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physical object > artifact > device > instrument > optical device > wavefront modifier > lens > aplanatic system

aplanatic system
subject			fact

aplanatic system	has definition A system of three lenses which, taken together, correct for spherical aberration, chromatic aberration, and coma.
	is a kind of lens
lens	has index of refraction
	has focal length
	has focal ratio
	has wavefront modification shape
instrument	has operator
artifact	has creator
	has creation date
	has purpose
	has owner
physical object	has location or center of gravity
	has angular momentum
	has mass
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material

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