FIELD: physics.
SUBSTANCE: collimator has a lens, a test object lying in the focal plane of the lens and a test object illuminating system. The test object is a system of conductors that are connected to a stabilised current source and form at least one cross in the field of view. The illumination system is a transparent plate with a dull central area, lying immediately behind the test object and illuminated by a source of visible light, e.g. a light-emitting diode. The cross in the field of view projects beyond the boundary of the dull area. Each of the conductors of the test object can be connected to its own section of the stabilised current source, said sections having no galvanic coupling.
EFFECT: providing the required spectral brightness of the test object in strongly spread spectral ranges, high accuracy of adjusting or controlling parallelism of two or more systems that are combined into a system.
2 cl, 4 dwg
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