DE2027786A1 - pr 11.06.69 Japan 45367-69 System for the automatic finding of a desired image section on a microfilm passing on a guideway - Google Patents

Description

Our sign? A I96 70 Ml / Ga _June 5

IWASAKI TSUSHINKI KABÜSHIKI KAISHA 1-7-41, Kugayama, Suginami-Ku, Tokyo-ίο, Japan

System for the automatic finding of a desired image section on one passing on a guideway Microfilm

The invention relates to a system for automatically finding a desired image section from one Microfilm passing on an I-guideway.

With systems of this kind, there are distraction lines that appear in the unused space of each image section of the passing image Microfilms are printed on, usually with the help of photosensitive agents such as phototransistors scanned and the thereby developed pulses fed to a control device, which determines the number of developed Counts impulses and performs the required control in the way. For scanning the deflection oaks are light-sensitive means provided on a projection screen, so that there the size of each scanning character

■ 009861/2089

can be grasped »In addition, one of the animal sides of each rectangular scanning line is set as a reference side, and the doorway of this adjacent side is determined by the. light-sensitive means detected on the projection screen as the input signal of a counter, which carries out additions or subtractions while counting the number of impulses detected can be found by * without spots or specks of dust or the like on the microfilm an incorrect count _o

In the one disclosed _{in Japanese Patent Application Ir 0 1706/1968}

proposed ssiad ssiad §msppea light-sensitive elements, so that an additive counting signal in connection with an additive instruction signal is generated when one of the two groups of light-sensitive.Elemente is just covered by a deflection mark overflowing the screen and that a subotractive counting signal in connection with a sObtr & ctive las trokti ons signal er = · - is evidenced when the other © iner deokumg duroli a preference eiacles
is covered »In other words,

liohteEpflaäliofe © "Slemtnte © 3? g ^ © © a isg DI® 'f © @ tg @@ t®llt © B pulses abMngig of & ®r respective time ₉ si welüher a group of the elements liofeteiapfindliofeea straight © by

0-098 51 / "208 9

a passing distractor covers "and to which one Time the other group of photosensitive elements is just uncovered regardless of the direction of travel of the Microfilms. However, the additive instruction signal and the subtractive instruction signal are dependent on whether the microfilm runs in the forward or reverse direction. In this system, if the two ends of the passing microfilm are wound on spools so that the microfilm has different hardnesses, so will this microfilm often in the first time of drive shifted the wrong direction so that it is shifted in the subtracting direction even if it is shifted in the adding direction, for example, by the drive mechanism should be moved. The film is also moved slightly forward and backward when the brake is on when shifting the drive speed is applied to the drive mechanism «Errors can then arise if a individual distraction marks is counted repeatedly, so that in this way the number of two image fields in the in the opposite direction are also counted.

It is therefore the object of the invention to provide a system for automatically finding a desired image field a microfilm passing on a guideway without creating errors, even if the microfilm is on the Guide track is advanced in an irregular manner.

009851/208 9

A feature of the invention are those stated Pulses generated by a group of photosensitive elements in such a way that they provide directional information and have a follow-up information. In addition, additive counting pulses and subtractive counting pulses are exclusively dependent generated by the direction of travel of the microfilm and independent of the drive direction of the microfilm.

The system according to the invention is able to automatically find a desired image field on a microfilm passing on a guideway, by counting the number of detected pulses that are generated as a function of the scanning of each rectangular deflection mark that is on an im remaining unprinted field of each image field of the microfilm is printed. The system according to the invention is provided with two groups of photosensitive elements, with detection means, storage means and output means. Each group of the photosensitive elements is arranged on a projection surface for the microfilm, so that the length of the rectangular deflection marks on the projection surface can thereby be determined. With the determination means, the length of the deflection character is determined as a function of the switched-on state of all light-sensitive means with respect to the directional information. This directional information is determined by the sequence in which the respective light-sensitive means are switched on to the switched-on state, which are located within each other.

