|
DE941874C
|
|
Binocular tube, especially for microscopes
|
|
DE1031029B
|
|
Contrast microscope
|
|
GB732647A
|
|
Object protecting device for the automatic prefocussing of microscopes
|
|
DE939170C
|
|
Preparation-protecting device for automatic pre-focusing of microscopes
|
|
DE847813C
|
|
Interference device for surface testing
|
|
DE971490C
|
|
Microscope with device for achieving phase contrast and aperture effects
|
|
GB700209A
|
|
Microscope for achieving phase control or diaphragm effects
|
|
DE958513C
|
|
Device for determining the hardness of small bodies
|
