Recording Characteristics in Magnetography by Optical WritingFootnote
Paper presented at a symposium on “Photography in the Printing Industry” organized by the Scientific & Technical Group of The Royal Photographic Society, 13-16 September 1983 at New College, Oxford.

Shunji ImamuraDepartment of Image Science and Technology, Faculty of Engineering, Chiba University, Chiba, 260, Japan

Takashi KitamuraDepartment of Image Science and Technology, Faculty of Engineering, Chiba University, Chiba, 260, Japan

Hiromitsu KosugiDepartment of Image Science and Technology, Faculty of Engineering, Chiba University, Chiba, 260, Japan

Abstract

Optical writing for magnetography is carried out by projecting the images composed of dots or lines in a reverse magnetic field on the erased or unidirectionally premagnetized sample. The written image is developed by the attraction of magnetic toners. Effects of writing temperature, bias magnetic field and initial premagnetization upon developing characteristics such as mass of attracted toners, line width and resolution are described. The samples used are Cr02 as these are considered the most suitable for thermomagnetography and Co-doped y-Fe203 to bear comparison with it.

Notes

Paper presented at a symposium on “Photography in the Printing Industry” organized by the Scientific & Technical Group of The Royal Photographic Society, 13-16 September 1983 at New College, Oxford.

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Recording Characteristics in Magnetography by Optical WritingFootnote
Paper presented at a symposium on “Photography in the Printing Industry” organized by the Scientific & Technical Group of The Royal Photographic Society, 13-16 September 1983 at New College, Oxford.

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Recording Characteristics in Magnetography by Optical WritingFootnotePaper presented at a symposium on “Photography in the Printing Industry” organized by the Scientific & Technical Group of The Royal Photographic Society, 13-16 September 1983 at New College, Oxford.

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Recording Characteristics in Magnetography by Optical WritingFootnote
Paper presented at a symposium on “Photography in the Printing Industry” organized by the Scientific & Technical Group of The Royal Photographic Society, 13-16 September 1983 at New College, Oxford.