Hello, dr. Alameldin

I did some similar measurements on titanium and zirconium small pieces by a full-field technique (structured light, or Grey Coded light), that is projecting straight lines whose spatial frequencies may be transduced into geometrical shape. i remember (that was a few years ago, while I was still in activity) that you may easily obtained a resolution of a few nanometers, and even better (order of 0.2 nm)  in differential mode.

Maybe it may give you a new idea.

Good luck,

Dan

Hello, Dr. Borza

Thanks a lot for answering my question, I do appreciate it. However, I still don't have a clue on how to do it! Can you explain the technique or refer me to some references where I can find the method to do so. 

Sorry for any inconvenience.

Best regards.

Dr. Alameldin,

I have added, for your convenience, the full text of a book chapter describing (in french) some principles and results related to the 3-d measurement by full-field structured light.

You may access and download it from https://www.researchgate.net/publication/313853798_CH4_document_travail?_sg=j4UgeToF5OiFGxvsCFcJmYqUw9_tf6a4VwU3Ql2iLYgkDIuWtw1_w9tbuuI67vE4mjmy2Y-UFNgsS9KnfCvjYw.eCtZ3ZG571dYshVcfj6cWQs7P8jpE7OF5Fpwx9GT0BY5lvhDn4kswSGlqpqhnUedVG82wvhJZJSTirCXZCSpLA

Best regards,

Dan

Data CH4 document travail

 Dear, Dr. Borza

Thank you very much indeed for your kind reply. I do really appreciate your help. I've downloaded the chapter and will work on getting an English translation of it so that I can understand the concept and the technique. Even though "je parle un peu francais, mais Je ne peux pas comprendre un chapitre entier". 

Thanks agian.

Best regards,

Ahmed