感光材料に無關係な寫眞レンズの分解能表示
1953 年 22 巻 11-12 号 p. 386-388
詳細
1953 年 22 巻 11-12 号 p. 386-388
Resolving power of a photographic lens is tested through photographing the test chart and the result is represented with the maximum number of linesper millimeter resolved. But the value varies relatively to the sort of photographic emulsion used in the test and the kind of development. A new quantity provisionally named T-number is reported, by which the quality of a photogrraphic lens is represented independently of the emulsion and development: the value is oneand the same for each measurement with any emulsion or development.
