Optical device for the observation of an elongated object
AssigneeThomson-CSF
InventorsJean-Claude Lehureau, Sophie Neubert
Life of this patent
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Abstract
For the observation of an elongated object or an elongated zone (12) of an object with a lens (20, 20', 54), in the vicinity of this object or zone (12), a cylindrical lens (23) is used whose axis (Ox) extends along the largest dimension of the object or the zone. In this way, the observation is performed with a large resolution on an extended field.
Claims18
A device for observation, with an observation lens, of an elongated objected or an object elongated zone, said device comprising, in the vicinity of, or in contact with, the object or the zone:
- a first cylindrical lens including an axis extending along the largest dimension of said object or zone, wherein the focal distance of said first cylindrical lens is small relative to the focal distance of said observation lens and wherein said observation lens is constructed so as to allow the observation of the whole of said elongated object observable from said first cylindrical lens.
A device for observation, with an observation lens, of an elongated object or an object elongated zone, said device comprising, in the vicinity of, or in contact with, the object or the zone;
- a first cylindrical lens including an axis extending along the largest dimension of said object or zone, wherein the focal distance of said first cylindrical lens is small relative to the focal distance of said observation lens and wherein the field of observation of said device has a length substantially equal to a length of said object which is to be observed.
Dependencies are inferred from the claim text.