DE1499626C3

DE1499626C3 -

Info

Publication number: DE1499626C3
Application number: DE19511499626
Authority: DE
Inventors: Hansludwig Dr. 2402 Luebeck Gerlach
Original assignee: Polygram 2000 Hamburg GmbH
Current assignee: Polygram 2000 Hamburg GmbH
Priority date: 1951-01-28
Filing date: 1951-01-28
Publication date: 1974-05-16
Also published as: DE1499626B2; DE1499626A1

Description

3 43 4

Zwischenbild erzeugt, das wiederum auf das zweite schirm 2 der Kathodenstrahlröhre 1 geschriebene er-Liniengitter 5 abgebildet wird. Dieses zweite Linien- ste Liniengitter auf das zweite Liniengitter abbildet,
gitter 5 ist mit dem ersten auf dem Leuchtschirm 2 Die in F i g. 2 dargestellte Einrichtung unterscheiabgebildeten Liniengitter derart optisch zur Deckung det sich von der in F i g. 1 dargestellten nur dadurch, gebracht, daß sich beide Liniengitter wie Positiv und 5 daß der Kathodenstrahl das thermoplastische Mate-Negativ decken, wobei eine gewisse Überlappung der rial nicht mehr durchdringt, sondern von diesem rebeiden Liniengitter keineswegs auszuschließen ist. Ein flektiert wird, so daß diese Anordnung nicht im durch das thermoplastische Material 4 nicht abge- Durchlicht, sondern im Auflicht arbeitet. Schlierenlenkter Kathodenstrahl S1 trifft demzufolge auf optisch abtastbare, z. B. thermoplastische Aufzeicheinen Gitterstab des zweiten Liniengitters 5, während io nungen setzen nämlich keineswegs einen durchsichtiein im thermoplastischen Material abgelenkter Ka- gen Träger voraus. Sie können vielmehr beidseitig thodenstrahl S 2 durch das zweite Liniengitter 5 hin- auf einem flächenhaften Informationsträger angeorddurchgeht und über ein Objektiv 6 auf ein Abtastor- net sein, z. B. auf beiden Seiten eines schallplattengan, z. B. auf einen Sekundärelektronenvervielfa- ähnlichen Körpers.Intermediate image generated, which in turn is imaged on the second screen 2 of the cathode ray tube 1 written er-line grating 5. This second line grid is mapped onto the second line grid,
grid 5 is with the first on the luminescent screen 2 The in F i g. 2, the line grating shown differently so optically to coincide with the device shown in FIG. 1 shown only by the fact that both line grids as positive and 5 that the cathode ray cover the thermoplastic mate negative, a certain overlap of the rial no longer penetrates, but can by no means be excluded from this two line grids. A is flexed so that this arrangement does not work in transmitted light through the thermoplastic material 4, but in reflected light. Schlieren steered cathode ray S 1 consequently strikes optically scannable, z. B. thermoplastic recording a grid bar of the second line grid 5, while io openings namely by no means require a transparent card carrier deflected in the thermoplastic material. Rather, they can be arranged on both sides of the method beam S 2 through the second line grating 5 to a planar information carrier and via an objective 6 to a scanning element, z. B. on both sides of a schallplattengan, z. B. on a secondary electron multiplier-like body.

eher 7 trifft. 15 Bei der in F i g. 3 dargestellten Einrichtung wirdmore likely to hit 7. 15 In the case of the in F i g. 3 device shown is

Um in dem Fall die Abtastung des thermoplasti- das auf dem Leuchtschirm 2 der Kathodenstrahl-In order to enable the scanning of the thermoplastic on the luminescent screen 2 of the cathode ray

schen Materials mit einem hinreichend kleinen und röhre 1 abgebildete Liniengitter durch das Objektiv 8rule material with a sufficiently small and tube 1 mapped line grid through the lens 8

scharf abgebildeten Punkt zu gewährleisten, ist es zunächst verkleinert auf dem thermoplastischen Ma-To ensure a sharply defined point, it is first reduced on the thermoplastic material

zweckmäßig, das abzutastende thermoplastische Ma- terial 4 abgebildet. Dieses dort erzeugte Zwischenbildexpediently, the thermoplastic material 4 to be scanned is shown. This intermediate image generated there

terial unmittelbar vor dem zweiten Liniengitter 5 an- 20 wird dann ausschließlich über ein zusätzliches Ob-material directly in front of the second line grid 5 is then exclusively via an additional ob-

zuordnen, und zwar innerhalb des Tiefenschärf eberei- jektiv 9 vorzugsweise vergrößert auf das zweite Li-assign, specifically within the depth of field 9, preferably enlarged to the second line

ches des Objektivs 3, welches das auf den Leucht- niengitter 5 abgebildet.ches of the lens 3, which is mapped onto the light line grating 5.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