009851/2089

Voted group, depending on the direction of movement of the microfilm is selected. The pest position means produce a pest position signal if all are light sensitive Elements that belong to the other group are put in their switched-on state, which is accordingly takes place in the direction determined by the direction information. The storage means store the direction information in the time between two consecutive Pest position signals, the output means give the pest position signal as the only detected pulse off 'if the direction information of the predetermined direction of movement of the microfilm.

The features, structure and advantages of the invention System can be based on the following, detailed description of a in the drawing Understand the embodiment shown even better. Show it:

Pig. Figure 1 is a plan view of a piece of microfilm used in the invention

Pig. 2 is a diagram showing the optical structure of the inventive System reproduces;

Pig. JJ is a schematic diagram in plan view for explanation the relationships between a deflector and the photosensitive elements on the projection screen;

009851/2089

Pig. 4 is a bloek diagram showing the tools those detected by the photosensitive elements Signals are processed further;

Fig. 5 is a block diagram showing an embodiment of a memory used in the invention ;

Fig. 6 is a block diagram for a possible circuit for Outputting the detection signals and the additive or subtractive counting pulses;

7 is a diagram showing the possible relative positions between a shifting deflector and Figure 13 shows a group of photosensitive elements in normal microfilm advancement;

Fig. 8 is a timing chart showing the pulse waveform of the photosensitive Shows elements depending on the relative position of Figure 7;

9 shows a bottom image to show the relative stems between distractors and a group of light-sensitive elements when the microfilm is reversed; and .

Fig. 10 is a timing chart showing the pulse waveforma of the photosensitive members feel öea shown in Mg ₀ 9. ". Relative positions c. ■ ■

First, aahaad tos figures 1 to - 3 of the -v @ .: r & rendet microfilm and the optisoh, 8 Aifteis d®e feoi of the systems used

9 8 5 1/20

I is with a number of picture fields 2 and a number provided by right-wing distractors 3, which on the rest unused areas are printed so that they are in a certain position to the image fields. Every field of view carries some type of information (e.g. characters, drawings, etc.) »which are then to be selected. In Pig. 2 it is shown that the system has a light source 4, a Condenser lens 5, film spools 6 and 6a, a microfilm of the shape shown in Fig. 1, which is in its normal forward direction and in the reverse direction between the film reels 6 and 6a can walk, a projection lens 8, a mirror 9, a projection surface 10 and photosensitive elements

II (e.g. a phototransistor), the photosensitive parts of which lie in the same plane as the projection surface 10. With this optical structure, the content of each image field 2 and each deflection mark 3 can be projected onto the projection surface 10, as indicated by the reference numerals 12 and 13 is indicated. The optical system essentially has an optical structure which corresponds to a completely ordinary magnifying projector. The light from the light source 4 passes through the condenser lens 5, the microfilm 7 and the projection lens 8 and is reflected by the mirror 9, so that the information contained in the image field, which is recorded on the microfilm 7, is imaged on the projection surface 10. A number of photosensitive elements 11 form two groups (11a, 11b and 11c) and (I1d, 11e and Hf) ₁ so that each group has the length

009851/208 9

of an image 13 of the deflection drawing 3 can determine. In other words, the distances of the photosensitive elements 11a (or 11d) to the photosensitive element 11c (or 11f) are substantially equal to the length of the image 13 of the deflection gauge 3 »In addition, the distance between the photosensitive elements 11c is unü. 11d smaller than the other distances.

Pig ", 4 shows that the output values of the light-sensitive elements Ha (A), Hb (B), 11c (C), Hd (D), He (E) and Hf (F) in pulse forms 14a, 14b, 14c" Hd ₉ 14e and 14f shaped and the polarity of the corresponding shaped Αυβ-input values are then converted in inverters 15a to 15f so .digital output values Xj, IL, U ^, U ₁ , E ", j and F ₁ «, the shaped signals are the Inipulewellen Α .., B ₁ , 0-, D-, E- and P ₁ in Pig. 8 and the outputs JC ₁ , H ₁ , U _{1 s} TS ^ _t Έ ^ and F ₁ are the transformed signals on the waves A ₁ , B-, G ₁ , D ₁ , E ₁ and P ₁ in FIG. 8.

