DE2027786B2 - SYSTEM FOR AUTOMATICALLY FINDING A DESIRED PICTURE SECTION ON A MICROFILM MOVING ON A GUIDE TRACK - Google Patents

Description

3 4

automatically selects a desired image field on a light-sensitive element when the

Microfilm passing by a guideway- Microfilms and

Fig. 10 a timing chart of the pulse waveforms

pulse is counted, which depends on the value of the light-sensitive elements in the in FIG. 9

Touching of each rectangular deflection mark reveals the relative positions shown.

First of all, with reference to FIGS. 1 to 3, the th field of each image field of the microfilm and the optical structure of the microfilm used is printed on an otherwise unprinted. The system according to the invention is described with two groups of systems used in the invention, pen photosensitive elements, with detection A microfilm section 1 is equipped with a number of means, storage means and output means io image fields 2 and a number of rectangular ones. Each group of light-sensitive steering signs 3, which are printed on the otherwise unused items on a projection surface for the micro-avenge, in such a way that they are arranged in a definite film, so that the length of the right position to the fields of view is thus. Each angular deflection mark on the projection surface has some kind of information pattern (e.g. writing can be divided. With the determination means 15 characters, drawings, etc.), which is then selected depending on the length of the deflection mark. In Fig. 2 it is shown that the system detects an on-state of all light-sensitive means in light source 4, a condenser lens 5, film reels 6 with reference to the directional information. This and 6 a, a microfilm of the in Fi g. Direction information shown 1 is in the ON state of the JE ²⁰ in the reverse direction between the film spool determined by the order of the mold, the normal in its forward direction and power-6 weiligen photosensitive agent which and 6 a can run, a Projektionclinse 8, an inside a certain group are located, mirror 9, a projection surface 10 and light sensitivity is selected according to the direction of movement of the microsensitive elements 11 (z. B. phototransistors) on film. The detection means, whose photosensitive parts generate a detection signal when all photosensitive ^{planes are 2} 5 like the projection surface 10. With the elements belonging to the other group, this optical structure, the content of each image can be switched on What happens to field 2 and each deflection mark 3 on the project corresponding to the direction projected through the directional surface 10, as determined by the direction information. The storage means reference numbers 12 and 13 is indicated. The optical storage of the directional information in the time between the system essentially has an optical structure, seeing two successive detection signals corresponds to a completely normal enlargement project, the output means emit the detection signal tor. The light from the light source 4 emerges as the only detected pulse when the condenser lens 5, the microfilm 7 and the protection information of the predetermined movement direction lens 8 passes through and the mirror 9 corresponds to the direction of the microfilm. 35 reflected, so that the information obtained on the image field

The features, structure and advantages of the formation recorded on the microfilm 7

Systems according to the invention can be mapped onto the projection surface 10 by hand. One

The number of photosensitive elements 11 forms two in the following, detailed description

one of the execution groups shown in the drawing (11a, lift and lic) and (lld, He and

for example understand even better. It shows 4 ° 11 /), so that each group has the length of an image 13

F i g. Figure 1 is a top view of a piece of microfilm that deflector 3 can detect. With others

as it is used in the invention, words, the distances between the light-sensitive egg-

Fig. 2 is a diagram showing the optical structure mentella (or lld) for the light-sensitive egg

of the system according to the invention, ment lic (or 11 /) are essentially the same as the

3 shows a schematic representation in plan view of the length of the figure 13 of the deflection mark 3.

Explanation of the relationships between an ab- In addition, the distance between the light-sensitive

Lenkzeichen and the light-sensitive elements lent elements lic and Hd smaller than the rest

on the projection screen, distances.

F i g. 4 is a block diagram showing the tools F i g. 4 shows that the output values of the light shows with which the signals detected by the light-sensitive EIe-5 ° sensitive elements Ha (A), Hb (B), Hc (C), elements are further processed Hd (D), He (E ) and Hj (F) shaped in pulse shapes 14 a, den, 14 b, 14 c, 14 d, 14 e and 14 / and the polar

5 shows a block diagram to illustrate an embodiment example of the corresponding formed output values of a memory used in the invention in inverters 15 a to 15 / to form digital outputs. 55 values Ä ~ _v B ₁ , Cj, Z5 ,, E ₁ and F _{1 are} transformed.