1 2 essentially made up of two consecutive claims:. th, the thermoplastic material is between a closing line grids and in which the

1. Device for reproducing on thermal line grids in such a way optically to cover the thermoplastic Material recorded electrical 5 are brought that between the two lines Signals, especially television signals, tern undeflected light beyond the second route a television receiver under a used grid is in complete darkness.

tion of a light source, a scanning element and it is known on thermoplastic material

signals prerecorded between the light source and the scanning element by means of Schlieren optics

Schlieren optical arrangement seen in the io to be displayed on a projection screen. To now

essentially composed of two consecutive such, streak-optically scannable recordings

th, the thermoplastic material between them can also be reproduced on television receivers

enclosing line grids exist and in which to be able to, a facility is to be created,

. the two line grids in such a way optically to cover a circumference by means of point-by-point scanning

are brought about that between the two 15 transformations in the form of elevations and depressions

Line grids of light that is not deflected beyond the fences in the thermoplastic material is stored.

second line grid is completely in darkness, th signals in standard-compliant television signals possible.

characterized in that as light.

The light source is a cathode ray tube (1). A device is used to solve this problem

on their luminescent screen (2) by line-by-line Ab- 20 of the type mentioned in the manner,

directing the cathode ray the first line grid - that a cathode ray tube serves as the light source,

ter is shown in such a way that between two hot luminescent screens by line-by-line deflection

len lines a perfectly dark line appears, the first line grid of the cathode ray is shown

• whose line width is the same as the line width of 'in such a way that' between two light lines one illuminates Lines is selected. 25 wall-free dark line occurs whose line width

2. Device according to claim 1, characterized in that the line width of the light lines is selected to be equal. indicates that the thermoplastic material The particular advantage lies above all in the (4) Immediately in front of the second line grid (5) simple structure, since the luminescent screen is arranged in the cathode is within the deep-end ray tube or the image of the luminescent screen so the focus area one between the luminescent screen (2) 30 probably the function of the light source as well as that of the and thermoplastic material (4) exerts arranged first line grid. In addition, you can neten Objective (3), which shows the light on the easy-to-use, purely optical adjustment screen The first days of the cathode ray tube shown by the possibility of regulating the cathode ray Line grid maps onto the second line grid. the - playback conditions in an advantageous manner

3. Device according to claim 1, thereby improving considerably.

indicates that between luminescent screen (2) Further details of the invention are in

and thermoplastic material (4) a lens exemplary embodiments on the basis of figures in more detail

(8) is provided, which explains this on the light.

screen (2) of the cathode ray tube (1) shown The F i g. 1 shows a cathode ray tube 1 with dete first line grids, preferably reduced in size, 4 ° a fluorescent screen 2 very short afterglow period, on the thermoplastic material (4), on which a sawtooth voltage is applied and that between thermoplastic material the baffles of the cathode ray tube 1, such as (4) and the second line grid (5) a further ob- this is known in the television picture-Punktabtajektiv (9) it is provided, which happens on the stung, line by line a line grid of cut thermoplastic Material generated in between is 45. The writing speed of the cathode image of the first line grid is preferably enlarged. The beam is enlarged at the desired scanning speed maps onto the second line grid. identical. The one shown on the luminescent screen 2

4. Device according to one of the preceding dete line grids always has between two bright Git claims, characterized in that the terlinien a perfectly dark grid line, wherein Fluorescent screen one of the double number of lines of the 50 ideally the line width of a bright grid line TV picture has the appropriate resolution. is chosen equal to that of a dark grid line. in the

5. Device according to any one of the preceding general, this aspect ratio is about as Claims, characterized in that the 0.95: 1.05 somewhat in favor of the dark grid lines Width ratio of light to dark line to be shifted to the penumbra and is about 0.95: 1.05. . 55 take account of the resulting consequences

carry. For video playback that conforms to standards, it is necessary to place the line grid on the illuminated

To write screen 2 of the cathode ray tube 1 with standard line frequency. So now between 60 two light grid lines a perfectly dark grid line must be in the case of a television picture

The invention relates to a device with, for example, 625 lines of the luminescent screen 2 of the a resolution of recorded electrical signals, in particular 1250 lines. From this, on the luminous television signals, on a television receiver 65 screen 2 written line grid is now over using a light source, a scanner, an objective 3 on the thermoplastic material 4, gans and one between the light source and the scanner on which the signals to be scanned are in the form of ergan provided schlieren optical arrangement, the peaks and valleys are stored, a