見かけ粒度と写真レンズの解像力との関係について

抄録

The resolving power of photographic lenses is measured by photographing a test chart, and its value depends on ΔD, the least perceptible density discrimination of the photographic negative. ΔD is influenced not only by acuity of the human eye, but also by the newly defined quantity Ga, the apparent graininess of the photographic negative. Relation between ΔD and Ga is found experimentally, and the result enabled the author to deny the contradiction in the previous paper concerning the absolute representation of resolving power.