Studies in the photometry of lights of different colours [electronic resource] / spectral luminosity curves obtained by the equality of brightness photometer and the flicker photometer under similar conditions (1912)
Ives, Herbert Eugene, 1882-1953, Parsons, John Herbert, Sir, 1868-1957, donor, University College, London. Library Services · [London : s.n.] · leaf 63
ours. 361 were so nearly straight as to raise expectations that the law of the flicker photometer had been found. To obtain a more conclusive test, isochromatics were then made. The spectral colour and the standard were matched by the flicker photo- meter at a series of illuminations, stepping down… … Sl/t w/dff>s w terms of 'ra/e/e a/. S60I.U. P/offed loqar//fim/ca/ty Isochromatics, showing variation in relative brightness of spectral colours due to variation of illumination, Flicker Photometer. not straight lines. The simple law anticipated does not hold. However, the effect of change of…
Ophthalmology · Eye · Light · Color blindness · Color vision · Photometry · Brightness perception · Color Vision Defects
Internet Archive · UCL Library Services, University College London (UCL) · Public domain (published before 1931). Free to use for anything.
![An illustration from Studies in the photometry of lights of different colours [electronic resource] / spectral luminosity curves obtained by the equality of brightness photometer and the flicker photometer under similar conditions, 1912, leaf 63](https://img.insideoutlibrary.com/img/1024/ia-b21287569-63-0.webp)