Fig. 6 is a block diagram for a possible The shaped signals are the pulse waves A ₁ , B _v

Circuit for outputting the detection signals and C, D ₁ , E ₁ and F ₁ in FIG. 8, and the outputs / T ₁ .

of the additive or subtractive counting pulses, B ₁ , C ₁ , T) ₁ , E ₁ and F ₁ are the converted signals

FIG. 7 is a diagram showing the possible relative waves on the waves A _v B ₁ , C ₁ , D ₁ , E ₁ and F ₁ in FIG. 8.

Positions between a shifting ab- 60 The locking means shown in Fig. 5 with

steering signs and a group of light-sensitive EIe directional function and follow-up function have a

mente in the normal forward movement of the microfilm a plurality of AND gates 16-1 to 16-15 and one

shows a multitude of bistable circles 17-1 to 17-12.

8 is a timing chart showing the pulse wave As a result of this construction, the

shape of the light-sensitive elements depending on 65 speaking output quantities of the AND gate 16-1,

the relative position according to FIG. 7 plays, 16-2, 16-3, 16-4, 16-5, 16-6, 16-7, 16-9, 16-11,

9 is a diagram showing the relative 16-13, 16-14 and 16-15 the associated bistable

Positions are set between distraction marks and a group of circles 17-1 to 17-12 and represent the

Length and the direction of movement of the storage elements A ₂ , B ₂ , C ₂ , D ₃ , E ₃ , F _{3 associated with the deflection time}

chenbildes 13, while the corresponding Aus and M of the bistable circles 17-1, 17-2, 17-3, 17-10,

input values of AND gates 16-8, 16-10 and 16-12 17-11, 17-12 and 19-3 the ON-OFF switching as-

the associated bistable circuits 17-7, 17-8 and 17-9 repeat depending on each passage of a picture

delete again. The remaining bistable circles 17-1, 5 of 13 of the deflection sign 3, as shown in FIG.

17-2, 17-3, 17-4, 17-5, 17-6. 17-10, 17-11 and 17-12. With each of the ON-OFF switching operations

are given by the SJgUaIeZ ₁ , B ₁ , C ₁ , Z ₁ , F ₁ , U ₁ , D ₁ , the additive counting pulse becomes at the instant T.

E ₁ and F _{1 released} again, as generated in FIG. 5, Cp +,

shows is. Becomes the microfilm 7 in the reverse direction

The in F i g. 6, storage means and means io shown are shifted, while in normal forward direction it is used for determination from the means shown in FIG. 5 circles direction shown is driven as a result of a Schwander additive detection signals α and ä, the sub- kung of the shift direction, which by Umschali tractive detection signals β and j? an additive th of the movement speed caused counting pulse Cp + and a subtractive counting pulse, the image 13 of the deflection pulse Cp- has six AND gates 18-1 to 18-6, 15 chens3 shifted so that it successively the district bistable circles 19-1 to 19-4 and two block relative positions of the times T ₁₁ to T ₁ in FIG. 7 include oscillators 20-1 and 20-2. The additive observation. In this case, the image 13 covers the lungssignal λ and the subtractive detection signal ^ deflection 3 one after the other the photosensitive is used to the AND gates 16-1, 16-2, 16-3, borrowed elements D, E and F from the direction of F 16-7, 16-9 and 16-11, so that by doing this it is determined whether an image 13 of the deflection sign 3 D ₂ , E ₂ and F _{2 of} the bistable circuits 17 -7, 17-8 and counted or not. 17-9 are not set because the associated AND

In the structure described, the bistable gates 16-7, 16-9 and 16-11 are due to the OFF state

Circuits 17-1 to 17-12 and the bistable circuits 19-1 of the additive detection signal «closed

to 19-4 so that they are in their respective 25. Since the storage element N of the bista-

deleted state are reset, in which the circuit 19-4 assumes the OFF state

Outputs Z ₂ , B ₀ , C ₂ , Z ₃ , B " _s , C ₃ , ZJ ₂ , E ₂ , F ₂ , 7J ₃ , E ₃ , also no subtractive counting pulse Cp- generated.

