JPH09325265A - Data recorder for movie film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data recorder for a movie film capable of improving the quality of a reproduced movie film, especially, an SN ratio. SOLUTION: As for the data recorder for a movie film for digitally recording data on the movie film video, the recorder is constituted of a light emitting part 10 which is lighted and driven in accordance with the video data, and a lens group for condensing the light emitted from the light emitting part 10 on the movie film and also constituted of a 1st group and a 2nd group arranged in this order from the light emitting part 10, and the 1st group is constituted of two or three lenses, the 2nd group is constituted with a nearly Gaussian lens arrangement, the recorder is provided with optical systems 13L and 13R satisfying the following expressions; fF/fR>6.5 and f/fR=1.7 to 2. 2, provided that f denotes the focal length of the whole group, fF denotes the focal length of the 1st group and fR denotes the focal length of the 2nd group.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motion picture film data recording apparatus for digitally recording data regarding motion picture film sound.

[0002]

2. Description of the Related Art Conventionally, in order to record a digital sound on a motion picture film, light emitted from a light source for sound recording is arranged on the motion picture film, for example, in a row of square points of 25 μm square. A lens device is used to form an image.

As a lens used in this lens device, a so-called cine camera lens or a CCD camera lens is usually used.

[0004]

By the way, the edges of each 25 μm square image at the above-mentioned audio recording portion on the motion picture film must be extremely clear in order to obtain a good SN ratio during reproduction. Therefore, the above lens device is required to be in focus when the ratio of the focal length to the lens aperture, that is, the aperture ratio (F value) is small.

Although it is desirable to use a light source that emits monochromatic light as the light source, at present, a light emitting diode that emits blue light having a relatively wide wavelength range is often used.

Further, the aperture ratio and the aberration amount have a relationship that the aberration amount increases as the aperture ratio decreases, and conversely the aberration amount decreases as the aperture ratio increases.

Therefore, the above lens device is required to obtain a low aberration amount with a minimum aperture ratio.

However, lenses for cine cameras and lenses for CCD cameras have large aberrations, especially on the short wavelength side. Therefore, it is necessary to set the F value to a smaller aperture than 5, 6. Also,
When the F value is reduced to 5 or 6, phenomena such as underexposure and diffraction occur, and this effect deteriorates the image, and the edges of each 25 μm square image are not clearly recorded and reproduced. It led to the deterioration of the SN ratio at that time.

Therefore, the present invention has been made in view of the above-mentioned circumstances, and the quality of the motion picture film to be reproduced, particularly S.
It is an object of the present invention to provide a data recording device for a motion picture film that can improve the N ratio.

[0010]

A motion picture film data recording apparatus according to the present invention is a motion picture film data recording apparatus for digitally recording data related to sound of a motion picture film, and is driven to light according to the data related to the sound. The light emitting means and the light emitted from the light emitting means are condensed on the motion picture film, and the lens group is composed of a first group and a second group from the side closer to the light emitting means. The second lens unit is composed of two to three lenses, and the second lens unit has a substantially Gaussian lens arrangement. The focal length of the entire lens unit is f, the focal length of the first lens unit is f _F , and the focal length of the second lens unit is the focal point. When the distance is f _R , f _F / f _R > 6.5 and f / f _R = 1.7 to 2.
2 is satisfied, the above-mentioned problem is solved.

According to the above-mentioned movie film data recording apparatus, an optical system including two lens groups, that is, a first lens group and a second lens group, which are closer to the light emitting means, is provided to satisfy the above conditional expression. Thus, when the recording light from the light emitting means is condensed, the amount of aberration can be suppressed even at a small aperture ratio. By using this optical system, clear data can be recorded on a motion picture film.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A specific example of a motion picture film data recording apparatus according to the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the motion picture film data recording device is a motion picture film data recording device for digitally recording data relating to the sound of the motion picture film 20, and is driven to emit light in accordance with the data relating to the sound. Part 10 and the light emitted from the light emitting part 10 is condensed on the motion picture film 20, and
Is composed of a lens group consisting of a first group and a second group from the side closer to, and the first group is composed of two to three lenses,
The second group is configured by a substantially Gauss type lens arrangement, the focal length of all groups is f, the focal length of the first group is f _F , and the second group is
Assuming that the focal length of the group is f _R , f _F / f _R > 6.5 and f / f _R = 1.7 to 2.2 (1) Is to have.

