Dr. Peter Hartmann
Principal Scientist retired
Area of Expertise:
Optical Glass Properties Applications , ZERODUR Properties Applications , ZERODUR Bending Strength , Optical Glass and EU Directive RoHS , Optical Glass Standardization , Optical Glass Metrology
Profile Summary

Diploma in Physics at University of Mainz on optical pumping of short-lived Rb-isotopes
Doctorate in physics at Max-Planck-Institute Mainz on Development of Scintillation Glasses
Quality assurance and application of optical glasses, radiation shielding glasses and Zerodur
Projects involved: KECK, CHANDRA, ESO-VLT, i-line glass for Microlithography, HET, GRANTECAN, 4 m mirror blanks, LISA Pathfinder, ESO-ELT
For more than 25 years experience in optical glass, Zerodur and special optical glasses - specification, properties, measurement methods, application consulting, standardization, instruction
Recent specializations
Strength optical glass and zero expansion glass ceramic (ZERODUR),
Development of measurement methods for optical glass,
Dispersion properties of optical glasses,
Lobby work for optical glass and filter glass related to EU directive RoHS
(Awarded with Honorary Bear of German Industrial Federation SPECTARIS 2010 and 2018)
Schott user workshops for optical materials
ISO standardization for optical glass and optical elements

OPTENCE - Photonics competence cluster Hesse / Rhineland-Palatinate, Germany - Member of the Board until 4/2018, Honorary member
DIN German Inst. for Standardization Optics and Precision Mechanics Standards Committee - Vice President until 4/2017
DIN German Inst. for Standardization Working Group "Optical Materials" - Convener until 1/2018
ISO International Standarization Organization - Working Group "Raw Optical Glass" - Convener until 1/2018
Max-Planck-Institute for Astronomy Heidelberg Germany Member of the Board of Trustees



Publications (58)

SPIE Journal Paper | 9 February 2019
OE Vol. 58 Issue 02
KEYWORDS: Zerodur, Glasses, Etching, Surface finishing, Failure analysis, Corrosion, Humidity, Diamond, Mirrors, Polishing

Proceedings Article | 10 July 2018
Proc. SPIE. 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III
KEYWORDS: Polishing, Statistical analysis, Visualization, Etching, Glasses, Particles, Spherical lenses, Signal detection, Zerodur, Surface finishing

Proceedings Article | 15 June 2018
Proc. SPIE. 10692, Optical Fabrication, Testing, and Metrology VI
KEYWORDS: Optical components, Rockets, Cameras, Glasses, Ceramics, Flint glass, Zerodur, Temperature metrology, Lead, Data analysis

Proceedings Article | 5 June 2018
Proc. SPIE. 10690, Optical Design and Engineering VII
KEYWORDS: Modeling, Zemax, Microscopes, Refractive index, Glasses, Optical simulations, Wavefront distortions, Systems modeling

Proceedings Article | 5 June 2018
Proc. SPIE. 10690, Optical Design and Engineering VII
KEYWORDS: Optical components, Lenses, Glasses, Distortion, Objectives, Photographic lenses, Tolerancing, Systems modeling

Showing 5 of 58 publications
Conference Committee Involvement (10)
SPIE Photonics Europe
3 April 2016 | Brussels, Belgium
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
23 June 2014 | Montréal, Quebec, Canada
SPIE Photonics Europe
13 April 2014 | Brussels, Belgium
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II
1 July 2012 | Amsterdam, Netherlands
SPIE Photonics Europe
16 April 2012 | Brussels, Belgium
Showing 5 of 10 Conference Committees
Course Instructor
SC1179: Optical Glass – Properties and Application-oriented Specification
Optical glass provides a central function in optical systems: the precisely defined refraction of light with the highest throughput. Large parts of the optical industry depend on this key material. Microscopes, binoculars, cameras, and projectors constitute examples that are unthinkable without optical glass. Their properties, however, differ considerably from those of other technical materials such as metals or plastics. Datasheet values of refractive index extend to five decimal places (e.g. 1.51680) and homogeneity might be specified to even two more digits (e.g. 2x10-7). This extreme precision sets optical glass apart from most other materials. For optical glass users it is important to know facts about its production and properties in order to specify optical elements adequately. Engineering drawing requirements must ensure sound function of the optical system but should do so without over-specifying various attributes which might lead to higher costs, delivery time delay, or even non-availability. Application formats extend from the millimeter range up to about one meter. For small parts, glass properties are usually not expected to be critical. Most properties, however, do not scale up linearly with the sample size. For large lenses and prisms, different scaling laws of glass properties must be taken into consideration in order to obtain suitable quality. For designing and purchasing of optical elements it is very useful to know the technical conditions of producing, post-processing, quality inspection, and application of optical glass. This course provides knowledge about glass types and properties, including definitions, tolerances, and measurement methods. Relevant properties to be discussed include refractive index, dispersion, transmission, homogeneity, striae, stress birefringence. Also covered are production processes and their influences on glass properties, raw glass delivery formats. The course covers specification of lenses and prisms for optical systems according to the international standards ISO 10110 (optical elements) and ISO 12123 (raw optical glass). Finally, availability of optical glasses and restrictions thereof due to technical, economic, and regulatory reasons are covered.
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