CN1204069A - Film processing apparatus and film processing method - Google Patents

Film processing apparatus and film processing method Download PDF

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Publication number
CN1204069A
CN1204069A CN 98115163 CN98115163A CN1204069A CN 1204069 A CN1204069 A CN 1204069A CN 98115163 CN98115163 CN 98115163 CN 98115163 A CN98115163 A CN 98115163A CN 1204069 A CN1204069 A CN 1204069A
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China
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film
detection signal
cinefilm
unusual
electrode
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CN 98115163
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Chinese (zh)
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稲留洁
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Sony Corp
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Sony Corp
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Priority to CN 98115163 priority Critical patent/CN1204069A/en
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Abstract

A movie film image projecting device wherein a movie film is intermittently stopped in a manner synchronized with rotation of a sprocket by means of travel-synchronizing holes which have been formed longitudinally with respect to the movie film and a light from a light source is projected on a stated region of the movie film at a stopped base position. Detectors for detecting at a plurality of locations the displacement of the film from the base position at the time the movie film has stopped, on the basis of the travel-synchronizing holes, output a different position detection signal corresponding to the deviation of the film from the base position at each of the plurality of locations. An abnormality judging circuit supplied with the position detection signals determines whether or not the position detection signals are abnormal and outputs an abnormality detection signal for each of the position detection signals which is determined to be abnormal. An optical axis correcting unit supplied with the position detection signals and the abnormality detection signals then corrects the optical axis of light transmitted through the movie film on the basis of the position detection signals which are judged by the abnormality judging means to be not abnormal.

Description

Film processing device and method
The present invention relates generally to film processing device and method, more particularly, for example the present invention relates to the work that reappears image from cinefilm or always can fuzzy film processing device and the method for pin-point accuracy ground corrected image in the work of cinefilm picture record.
In film processing device, as Film Recording device, the projection of picture record to cinefilm is recorded in projector visual on the cinefilm and being recorded in the telecine unit that image conversion becomes TV signal on the cinefilm, adopts continuous film trasport method or intermittent film transport method as the method for carrying cinefilm usually.
Adopt continuous film trasport method, carry cinefilm with constant speed by walking belt wheel.On the direction of the direction of walking about perpendicular to film, the light that repeats the one dimension operation is applied on the cinefilm.On the other hand, adopt the intermittent film transport method, utilize on film, pass and along the film perforation (being the rectangle film perforation) that film is vertically embarked on journey and arranged, carry cinefilm off and on by the mobile film mode of one time one frame.Film perforation is meshed with the registration pin that cam mechanism drove of the cinefilm of intermittently walking about.
Under the situation of continuous film trasport method,, also must make walking about of illumination light and walking about synchronously of film even the load amplitude that is applied on the cinefilm is little.If walking about of illumination light and walking about not exclusively synchronously of cinefilm, in some cases, the shake and/or the flicker that produce displayed image on vertically at film.
On the other hand, under the situation of intermittent film transport method, though compare with continuous film trasport method, the number of times of shake or flicker can reduce to low numerical value,, must allow cinefilm suspend on the precalculated position off and on.If cinefilm does not suspend on the precalculated position, show image on screen so with smudgy, cause the picture quality degradation of image.As a result, spectators produce inharmonic sensation.
In order to address the above problem, need provide a kind of sensor that detects the cinefilm position.Utilize the signal of this sensor output that image blurring is proofreaied and correct.
Yet in many cases, a cinefilm generally includes the part cinefilm of a plurality of mutual linkings.The technology that a part of cinefilm is connected to another part film need be provided, wherein, the contact pin band at the two ends of two cinefilms is bonded together the technology that produces a splice point, shown in Figure 11 (A) and the sheared edge of the termination of each cinefilm part, be connected the technology of an overlay contact of formation mutually, shown in Figure 11 (B).
The part cinefilm that comprises a plurality of mutual linkings at an aforesaid cinefilm in this case, the thickness of coupling part and other physical characteristics thereby can be different with remainder.Therefore, utilize the film position transducer to be difficult to correctly detect the position of cinefilm coupling part.In this case, attempt sometimes and will image blurring be compensated according to the signal of sensor output, the degree of image blurring can increase on the contrary.
In order to address the above problem, the present invention allows image blurring to be compensated with pin-point accuracy always.
According to one embodiment of the present of invention, film processing device comprises a plurality of film position detecting devices that the film position is detected that are arranged on the diverse location.
According to another embodiment of the present invention, the film disposal route is characterised in that: according to the one or more signals that are arranged on a plurality of film position detecting devices output that the film position is detected on the diverse location, with this method the film position is proofreaied and correct.
More particularly, the film processing device of film being handled according to the present invention comprises: a plurality of film position detectors that are arranged on the diverse location, and each detecting device detects the position in the relative precalculated position of film and exports an independent position detection signal; With the abnormality juding circuit that position detection signal provides, it determines whether position detection signal unusually also exports the anomaly detection signal that is confirmed as each unusual position detection signal; And the offset corrector that provides with position detection signal and malposition detection signal, it is judged to be the offset that not unusual position detection signal is proofreaied and correct film according to described abnormity determining device.In preferred embodiment, the offset corrector carries out optical correction to the offset of film.
Preferred embodiment also comprises the film guiding device that guides described film and produce the perforate that allows light pass through on the film guiding device.On the position that enough separates each other the film position detector is being arranged on the film guiding device, so that any contact that exists in the film can not become the target that all film position detectors carry out position probing simultaneously.Preferably, the upstream and downstream side of the perforate that produces on relative film guiding device at least is provided with the film position detector.
The film disposal route of film being handled according to the present invention comprises step: detect position and the output and the corresponding position detection signal in each position in the relative precalculated position of film at diverse location; Determine whether position detection signal unusually also exports the anomaly detection signal that is confirmed as each unusual position detection signal; And be judged to be not unusual position detection signal according to the abnormality juding step offset of film is proofreaied and correct.The step of proofreading and correct the film offset preferably comprises the step that the optical axis of the light by seeing through film is proofreaied and correct.
When the abnormality juding step all is judged to be all position detection signals when unusual, the offset aligning step is proofreaied and correct the offset of film according in the preceding result of adopted position detection signal in the output of film position probing step in once proofreading and correct.Film position probing step is along carrying out simultaneously on each position that separates on the film length, thereby any contact that appears on the film can not become the target of carrying out position probing in all film position probing steps simultaneously.
Film disposal route of the present invention further comprises step: carry out the film position probing to the film channeling conduct on the opening that allows light pass through with at the adjacent openings place.Film position probing step is to carry out in the upstream side and the downstream of the relative opening walking of film distance at least.
Consider following to the detailed description of preferred embodiment of the present invention and in conjunction with the accompanying drawings, be easier to understand above-mentioned and other purpose of the present invention, feature and advantage.
With reference to the following drawings preferred embodiment of the present invention is described, wherein:
Fig. 1 is an exemplary block diagram of implementing the embodiment of telecine unit of the present invention.
Fig. 2 (A) and (B) be to show the sensor 11 that adopts in the telecine unit shown in Figure 1 or the figure of 12 typical structures, wherein Fig. 2 (A) is the planimetric map that shows the sensor of watching from ccd video camera 9 (removable lateral plate window 7 an is removed) side 11, partial cross section, and Fig. 2 (B) is the figure that shows sensor 11 cross sections, partial cross section.
Fig. 3 is the decomposition diagram of the fixation side gate 6 that adopts in the telecine unit shown in Figure 1.
Fig. 4 is the amplification sectional view of the sheet window unit 5 that adopts in the telecine unit shown in Figure 1, partial cross section.
Fig. 5 is the block scheme of the typical structure of the film position detecting circuit 13 that adopts in the telecine unit shown in Figure 1.
Fig. 6 is the circuit diagram of the typical structure of the signaling conversion circuit 51 that adopts in the film position detecting circuit 13 shown in Figure 5 or 52.
Fig. 7 is the oscillogram of signal of the representative film position of film position detecting circuit shown in Figure 5 13 outputs.
Fig. 8 (A) to (G) is used to illustrate the figure of film position detecting circuit 13 working conditions shown in Figure 5.
Fig. 9 is the process flow diagram of control circuit 55 work of employing in the expression film position detecting circuit 13 shown in Figure 5.
Figure 10 (A) and (B) be the figure of the typical structure of the optical axis correcting unit 8 that adopts in the telecine unit shown in Figure 1.
Figure 11 (A) and (B) be to be used to illustrate normally interconnective figure how of cinefilm.
Yet, should be noted that following given description do not wish to be taken as a kind of restriction situation certainly.In other words, the device described in claims is not limited to exemplary embodiments described here.
Fig. 1 is the figure that shows the typical structure of the embodiment that implements telecine unit of the present invention.
For example, in this telecine unit, 35mm cinefilm 1 is walked about in the mode that intermittently moves.Take the image that is recorded in film 1 each frame with ccd video camera 9, image conversion is become TV signal.
