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physical object > artifact > device > instrument > optical device > detector > imager > integrating detector > heliograph |
heliograph comparison table |
Subject | has definition | is a kind of |
---|---|---|
integrating detector | Any imaging device, like a photographic emulsion or CCD, which can build up more signal and contrast by a longer exposure to light or other electromagnetic energy. | imager |
heliograph | Device for recording the positions of sunspots. | integrating detector |
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