Observational techniques related to differential interferometry
Abstract
The combination of the basic principle of differential interferometry with additional optical components and systems leads to a variety of observational techniques. A classification of these techniques is given. With the different systems, recording of the optical path modulation by a phase object and any of its first and second derivatives in space and time (except its second derivative with respect to time) becomes possible. Some of the systems correspond to the schlieren and shadowgraph techniques but have essential advantages. With double exposure interferometry and double slit streak interferometry the instationary components of phase objects can selectively be observed. In this way a similar effect as in the case of double pulse holography can be achieved with classical incoherent light sources.
- Publication:
-
High Speed Photography
- Pub Date:
- 1975
- Bibcode:
- 1975hsp..proc..283S
- Keywords:
-
- Differential Interferometry;
- High Speed Cameras;
- Optical Equipment;
- Photographic Recording;
- Data Reduction;
- Optical Paths;
- Prisms;
- Schlieren Photography;
- Shadowgraph Photography;
- Instrumentation and Photography