Cinefilm 1 is directed to continuous film trasport sprocket wheel 2 from the chip-feeding wheel (not shown).The film perforation 10 of cinefilm 1 is meshed with tooth on continuous film trasport sprocket wheel 2 circumferential edge surface, thereby film 1 is fed forward continuously.The cinefilm 1 that is fed forward by connection film trasport sprocket wheel 2 offers intermittent film transport sprocket wheel 3 by a sheet window unit 5 (film guiding device).The gate unit comprises a fixation side gate 6 and a removable lateral plate window 7.
The film perforation 10 of cinefilm 1 also is meshed with sprocket on intermittent film transport sprocket wheel 3 circumferential edge surface, thereby film 1 is fed forward off and on.In other words, intermittent film transport sprocket wheel 3 once rotates a predetermined angular unit with the schedule time.Usually, intermittent film transport sprocket wheel 3 per seconds rotate 24 off and on changes.As a result, the cinefilm 1 picture record instantaneous time-out of a frame thereon on the precalculated position of sheet window unit 5, with this intermittence move mode be fed forward cinefilm 1.
The cinefilm 1 that is fed forward by intermittent film transport sprocket wheel 3 is in the state of film trasport sprocket wheel 4 engagements continuously and exports from telecine unit.
As mentioned above, sheet window unit 5 comprises fixation side gate 6 and removable lateral plate window 7.A part of surface of the fixation side gate 6 that is exposed to cinefilm 1 is cut down, and the light that makes light source 15 produce can shine on the cinefilm 1, and as shown in Figure 3, the back will be described.An opening 7A is bored on the part surface of the removable lateral plate window 7 by being exposed to cinefilm 1, and its size makes the light that passes cinefilm 1 can pass opening 7A to a certain extent greater than the frame size.Here, cinefilm 1 suspend off and on be exposed to removable lateral plate window 7 split shed 7A the precalculated position on, intermittent film transport sprocket wheel 3 with this intermittence move mode be fed forward cinefilm 1.
Removable lateral plate window 7 relative fixed lateral plate windows 6 are applied to predetermined pressure on the cinefilm 1.Predetermined pressure causes cinefilm 1 to be sandwiched in the middle of removable lateral plate window 7 and the fixation side gate 6.Yet, should be noted that and must be set at suitable value to predetermined pressure, make cinefilm 1 intermittently and smoothly to walk.
Being exposed on this relative side of cinefilm 1 surface, an optical gate 16 and light source 15 are set with fixation side gate 7.When the cinefilm 1 that intermittently advances was being walked about, optical gate 16 was in closed condition.In other words, only when cinefilm suspended, optical gate 16 was in open mode.As a result, only when film 1 is in time-out retaining state, the illumination that light source 15 produces is mapped on the cinefilm 1 by optical gate 16.The light that shines on the cinefilm 1 passes the image that is recorded on the cinefilm 1.The light that passes cinefilm 1 passes the opening 7A on the removable side door 7 then and enters ccd video camera 9 by optical axis correcting unit 8 (offset means for correcting).
On ccd video camera 9,, pass the light that is recorded in image on the cinefilm 1 and be converted into the output electric signal through photoelectric conversion process.
The sensing device of a plurality of detection cinefilms 1 position is set on sheet window unit 5 on the other hand.In this preferred embodiment, implement sensing device by sensor 11 and 12 (film position detecting device).At cinefilm 1 sensor 11 and 12 is aimed at, and placed cinefilm 1 on the position of the relative opening 7A symmetry in upstream side that opening 7A moves and downstream them.The signal of sensor 11 and 12 outputs all offers film position detecting circuit 13.Film position detecting circuit 13 utilizes a detection in sensor 11 and 12 signals of exporting to be in the position of halted state cinefilm 1 at least.
Say in detail, with pin-point accuracy the frame of cinefilm 1 is placed the precalculated position, this frame is exposed to opening 7A when the film of intermittent delivery suspends, and this is an ideal situation.Yet in fact, cinefilm 1 can cause image blurring in the formerly described certain situation vertically departing from this precalculated position on (film is walked about) and horizontal (film width).13 pairs of offsets out of position of film position detecting circuit detect, and this precalculated position is the physical slot that hypothesis cinefilm 1 suspends.Then, the signal of the representative offset amplitude that film position detecting circuit 13 is provided provides correction control circuit 14.
The signal that correction control circuit 14 produces according to film position detecting circuit 13, the optical axis correcting unit 8 of control between opening 7A and ccd video camera 9.In No. 5608474 United States Patent (USP) (on March 4th, 1997 issued, and transferred the application's assignee, and is incorporated by reference here), a kind of suitable optical axis correcting unit 8 is described.The optical axis L that 8 pairs of optical axis correcting units originate from light source 15 and pass the light of cinefilm 1 is proofreaied and correct, thereby reduces the caused image blurring degree of film 1 offset.As a result, can take the image that does not have fuzzy pictures by enough ccd video cameras 9.
The position that how to utilize sensor 11 and 12 to detect cinefilms 1 will be described below.As a kind of typical technology that detects cinefilm 1 position, present embodiment has adopted the electrostatic capacitance method based on electrostatic capacitance change in the capacitor.Yet, should be noted that and not wish this explanation as making a kind of limited case.In other words, the technology of detection cinefilm 1 position specifically is not confined to this electrostatic capacitance method.
Also to it should be noted that, because it is (here that it is incorporated by reference at the file that such as the U.S. Patent application serial number is 08/736604, it is to be submitted in the past by applicant, also not authorization) in the electrostatic capacitance method is made detailed description, in this manual this method has only been made brief description.
With reference to figure 2 (A) and 2 (B), begin to be described, Fig. 2 shows the typical structure of sensor 11.Because the structure of sensor 12 is identical with the structure of sensor 11, therefore sensor 11 is only described.Should be noted that Fig. 2 (A) is the planimetric map (removable lateral plate window 7 has been removed) of the sensor 11 seen from ccd video camera 9 these sides, and Fig. 2 (B) is the figure that shows sensor 11 cross sections.
Shown in Fig. 2 (B), megohmite insulant 27 is embedded in the fixation side gate 6, and longitudinal electrode 21 to 23 and transverse electrode 24 to 26 are embedded in the megohmite insulant 27.
Shown in Fig. 2 (A), electrode 21 to 23 is arranged on when film 1 moves forward off and on by sheet window unit 5 and in turn is exposed on the position of a series of film perforations 10 on the cinefilm 1.Each longitudinal electrode 21 to 23 has square shape, and its size is to a certain extent less than film perforation 10, and they are by vertically arranging.Electrode 21 and 22 constitutes the detecting electrode of a pair of detection cinefilm 1 lengthwise position.Electrode 21 and 22 surrounding space are filled megohmite insulant 27, are embedded into electrode 26 further around megohmite insulant as auxiliary electrode.Shown in Fig. 2 (A), cinefilm 1 suspends on physical slot that its hypothesis is suspended, and half is exposed to longitudinal electrode 21 right sides in the film perforation 10, and electrode 21 left sides half be exposed in the puncherless part of film 1 in film perforation 10 left sides.Meanwhile, half is exposed to longitudinal electrode 22 left sides in the same film perforation 10, and electrode 22 right sides half be exposed in the puncherless part of film 1 on film perforation 10 right sides.
Laterally (being width) electrode 24 and 25 respectively has rectangular shape and by transversely arranged. Transverse electrode 24 and 25 constitutes the detecting electrode of a pair of detection cinefilm 1 lateral attitude. Transverse electrode 24 and 25 surrounding space are filled megohmite insulant 27, are embedded into electrode 26 further around megohmite insulant as auxiliary electrode.Should be noted that transverse electrode 24 places on such position, promptly cinefilm 1 along the line on the gate part 5 off and on naturally in the walking electrode 24 inboard half be exposed to film 1.Transverse electrode 25 places on such position, promptly cinefilm 1 by gate part 5 walking in electrode 25 be exposed to the part edge of film 1.Cinefilm 1 suspends on physical slot that its hypothesis is suspended, electrode 24 inboard half be exposed to a bit in the film perforation 10, and half is exposed in the film 1 electrode 24 outsides half is exposed in the puncherless part of film 1 in the inboard of transverse electrode 25.
Being exposed on the removable lateral plate window 7 of a part of longitudinal electrode 21 to 23 and transverse electrode 24 to 26, the rectangle ground-electrode 28 that an area is sufficiently more than electrode 21 to 26 total areas is set.Ground-electrode 28 is electrodes that are connected with ground wire.In this configuration, ground-electrode 28 on the removable lateral plate window 7 and the electrode on the fixation side gate 6 21 to 26 form a planar capacitor electrode.Usually, the zone around film perforation 10 on the cinefilm 1 is by making such as the material of triacetate (TAC) and polyester (PET).In addition, the electrostatic capacitance of planar capacitor electrode usually is directly proportional with the specific inductive capacity of the folded megohmite insulant in the battery lead plate centre of forming capacitor.Because the relative dielectric constant (being the specific inductive capacity of megohmite insulant and the ratio of the specific inductive capacity of air) of megohmite insulant is relative higher, therefore the electrostatic capacitance of planar capacitor electrode, play folded material effects in the middle of two battery lead plates of capacitor the megohmite insulant of cinefilm 1 will be compared with the height of the air of sandwich material effect in addition such as film perforation 10.
