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Rotational modulation collimator

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Invented by Minuro Oda, Rotational Modulation Collimators (or RMCs)are used to create images of high energy X-rays. Since high energy X-rays are not easily focused therefore x-ray lenses or mirrors do not exist, RMCs selectively block and unblock x-rays in a way which depends on their incoming direction.

RHESSI is the first mission to make use of Rotational Modulation Collimators in space.

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