Optics: measuring and testing – By dispersed light spectroscopy – With synchronized spectrum repetitive scanning
Patent
1984-07-13
1987-04-28
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
With synchronized spectrum repetitive scanning
356326, 356332, G01J 306, G01J 332
Patent
active
046609750
ABSTRACT:
A method and apparatus for controlling the spectral components of a light beam are described. The apparatus comprises means (3-7) for generating a collimated light beam; means (9) for dispersing the collimated beam; a mask (1) including an aperture (2) the size of which is such that a portion of the dispersed beam passes through the aperture in use; and movement means (not shown) for causing relative transverse movement between the light beam and the aperture. A memory (not shown) is provided for storing in use a profile of the relative transverse movement between the light beam and the aperture (2) required to obtain a desired spectral response in the transmitted light beam, the movement means being responsive to the stored profile to cause relative transverse movement in accordance with the predetermined profile.
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Crosfield Electronics Limited
McGraw Vincent P.
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