Adopt the longitudinal electrode 21 and 22 and transverse electrode 24 and 25 of layout arrangement as mentioned above, if cinefilm 1 suspends exactly on the physical slot that its hypothesis is suspended, so, the electrostatic capacitance of vertical capacitor of being made up of ground-electrode 28 and longitudinal electrode 21 equates with the electrostatic capacitance of vertical capacitor of being made up of ground-electrode 28 and longitudinal electrode 22, and the electrostatic capacitance of the same transverse electric container of being made up of ground-electrode 28 and transverse electrode 25 of the electrostatic capacitance of the transverse electric container of being made up of ground-electrode 28 and transverse electrode 24 equates.As a result, the electrostatic capacitance of the vertical capacitor that will be made up of ground-electrode 28 and longitudinal electrode 21 compares with the electrostatic capacitance of vertical capacitor of being made up of ground-electrode 28 and longitudinal electrode 22, can determine the lengthwise position of cinefilm 1.Equally, the electrostatic capacitance of the transverse electric container that will be made up of ground-electrode 28 and transverse electrode 24 compares with the electrostatic capacitance of the transverse electric container of being made up of ground-electrode 28 and transverse electrode 25, can determine the lateral attitude of cinefilm 1.
Should be noted that in fact, only utilize in longitudinal electrode 21 or 22 a vertical capacitor of forming with ground-electrode 28 just can determine the lengthwise position of cinefilm 1.Yet, in this preferred embodiment, longitudinal electrode 21 and 22 are set, as a pair of electrode that is exposed to film perforation 10 forward and backward edges.It is the transverse edge of film perforation 10, for stability and the sensitivity that increases detection, in detecting the lengthwise position of cinefilm 1, utilized vertical capacitor that vertical capacitor that ground-electrode 28 and longitudinal electrode 21 form and ground-electrode 28 and longitudinal electrode 22 form the two.In the lateral attitude of detecting cinefilm 1, also adopt this design proposal, utilized ground-electrode 28 and the transverse electric container of transverse electrode 24 compositions and the transverse electric container of ground-electrode 28 and transverse electrode 25 compositions.
Should be noted that adopting vertical auxiliary electrode 23 to increase utilizes longitudinal electrode 21 and 22 to detect the accuracy of cinefilm 1 lengthwise position, utilizes transverse electrode 24 and 25 to detect the accuracy of cinefilm 1 lateral attitude and adopt horizontal auxiliary electrode 26 to increase.
Quite similar with sensor 11, sensor 12 also comprises the fore-and-aft plane electrode capacitor of being made up of ground-electrode 28 and longitudinal electrode 21 to 23 that is used to detect cinefilm 1 lengthwise position and is used to detect the transverse plane electrode capacitor of being made up of ground-electrode 28 and transverse electrode 24 to 26 of cinefilm 1 lateral attitude.Though for each sensor 11 and 12, one group of longitudinal electrode and transverse electrode are enough,, each sensor 11 and 12 can comprise a plurality of such electrode groups.In more detail, can increase the number of the electrode pair that comprises longitudinal electrode 21 and 22.In this case, represent the output level of cinefilm 1 lengthwise position testing result to be improved, adopt the mean value of testing result to substitute the testing result that only adopts a pair of longitudinal electrode output, thereby can improve the accuracy of detection.Equally, can increase the number of the electrode pair that comprises transverse electrode 24 and 25.In this case, represent the output level of cinefilm 1 lateral attitude testing result to be improved, adopt the mean value of testing result to substitute the testing result that only adopts a pair of transverse electrode output, thereby can improve the accuracy of detection.
Fig. 3 is the skeleton view of fixation side gate 6.
In the present embodiment, sensor 11 and 12 is installed in cinefilm 1 respectively in the position in upstream side that screening zone 31 moves and downstream, promptly in the front and back position of screening zone 31 longitudinally.Screening zone 31 is zones on the fixation side gate 6, and it is exposed among the opening 7A on the removable lateral plate window 7.Sensor 11 has the electrode of a pair of detection cinefilm 1 lengthwise position, and it comprises longitudinal electrode 21 and 22, is positioned on the horizontal side of fixation side gate 6.Because on the horizontal opposite side of fixation side gate 6 such pair of electrodes is arranged also, therefore, sensor 11 is two pairs of longitudinal electrodes altogether.For the transverse electrode 24 and 25 that detects cinefilm 1 lateral attitude, longitudinally on the side, sensor 11 has a pair of such electrode at fixation side gate 6.Because longitudinally on the opposite side, sensor 11 also has a pair of such electrode at fixation side gate 6, therefore, sensor 11 always has two pairs of transverse electrodes.The configuration of the vertical and horizontal electrode of sensor 12 is identical with sensor 11.
Fig. 4 is the figure that shows sheet window unit 5 cross sections shown in Figure 1.
The position of the upstream side that moves relative to sensor 11 at cinefilm 1 promptly vertically is positioned on the position before the sensor 11 a film compactor 41 is set.By film compactor 41 relative fixed lateral plate windows 6 being compressed downwards attached to the spring 41A on the removable lateral plate window 7.Equally, cinefilm 1 is relative to the position in the downstream that sensor 11 moves, and promptly vertically is positioned on the position behind the sensor 11 a film compactor 42 is set.By film compactor 42 relative fixed lateral plate windows 6 being compressed downwards attached to the spring 42A on the removable lateral plate window 7.Cinefilm 1 is sandwiched between fixation side gate 6 and compactor 41 and 42, and it is loosening can not produce film.Should be noted that with spring 41A and the such power of 42A film compactor 41 and 42 is compressed downwards, make and to pass gate part 5 greater than the cinefilm part of the contact of film general thickness, and do not have any obstacle such as thickness.Film compactor 41 and 42 and the configuration of spring 41A and 42A also be used for sensor 12.
Spring 28A also compresses ground-electrode 28 relative fixed lateral plate windows 6 downwards.As shown in Figure 4, the left and right horizontal projection 45 that is set at respectively on removable lateral plate window 7 cut-out 44 of the horizontal projection 43 relative with being exposed to fixation side gate 6 surface of the ground-electrode 28 surperficial left and right sides blocks.As a result, between ground-electrode 28 and fixation side gate 6, produce the gap.The gap thickness thickness than cinefilm 1 at least is big.The thickness in gap is about 200 microns usually, and the one-tenth-value thickness 1/10 of cinefilm 1 is between 120 to 160 microns.Should be noted that with compactor 41 and 42 quite similarly, ground-electrode 28 is compressed downwards, make and to pass gate part 5 greater than the cinefilm part of the contact of other film general thickness, without any obstacle such as thickness with the such power of spring 28A.
Fig. 5 is the block scheme of the typical structure of film position detecting circuit 13 shown in Figure 1.
As shown in the figure, the signal of sensor 11 and 12 outputs offers signaling conversion circuit 51 and 52 respectively.Signaling conversion circuit 51 becomes voltage to the conversion of signals of the sensor 11 and representative cinefilm 1 testing result of 12 outputs respectively with 52.The voltage of signaling conversion circuit 51 outputs offers the terminal T1 of film circuit for detecting connecting point 53, value averaging circuit 56 and switch 57.Equally, the voltage of signaling conversion circuit 52 outputs offers the terminal T2 of film circuit for detecting connecting point 54, value averaging circuit 56 and switch 57.
Film circuit for detecting connecting point 53 judges according to the voltage of signaling conversion circuit 51 outputs whether the contact of cinefilm 1 is passing through sensor 11, and result of determination is offered control circuit 55.Equally, film circuit for detecting connecting point 54 judges according to the voltage of signaling conversion circuit 52 outputs whether the contact of cinefilm 1 is passing through sensor 12, and result of determination is offered control circuit 55.
The data of the cinefilm 1 picture number of having passed by from the result of determination of film circuit for detecting connecting point 53 and 54, expression and expression the film 1 intermittently data of moving direction (being that film is from left to right forward walking or oppositely walking from right to left as shown in fig. 1 as shown in fig. 1) are input to control circuit 55.Utilize this information, control circuit 55 gauge tap 57.It should be noted that, the picture number of the cinefilm 1 of having passed by and relevant the film 1 intermittently information of moving direction are to be produced by not shown circuit, usually the anglec of rotation of the intermittent film transport sprocket wheel 3 that adopts from all telecine units as shown in Figure 1 and the information of sense of rotation.
The mean value of the signal of value averaging circuit 56 signal calculated change-over circuits 51 and 52 outputs also offers this mean value the terminal T3 of switch 57.According to the control signal of control circuit 55 outputs, switch 57 is connected to lead-out terminal terminal T1, T2, T3 or T4 thus.Should be noted that terminal T4 is not connected with any object, therefore be in so-called off-state.
