JPS57122308A - Measuring method for linearity of herical scan track - Google Patents

Measuring method for linearity of herical scan track

Info

Publication number
JPS57122308A
JPS57122308A JP810481A JP810481A JPS57122308A JP S57122308 A JPS57122308 A JP S57122308A JP 810481 A JP810481 A JP 810481A JP 810481 A JP810481 A JP 810481A JP S57122308 A JPS57122308 A JP S57122308A
Authority
JP
Japan
Prior art keywords
linearity
tracks
measured
magnetic tape
scan track
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP810481A
Other languages
Japanese (ja)
Inventor
Kenichi Hamano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP810481A priority Critical patent/JPS57122308A/en
Publication of JPS57122308A publication Critical patent/JPS57122308A/en
Pending legal-status Critical Current

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  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

PURPOSE: To highly accurately measure the linearity of a herical scan track, by a method wherein the positions of tracks are measured at two points on a magnetic tape a given distance separate from each other every given number of tracks in the vertical direction.
CONSTITUTION: Measured by employing a microscope or the like are the positions of intersections P10WP1n, P20WP2n between developed video tracks 11 on a magnetic tape 10 and vertical lines l1, l2 passing through two points P1, P2 separate from each other by a distance, e.g., 10CTL equivalent to 10 tracks in the longitudinal direction of the magnetic tape. Errors due to waul flutter or the like are not included, because the effects of fluctuations in the tape speeds at segments P10, P11, P21, P22 and the like are substantially equal to each other. Accordingly, the linearity of each track is calculated by means of a simple calculation. Thereby, linearity is measured with high accuracy.
COPYRIGHT: (C)1982,JPO&Japio
JP810481A 1981-01-23 1981-01-23 Measuring method for linearity of herical scan track Pending JPS57122308A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP810481A JPS57122308A (en) 1981-01-23 1981-01-23 Measuring method for linearity of herical scan track

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP810481A JPS57122308A (en) 1981-01-23 1981-01-23 Measuring method for linearity of herical scan track

Publications (1)

Publication Number Publication Date
JPS57122308A true JPS57122308A (en) 1982-07-30

Family

ID=11683987

Family Applications (1)

Application Number Title Priority Date Filing Date
JP810481A Pending JPS57122308A (en) 1981-01-23 1981-01-23 Measuring method for linearity of herical scan track

Country Status (1)

Country Link
JP (1) JPS57122308A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5142588A (en) * 1990-01-29 1992-08-25 Matsushita Electric Industrial Co., Ltd. Method of and apparatus for measuring track displacement on a magnetic tape

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5142588A (en) * 1990-01-29 1992-08-25 Matsushita Electric Industrial Co., Ltd. Method of and apparatus for measuring track displacement on a magnetic tape

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