发明名称 |
APPARAT! FOR AVLESNING AV EN OPPTEGNINGSBAERER PAA HVILKEN INFORMASJON, F.EKS. VIDEO- OG/ELLER LYDINFORMASJON ER OPPTEGNET I MINST ETT SPOR |
摘要 |
1441175 Recording and playback PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 31 Aug 1973 [2 Sept 1972 5 Sept 1972] 41111/73 Heading G5R A playback beam of radiation B from a source 5, e.g. a laser, impinges on a record carrier 1 in a spot V 1 wider than the track 2 being scanned and is diffracted on encountering any elements of recorded information b, e.g. pits of depth #/4 or optical marks; the path of the radiation from the record carrier 1 to a detector D includes a limiting aperture, e.g. a lens L, such that a part of any diffracted radiation falls outside it and does not affect the detector D. |
申请公布号 |
NO141671(B) |
申请公布日期 |
1980.01.07 |
申请号 |
NO19730003399 |
申请日期 |
1973.08.29 |
申请人 |
PHILIPS` GLOEILAMPENFABRIEKEN, N.V., |
发明人 |
BOUWHUIS, GIJSBERTUS, |
分类号 |
H04N5/85;G02B27/28;G11B7/00;G11B7/003;G11B7/005;G11B7/12;G11B7/135;(IPC1-7):G11B7/00 |
主分类号 |
H04N5/85 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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