The Feetpositionismittel shown in Fig. 5 with direction function and follow-up function have a large number of AND gates 16-1 to 16-15 and a number of bistable circles 17-1 to 17-12. All results of this structure are from the corresponding Output variables cfer OTD gates 16-1, 16-2,16-3,16 ^, 16-5,16-6,16-7,16 ~ 9f 16-11,16-13,16-14 and 16-15 the associated bistable! journeys 17-1 to 17-12

009 8-6 t / 2089

set and determine the length and the direction of movement of the deflection image 13, while the corresponding Output values of AND gates 16-8, 16-10 and 16-12 the associated "bistable circuits 17-7, 17.- 8 and 17-9 again Clear. The remaining bistable circles 17-1 »17-2, 17-3» 17_4, 17-5, 17-6, 17-10, 17-11 and 17-12 are represented by the Signals A * |, B-, C ^, Ä \ j, S-, C \ j, 33,., IL and FV resolved again, as shown in FIG.

The one in Pig. Memory means 6 illustrated and means for determining from the in Mg. Circles shown 5 additive detection signals pC and $, the siabtralrfcivea fixed position · signals β and β of an additive count Cp + and a subtractive count Cp have six UID gates 18-1 to 18 -6, four bistable circuits 19-1 to 19-4 and two block oscillators 20-1 and 20-2. The additive determination signal ^, and the subtractive determination signal 1 are used to the TJED gates 16-1, 16-2 ,. 16-3 ', 16-7, 16-9 and 16-11, so that it is thereby determined whether an image 13 of the deflection mark 3 is counted or not. .

In the structure described, the bistable circuits 17-1 Ms 17-12 and the bistable circuits 19-1 Ms 19-4 are designed so that they are reset in their respective deleted state, in which the outputs I ₂ , B ₂ , U ₂ , Iy S ₃ , U ₅ , B ₂ , E ₂ , JF ₂ »B ₅ , E ₃ , f _y £, ß _t 1 and I

009 8 51 / 2Og9

will lead. For the simplicity of the presentation However, these remedies are not favored in the ligiary 5 and β.

If the microfilm 7 is now shifted in its normal forward direction Ad + during operation, the image 13 of the deflecting character 5 is eo versehobeUj, as shown in FIG eokt over &"As a result of this gradual displacement of the image 13 of the Ablenkseichens 3, the pulse waveforms after Mg * 8 generated in the corresponding parts of the figures in the 4- $ 5 traci β shown. Circuits, in this EaIl the corresponding storage elements A ₁ , E ₀ and O _{0 of} the bistable circuits 17-1, 17-2 and 17-3 are represented by the corresponding output values of the UED gates 16-1, 16-2 and 16- 3 is set, whereby the length and the Bewegungsriohtung of the image 13 of the Alalenkzeichens 3 is detected, "the output values a ₃₉ B" and C "the XJTO gate 18-3 are supplied to _t so that an additive Speicheraüsgang M stability of the bi ~ Kreisea 19 -3 in temporal aigenbliek T- assumes the EH-Ziistand, while ee assumes the OFF-Zistand at time T ™. The Blockossillato ^ 20-1 is thus added to the additiTenZahliiapiils Op + ie Aiagombliek! C ₇₀ On the other hand wsrdea "

die entapreeliemdüB, Bpeiehereleiesnte U ^ ₉ E "laad I ^ der fei =» "

yy j

stable Srei® @ 17-1O ₉ 17-11 nad 17-Ϊ2 diar @ k the sugehö rigen A ^ sgaiagswerte ä® ^ m ^ ^{fettes 5} 16-13!) 16-H iM ίβ-15 set ₉ ti © teFiit di © Mmg © iaä the