During cinefilm 1 intermittently moves, switch 58 corresponding disconnections when film 1 is mobile, and when film 1 stops switch connection.When film moved, the combination of switch 58 and capacitor 59 played sample-and-hold circuit.Only when cinefilm 1 suspended, switch 57 was just delivered to an end of capacitor 59 and noninvert (+) input end of operational amplifier 60 to signal.The other end ground connection of capacitor 59.The output terminal of operational amplifier 60 is connected to paraphase (-) input end.In the sort circuit configuration, operational amplifier 60 is exported a signal after signal being offered noninvert (+) input end of operational amplifier 60, promptly the film position signalling is represented the current location of cinefilm 1 when film 1 suspends, when film is mobile once more, once suspend the position before representing film.
Fig. 6 is the circuit diagram that shows the typical structure of signaling conversion circuit 51 shown in Figure 5.Because the structure of signaling conversion circuit 52 is identical with circuit 51, therefore, only illustrates and illustrate the latter's structure.Should be noted that Fig. 6 only illustrates a part that the cinefilm 1 lengthwise position testing result of sensor 11 outputs is converted to voltage, is sensor 12 in the situation of signaling conversion circuit 52.Also can change with circuit same as shown in Figure 6 the testing result of the lateral attitude of cinefilm 1.
As shown in the figure, the AC voltage that AC voltage generator 71 produces offers noninvert (+) input end of operational amplifier 83, and its paraphase (-) input end is by resistance 84 ground connection.One of variohm 85 is connected to the tie point between paraphase (-) input end of resistance 84 and operational amplifier 83, and the other end of resistor 85 is connected to the output terminal of amplifier 83.In sort circuit is arranged, the amplification of the AC voltage that operational amplifier 83 provides AC voltage generator 71 signal output to noninvert (+) input end of amplifier 83.
One of resistance 86 is connected to the output terminal of operational amplifier 83, and the other end of resistance 86 be connected to electric capacity 87 an end.The other end ground connection of electric capacity 87.Tie point between resistance 86 and the electric capacity 87 is connected to electrode 23, and it is as auxiliary electrode.Therefore, as mentioned above, predetermined AC voltage is applied on the electrode 23.It is in order to improve the accuracy of cinefilm 1 position probing that predetermined AC voltage is applied on the electrode 23.
Should be noted that tie point is connected to the electrode 26 among Fig. 2 between resistance 86 and the electric capacity 87 in the situation of the signaling conversion circuit of the equivalence that cinefilm 1 lateral attitude testing result is changed, it is as auxiliary electrode.
The AC voltage that AC voltage generator 71 produces also offers noninvert (+) input end of operational amplifier 72, and its paraphase (-) input end and output terminal interconnect.Paraphase (-) input end of operational amplifier 72 and the tie point between the output terminal are connected to an end of resistance 73 and 74.The resistance 73 and 74 the other end are connected to electrode 21 and 22 respectively.
Tie point between resistance 73 and the electrode 21 is connected to noninvert (+) input end of operational amplifier 75, and its paraphase (-) input end and output terminal interconnect.The output terminal of operational amplifier 75 also is connected to an end of resistance 78, and the other end of resistance 78 is connected to noninvert (+) input end of operational amplifier 81.Tie point between noninvert (+) input end of resistance 78 other ends and operational amplifier 81 is connected to an end of resistance 80, the other end ground connection of resistance 80.
Tie point between resistance 74 and the electrode 22 is connected to noninvert (+) input end of operational amplifier 76.Its paraphase (-) input end and output terminal interconnect.The output terminal of operational amplifier 76 also is connected to an end of resistance 77, and the other end of resistance 77 is connected to paraphase (-) input end of operational amplifier 81.Tie point between paraphase (-) input end of the other end of resistance 77 and operational amplifier 81 is connected to an end of resistance 79, and the other end of resistance 79 is connected to the output terminal of operational amplifier 81.
The resistance value of resistance 77 to 80 equates mutually usually.Therefore, resistance 77 to 80 and operational amplifier 81 form the subtracter of difference between a calculation operations amplifier 75 and 76 outputs.
Should be noted that resistance 73 and 74 is not to be connected to electrode 21 and 22 in the situation of the equivalent signal conversion portion that cinefilm 1 lateral attitude testing result is changed, but be connected to the electrode 24 and 25 of the sensor 11 shown in Fig. 2 or 12 respectively.
The output terminal of operational amplifier 81 is connected to signal deteching circuit 82, and the signal of pair amplifier 81 outputs detects.Testing result is converted to output voltage, represent the testing result of cinefilm 1 lengthwise position.
The voltage of supposing operational amplifier 72 outputs in the signaling conversion circuit 51 with above-mentioned structure is e 0In this case, appear at the voltage e on the tie point between resistance 73 and the electrode 21 1And appear at the voltage e on the tie point between resistance 74 and the electrode 22 2Can represent with following equation (1) and (2):
e? 1=e 0／(1+jωC 1R 1) (1)
e? 2=e 0／(1+jωC 2R 2) (2)
In the formula, j 2=-1, symbol " w " is the angular frequency of the AC voltage of AC voltage source 71 generations.C 1Be the electrostatic capacitance of the capacitor of formation between electrode 21 and the ground-electrode 28, C 2Be the electrostatic capacitance of the capacitor of formation between electrode 22 and the ground-electrode 28, R 1And R 2Be respectively the resistance of resistor 73 and 74.
The electrostatic capacitance C of the capacitor that forms between electrode 21 and the ground-electrode 28 1Gap between electrode 21 and ground-electrode 28 is full of air, reaches minimum value when promptly entire electrode 21 is exposed in the film perforation 10, reaches maximal value beyond the gap between electrode 21 and the ground-electrode 28 is full of film perforation 10 during the megohmite insulant of part cinefilm 1.Equally, the electrostatic capacitance C of the capacitor that forms between electrode 22 and the ground-electrode 28 2Gap between electrode 22 and ground-electrode 28 is full of air, reaches minimum value when promptly entire electrode 22 is exposed in the film perforation 10, reaches maximal value beyond the gap between electrode 22 and the ground-electrode 28 is full of film perforation 10 during the megohmite insulant of part cinefilm 1.
Suppose that C is the minimum electrostatic capacitance of the capacitor of formation between electrode 21 and the ground-electrode 28, the electrostatic capacitance when promptly the gap between electrode 21 and the ground-electrode 28 is full of air.Suppose C 1It is variation when the gap between electrode 21 and the ground-electrode 28 is all or part of when being full of the megohmite insulant of part cinefilm 1 beyond the film perforation 10 observed electrostatic capacitance.Therefore, all or part of film perforation 10 megohmite insulant of part cinefilm 1 in addition, the electrostatic capacitance C of the capacitor that forms between electrode 21 and the ground-electrode 28 of being full of in the gap between electrode 21 and the ground-electrode 28 1Represent by following equation (3):
C 1=C+ΔC 1 (3)
In the formula: C＞＞Δ C 1
Equally, C is the minimum electrostatic capacitance of the capacitor of formation between electrode 22 and the ground-electrode 28, the electrostatic capacitance when promptly the gap between electrode 22 and the ground-electrode 28 is full of air.Suppose C 2It is variation when the gap between electrode 22 and the ground-electrode 28 is all or part of when being full of the megohmite insulant of part cinefilm 1 beyond the film perforation 10 observed electrostatic capacitance.Therefore, all or part of film perforation 10 megohmite insulant of part cinefilm 1 in addition, the electrostatic capacitance C of the capacitor that forms between electrode 22 and the ground-electrode 28 of being full of in the gap between electrode 22 and the ground-electrode 28 2Represent by following equation (4):
C 2=C+ΔC 2 (4)
In the formula: C＞＞Δ C 2
Suppose operational amplifier 75 output e 1, voltage is offered its non-inverted output terminals, operational amplifier 76 output e 2, voltage is offered its non-inverted output terminals, and R 1=R 2=R.The voltage e that appears on operational amplifier 79 output terminals is e 1With e 2Poor, be expressed from the next: e=e 1-e 2
With the e in the alternative respectively following formula of the right-hand side expression of equation (1) and equation (2) 1And e 2, obtain following formula:
e=e 0／(1+jωC 1R 1)-e 0／(1+jωC 2R 2)
Therefore, with the C in the alternative following formula of the right-hand side expression of equation (3) 1, with the C in the alternative following formula of the right-hand side expression of equation (4) 2, obtain following formula: e=e 0/ [1+j ω (C+ Δ C 1) R 1]-e 0/ [1+j ω (C+ Δ C 2) R 2]=j ω (Δ C 2-Δ C 1) e 0/ (1+j ω CR) 2(5)
If cinefilm 1 suspends on the physical slot that its hypothesis is vertically suspended, electrode 21 and 22 mode is as described above located, Δ C 1Equal Δ C 2Thereby voltage e is 0.
