Optics: measuring and testing – For light transmission or absorption – Of fluent material
Patent
1995-02-22
1995-10-31
Pham, Hoa Q.
Optics: measuring and testing
For light transmission or absorption
Of fluent material
356128, 356 731, G01N 2147
Patent
active
054634660
ABSTRACT:
Apparatus for analysing the optical properties of a transparent object (118) comprises a light source, an analyser cell comprising a body of solid transparent material (110) having a cavity (112) formed therein for receiving the object (118) to be analysed, and arranged so as to allow a light beam from the light source to pass through the object (118), said body (110) having an entrance surface (114) through which the light beam enters the cell from the ambient medium and an exit surface (116) through which the light beam leaves the cell, and analysing means for analysing the light beam after passage through the object (118), and is characterised in that the cavity (112) in the analyser cell is of substantially circular section in at least the region through which the light beam passes in use.
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Applied Optics, vol. 18, No. 13, 1 Jul. 1979, L. S. Watkins: "Laser beam refraction traversely through a graded-index preform to determine refractive index ration and gradient profile", pp. 2214-2222.
Applied Optics, vol. 189, No. 1, Jan. 1979, D. Marcuse et al.: "Focusing method for non-destructive measurement of optical fiber index profiles," pp. 14-22.
Pham Hoa Q.
York Technology Limited
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