The following web-sites give some additional information about my scientific fields:

• www.joerg-piper.com
• www.luminance-contrast.com
• www.relief-phase-contrast.com
• www.prof-piper.com (in German)
• www.joerg-piper.de (in German)
• www.relief-phasenkontrast.de (in German)
• www.luminanzkontrast.de (in German)

Homepages of some journals dealing with microscopy I have collaborated with:

• www.microscopy-analysis.com
• www.microscopy-today.com
• www.formatex.org/microscopy3 (Microscopy Book Series)
• www.elsevier.com/wps/find/journaldescription.cws_home/701786/description#description
• www.elsevier.de/artikel/805100 (in German)
• www.elsevier.de/mikrok (in German)

Homepages of the University of Oradea and the IUIPS:

• www.uoradea.ro
• http://iuips.uoradea.ro

[Introduction]
[Resolution and focal depth]
[Principles of luminance contrast]
[Modification of lenses]
[Mirror objectives]
[Illuminating apparatus]
[Material and methods]
[Results]
[Further technical developements]
[Discussion]
[Summary]
[Links]
[Contact]
[References]
[Image gallery]