F ₃ , <x, β, Ή and N switch-on states if when the image 13 of the deflection symbol 3 is on the

Power is supplied. For reasons of the single light-sensitive elements C to A ,

For the sake of illustration, these means in FIG. 5 are pushed in the direction from C to A

and 6 not shown, however. the corresponding storage elements C ₃ , B ₃ and A ₃

If, during operation, the microfilm 7 is shifted in its north bistable circles 17-6, 17-5 and 17-4 in the forward direction Ad + , then the ON state is switched and thus set the length of the image 13 of the deflection mark 3 so shifted as image 13 of the deflection mark 3 so that it shows FIG. 7, so that it successively the 35 additive detection signal α and the subtractive solid light-sensitive elements A, B, C, D, E and F position signal β the OFF -State or ON-Covered As a result of this gradual shift, assume at time T _t. Then, when that of the image 13 of the deflector 3, the im- image 13 of the deflector 3 in the reverse pulse waveforms shown in FIG. 8 is generated shifted in the respective direction, so that in sequence the associated parts of the light-sensitive elements A, B, C, D and F shown in FIGS. 4, 5 and 6 are transmitted. In this case, they are covered as shown in FIG. 9 shows, pulse wave-related storage elements A ₁ , B ₂ and C _{2 of} the bistable are generated, in the corresponding parts of the circuit, circuits 17-1, 17-2 and 17-3 are generated by the corresponding ones according to FIGS. 4, 5 and 6, as shown in FIG. 10, the output values of the AND gates 16-1, 16-2 are set at the additive detection signal α and the sub- and 16-3, thereby increasing the length and the 45 tractive detection signal β remain in the OFF or ON direction of the image 13 of the deflection mark 3 state. It becomes a subtractive one! is detected. The output values A ₂ , B ₂ and C ₂ count pulse Cp- generated at the instant T _ka , each fed to the AND gate 18-3, so that whenever the image 13 of a deflection character 3, the additive memory output M of the bistable circuit passes. Is also the image 13 of the ex-19-3 in the time instant J ₄ to the ON state Toggle 50 directing character 3 back into the normal forward Rich Referring while the shifted OFF state at the time tion, so that the image 13 of the Ablenkzei- T ₁ The block oscillator 20-1 thus generates 3 the light-sensitive elements of EIeden the additive counting pulse Cp + at the moment T ₇ . mentZ to element F, the ad-On the other hand, the corresponding storage-ditive detection signal χ and the subtractive fixed elements D ₃ , E ₃ and F _{3 of} the bistable circuits 17-10, 55 position signal β are in the ON or OFF state 17-11 and 17-12 by the associated output time T _s , so that the additive counting pulse values of AND gates 16-13, 16-14 and 16-15 ge Cp + is generated every time a new one is set , which thus the length and the direction of movement image 13 occurs

of the image 13 of the deflection mark 3 notice the microfilm 7 in the backward movement

lent to the memory elements A _2, B ₂ and C ₂ shifted the direction bista- 60 ad, so the image is 13 de

two circles 17-1, 17-2 and 17-3. The output values of the deflection character 3 are shifted as shown in FIG

D ₈ , E ₃ and F ₃ are shown to an AND gate 18-1. In this case, the pulse waveforms

guided so that the bistable circuit 19-1 as shown in FIG. 10 in the associated circuit parts aui

what is controlled is that it generates the additive fixed Fig. 4, 5 and 6 _{at time J 8. In this case di <}

