Presentation	2002/9/13 The Design of High NA(0.85) Aspherical Single Lens for Next Generation Optical Disc System Koichi MARUYAMA, Shuichi Takeuchi,
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Abstract(in English)	As the standards of the high density optical disc system, several methods were presented that employed an object lens with NA0.85. Two element objective lenses with NA0.85 have been developed and tried for next generation optical disc system. 1)2) However, we are sure that a single lens is required which would help to achieve a longer working distance and a smaller diameter because the size and the cost shall be major factors to the future of NA0.85 lens. Here we are pleased to introduce the design concept, and also report about favorable performance of the new lens redesigned for mass production.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	NA0.85 / aspherical lens / optical disc system
Paper #	CPM2002-88
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Conference Information
Committee	CPM
Conference Date	2002/9/13(1days)
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Paper Information
Registration To	Component Parts and Materials (CPM)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	The Design of High NA(0.85) Aspherical Single Lens for Next Generation Optical Disc System
Sub Title (in English)
Keyword(1)	NA0.85
Keyword(2)	aspherical lens
Keyword(3)	optical disc system
1st Author's Name	Koichi MARUYAMA
1st Author's Affiliation	Optical Research Department, R & D Center, Asahi Optical Co., Ltd.()
2nd Author's Name	Shuichi Takeuchi
2nd Author's Affiliation	Optical Research Department, R & D Center, Asahi Optical Co., Ltd.
Date	2002/9/13
Paper #	CPM2002-88
Volume (vol)	vol.102
Number (no)	328
Page	pp.pp.-
#Pages	6
Date of Issue