SU105386A1 - The method of scanning images in a photo-telegraph apparatus with electronic scanning - Google Patents

The method of scanning images in a photo-telegraph apparatus with electronic scanning

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Publication number
SU105386A1
SU105386A1 SU454251A SU454251A SU105386A1 SU 105386 A1 SU105386 A1 SU 105386A1 SU 454251 A SU454251 A SU 454251A SU 454251 A SU454251 A SU 454251A SU 105386 A1 SU105386 A1 SU 105386A1
Authority
SU
USSR - Soviet Union
Prior art keywords
scanning
photo
images
telegraph apparatus
electronic
Prior art date
Application number
SU454251A
Other languages
Russian (ru)
Inventor
Е.А. Никитин
Н.И. Светлов
Original Assignee
Е.А. Никитин
Н.И. Светлов
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 Е.А. Никитин, Н.И. Светлов filed Critical Е.А. Никитин
Priority to SU454251A priority Critical patent/SU105386A1/en
Application granted granted Critical
Publication of SU105386A1 publication Critical patent/SU105386A1/en

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Description

Изображени , получаемые на фототелеграфных аппаратах с электронной разверткой по строке методом бегущего луча, имеют два существенных недостатка:The images obtained on photo telegraph devices with electronic scanning of a line by the method of a traveling beam have two significant drawbacks:

1.На изображении наблюдаютс  продольные полосы различной интенсивности , которые возникают из-за неоднородной структуры, а следовательно , и неодинаковой светоотдачи экрана в различных его точках.1. The image shows longitudinal stripes of varying intensity, which arise due to the inhomogeneous structure and, consequently, uneven light output of the screen at different points.

2.Изображение имеет  рко выраженную строчную структуру. Она объ сн етс  неравномерным потемнением фотобумаги по ширине строки из-за неравногмерного распределени   ркости в п тне в зависимости от рассто ни  до центра п тна (по радиусу).2. The image has a pronounced line structure. It is due to an uneven darkening of the photo paper across the width of the line due to an uneven distribution of brightness in the spot depending on the distance to the center of the spot (radius).

Эти недостатки особенно заметны на полутоновых изображени х.These drawbacks are especially noticeable on halftone images.

При попытке устранить эти недостатки путем уменьшени  шага кадровой развертки наблюдаетс  потер  четкости изображени  из-За перекрыти  строк.In an attempt to eliminate these shortcomings by reducing the vertical scanning step, there is a loss of image clarity due to overlapping lines.

В предлагаемом способе, с целью устранени  указанных недостатков и улучшени  качества изображени , дл  развертки использу ют растр сIn the proposed method, in order to eliminate the indicated drawbacks and improve image quality, a raster with

вертикальными строками, а также примен ют оптическую систему, состо щую из цилиндрических и сферических линз, имеющих различные коэффициенты увеличени  в вертикальном и горизонтальном направлени х .vertical lines as well as an optical system consisting of cylindrical and spherical lenses having different magnification factors in the vertical and horizontal directions.

Сущность изобретени  по сн етс  чертежом, на котором схематически изображен экран электронно-лучевой трубки /, оптическа  система 2 и объект передачи (или фотобумага ) 3. Развертывающее п тно отклон ют не по одной строке, а по растру , линии которого располагаютс  на экране / вертикально и имеют длину . где d-диаметр развертывающего п тна, а К 1 (например /C 10-f-50). Растр при помощи оптической системы 2, имеющей разные коэффициенты увеличени  по вертикали и по горизонтали, проектируетс  на объект передачи или на фотобумагу 3. В качестве оптической системы 2 можно использовать объектив, состо щий из комбинации цилиндрических или цилиндрических и сферических линз.The invention is illustrated in the drawing, which schematically shows the screen of the cathode ray tube /, optical system 2 and the transfer object (or photographic paper) 3. The developmental spot is not deflected along one line, but along a raster whose lines are located on the screen / vertically and have a length. where d is the diameter of the scanning spot, and K 1 (for example, / C 10-f-50). A raster using an optical system 2 having different magnification factors both vertically and horizontally is projected onto a transfer object or photographic paper 3. As an optical system 2, an objective can be used consisting of a combination of cylindrical or cylindrical and spherical lenses.

Если коэффициент увеличени  оптики по горизонтали вз т равным Эг,If the horizontal optics magnification factor is equal to Eg,

SU454251A 1956-04-28 1956-04-28 The method of scanning images in a photo-telegraph apparatus with electronic scanning SU105386A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU454251A SU105386A1 (en) 1956-04-28 1956-04-28 The method of scanning images in a photo-telegraph apparatus with electronic scanning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU454251A SU105386A1 (en) 1956-04-28 1956-04-28 The method of scanning images in a photo-telegraph apparatus with electronic scanning

Publications (1)

Publication Number Publication Date
SU105386A1 true SU105386A1 (en) 1956-11-30

Family

ID=48378790

Family Applications (1)

Application Number Title Priority Date Filing Date
SU454251A SU105386A1 (en) 1956-04-28 1956-04-28 The method of scanning images in a photo-telegraph apparatus with electronic scanning

Country Status (1)

Country Link
SU (1) SU105386A1 (en)

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