeling, Modal analysis, Holography applications

Read Abstract +

Proceedings Article | 15 July 1997 Paper

Paper

Real-time holographic analysis of the modal and dynamic characteristics of an advanced graphite-epoxy missile flight control structure

Howard Fein

Proceedings Volume 3084, (1997) https://doi.org/10.1117/12.280965

KEYWORDS: Holography, Composites, Holograms, Holographic interferometry, Missiles, Data modeling, Fringe analysis, Aerodynamics, Nondestructive evaluation, Modal analysis

Read Abstract +

Holographic Interferometry has been successfully employed to characterize the materials and behavior of diverse types of structures under stress. Specialized variations of this technology have also been applied to define dynamic and vibration related structural behavior. Such applications of holographic technique offer some of the most effective methods of modal and dynamic analysis available. Real-time dynamic testing of the model behavior of aerodynamic control structures for advanced missiles systems has always required advanced instrumentation for data collection in either actual flight test or wind-tunnel simulations. Advanced optical holographic techniques are alternate methods which define actual behavioral data on the ground in a noninvasive hardware-in-the-loop environment. These methods offer significant insight in both the development and subsequent operational test and modeling of advanced composite control structures and their integration with total vehicle system dynamics. Structures and materials can be analyzed with very low amplitude excitation and the resultant data can be used to adjust the accuracy of mathematically derived structural models. Holographic Interferometry has offered a powerful tool to aid in the primary engineering and development of advanced graphite-epoxy fiber composite structures which are finding increased use in advanced aerodynamic platforms. Smart weapon and missile control structure applications must consider environments where extremes in vibration and mechanical stresses can affect both operation and structural stability. These are ideal requisites for analysis using advanced holographic methods in the initial design and subsequent test of such advanced components. Holographic techniques are non-destructive, real-time, and definitive in allowing the identification of vibrational modes, displacements, and motion geometries. Deriving such information without having to resort to in-flight data collection methods can be crucial to the determination of mechanical configurations and designs, as well as critical operational parameters.

Proceedings Article | 15 May 1997 Paper

Paper

Holographic interferometry applied to characterize the dynamic structure of an advanced graphite-epoxy polymer composite structure

Howard Fein

Proceedings Volume 3010, (1997) https://doi.org/10.1117/12.274425

KEYWORDS: Holography, Composites, Holograms, Holographic interferometry, Fringe analysis, Nondestructive evaluation, Polymers, Data modeling, Structural analysis, Structural dynamics

Read Abstract +

Holographic interferometry has been successfully employed to characterize the materials and behavior of diverse types of structures under stress. Such applications of holographic technique offer some of the most effective methods of modal and dynamic analysis available. The technology is non- destructive, real-time, and definitive in allowing the identification of vibrational modes, displacements, and motion geometry. Structures and processed materials can be analyzed with very low amplitude excitation and the resultant data can be used to adjust the accuracy of mathematically derived structural models. Holographic interferometry has offered a powerful tool to aid in the primary engineering and development of advanced complex composite materials. One such material is a graphite-epoxy fiber reinforced polymer matrix composite. This type of material is finding increased use in advanced aerodynamic, automotive, and other highly mobile platforms. Avionic and undersea applications especially, must consider environments where extremes in vibration and mechanical stresses can affect both operation and structural stability. These are ideal requisites for analysis using advanced holographic methods in the initial design and subsequent test of such advanced structures and materials. Specialized variations of holographic technology have also been applied to define dynamic and vibration related structural behavior. This has been particularly useful in characterizing dynamic parameters of advanced components composed of composite materials. Holographic methods are non- destructive, real-time, and definitive in allowing the identification of minute displacements, and motion geometries. Such effects are directly indicative of various types of induced mechanical, thermal, and acoustic structural stress related to hidden structural anomalies and defects. Such information is often crucial to the determination of mechanical configurations and designs as well as operational parameters of structures composed of advanced engineering materials.

