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	Optical pick-up
	YOKOYAMA OSAMU; SONEHARA TOMIO; INOUE KUNIHIRO; KOMATSU HIROSHI; TERAISHI KATSUHIRO
	1989-02-16
著作权人	SEIKO EPSON CORP
专利号	JP1989043821A
国家	日本
文献子类	发明申请
其他题名	Optical pick-up
英文摘要	PURPOSE:To omit a prism for forming a beam and to miniaturize and lighten a device by making a far visual field into a circle with a surface light emitting laser as the light source of an optical pick-up. CONSTITUTION:As a semiconductor laser 10 of an optical pick-up device, a surface light emitting laser is used. For the laser, a part of thin films 21 and 22 formed at a substrate 25 goes to an active area 20 and a light 23 is seen so as to come out of the fine area of a substrate 25. By making the aperture of the surface, in which the light 23 comes out, into a circle, a far visual field pattern 24 of the light 23 is also made into the circle. Consequently, an anamorphic prism to convert a conventional elliptical light emitting pattern into a circular pattern is not necessary, and the optical pick-up can be miniaturized and lightened.
公开日期	1989-02-16
申请日期	1987-08-11
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/59522]
专题	半导体激光器专利数据库
作者单位	SEIKO EPSON CORP
推荐引用方式 GB/T 7714	YOKOYAMA OSAMU,SONEHARA TOMIO,INOUE KUNIHIRO,et al. Optical pick-up. JP1989043821A. 1989-02-16.

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