e ο 9 a s 1/20

of the image 13 of the deflection mark 3 similarly determine the memory elements Ap, B ₂ and C _{2 of} the bistable circuits 17-1, 17-2 and 17-3. The output values D-, E, and P- are fed to an HO gate 18-1, so that the bistable circuit 19-1 is controlled in such a way that it generates the additive position signal U _{at the time T Q.} If the microfilm 7 is then moved further in the same normal forward direction Ad +, the additive position signal K continues to assume the EIIT state, while the associated storage elements A ₁ , B 2, G ₂ , D 1, E 1, P, and M of the bistable circles 17-1, 17-2, 17-3, 17-10, 17-11, 17-12 and 19-3 repeat the ON-ATJS switching depending on the spring passage of an image 13 of the deflection mark 3, as shown in Pig. 8 is shown. In each of the ON-AflS-holding processes, the additive counting pulse Op + is generated at the instant T ". '

If the microfilm 7 is displaced in the reverse direction while it is being driven in the normal forward direction as a result of a fluctuation in the displacement direction which can be caused by switching the moving speed, the image 13 of the deflection mark 3 is displaced so that it successively follows the relative positions of the Times T ₁₁ to SL in'TIg. 7 occupies. In this Pail, the image 13 of the deflection sign 3 successively covers the light-sensitive elements D, E and P au β in the direction from P to D, while

009851/2089

the associated storage elements D ₂ ? Ep "and Fp of the bistable circuits 17-7, 17-8 and 17-9 are not set, since the associated AND gates 16-7, 16-9 and 16-11 are closed because of the OFF state of the additive detection signal % Since the memory element ΪΓ of the bistable circuit 19-4 consequently assumes the OFF state, no subtractive counting pulse Cp- is generated either A, the corresponding memory elements CU, IL and A ~ of the bistable circuits 17-6, 17-5 and 17-4 are switched to the ElN state and thus determine the length of the image 13 of the deflection character 3, so that the additive detection signal p <and the subtractive detection signal β assume the AüS state or ElU state at time T. If the image 13 of the deflection symbol 3 is then shifted in the reverse direction, so that it sequentially the light-sensitive elements A, B, 0, D and F covers, as shown in FIG eigt, pulse waves are generated in the corresponding cables of the circuit according to FIGS. 4, 5 and 6, as shown in FIG. 10, the additive detection signal ä><and the subtractive detection signal β remaining in the OFF or EIH state. A subtractive counting pulse Op- is thus generated at the instant Τ * _& every time the image 13 of a marker 3 passes. Is also the image 13 of the distraction 3 again

00985 1/20 89

shifted in the normal forward direction so that the image 13 of the deflection mark 3 sweeps the photosensitive elements from element A to element F, the additive detection signal & (and the subtractive detection signal β assume the EIH and OFF states at time Tg, so that the additive counting pulse Cp + is generated every time a new image 13 occurs.

If the microfilm 7 is shifted in the backward movement direction Ad-, the image 13 of the deflection mark 3 is shifted in the same way as the pig. 9 shows. In this Pail, the pulse waveforms according to FIG. 10 are generated in the associated circuit parts from FIGS. 4, 5 and 6. In this case, the storage elements F ₂ , Ep and D _{2 of} the bistable circuits 17-9, 17-8 and 17-7 are set by the outputs of the AND gates 16-11, 16-9 "and 16-7 and by the Outputs of AND gates 16-12, 16-10 and 16-8 cleared. These MD gates 16-7 to 16-12 work to determine the length and the direction of displacement of image 13 of deflection character 3. The outputs F «» E ₂ and D are ^{fed to aeID} MD gates 18-5, so that a subtractive memory output N of the bistable circuit 19-4 assumes the EIH state at the instant T ^ _& ; at this point in time T, _& the block oscillator 20-2 becomes so controlled so that it generates subtractive counting pulses Op-. At a time instant T "_& , the storage element H of the bi-stable circuit 19-4 is switched to the OFF state.

