JPS564129A - Focal plate - Google Patents

Focal plate

Info

Publication number
JPS564129A
JPS564129A JP7894479A JP7894479A JPS564129A JP S564129 A JPS564129 A JP S564129A JP 7894479 A JP7894479 A JP 7894479A JP 7894479 A JP7894479 A JP 7894479A JP S564129 A JPS564129 A JP S564129A
Authority
JP
Japan
Prior art keywords
portions
divided
divided portions
focal plate
slopes
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.)
Granted
Application number
JP7894479A
Other languages
Japanese (ja)
Other versions
JPS6140090B2 (en
Inventor
Kikuo Momiyama
Kazuo Fujibayashi
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP7894479A priority Critical patent/JPS564129A/en
Publication of JPS564129A publication Critical patent/JPS564129A/en
Publication of JPS6140090B2 publication Critical patent/JPS6140090B2/ja
Granted legal-status Critical Current

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Abstract

PURPOSE: To make possible the focusing of the bar-form object extending vertically or laterally by dividing the vertically divided portions which are divided horizontally at the center of the focal plate to respectively three or more portions by perpendicular lines and forming split prisms in the repsective divided portions.
CONSTITUTION: The central portion 2 of a focal plate 1 is divided by a horizontal line 3 and perpendicular lines 4, 5 and split prisms D, E...H, I are formed in the respective divided portions. The directions where the slopes of the respective split prisms protrude are made on the left side in the upper part and on the right side in the lower part and since the directions where the slopes protrude are so formed as to bend between the adjoining portions in the respective top and bottom divided portions, these have the effect of periodically changing even the bar-form object extending vertically or laterally into waveform and make focusing easy.
COPYRIGHT: (C)1981,JPO&Japio
JP7894479A 1979-06-22 1979-06-22 Focal plate Granted JPS564129A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7894479A JPS564129A (en) 1979-06-22 1979-06-22 Focal plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7894479A JPS564129A (en) 1979-06-22 1979-06-22 Focal plate

Publications (2)

Publication Number Publication Date
JPS564129A true JPS564129A (en) 1981-01-17
JPS6140090B2 JPS6140090B2 (en) 1986-09-08

Family

ID=13675988

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7894479A Granted JPS564129A (en) 1979-06-22 1979-06-22 Focal plate

Country Status (1)

Country Link
JP (1) JPS564129A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3339786A1 (en) * 1982-05-04 1985-05-23 Günther Dipl.-Finanzwirt 8520 Erlangen Alka Adjusting disc with universal split-image indicator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0157893U (en) * 1987-10-05 1989-04-11

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3339786A1 (en) * 1982-05-04 1985-05-23 Günther Dipl.-Finanzwirt 8520 Erlangen Alka Adjusting disc with universal split-image indicator

Also Published As

Publication number Publication date
JPS6140090B2 (en) 1986-09-08

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