- Rotational Modulation Collimator
Rotational Modulation Collimators (or RMCs) are a specialization of the modulation collimator, an imaging device invented by
Minoru Oda. Devices of this type create images of high energy X-rays (or other radiations that cast shadows). Since high energy X-rays are not easily focused, such optics have found applications in various instruments. RMCs selectively block and unblock X-rays in a way which depends on their incoming direction, converting image information into time variations. Various mathematical transformations can then reconstitute the image of the source. RHESSIis the first mission to make use of Rotational Modulation Collimators in space.
* [http://www.physicstoday.org/pt/vol-54/iss-9/p74.html Physics Today Obituary]
* [http://sprg.ssl.berkeley.edu/~tohban/nuggets/?page=article&article_id=8 RHESSI Imaging Explained]
Wikimedia Foundation. 2010.
Look at other dictionaries:
Coded aperture — Coded Apertures or Coded Aperture Masks are grids, gratings, or other patterns of materials opaque to various wavelengths of light. The wavelengths are usually high energy radiation such as X rays and gamma rays. By blocking and unblocking light… … Wikipedia