00985 1/2089

In addition, the associated memory elements C ,, B, and A, of the bistable circuits 17-6, 17-5 and 17-4 are set, similar to the memory elements F ₂ "E" and D ₂ by corresponding output variables of the AND gates 16- 6, 16-5 and 16-4, as a result of which the length and direction of movement of the image 13 of the deflection character 3 is determined -2 is controlled so that at the instant T _Q the subtractive Pest position signal β is in the ON state. If the microfilm 7 is then pushed further in the reverse direction Adver, the subtractive Pest position signal β continuously assumes the Ell state, while the associated memory = »Elements F ₂ , E ₂ , D ₂ , G ^, B ,, A- and Ef of the bistable circuits 17-9» 17-8, 17-7, 17-6, 17-5, 17-4 and 19- 4 Carry out the EHT-AUB switching process as a function of each passage of the image 15 of a distraction symbol, as shown in FIG Active counting pulse Cp- generated at the moment T. _& .

When the microfilm 7 is in the normal direction of delivery

is shifted while it is being driven in Mekwärtsrfohiung, 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 character 3 is shifted so that ea one after the other Assumes relative positions from the moment T ^^ _a Ms T ^ _a in 71g · 9. In this case, the AbMIa 13 covers the Ab-

009851/2089

steering sign 3 successively the light-sensitive elements A, B and C from the direction from A to C, 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 , since the associated AND gates 16-1, 16-2 and 16-3 are closed because of the OFF state of the subtractive detection signal ff. Since the memory element M of the bistable circuit 19-3 assumes the OFF state, no additive counting pulse Op + is generated either. If the image 13 of the deflection symbol 3 is shifted further in the direction D to F in the case of the light-sensitive elements D, E and F, the associated memory elements D-, E- and F _{5 of} the bistable circles 17-10, 17-11 and 17 become -12 switched to the ON state, so that the additive plague position signal p (, and the subtractive plague position signal β each assume the ON or OFF state at time T. _& Shifted forwards so that it covers the light-sensitive elements A, B, 0, D, E and P, as shown in Pig. 7, signal waves according to Pig. Are generated at the associated parts of the circuits according to FIGS. 4, 5 and 6, while the additive detection signal oC and the subtractive detection signal ß still in the oN or are kept off-state. Thus, generated in time T _1, an additive count Op + for each image 13 of the Ablenkzeichens 3 Additionally, when the image 13 d. there is a distraction sign 3 in the back

009851/2089

2027788

- Ίο -

shifted upward so that it overflows the light-sensitive elements A, B, C, D, E and F from 1 to A, the additive I position signal pC and the subtractive position signal β take the OFF or ON state at time Tg _a so that a subtractive counting pulse Op- is generated for each image 15 from the next.

009851/2089

Claims (2)

PAiBHFANPEUCHE System for automatically locating a specific image field of a microfilm running along a guideway by counting the number of detected pulses which are generated as a function of the optical detection of each deflection mark, that a free area assigned to each image field is printed on the microfilm, thereby characterized in that the system is provided with two groups of light-sensitive elements (I1a, 11b, 11c; 11d, 11e, 11f) which are arranged on a projection surface (10) for the microfilm (7) so that they match the size of the image ( i3) of the deflection mark (3) on the projection surface (10) determine that Feststellungsmifcbel to determine the size of the image (13) of the deflection mark (3) depending on the switched-on state of all light-sensitive elements (11a, 11b, 11d, 11e and 11f). with regard to direction information which is determined by the switching sequence with which the light-sensitive elements belonging to a predetermined group are present depending on the direction of movement (Ad +, Ad-) of the microfilm and for generating a detection signal (& t β t R t ß) t when all the photosensitive elements of the other group are in the ON state 00 98 51/2089 - Ίο - correspondingly with one through the direction information determined direction that storage means (19-1,19-2) are present for storing the direction information during a time between two successive detection signals (,, "", "") and output means, which only then recognize the detected pulses (Cp +, Cp-) as a detection signal if the direction information corresponds to the predetermined direction of movement (Ad +, Ad-) of the microfilm. 2. System according to claim 1, characterized in that the deflector has a rectangular shape so that the light-sensitive Means (11a to 11f) are arranged on the Progektionsfläche (10) that they the length the figure (13) of the symbol (3). 009851/2089