1 January 1920, Volume 4, Issue 1, pp. 1-34  
3 articles

The Importance of the Nodal Points in Lens Testing

J. Opt. Soc. Am. 4(1), 1-8 (1920)  View: HTML | PDF

The Measurement of Diffuse Reflection Factors and a New Absolute Reflectometer

J. Opt. Soc. Am. 4(1), 9-23 (1920)  View: HTML | PDF

A New Microphotometer for Photographic Densities

J. Opt. Soc. Am. 4(1), 24-34 (1920)  View: HTML | PDF