Presentation	1998/9/25 DVD/CD compatible plastic aspherical objective Norikazu Arai,
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Abstract(in Japanese)	(See Japanese page)
Abstract(in English)	DVD/CD compatible optical system which has few cost consuming restriction such as aperture restriction and/or changing magnification for CD reproduction was developed. The objective lens is designed to satisfy the spot profile performance for both media. In case of 2 laser optical system for CD-R reproduction, additional photo diode is not necessary. Tolerance of designed objective was calculated and was compared to conventional objective for DVD and that of CD. The result shows that tolerance performance of the newly designed objective is similar to that of conventional objectives. Therefore, the objective is applicable to conventional optical system without changing mechanical tolerance.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	DVD / optical system / spot profile / wavefront aberration / pick-up
Paper #	CPM98-108
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Conference Information
Committee	CPM
Conference Date	1998/9/25(1days)
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Place (in English)
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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)	DVD/CD compatible plastic aspherical objective
Sub Title (in English)
Keyword(1)	DVD
Keyword(2)	optical system
Keyword(3)	spot profile
Keyword(4)	wavefront aberration
Keyword(5)	pick-up
1st Author's Name	Norikazu Arai
1st Author's Affiliation	KONICA Corp.()
Date	1998/9/25
Paper #	CPM98-108
Volume (vol)	vol.98
Number (no)	308
Page	pp.pp.-
#Pages	7
Date of Issue