JPS5514728A - Intermediate gradation recording system for picture recorder - Google Patents

Intermediate gradation recording system for picture recorder

Info

Publication number
JPS5514728A
JPS5514728A JP8725978A JP8725978A JPS5514728A JP S5514728 A JPS5514728 A JP S5514728A JP 8725978 A JP8725978 A JP 8725978A JP 8725978 A JP8725978 A JP 8725978A JP S5514728 A JPS5514728 A JP S5514728A
Authority
JP
Japan
Prior art keywords
gradation
picture
intermediate gradation
modulated
laser beam
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
JP8725978A
Other languages
Japanese (ja)
Inventor
Yasuo Mizobuchi
Akifumi Mori
Tsutomu Saito
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 JP8725978A priority Critical patent/JPS5514728A/en
Publication of JPS5514728A publication Critical patent/JPS5514728A/en
Pending legal-status Critical Current

Links

Landscapes

  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE: To secure the necessary intermediate gradation picture at the point of the dynamic range and with the linearity of the exposure characteristics in the photosensitive system even in case the intermediate gradation is never obtained with the modulation of the normal luminous intensity.
CONSTITUTION: Laser beam 2 oscillating 1 with a fixed cycle is modulated 3 and reaches onto photoreceptor 7 of photographing device 6 through lens system 4 and diflector 5. And the picture is recorded on recording paper 8 through the flying spot scanning. The pulse duration of pulse row (b) which gives the flashing drive to beam 2 with fixed cycle T is modulated in accordance with input signal (a) showing the gradation. Thus pulse row (c) is formed. In case the nonlinearity exists in the photo sensitive system, the dot corresponding to the flashing time of the laser beam can be obtained with each degree of gradation featuring almost fixed value. Thus, the picture of the intermediate gradation can be reproduced visually owing to variation of the level of gradation.
COPYRIGHT: (C)1980,JPO&Japio
JP8725978A 1978-07-18 1978-07-18 Intermediate gradation recording system for picture recorder Pending JPS5514728A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8725978A JPS5514728A (en) 1978-07-18 1978-07-18 Intermediate gradation recording system for picture recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8725978A JPS5514728A (en) 1978-07-18 1978-07-18 Intermediate gradation recording system for picture recorder

Publications (1)

Publication Number Publication Date
JPS5514728A true JPS5514728A (en) 1980-02-01

Family

ID=13909768

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8725978A Pending JPS5514728A (en) 1978-07-18 1978-07-18 Intermediate gradation recording system for picture recorder

Country Status (1)

Country Link
JP (1) JPS5514728A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60120664A (en) * 1983-12-03 1985-06-28 Matsushita Electric Ind Co Ltd Picture copying machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS491111A (en) * 1972-04-17 1974-01-08

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS491111A (en) * 1972-04-17 1974-01-08

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60120664A (en) * 1983-12-03 1985-06-28 Matsushita Electric Ind Co Ltd Picture copying machine

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