Reflection-type confocal readout for multilayered optical memory

被引：41

作者：

Ishikawa, M ^{[1
]}

Kawata, Y

Egami, C

Sugihara, O

Okamoto, N

Tsuchimori, M

Watanabe, O

机构：

[1] Shizuoka Univ, Fac Engn, Joho Ku, Hamamatsu, Shizuoka 4328561, Japan

[2] Toyota Cent Res & Dev Labs Inc, Aichi 4801100, Japan

来源：

OPTICS LETTERS | 1998年 / 23卷 / 22期

关键词：

D O I：

10.1364/OL.23.001781

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a multilayered optical memory for use in reading data with a confocal reflection microscope system. We use a recording medium in which photosensitive thin films and nonphotosensitive transparent films are stacked alternately. Since the photosensitive films are thinner than the depth of focus of the recording beam, the spatial frequency distribution of the recorded bit data is extended in the axial direction. The extended distribution overlaps the coherent optical transfer function of the reflection-type confocal microscope. Urethane-urea copolymer film is used as a photosensitive material. The recording and reading of two layers are demonstrated. (C) 1998 Optical Society of America.

引用

页码：1781 / 1783

页数：3

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