As mentioned above, 4 film perforations 10 are set for each frame of cinefilm 1, film perforation 10 has right side, left side, upstream side, downstream.Therefore, when cinefilm 1 was intermittently walked about, the operational amplifier 81 that plays the subtracter effect was by signal deteching circuit 82 outputs one switching signal, and its waveform as shown in Figure 7.As shown in the figure, when cinefilm 1 was being walked about, signal deteching circuit 82 outputs had the sine wave in 4 cycles.The signal sets of signal deteching circuit 82 outputs was showing that film 1 is on the level that suspends the position when on the other hand, cinefilm 1 suspended.In the present embodiment, when cinefilm 1 suspended on vertical physical slot that its hypothesis is suspended, as mentioned above, switching signal was 0V.
Up to the present given description also is correct to the detection of cinefilm 1 lateral attitude.
The switching signal that produces when basically, film position detecting circuit 13 shown in Figure 5 suspends cinefilm 1 offers the correction control circuit 14 that adopts in the telecine unit shown in Figure 1.Then, optical axis correcting unit 8 is proofreaied and correct optical axis according to the control signal that correction control circuit 14 produces.
Then, with reference to the workflow diagram shown in the figure 8 (A) to (G), the working condition of the film position detecting circuit 13 shown in Fig. 5 is described.
For example, suppose that now cinefilm 1 just walking about at forward, promptly shown in Fig. 8 (A) from sensor 11 to sensor 12, a contact is arranged in the cinefilm, its contact pin band is shorter than the longitudinal length that drops on this frame of contact place.The width of supposing the contact pin band in addition equates with the lateral dimension of cinefilm 1.Shown in Fig. 8 (A), sensor 11 and 12 is arranged on each and separates on the position of half frame distance with screening zone 31.As shown in Figure 3, screening zone 31 is parts that fixation side gate 6 is exposed to removable lateral plate window 7 upper shed 7A.Therefore, approximate the width of 2 vertical frames to the distance of sensor 12 at the edge of screening zone 31 opposite sides at the edge of screening zone 31 1 sides from sensor 11.In addition, sensor 11 and 12 longitudinal length respectively approximate the length of 1 frame.
In this case, before the contact of cinefilm 1 passes sensor 11, therefore, and also before contact passes sensor 12, the switching signal s among Fig. 8 (B) that the signaling conversion circuit 51 that is connected with sensor 11 produces 1Has waveform same as shown in Figure 7.Equally, the switching signal s among Fig. 8 (C) that the signaling conversion circuit 52 that is connected with sensor 12 produces 2Also has waveform same as shown in Figure 7.Should be noted that Fig. 8 (B) and 8 (C) illustrate respectively in simple and clear mode comprises waveform s 1And s 2Envelope.
In this case, control circuit 55 gauge tap 57 are selected terminal T3 according to shown in Fig. 8 (G).As previously mentioned, value averaging circuit 53 offers terminal T3 to signal.The signal of value averaging circuit 53 outputs is switching signal s that cinefilm 1 is in signaling conversion circuit 51 outputs in the halted state 1Switching signal s with signaling conversion circuit 52 outputs 2Mean value.Therefore, before the contact of cinefilm 1 passes sensor 11, output switching signal s 1With s 2Mean value, as the signal of optical axis correcting unit that optical axis is proofreaied and correct 8 as representative film 1 position of benchmark.
Then, when the contact proximity transducer 11 of cinefilm 1, switching signal s 1Become the waveform of so-called disordered state (or abnormality) from the described waveform of Fig. 7.Say that in detail because the thickness of cinefilm 1 contact is described as earlier in respect of figures 4 greater than the thickness of other parts, the contact of close sensor 11 has improved the ground-electrode 28 that is compressed by spring 28A downwards.As a result, increased the distance that comprises as between two battery lead plates of capacitor of the ground-electrode 28 of a battery lead plate.In addition, the more close sensor 11 of the contact of cinefilm 1, the most gaps between the battery lead plate are full of air, have reduced the electrostatic capacitance of capacitor.As a result, its switching signal s 1Amplitude be reduced to the level of the common value that obtains when passing sensor 11 less than film perforation 10.
After this, when cinefilm further goes ahead, comprise as the gap of the capacitor of the ground-electrode 28 of a battery lead plate occupied by the contact of film 1, in other words, when the gap was comprised that the dielectric material of cinefilm 1 and superimposed contact pin band on film 1 occupies, the electrostatic capacitance of capacitor increased.As a result, switching signal s 1Amplitude also increase to the level of the common value that obtains when passing sensor 11 greater than film perforation 10.
As mentioned above, the time that begins to leave to contact sensor 11 near time of sensor 11 from the contact of cinefilm 1 finishes, and in this cycle, should have the switching signal s of fixed value naturally 1Amplitude shown in Fig. 8 (B), reduce and increase.Film circuit for detecting connecting point 53 offers the switching signal s of film circuit for detecting connecting point 53 according to signaling conversion circuit 51 1The variation of amplitude judges that whether the contact of determining cinefilm 1 is by sensor 11.
Film circuit for detecting connecting point 53 offers control circuit 55 to the result of determination shown in Fig. 8 (D).Should be noted that O shown in Fig. 8 (D) and X mark are illustrated respectively in the contact that does not have and exist cinefilm 1 on the sensor 11.
Receive from film circuit for detecting connecting point 53 at control circuit 55 and to be illustrated in the moment that there is the result of determination of cinefilm 1 contact in sensor 11, shown in Fig. 8 (F), begin the operation that the frame number of intermittent delivery is at this moment counted.Shown in Fig. 8 (G), control circuit 55 further gauge tap 57 are selected terminal T2.As mentioned above, the switching signal s of signaling conversion circuit 52 outputs 2Offer terminal T2.Therefore, in this case, output switching signal s 2Represent in optical axis correcting unit 8, being used as of cinefilm 1 position that optical axis is carried out the signal of correction reference and exports.
After this, control circuit 55 maintains switch 57 in the state of selecting terminal T2, till the frame counting of selecting terminal T2 to fail off and on from switch 57 becomes 2 shown in Fig. 8 (G).As a result, in this case,, only utilize the signal of sensor 12 outputs, need not to utilize the abnormal signal of sensor 11 outputs that optical axis is proofreaied and correct for from detecting two frames of film contact.
When the frame counting of selecting terminal T2 to fail off and on from switch 57 becomes 3, control circuit 55 recognizes, by sensor 11 and arrive sensor 12, this segment distance equals the longitudinal length sum of distance and contact between sensor installation 11 and 12 positions to the contact of cinefilm 1 behind the segment distance of passing by.
Film contact pick-up unit 54 is quite similar with film circuit for detecting connecting point 53, offers the switching signal s of film circuit for detecting connecting point 54 according to signaling conversion circuit 52 2The variation of amplitude judges that whether the contact of determining cinefilm 1 is by sensor 12.
Say in detail then, when the frame counting of selecting terminal T2 to fail off and on from switch 57 becomes 3, film circuit for detecting connecting point 53 does not exist the result of determination of film contact (shown in Fig. 8 (D)) to offer control circuit 55 being illustrated on the sensor 11, and film circuit for detecting connecting point 54 is when being illustrated in the result of determination that has film contact (shown in Fig. 8 (E)) on the sensor 12 and offering control circuit 55, shown in Fig. 8 (G), control circuit 55 gauge tap 57 are selected terminal T1.Quite similar with Fig. 8 (D), O shown in Fig. 8 (E) and X mark represent not exist and exist on the sensor 12 contact of cinefilm 1 respectively.As mentioned above, the switching signal s of signaling conversion circuit 51 outputs 1Offer terminal T1.Therefore, in this case, output switching signal s 1Represent in optical axis correcting unit 8, being used as the signal of optical axis correction benchmark of cinefilm 1 position and export.
After this, control circuit 55 maintains switch 57 in the state of selecting terminal T1, until the frame counting of selecting terminal T2 to fail off and on from switch 57 become equal 5 shown in Fig. 8 (G) till.As a result, in this case, only utilize the signal of sensor 11 outputs, need not to utilize the abnormal signal of sensor 12 outputs that optical axis is proofreaied and correct.
Then, when the frame counting of selecting terminal T2 to fail off and on from switch 57 becomes when equaling 6, control circuit 55 recognizes, and by sensor 12, this segment distance equals the longitudinal length of contact to the contact of cinefilm 1 behind the segment distance of passing by.
Therefore, when the frame counting of selecting terminal T2 to fail off and on from switch 57 becomes when equaling 6, film circuit for detecting connecting point 53 does not exist the result of determination of film contact to offer control circuit 55 on the expression sensor 11 shown in Fig. 8 (D), equally, film circuit for detecting connecting point 54 does not exist the result of determination of film contact to offer control circuit 55 on the expression sensor 12 shown in Fig. 8 (E).