According to the motion picture film data recording apparatus, a so-called bright lens having a ratio of the focal length to the lens aperture of the optical systems 13L and 13R, that is, an aperture ratio of 2, can be realized with a small aberration, and a recording light source. It is possible to use a blue light source for the light emitting unit 10.

As will be described later, in each of the specific examples,
Audio data for one line to be recorded on a movie film is recorded with, for example, 64 dots, and the audio data is recorded for each line. For this reason, 64 light emitting elements are provided for each of the left and right channels of the light emitting unit 10.

The light emitting unit 10 is composed of, for example, 64 light emitting diodes (LEDs), and is driven to light in accordance with the data relating to the voice, for example, voice data. Each LED
Is a blue light source having a peak wavelength of 450 nm, for example. Further, the blue light obtained by turning on the LEDs is sent to the optical systems 13L and R via the optical fiber bundles 11L and R and the emitting portions 12L and R.

The light emitting unit 10 has 64 right and left channels.
Since each LED has one LED, each L
Optical fiber bundles 11L, R provided corresponding to the ED
Also consists of 64 optical fibers for each channel.

The optical systems 13L and R collect the blue light emitted from the emitting portions 12L and R, and color-correct the blue light from 370 nm to 480 nm so that the subject illuminated by each of the light sources is set to 0. Digital soundtrack 1 for left and right channels of motion picture film reduced to .04x
The recording area of 25 μm square on 25 L and R is focused.

There are only 64 recording areas of 25 μm square per line for each channel. In addition, the color correction area of the blue light 37
0 nm to 480 nm is a range in which the spectral sensitivity of the motion picture film is taken into consideration.

Here, three concrete structural examples of the optical systems 13L and 13R will be described.

The numerical values in the expression (1) as a conditional expression in each structural example are as follows.

In the first configuration example (configuration example 1), f
_F / f _R = 7.68 (> 6.5), f / f _R = 2.16
(1.7 ≦ f / f _R ≦ 2.2).

In the second configuration example (configuration example 2), f _F / f _R = 7.07 (> 6.5), f / f _R =
It is 1.89 (1.7 ≦ f / f _R ≦ 2.2).

In the third configuration example (configuration example 3), f _F / f _R = 6.85 (> 6.5) and f / f _R =
1.74 (1.7 ≦ f / f _R ≦ 2.2).

Further, regarding each symbol in each structural example, r indicates the radius of curvature of the surface, and d indicates the surface interval.

Configuration Example 1 is shown in Table 1 below.

[0027]

[Table 1]

As shown in FIG. 2, the optical system of Structural Example 1 has a first group and a second group.

The subject distance is 350 mm from the first surface.
The optical characteristics of this optical system when The total lens focal length f is 16.842, the first lens focal length f _F is 59.815, and the second lens focal length f _R is 7.79.
3. Therefore, f _F / f _R = 59.815 / 7.7
93 = 7.68, f / f _R = 16.842 / 7.793
= 2.16.

First, a curve showing the amount of lateral aberration when the aperture ratio is F2 is shown in FIG. 3, and a curve when the image height standing on the image plane is 1 mm from the optical axis is shown in FIG. 3 (a). , Below.
The curve of 85 mm is shown in FIG. 3 (b), the curve of 0.70 mm is shown in FIG. 3 (c), the curve of 0.5 mm is shown in FIG.
The curve of 0 mm, that is, the axis is shown in FIG.

The spherical aberration amount of this optical system is shown in FIG.

The astigmatism amount of this optical system is shown in FIG.

The amount of distortion of this optical system is shown in FIG.

In the figure, the curve A indicates that the incident light is 4
The aberration amount when the incident light is 50 nm is shown, the curve B shows the aberration amount when the incident light is 380 nm, and the curve C shows the aberration amount when the incident light is 480 nm. Further, S indicates a sagittal image plane, and T indicates a tangential image plane.

Configuration example 2 is shown in Table 2 below.

[0036]

[Table 2]

The optical system of Structural Example 2 is configured to have a first group and a second group, as shown in FIG.

The subject distance is 350 mm from the first surface.
8 to 11 show the optical characteristics of this optical system when
Show. The focal length f of the entire group is 16.502, and the focal length of the first group
Separation f _F Is 61.838, and the focal length f of the second group is_R Is 8.7
50. Therefore, f_F / F_R = 61.838 / 8.
750 = 7.07, f / f_R = 16.502 / 8.75
It becomes 0 = 1.89.

