General and practical optics / by Lionel Laurance.

  • Laurance, Lionel.
Date:
[1908]
Catalogue details

Licence: In copyright

Credit: General and practical optics / by Lionel Laurance. Source: Wellcome Collection.

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

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    —Prismatic A])erratioiis of Form.-—Distortion of Size and of Curvature.—Chromatic Aberration of Lenses.—Refractive Indices of the Spectral Lines.—Focal Length for Different Colours.— xVchromatism.—Dispersivity of a Lens.—Lateral and Longitudinal Chromatic Aberrations.—Formuhe and Calculations for Achromatic Lenses.—Chromatism of Lenses.—Combinations.—Residual Chro- matism.—Expression for Achromatism.—Dioptral Forniul;-:. Aberration of Form.—General Considerations.—Pointy Plane, Central, and Oblique Aberrations.—Chromatism and Aberrations of Form.—Apochromatic Lens.—Spherical Aberration.—Peri- pheral and Central Refraction.—Aplanatism.—Causes of Spherical Aberration.—The Remedies for Spherical Aberration.—Under and Over Correction.—Numerical Expression of Spherical AlDcrrations. —Tlie Principal of Least Possible Time. Tlie Oblique Aberrations.—Coma.—The Sine Law.—Radial Astigmatism.—The Focal Lines.—The Sagittal and Meridional Planes.—The Tangential and Radial Lines.—Curvature of the Field.—Positive and Negative Curvature. Anomalous Glasses.— Distortion, Different Forms of.—Distortion of Real and Virtual Luages by Simple Lenses.—Cause of Distortion.—The Stop and Distortions.—Correction of Distortion.—The Tangent Law. CHAPTER XIIL Polarisation and Pebbles.—Pages 358—3G2. Ordinar}^ and Polarised Liglit.—Polarisation by Reflection, bj Refraction, l)y Double Refraction.-—Ordinary and Extraordinary Rays.—Rock Crystal or Pebble.—Detection of Pebble.—Axis and Non-Axis Pebble.—Advantage of Axis-Cut Pebble.—Tourmaline.— Polarisation by Tourmaline.—The Tourmaline Pebble Tester.— Unannealed Glass. CHAPTER XIV. Simplest Pbinciples of Some Optical Instbu^ients.— Pages 3G3—369. TheCamera.—TheOpticalLantern.—The Compound Microscope.— The Opera Glass.—The Telescope.—The Sextant.—The Theodolite.— The Spectroscope.—The Spectrometer.—The Stereoscope.—The Vernier.
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