According to these result of determination that receive, control circuit 55 gauge tap 57 are selected terminal T3, shown in Fig. 8 (G).As mentioned above, the switching signal s of signaling conversion circuit 51 outputs 1Switching signal s with signaling conversion circuit 52 outputs 2Mean value offer terminal T3.Therefore, in this case, mean value is exported as representing being used as the signal of optical axis correction benchmark in optical axis correcting unit 8 of cinefilm 1 position.
It should be noted that, if the sensor 11 and 12 that provides in the description above inciting somebody to action exchanges mutually, signaling conversion circuit 51 and 52 exchanges mutually, film circuit for detecting connecting point 53 and 54 exchanges mutually, and terminal T1 and T2 exchange mutually, and be so, reverse at cinefilm 1, promptly the situation that 11 direction intermittently moves from sensor 12 to sensor, above description also will remain very.
Then, with reference to process flow diagram shown in Figure 9, the working condition of control circuit 55 shown in Fig. 5 is described.
As shown in the figure, process flow diagram is from step S1, and in this step, control circuit 55 waits for that cinefilm 1 moves the distance that is equivalent to a frame, promptly waits for switching signal s 1And s 2All become unusual.In other words, at step S1, whether control circuit 55 judges, received to show that there is the result of determination of cinefilm 1 contact in sensor 11 and has received show that there is the result of determination of cinefilm 1 contact in sensor 12 from film circuit for detecting connecting point 54 from film circuit for detecting connecting point 53.If the judgement conclusion that step S1 carries out shows switching signal s 1And s 2All be normal, perhaps switching signal s 1Or s 2In have one to be normal, so, workflow enters step S2, whether only judges switching signal s 1Be unusual.If the judgement conclusion that step S2 carries out shows switching signal s 1Be normal, so, workflow proceeds to step S3, and only whether judgement switching signal s 2Be unusual.
If the judgement conclusion that step S3 carries out shows switching signal s 2Be normal, if i.e. switching signal s 1And s 2All be normal, so, workflow proceeds to step S4, and in this step, control circuit 55 gauge tap 57 are selected terminal T3.As a result, in this case, adopt switching signal s 1And s 2Mean value as the benchmark of optical axis correction.
If the judgement conclusion that step S2 carries out shows switching signal s is only arranged 1Be unusual, show the film contact by sensor 11, so, workflow enters into step S5, and in this step, control circuit 55 gauge tap 57 are selected terminal T2.As a result, in this case, the switching signal s of sensor 12 is only arranged 2Benchmark as optical axis correction.
Then, workflow proceeds to step S6, and in this step, control circuit 55 waits for that cinefilm 1 moves the distance that is equivalent to a frame, and judges whether cinefilm 1 is still further being carried by forward off and on.If the judgement conclusion that step S6 carries out shows cinefilm 1 not according to forward, during promptly by reverse intermittent delivery, so, workflow turns back to step S1.On the other hand, if the judgement conclusion that step S6 carries out shows that so, workflow proceeded to step S7 when cinefilm was still by the forward intermittent delivery, judge switching signal s 2Whether unusual.
If the judgement conclusion that step S7 carries out shows switching signal s 2Unusually, so, workflow turns back to step S1.On the other hand, if the judgement conclusion that step S7 carries out shows switching signal s 2Not unusual, so, workflow proceeds to step S8, judges whether the frame counting that switch 57 is selected to have carried since the terminal T2 in step S5 is equal to or less than 2.If the judgement conclusion of step S8 shows the frame counting that switch 57 is selected to have carried since the terminal T2 in step S5 and is equal to or less than 2 that so, workflow turns back to step S5.In other words, if switch 57 is selected to have continued press forward since the terminal T2 and carried frame in step S5 always, the frame of having carried since the switch 57 selection terminal T2 in step S5 is counted and is equal to or less than 2 and switching signal s 2Not unusual, so, only adopt switching signal s 2Benchmark as optical axis correction.In this case, the film contact is still below sensor 11.
On the other hand, if the judgement conclusion of step S8 shows, the frame counting of having carried since the switch 57 selection terminal T2 in step S5 is not equal to 2 and also is not less than 2, if promptly the frame counting that switch 57 is selected to have carried since the terminal T2 in step S5 has reached 3, so, workflow enters step S9, judges switching signal s 1Whether unusual.If the judgement conclusion of step S9 shows switching signal s 1Unusually, so, workflow turns back to step S1.If the judgement conclusion of step S9 shows switching signal s 1Not unusual, expression film contact is by sensor 11, and so, workflow proceeds to step S10, and in this step, control circuit 55 gauge tap 57 are selected terminal T1.As a result, in this case, only adopt the switching signal s of sensor 11 1Benchmark as optical axis correction.In this case, the film contact is by sensor 11, or below the sensor 12 or will be below sensor 12.
Then, workflow proceeds to step S11, and in this step, control circuit 55 waits for that cinefilm 1 moves the distance that is equivalent to a frame, and judges whether cinefilm 1 is still further being carried by forward off and on.If it has not been by forward that the judgement conclusion of step S11 shows cinefilm 1, during promptly by reverse intermittent delivery, so, workflow turns back to step S1.On the other hand, if when the judgement conclusion of step S11 shows cinefilm still by the forward intermittent delivery, so, workflow proceeds to step S12, judges whether the frame counting that switch 57 is selected to have carried since the terminal T1 in step S10 is equal to or less than 3.If the judgement conclusion of step S12 shows the frame counting that switch 57 is selected to have carried since the terminal T1 in step S10 and is equal to or less than 3 that so, workflow turns back to step S9.In other words, if switch 57 is selected to have continued to press forward conveying frame since the terminal T1 in step S10 always, the frame counting that switch 57 is selected to have carried since the terminal T1 in step S10 is equal to or less than 3, and switching signal s 1Not unusual, so, only adopt switching signal s 1Benchmark as optical axis correction.
On the other hand, if the judgement conclusion of step S12 shows that the frame counting of having carried since the switch 57 selection terminal T1 both had been not equal to 3 and also has been not less than 3 in step S10, if promptly the frame counting that switch 57 is selected to have carried since the terminal T1 in step S10 has reached 4, so, workflow turns back to step S1.
If the judgement conclusion of step S3 shows only switching signal s 2Unusually, so, workflow proceeds to step S13, and in this step, control circuit 55 gauge tap 57 are selected terminal T1.As a result, in this case, the film contact is positioned at sensor 12 belows and only adopts the switching signal s of sensor 11 1Benchmark as optical axis correction.
Up to the present, film forward projection operation only has been discussed.In some cases, film is oppositely walking possibly.Behind step S13, workflow proceeds to step S14, and in this step, control circuit 55 waits for that cinefilms 1 move the distance that is equivalent to a frame and judge whether further reverse film trasport off and on of cinefilm 1.If the judgement conclusion of step S14 shows that not according to oppositely but carry cinefilm 1 off and on by forward, so, workflow turns back to step S1.On the other hand, if the judgement conclusion of step S14 shows that always by oppositely carrying cinefilm 1 off and on, so, workflow proceeds to step S15, judge switching signal s 1Whether unusual.
If the judgement conclusion of step S15 shows switching signal s 1Unusually, so, workflow turns back to step S1.If the judgement conclusion of step S15 shows switching signal s 1Not unusual, so, workflow proceeds to step S16, judges whether the frame counting that switch 57 is selected to have carried since the terminal T1 in step S13 is equal to or less than 2.Negate that so, workflow turns back to step S13 if the judgement conclusion of step S16 shows.In other words, if switch 57 has been selected since the terminal T1 always at reverse intermittent film transport in step S13, the frame counting that switch 57 is selected to have carried since the terminal T1 in step S13 is equal to or less than 2, and switching signal s 1Not unusual, so, only adopt switching signal s 1Benchmark as optical axis correction.
On the other hand, if the judgement conclusion of step S16 shows that the frame counting of having carried since the switch 57 selection terminal T1 both had been not equal to 2 and also has been not less than 2 in step S13, promptly the frame counting that switch 57 is selected to have carried since the terminal T1 in step S13 has reached 3, so, workflow proceeds to step S17, judges switching signal s 1Whether unusual.If the judgement conclusion of step S17 shows switching signal s 2Unusually, so, workflow turns back to step S1.On the other hand, if the judgement conclusion of step S17 shows switching signal s 2Not unusual, so, workflow proceeds to step S18, and in this step, control circuit 55 gauge tap 57 are selected terminal T2.As a result, in this case, only adopt switching signal s 2Benchmark as optical axis correction.
