The principles and methods of geometrical optics : especially as applied to the theory of optical instruments / by James P. C. Southall.

  • Southall, James P. C. (James Powell Cocke), 1871-1962.
Date:
1913
Catalogue details

Licence: In copyright

Credit: The principles and methods of geometrical optics : especially as applied to the theory of optical instruments / by James P. C. Southall. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

    682/702 (page 612)
    in the meridian and sagittal sections, with respect to the I. and II. object-points S, S, respectively. Similarly, also, i, i denote the magnification-ratios with respect to 5, 5 (see 45a). L 153a, Ly L' are used to denote the Focal-Point Convergences; thus, L = n/x, Lf = n'lx' (see 107). P 757a. In the Appendix to Chap. XI, the symbols P, P' (also P, P') are used to denote the so-called reduced convergences (p. 366g), defined by the relations: P = n/p, Pr = n'/p', P = n/p, Pr — n'jp'. (See 95b and 155.) In a centered system of spherical surfacesPk, Pk (Pa, P&O are used with respect to the &th surface, thus: Pa = riklpk, Pk = nk+i/pi/, etc. U 159a, U, W are used to denote the Principal-Point Convergences (pages 366g and 366I); thus, U = n/u, U' = n'/u' (see 102 and 155). In a centered system of spherical surfaces: Uk = nk/uk, Uk - tik+i/uk.