Measuring the effective focal length and shape factor of a thick lens using a microscope

The optical power of a thick spherical lens and its Coddington shape factor are essential magnitudes that characterize its image quality. Here, we propose an experimental procedure and apparatus that allow accurate determination of those magnitudes for any spherical lens from geometrical measurements. The performance of the technique and the used instruments are simple since it only requires a microscope and an optical mouse. The propose overcomes the drawbacks of other devices that need of the refractive index or may damage the lens surfaces, like spherometers, and provides similar results to those from commercial lensmeters.

Contributions to photographic optics,

Mode of access: Internet.

The new metal worker pattern book; a complete course of instruction in the modern methods of developing and cutting the patterns for sheet metal work, giving the principles underlying practically every problem that is likely to come up in practice and explaining the selection and use of drawing tools and linear and geometrical drawing so clearly that one, who has had no previous knowledge of arithmetic or drawing, may understand these essentials and apply them in using the 253 problems in the development of patterns by the parallel line, conical or flaring, and triangulation systems.

Mode of access: Internet.

Carpentry : being a comprehensive guide book for carpentry and joinery : with elementary rules for the drawing of architecture in perspective and by geometrical rule : also, treating of roofs, trussed girders, floors, domes, stair-cases and hand-rails, shop fronts, verandahs, window-frames,shutters, &c. &c., and public and domestic buildings, with plans, elevations, sections, &c. &c./

Mode of access: Internet.

A geometrical model for the synthesis of interval covers,

"Supported by Contract AT(11-1)-2118 with the U.S. Atomic Energy Commission."

A planar geometrical model for representing multidimensional discrete spaces and multiple-valued logic functions /

Bibliography: p. 37-38.

Geometrical attenuation factors for gamma radiation from cylindrical and spherical surface sources /

Issued September 15, 1963.

Optics and lasers : a compilation /

Cover title.

First and second order beam optics of a curved, inclined magnetic field boundary in the impulse approximation /

"AEC Contract AT(04-3)-400."

Wave optics and atomics.

Physical optics.--Physical electronics.--Atomic physics.--Nuclear physics.

Photographic illustrations for projection, plain or colored ... : photographic views from nature in all parts of the world : extensive collection : astronomy, light and optics, anatomy, crystallography, physics, botany, geology, geography.

Cover title.

Physical optics or The nature and properties of light : a descriptive experimental treatise /

Mode of access: Internet.

An elementary treatise on optics /

Mode of access: Internet.

An elementary treatise on optics /

Mode of access: Internet.