Then, workflow proceeds to step S19, and in this step, control circuit 55 waits for that cinefilm 1 moves the distance that is equivalent to a frame, and judges whether cinefilm 1 is still further pressing oppositely conveying off and on.If the judgement conclusion of step S19 negates that when promptly cinefilm 1 had been pressed the forward film trasport, so, workflow turned back to step S1.On the other hand, if the judgement conclusion of step S19 shows always by oppositely carrying cinefilm 1 off and on, so, workflow proceeds to step S20, judges in this step whether the frame counting that switch 57 is selected to have carried since the terminal T2 in step S18 is equal to or less than 3.If the judgement conclusion of step S20 shows the frame counting that switch 57 is selected to have carried since the terminal T2 in step S18 and is equal to or less than 3 that so, workflow turns back to step S17.In other words, if switch 57 is selected to have continued by oppositely carrying frame since the terminal T2 in step S18 always, the frame counting that switch 57 is selected to have carried since the terminal T2 in step S18 is equal to or less than 3, and switching signal s 2Not unusual, so, only adopt switching signal s 2Benchmark as optical axis correction.
If the judgement conclusion of step S20 shows that the frame counting of having carried since the switch 57 selection terminal T2 both had been not equal to 3 and also has been not less than 3 in step S18, promptly the frame counting that switch 57 is selected to have carried since the terminal T2 in step S18 has reached 4, so, workflow turns back to step S1.
As mentioned above, consider the direction that cinefilm 1 intermittently moves and move during the frame number carried, control circuit 55 is judged switching signal s 1Or s 2Be that normal or unusual and further gauge tap 57 is selected switching signal s 1Or s 2In any one or switching signal s 1Or s 2Mean value as the benchmark of optical axis correction.As a result,, and between sensor 11 and 12, switch cinefilm 1 by chance intermittently during moving direction, can both proofread and correct optical axis with pin-point accuracy at film 1 contact not only at cinefilm 1 forward with during oppositely intermittently moving.
Should be noted that if the judgement conclusion of initial step S1 shows switching signal s in process flow diagram shown in Figure 9 1And s 2All be unusual, if judge that promptly conclusion shows, for example cinefilm 1 exists 2 or more a plurality of contact, do not separate sufficiently long distance each other, because the film surface produced moderate finite deformation around damage made contact, perhaps there are other various abnormal problems, be clipped between the fixation side gate 6 and removable lateral plate window 7 of sheet window unit 5, so, workflow proceeds to step S21, in this step, control circuit 55 gauge tap 57 before turning back to step S1 to wait for the next frame of conveying is selected terminal T4.
But there is not signal to offer terminal T4 in this case, in the preceding once correction that optical axis is carried out, accumulated electric charge in the capacitor 59 that in film position detecting circuit 13 shown in Figure 5, adopts, produced the voltage of representative by switch 57 output signals.This voltage is offered the non-inverting input terminal of operational amplifier 60.Therefore, when finding switching signal s 1And s 2When all unusual,, once more optical axis is proofreaied and correct according to the signal of representative cinefilm 1 position of in preceding once correction, using.
Should be noted that above-mentioned is independently to carry out according to the signal of representing cinefilm 1 lengthwise position to optical axis process of proofreading and correct and the process of optical axis being proofreaied and correct according to the signal of representing cinefilm 1 lateral attitude.Be also noted that the detection of film contact is similar to foregoing circuit with compensating circuit, can use with the circuit of optical axis being proofreaied and correct according to the signal of representing cinefilm 1 lateral attitude.
Figure 10 (A) and 10 (B) are the figure that shows optical axis correcting unit 8 typical structures that adopt in the telecine unit shown in Figure 1.More particularly, Figure 10 (A) is the skeleton view of optical axis correcting unit 8.And Figure 10 (B) is its sectional view, promptly passes the plane surface of motor 162 turning axles shown in Figure 10 (A) perpendicular to the flat board 130 shown in Figure 10 (A).Should be noted that for clarity sake not shown turning axle itself in Figure 10 (A).
Dull and stereotyped 130 and dull and stereotyped 131 are normally made by the glass material with identical refractive index, and they are mutual stacked and be positioned near vertical on the direction of the optical axis of the light that passes sheet window unit 5.Should be noted that in this configuration dull and stereotyped 130 and dull and stereotyped 131 lay respectively at a side that is exposed to ccd video camera 5 and a side that is exposed to sheet window unit 5.
The right and left dull and stereotyped 130 is provided with two axostylus axostyles 132 and 133, be in line with the turning axle of motor 160, the rotating shaft of for clarity sake not shown motor 160, motor 160 makes the dull and stereotyped 130 sense of rotation rotations by arrow c indication shown in Figure 10 (A), gets axostylus axostyle 132 and 133 as turning axle.
Equally, two axostylus axostyles 134 and 135 are set, are in line with the turning axle of motor 162 on dull and stereotyped 131 both sides up and down.Motor 162 makes the dull and stereotyped 131 sense of rotation rotations by arrow d indication shown in Figure 10 (A), gets axostylus axostyle 134 and 135 as turning axle.
The orientation of motor 160 and 162 turning axles is mutually vertical and the two and the light that passes are perpendicular.In addition, angular transducer 163 and 165 are set for motor 160 and 162 respectively.Angular transducer 163 and 165 is respectively applied for the rotation angle that detects motor 160 and 162, thereby allows the correcting value of the optical axis that passes light is detected.
In the optical axis correcting unit 8 that adopts said structure, the signal of correction control circuit 14 outputs, i.e. representative offers motor 160 and 162 with the signal of its gain-adjusted cinefilm 1 position, and they make dull and stereotyped 130 and 131 rotations again respectively, and the optical axis that passes light is proofreaied and correct.
In more detail, shown in Figure 10 (B), dull and stereotyped 130 orientation is perpendicular to the optical axis L of the light that passes sheet window unit 5, optical axis L and the optical axis L of passing dull and stereotyped 130 light ' be in line.Shown in Figure 10 (B), axle 132 rotations when motor 160, make dull and stereotyped 130 to tilt to when departing from vertical optical axis L direction θ angle, pass the optical axis L of dull and stereotyped 130 light ' with perpendicular to dull and stereotyped 130 and comprise optical axis L offset distance x on the plane surface of optical axis L, its orientation keeps parallel with optical axis L.
Suppose that dull and stereotyped 130 thickness is d, its refractive index is n.In this case, angle θ and satisfy following equation (6) apart from x:
x=(d(tanθ-d(tan(sin -1(sinθ／n)))×?tan(π／2-θ) (6)
Following formula shows, under the enough little situation of angle θ, is directly proportional with angle θ apart from x.
Equally, axle 134 rotations when motor 162, make dull and stereotyped 131 to tilt to when departing from vertical optical axis L direction one angle, pass the optical axis L of the light of flat board 131 ', its offset distance x with perpendicular to dull and stereotyped 131 and comprise that the optical axis L anglec of rotation is directly proportional on the plane surface of optical axis L, its orientation keeps parallel with optical axis L.
In this way, according to the signal of representing cinefilm 1 position, can make optical axis L ' on two orthogonal directions, be offset.As a result,, cinefilm 1 suspends on position of physical slot even suspending departing from its hypothesis, can the capable compensation of contraposition offset shift-in, thus can not produce image blurring.
It should be noted that, in No. 5608474 U.S. patent documents of issuing such as 4 days March in 1997 incorporated by reference that belongs to the present inventor, describe this method and device in detail and other is a method and apparatus of avoiding image blurring that optical axis is proofreaied and correct here.Specifically, the invention is not restricted to parallel flat board 130 and 131, also can adopt the convex lens that respectively have the plane and concavees lens, by liquid being charged into the acousto-optical device that the prism that forms in two gaps between the platform material or cycle change.The refractive index of the acousto-optic medium by piezoelectric oscillator is as what disclose in No. 5608474 United States Patent (USP).
As mentioned above, as cinefilm 1 position probing result, because the correction to offset is based on the signal determining of sensor 11 and 12 outputs for not unusual, can be with the position of pin-point accuracy to film 1, even comprise the position of film 1 contact and the position of the film perforation 10 that produces is detected on part film 1.As a result, always can proofread and correct image blurring with pinpoint accuracy very.
In addition, if as the testing result of cinefilm 1 position, the signals of sensor 11 and 12 outputs all are determined not unusual, to the correction of offset then based on the mean value of signal.For this reason, can image blurring be compensated with higher degree of accuracy.
As a result, can also strengthen the stability of projection position of image and the image quality of raising image.
As mentioned above, the present invention is applied to telecine unit, but is not limited to this device.Do not wish given before this explanation is laid down a definition in limited meaning scope.For example, the present invention also can be applied to need to determine all devices of film position.Except above-mentioned telecine unit, the example of this device also handlebar picture record is recorded in projector visual on the cinefilm to pen recorder and projection on the cinefilm.
In addition, as mentioned above, in the present embodiment, cinefilm is carried off and on.Yet, it should be noted that the present invention also can be applied to carry continuously the situation of cinefilm.
In addition, though adopt optical axis correcting unit 8 fuzzy pictures to be compensated in the present embodiment with optical mode,, the method that the method that fuzzy pictures is compensated is not limited to adopt in the present embodiment.For example, can use signal Processing is carried out in the output of ccd video camera 9, fuzzy pictures be compensated with electrical way.