Position signal α is generated when microfilm 7 is used as storage elements F ₂ , E ₂ and D _{2 of} the bistable circuit

after in the same normal forward direction Ad + - 17-9, 17-8 and 17-7 through the outputs of the AND

moved on, the additive determination gate takes 16-11, 16-9 and 16-7 set and through dii

signal α continues to enter the ON state, while the outputs of AND gates 16-12, 16-10 and. 16-1

turned off. These AND gates 16-7 through 16-12 operate to determine the length and direction of displacement of the image 13 of the deflection character 3. The outputs F., E., and D ₂ are fed to the AND gate 18-5 , so that a subtractive memory output N of the bistable circuit 1.9-4 assumes the ON state at the instant T _{40 of the line;} At this point in time r _4u , the block oscillator 20-2 is controlled in such a way that it generates subtractive counting pulses Cp- . At a time instant T _la , the storage element N of the bistable circuit 19-4 is switched to the OFF state. In addition, the associated memory elements C ₃ , B ₃ and A _{3 of} the bistable circuits 17-6, 17-5 and 17-4 are set, similar to the memory elements F ₀ , E ₂ and D ₂ by corresponding output variables of the AND Gates 16-6, 16-5 and 16-4, whereby the length and direction of movement of the image 13 of the deflection mark 3 is determined; the outputs C ₁ , B 3 and A ₃ are fed to the AND gate 18-2, so that the bistable circuit 19-2 is controlled so that the subtractive detection signal β is in the ON state _{at the instant T 8.} If the microfilm 7 thereafter further moved in the backward direction ad takes the subtractive Feslstellungssignal β continuously to the ON state, while the associated memory elements F _9, E _2, D _2, C "B" A. and N of the bistable circuits Γ7 -9, 17-8, 17-7, 17-6, 17-5, 17-4 and 19-4 carry out the ON-OFF switching operation depending on each pass of the image 13 of a distraction mark, as shown in FIG. 9 shows. With every ON-OFF switching process, a subtractive counting pulse Cp- is generated at instant T ₄₀ .

If the microfilm 7 is displaced in the normal conveying direction while it is being driven in the reverse direction, which may be the result of a fluctuation in the direction of movement due to a switching of the running speed, the image 13 of the deflection mark 3 is displaced so that it successively assumes the relative position from the moment 7 ' _n ' to T ₁₁₁ in FIG. In this case, the image 13 of the deflection mark 3 successively covers the light-sensitive elements A, B and C from the direction from A to C ₁ while the associated memory elements A ₂ , B ₂ and C _{2 of} the bistable circles 17-1, 17-2 and 17-3 are not in the set state because the associated AND gates 16-1, 16-2 and 16-3 are closed because of the OFF state of the subtractive detection signal ~ ß . Since the storage element M of the bistable circuit 19-3 assumes the OFF state, no additive counting pulse Cp + is generated either. If the image 13 of the deflection mark 3 is shifted further in the direction D to F in the light-sensitive elements D, E _{and F, the associated memory elements D 3} , E ₃ and F _{4 of} the bistable circles 17-10. 17-11 and 17-12 are switched to the ON state, so that the additive detection signal α and the subtractive detection signal β each assume the ON or OFF state at time T ₄₀ . If then another image 13 of a deflection mark 3 is shifted in the normal forward direction so that it covers the light-sensitive elements A, B, C, D, E and F, as shown in FIG. 7 shows, signal waves as shown in FIG. 8 on the associated parts of the circuits according to FIG. 4, 5 and 6 are generated while the additive detection signal α and the subtractive detection signal β are still held in the ON and OFF states. As a result, at time T _1, an additive counting pulse Cp + is generated for each image 13 of the deflection mark 3. If the image 13 of the deflection mark 3 is shifted again in the reverse direction, so that it overflows the light-sensitive elements Λ, B, C, D, E and F from F to A , the additive detection signal α and the subtractive detection signal β take the OFF or ON state at time T ₈₀ , so that a subtractive counting pulse Cp - is generated for each image 13 from the next.