Proceedings Article | 24 May 1996 Paper

Paper

Holographic analysis of the structural characteristics and operational dynamics of advanced sonar transducer arrays

Howard Fein

Proceedings Volume 2756, (1996) https://doi.org/10.1117/12.241146

KEYWORDS: Holography, Transducers, Acoustics, Holograms, Near field, Nondestructive evaluation, Holographic interferometry, Fringe analysis, Visualization, Structural analysis

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Proceedings Article | 25 March 1996 Paper

Paper

Application of holographic interferometry to characterize the dynamic and modal behavior of an advanced graphite-epoxy polymer matrix composite structure

Howard Fein

Proceedings Volume 2652, (1996) https://doi.org/10.1117/12.236072

KEYWORDS: Holography, Composites, Holograms, Holographic interferometry, Nondestructive evaluation, Fringe analysis, Polymers, Data modeling, Modal analysis, Superposition

Read Abstract +

Proceedings Article | 5 July 1995 Paper

Paper

Holographic interferometry applied to characterize the near-field acoustic displacement patterns and dynamics of operating sonar arrays

Howard Fein

Proceedings Volume 2485, (1995) https://doi.org/10.1117/12.213099

KEYWORDS: Acoustics, Holography, Transducers, Holographic interferometry, Near field, Holograms, Target recognition, Fringe analysis, Nondestructive evaluation, Data processing

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Proceedings Article | 14 June 1995 Paper

Paper

Holographic analysis of the displacement dynamics of active complex compliant array structures

Howard Fein

Proceedings Volume 2544, (1995) https://doi.org/10.1117/12.211867

KEYWORDS: Holography, Transducers, Holographic interferometry, Holograms, Acoustics, Nondestructive evaluation, Interfaces, Fringe analysis, Near field, Visualization

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Proceedings Article | 12 April 1995 Paper

Paper

Application of holographic interferometry to evaluate dynamic and material characteristics in a bonded compliant structure

Howard Fein

Proceedings Volume 2406, (1995) https://doi.org/10.1117/12.206213

KEYWORDS: Holography, Holographic interferometry, Holograms, Nondestructive evaluation, Fringe analysis, Interfaces, Materials processing, Ultrasonics, Testing and analysis, Structural dynamics

Read Abstract +

Proceedings Article | 4 October 1994 Paper

Paper

Interferometric measurement and monitoring of small-scale periodic vibration and displacement

Howard Fein

Proceedings Volume 2264, (1994) https://doi.org/10.1117/12.188869

KEYWORDS: Speckle, Interferometers, Interferometry, Transducers, Fringe analysis, Photodetectors, Vibration control, Motion measurement, Superposition, Oscilloscopes

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Proceedings Article | 30 September 1994 Paper

Paper

Holographic interferometry applied to the analysis of active complex compliant structures

Howard Fein

Proceedings Volume 2263, (1994) https://doi.org/10.1117/12.188012

KEYWORDS: Transducers, Holography, Holographic interferometry, Holograms, Nondestructive evaluation, Acoustics, Visualization, Fringe analysis, Control systems, Energy transfer

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Proceedings Article | 29 July 1994 Paper

Paper

Holographic analysis of the dynamics and structure of sonar transducer arrays

Howard Fein

Proceedings Volume 2234, (1994) https://doi.org/10.1117/12.181017

KEYWORDS: Transducers, Target recognition, Holography, Visualization, Structural dynamics, Interfaces, Nondestructive evaluation, Acoustics, Energy transfer, Visual analytics

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Proceedings Article | 1 May 1994 Paper

Paper

Holographic interferometry applied to the characterization and analysis of the dynamic and modal behavior of complex circuit board structures

Howard Fein

Proceedings Volume 2176, (1994) https://doi.org/10.1117/12.172641

KEYWORDS: Holography, Holograms, Holographic interferometry, Nondestructive evaluation, Fringe analysis, Data modeling, Modal analysis, Acoustics, Analytical research, Circuit board testing

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Proceedings Article | 15 October 1993 Paper

Paper

Holographic analysis of near-field acoustic displacement patterns of operating sonar transducer arrays

Howard Fein

Proceedings Volume 1960, (1993) https://doi.org/10.1117/12.160603

KEYWORDS: Holography, Acoustics, Transducers, Near field, Holographic interferometry, Target recognition, Holograms, Object recognition, Data processing, Visualization

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Proceedings Article | 27 September 1993 Paper

Paper

Application of holographic interferometry to the characterization of the dynamics of a complex bonded structure

Howard Fein

Proceedings Volume 1999, (1993) https://doi.org/10.1117/12.158612

KEYWORDS: Holography, Holographic interferometry, Holograms, Nondestructive evaluation, Fringe analysis, Adhesives, Optical fabrication, Interfaces, Aluminum, Solids

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Showing 5 of 24 publications

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