In addition, though the position of cinefilm 1 adopts the electrostatic capacitance technology to detect in the present embodiment,, the method that the method that film 1 position is detected is not limited to adopt in the present embodiment.For example, by also can detect the position of cinefilm 1 such as this class device of optical sensor.
In addition, in the present embodiment, two sensors are set, i.e. sensor 11 and 12 is used for the position of sensing cinefilm 1.Yet, should be noted that up to the present given description do not wish to be counted as a kind of restriction situation.In other words, scope of the present invention is not limited to two sensors.For example, three or more sensors can be set.In addition, sensor 11 and 12 is installed in upstream side and the downstream of cinefilm 1 relative screening zone 31 or opening 7A respectively, yet, it should be noted that the installation site of sensor is not limited to these positions.For example, can in a plurality of sensors be arranged on the screening zone 31, and remaining sensor is installed on sheet window unit 5 other position in addition.
Yet, need can not become the contact that a plurality of sensors are installed in cinefilm 1 simultaneously on the position that sensing station detects target.More particularly, need be installed in a plurality of sensors on the position that is spaced from each other certain distance.In addition, also need a plurality of sensors are installed on such position, promptly before intermittent film transport operating period cinefilm 1 was suspended, the contact that does not have film 1 was near any one sensor.In addition, since film in the problem that can be caused fuzzy pictures by misalignment on the position of showing, also need a plurality of sensors are installed on the position near screening zone 31 or opening 7A.
According to above-mentioned film processing device and method, a plurality of film position detecting devices are set on the diverse location that the film position is detected, according to one or more signals of film position detecting device output, adopt the offset means for correcting that the offset of film is compensated.As a result, always can be recorded in the fuzzy pictures that occurs usually in the image on the film to projection with pin-point accuracy very compensates.Specifically, a plurality of film position detecting devices (sensor 11 and 12) are set on different positions, each pick-up unit detects and the outgoing position detection signal the position in the relative precalculated position of film.Position detection signal is offered abnormity determining device (film testing circuit 53,54), and it judges whether position detection signal unusually also exports the anomaly detection signal that is confirmed as each unusual position detection signal.Position detection signal and anomaly detection signal are offered offset means for correcting (control circuit 55, switch 57,58, capacitor 59, operational amplifier 60, dull and stereotyped 130,131, motor 160,161, axle 132,134 and angular transducer 163,165), it according to be judged to be by abnormity determining device not unusual position detection signal to film offset proofread and correct.Notice that as mentioned above, the offset means for correcting is not limited to optical axis means for correcting (can enough other mechanisms that skew is proofreaied and correct to film substituting dull and stereotyped 130,131, motor 160,162, axle 132,134 and angular transducer 163,165) usually.Film guiding device (film guide 5) produces an opening (opening 7A) that allows light pass through to the film channeling conduct on the film guiding device.The film position detecting device is arranged on the film guiding device.
Although provided and described the present invention at preferred embodiment, various changes and modifications are considered to be within the described the spirit and scope of the present invention as claims.Wish that corresponding construction, material, effect and the equivalent of all devices in the following appending claims or step and functional unit can comprise any structure, material or the effect that realizes these functions and other claim that resembles specific requirement in claims.

Claims (16)

1. film processing device that film is handled is characterized in that it comprises:
A plurality of film position detecting devices that are arranged on the diverse location, each pick-up unit detects the position and the outgoing position detection signal in the relative precalculated position of film;
To its abnormity determining device that position detection signal is provided, determine whether described position detection signal unusually also exports the anomaly detection signal that is confirmed as each unusual position detection signal; And
Provide the offset means for correcting of position detection signal and anomaly detection signal to it, be judged to be the offset that not unusual position detection signal is proofreaied and correct film according to described abnormity determining device.
2. film processing device as claimed in claim 1 is characterized in that: described offset means for correcting carries out optical correction to the offset of film.
3. film processing device as claimed in claim 1, it is characterized in that: described film position detecting device is installed on the position that enough separates each other, so that any contact that exists in the film can not become the target that all film position detecting devices carry out position probing simultaneously.
4. film processing device as claimed in claim 1 is characterized in that further comprising:
Guide the film guiding device of described film, on described film guiding device, produce the perforate that allows light pass through; And
On described film guiding device, the film position detecting device is set.
5. film processing device as claimed in claim 4 is characterized in that: the upstream and downstream side of the film path of the described perforate that produces on described relatively film guiding device is provided with described film position detecting device at least.
6. film processing device as claimed in claim 1 is characterized in that: described offset means for correcting comprises:
Control device with position detection signal and anomaly detection signal provide is judged to be the position detection signal that is not unusual according to described abnormity determining device and produces the offset correction signal. And
The means for correcting that provides with the offset correction signal, the offset of proofreading and correct described film according to described offset correction signal.
7. film processing device as claimed in claim 6 is characterized in that: described means for correcting is done optical correction to the offset of described film.
8. film processing device as claimed in claim 6, it is characterized in that: described film position detecting device comprises first sensor at least, produce the primary importance detection signal and second sensor, produce second place detection signal, the control circuit that provides with anomaly detection signal is provided described control device, the value averaging circuit that provides with first and second position detection signals, export a mean place detection signal, and by the switch of described control circuit control, select and output primary importance detection signal, in second place detection signal and the average position detection signal one, as described offset correction signal, here, when described abnormity determining device determined that the unusual and second place detection signal of primary importance detection signal is unusual, described control circuit made described switch output primary importance detection signal; When described abnormity determining device determined that the unusual and second place detection signal of primary importance detection signal is unusual, described control circuit made described switch output second place detection signal; Perhaps when described abnormity determining device determines that the unusual and second place detection signal of primary importance detection signal is also unusual, described control circuit makes described switch output mean place detection signal.
9. film processing device as claimed in claim 8, it is characterized in that: described film position detecting device further comprises a sampling and a holding circuit by described control circuit control, and described control circuit makes described sampling and holding circuit export current offset correction signal immediately before described abnormity determining device is made all unusual judgement of first and second position detection signals.
10. the film disposal route that film is handled is characterized in that it comprises the following steps:
On diverse location, detect position and the output and the corresponding position detection signal in each position in the relative precalculated position of described film;
Determine whether described position detection signal unusually also exports the anomaly detection signal that is confirmed as each unusual position detection signal; And
Be judged to be not unusual position detection signal according to described abnormity determining device, proofread and correct the offset of described film.
11. film disposal route as claimed in claim 10 is characterized in that: the step of described correction film offset comprises the step that the optical axis of the light of propagating by described film is proofreaied and correct.
12. film disposal route as claimed in claim 10, it is characterized in that: when described abnormality juding step is judged to be all position detection signals when unusual, described offset aligning step is proofreaied and correct the offset of film according in the preceding result of adopted position detection signal in described film position probing step output in once proofreading and correct.
13. film disposal route as claimed in claim 10, it is characterized in that: film position probing step is along carrying out simultaneously on each position that separates on the film length, thereby any contact that appears on the film can not become the target of carrying out position probing in all film position probing steps simultaneously.
14. film disposal route as claimed in claim 10 is characterized in that further comprising step:
To the film channeling conduct on the opening of logical light;
At the adjacent openings place, carry out film position probing step.
15. film disposal route as claimed in claim 10 is characterized in that: described film position probing step is to carry out in the upstream side and the downstream of the relative opening walking of film distance at least.
16. a cinefilm image projecting device is characterized in that: the hole by the synchronous walking of formation on relative cinefilm is vertical intermittently stops cinefilm in the mode with sprocket wheel rotation synchronised; Rayed from light source is in the state area that is stopped the reference position at cinefilm, and described visual projecting device comprises:
Detecting device is offset it according to the synchronous walking hole to cinefilm and detects and export the diverse location detection signal that departs from the deviation of reference position corresponding to film on each position in a plurality of positions of reference position when stopping;
With the abnormality juding circuit that position detection signal provides, determine whether position detection signal unusually also exports the anomaly detection signal that is determined each unusual position detection signal; And
The optical axis correcting unit that provides with position detection signal and anomaly detection signal is proofreaied and correct the optical axis of the light that sees through cinefilm according to be judged to be not unusual position detection signal by abnormity determining device.
CN 98115163 1997-06-26 1998-06-26 Film processing apparatus and film processing method Pending CN1204069A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 98115163 CN1204069A (en) 1997-06-26 1998-06-26 Film processing apparatus and film processing method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP169862/97 1997-06-26
CN 98115163 CN1204069A (en) 1997-06-26 1998-06-26 Film processing apparatus and film processing method

Publications (1)

Publication Number Publication Date
CN1204069A true CN1204069A (en) 1999-01-06

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CN 98115163 Pending CN1204069A (en) 1997-06-26 1998-06-26 Film processing apparatus and film processing method

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CN (1) CN1204069A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107317948A (en) * 2016-04-27 2017-11-03 柯尼卡美能达株式会社 Image read-out and its control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107317948A (en) * 2016-04-27 2017-11-03 柯尼卡美能达株式会社 Image read-out and its control method

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