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physical object > artifact > device > instrument > optical device > wavefront modifier > optical matching |
optical matching comparison table |
Subject | has wavefront modification | has definition | is a kind of |
---|---|---|---|
wavefront modifier | shape, polarization or wavelength | A device which modifies the wavefront shape, polarization or wavelength | optical device |
optical matching | shape | The use of lenses or other optical devices to match the size of the image of the seeing disk, as it appears in the focal plane of the telescope, to the physical size of the CCD pixels. If the telescope yields 10 arcseconds per millimeter and the seeing is 1 arcsecond then the image is 0.1 mm in size. But a typical CCD pixel is 0.022 mm, five times smaller. | wavefront modifier |
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