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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 50, Iss. 5 — May. 1, 1960
  • pp: 467–471

Measurement of Axial and Off-Axis Geometrical Aberrations of Microscope Objectives

W. M. VAIDYA and M. K. SEN GUPTA  »View Author Affiliations

JOSA, Vol. 50, Issue 5, pp. 467-471 (1960)

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An apparatus incorporating several improvements for direct measurement of aberrations in microscope objectives is described. In principle, it is similar to that of Kingslake, who by shifting a pinhole across the aperture of a microscope objective measured the resultant transverse aberration from which spherical aberration could be readily calculated. By using a different pinhole system, accuracy of setting has been improved, as also the brightness of image. Sensitivity of measurement of transverse aberration has been increased by the addition of a separate magnifying system.

The theory of measurements has been extended to extra axial aberrations and the methods of measurements of spherical aberration, offence against sine condition, tangential and sagittal curvatures have been described with aberration graphs for a typical microscope objective.

W. M. VAIDYA and M. K. SEN GUPTA, "Measurement of Axial and Off-Axis Geometrical Aberrations of Microscope Objectives," J. Opt. Soc. Am. 50, 467-471 (1960)

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  1. R. Kingslake, J. Opt. Soc. Am. 26, 251 (1936).
  2. L. C. Martin, Trans. Opt. Soc. 23, 75 (1921) ; C. Beck, Trans. Opt. Soc. 28, 37 (1926); Hartridge, Proc. Cambridge Phil. Soc. 21, 29 (1922).
  3. A. E. Conrady, Applied Optics and Optical Design (Dover Publications Inc., New York, 1957), p. 404.
  4. Equation (3) was first suggested to the authors by Mr. H. A. Unvala, Scientific Officer, Ministry of Defence, Government of India.

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