For this purpose 3 sheets of drawings

tO953d / 49 <

Claims (2)

1 O 2 of each rectangular scanning mark as a reference page Patent claims: defined, and the passage of this reference page is determined by the photosensitive means on the 1. System for the automatic detection of a projection screen as an input signal of a counter determined by an image field determined on a guide 5, the counting of the number of the fixed path along the microfilm by means of impulses added or subtracted counting the number of determined impulses that performs. The system is designed in such a way that the stopping points of the passing microfilm, depending on the optical detection, are generated on the microfilm in each deflection mark, which is precisely controlled on the microfilm in the normal direction of passage as well as in the direction of passage around a free area assigned to each image field is printed, thereby, without being indicated by stretching or grains of dust, that the system with two or the like. On the microfilm an incorrect count of groups of light-sensitive elements (11a, Ub, comes. lic; lld, lie, 11 /) is provided, which on In a proposed system two groups of a projection surface (10) are provided for the microfilm (7) 15 pen of light-sensitive elements so that they are arranged so that they match the size of the additive Counting signal in connection with an image (13) of the deflection mark (3) on the pro-additive instruction signal is generated when a projection surface (10) detects that the two groups of light-sensitive elements are detected by means of determining the size of the image the screen overflowing Ab- (13) of the deflection mark (3) is covered depending on the 20 steering mark and that a subtractive switch-on state of all light-sensitive EIe counting signals in connection with a subtractive element (11a, lift, lld, lie and 11 /) in view Instruction signal is generated when the other one of the direction information, which is determined by the two groups of light-sensitive elements switching sequence, with which light is dependent on the nature of the light, especially after it has been completely covered by sensitive elements that belong to a group that is determined to be uncovered again by a passing distraction sign. In other words, the two groups of the direction of light travel (Ad +, Ad-) of the microfilm sensitive elements generate the detected present and generate a fixed pulse depending on the time at which position signal (α, β, ä, / S ), if all light-sensitive elements of the other group are in the ON state due to a passing distraction sign, corresponding with a direction covered by the and at what time the other group of directional information that the light-sensitive elements are straight uncovered storage means (19-1, 19-2) are present, regardless of the direction of travel of the microfilm. Storage of the directional information during the additive instruction signal and the subtractive of a time between two consecutive 35 instruction signals, however, depend on whether detection signals (α, β, κ, / J) and the output of the microfilm in the forward or in the return mean, which is only then the detected impulses runs downwards. In this system , when recognizing the (Cp +, Cp-) as a detection signal, both ends of the passing microfilm on when the direction information of the predetermined reels are wound so that the microfilm lower moving direction (Ad +, Ad-) of the micro- 40 different rolling hardness has, then this microfilm is equivalent to films. often in the first time the drive in the wrong 2. System according to claim 1, characterized shifted direction so that it draws in the subtraction, that the distraction rectangle shape is shifted direction, even if it is through the has so that the photosensitive means (Ha to drive mechanism for example in the addition 11 /) so arranged on the projection surface (10) 45 direction is to be shifted. The movie will too are that it moves the length of the figure (13) slightly forward and backward when Identify the sign (3). the brake is applied to the drive mechanism when the drive speed is switched. It errors can arise if a single 50 nes distraction mark is counted repeatedly so that in this way the number of two image fields that have been shifted in the opposite direction, The invention relates to a system for automatic additional counting. See Finding a Desired Image Section It is therefore an object of the invention to provide a system of a microfilm that is placed on a guide track 55 for the automatic finding of a desired image passes by. field on a track passing on a guideway With such systems, distraction marks are created to create running microfilm without errors, even which is moved in a regular manner in the unused space of each image section when the microfilm is printed on the guide track in and passing microfilms,
Licherweise with the help of light-sensitive means 60. According to a feature of the invention, the like photo-transistors are scanned and the pulses thereby undetected are fed from a group of light-sensitive pulses to a control device, generated in such a way that they count the number of developed pulses in a direction have management information and a follow-up information, in which way performs the necessary control. There are also additive counting pulses and sub-For scanning the deflection characters, light-sensitive counting pulses are provided on a projection screen, depending exclusively on the borrowed means, the direction of movement of the microfilm is generated and so that the size of each scanning character is detected there by the direction of the drive of the microfilm,
can be. In addition, one of the four sides The system according to the invention is able to