Optical device for observing phase contrast

摘要

The arrangement has a diaphragm device arranged in an illumination ray path aligned on a sample. The device has diaphragm openings provided on a coated surface area. A surface area (2) has a coating that causes a negative shift of phase of light. Another surface area (3) has a coating that causes a positive shift of the phase. A diaphragm opening defining unit defines diaphragm openings provided on the surface areas. Another diaphragm opening defining unit defines diaphragm openings partially provided on the surface areas.