JPS54157097A - X-ray automatic exposure control unit - Google Patents

X-ray automatic exposure control unit

Info

Publication number
JPS54157097A
JPS54157097A JP6607678A JP6607678A JPS54157097A JP S54157097 A JPS54157097 A JP S54157097A JP 6607678 A JP6607678 A JP 6607678A JP 6607678 A JP6607678 A JP 6607678A JP S54157097 A JPS54157097 A JP S54157097A
Authority
JP
Japan
Prior art keywords
luminance
ray
signal
level
input
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
JP6607678A
Other languages
Japanese (ja)
Other versions
JPS6144400B2 (en
Inventor
Hisatoshi Aoki
Hiroshi Yasuhara
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP6607678A priority Critical patent/JPS54157097A/en
Publication of JPS54157097A publication Critical patent/JPS54157097A/en
Publication of JPS6144400B2 publication Critical patent/JPS6144400B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To make a picture luminance fixed approximately, shorten the diagnosis time and reduce the X-ray exposure quantity by detecting automatically only a signal part, which is in a luminance level set previously, from X-ray TV signals and controlling exposure on a basis of the detection result.
CONSTITUTION: As regards the input of automatic exposure control circuit 2-1, TV picture signals obtained from TV camera controller 1-13 are taken as VI, and this signal VI is led to window-type comparator 3-1. Then, if upper limit set level input VU and lower limit set level input VL of this comparator are set to proper values, a signal section in a proper level set previously is detected, and control signal are generated correspondingly to only the part within a luminance level range set previously and are inputted to X-ray controller 1-12. As a result, the luminance of pictures can be fixed approximately even if parts having the extreme luminance exist on the screen, and the diagnosis time can be shortened, and the X-ray exposure quantity can be reduced.
COPYRIGHT: (C)1979,JPO&Japio
JP6607678A 1978-06-01 1978-06-01 X-ray automatic exposure control unit Granted JPS54157097A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6607678A JPS54157097A (en) 1978-06-01 1978-06-01 X-ray automatic exposure control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6607678A JPS54157097A (en) 1978-06-01 1978-06-01 X-ray automatic exposure control unit

Publications (2)

Publication Number Publication Date
JPS54157097A true JPS54157097A (en) 1979-12-11
JPS6144400B2 JPS6144400B2 (en) 1986-10-02

Family

ID=13305384

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6607678A Granted JPS54157097A (en) 1978-06-01 1978-06-01 X-ray automatic exposure control unit

Country Status (1)

Country Link
JP (1) JPS54157097A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61157343U (en) * 1985-03-20 1986-09-30

Also Published As

Publication number Publication date
JPS6144400B2 (en) 1986-10-02

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