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X-ray Imaging01:24

X-ray Imaging

German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...
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Published on: February 12, 2013

Anamorphic cameras for stellar spectrographs.

J M Simon, M C Simon

    Applied Optics
    |March 11, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Demagnifying stellar spectral lines is crucial for reducing exposure time. Anamorphic cameras are ideal for reference spectra or small focal ratio cameras, while the Bowen lens offers better results otherwise.

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    Area of Science:

    • Astronomy and Astrophysics
    • Optical Instrumentation

    Background:

    • High dispersion stellar spectroscopy can result in undesirably long spectral lines.
    • Reducing line length is necessary to minimize exposure times.

    Purpose of the Study:

    • To evaluate line profiles generated by anamorphic cameras and the Bowen lens.
    • To determine optimal optical solutions for demagnifying stellar spectral lines.

    Main Methods:

    • Obtaining line profiles using anamorphic cameras.
    • Obtaining line profiles using the Bowen lens.

    Main Results:

    • Anamorphic cameras are suitable for obtaining reference spectra or when using cameras with small focal ratios (F/D < 10).
    • The Bowen lens provides superior results for other scenarios.
    • Other considerations also influence the choice of optical system.

    Conclusions:

    • The selection between anamorphic cameras and the Bowen lens depends on specific observational requirements, such as the need for reference spectra and camera focal ratio.
    • Optimizing optical systems is key to efficient stellar spectral analysis.