First, a curve showing the amount of lateral aberration when the aperture ratio is F2 is shown in FIG. 8, and a curve when the image height standing on the image plane is 1 mm from the optical axis is shown in FIG. 8 (a). , Below.
The curve of 85 mm is shown in FIG. 8B, the curve of 0.70 mm is shown in FIG. 8C, the curve of 0.5 mm is shown in FIG.
The curve of 0 mm, that is, the axis is shown in FIG.

The spherical aberration amount of this optical system is shown in FIG.

The amount of astigmatism of this optical system is shown in FIG.

The amount of distortion of this optical system is shown in FIG.

Configuration Example 3 is shown in Table 3 below.

[0044]

[Table 3]

The optical system of Structural Example 3 is configured to have a first group and a second group, as shown in FIG.

The subject distance is 350 mm from the first surface.
13 to 16 show the optical characteristics of this optical system when
Shown in The total lens focal length f is 16.353, the first lens focal length f _F is 64.290, and the second lens focal length f _R is 9.
389. Therefore, f _F / f _R = 64.290 / 9.
389 = 6.85, f / f _R = 16.353 / 9.38
9 = 1.74.

First, a curve showing the amount of lateral aberration when the aperture ratio is F2 is shown in FIG. 13, and a curve when the image height standing on the image plane is 1 mm from the optical axis is shown in FIG. 13 (a). A curve of 0.8 mm is shown in FIG. 13 (b), a curve of 0.75 mm is shown in FIG. 13 (c), and a curve of 0.5 mm is shown in FIG. 13 (d).
Fig. 13 (e) shows 0.0 mm, that is, a curve on the axis.

The amount of spherical aberration of this optical system is shown in FIG.

The amount of astigmatism of this optical system is shown in FIG.

The amount of distortion of this optical system is shown in FIG.

17 to 20 show the optical characteristics obtained as a result of changing the distance between the first group and the second group in the above configuration example 1 and increasing the reduction ratio by 1.2%.

First, a curve showing the amount of lateral aberration when the aperture ratio is F2 is shown in FIG. 17, and a curve when the image height standing on the image plane is 1 mm from the optical axis is shown in FIG. 17 (a). The curve of 0.85 mm is shown in FIG. 17 (b), the curve of 0.70 mm is shown in FIG. 17 (c), and the curve of 0.5 mm is shown in FIG.
In (d), 0.0 mm, that is, the curve on the axis is shown in FIG.
Each is shown in (e).

The spherical aberration amount of this optical system is shown in FIG.

The astigmatism amount of this optical system is shown in FIG.

The amount of distortion of this optical system is shown in FIG.

Further, as an example deviating from the equation (1),
Consider the optical aberration characteristics in the example of f _F / f _R = 5.37 and f / f _R = 2.03. The total focal length f of this optical system is 15.811, the focal length f _F of the first group is 41.871, and the focal length f _R of the second group is 7.800. Therefore, f _F / f _R = 41.871 / 7.80
0 = 5.37, f / f _R = 15.811 / 7.800 =
It becomes 2.03.

21 to 2 show the optical characteristics when d4, that is, the distance between the first group and the second group is 15.22 mm, that is, when the reduction ratio is the same as in the above-described respective configuration examples.
4 and d4 is 15.54 mm, that is, d4 = 15.
25 to 28 show the optical aberration characteristics when the reduction ratio is increased by 1.2% from the reduction ratio at 22 mm.

The lateral aberration amount when d4 = 15.22 mm is shown in FIG.

The spherical aberration amount at this time is shown in FIG.

The astigmatism amount at this time is shown in FIG.

The amount of distortion at this time is shown in FIG.

The lateral aberration amount when d4 = 15.54 mm is shown in FIG.

The amount of spherical aberration at this time is shown in FIG.

The amount of astigmatism at this time is shown in FIG.

The amount of distortion at this time is shown in FIG.

By the way, the change when the reduction ratio is increased by 1.2 times is compared between the optical system satisfying the formula (1) and the optical system not satisfying the formula (1).

Therefore, the change from FIG. 3 to FIG.
Compare the change from 1 to FIG. Here, the change from FIG. 3 to FIG. 17 shows the change with respect to the configuration example 1, and the change from FIG. 21 to FIG. 25 shows the change with respect to the optical system having the configuration not satisfying the expression (1). It represents a change.

According to this comparison, it is understood that the change width of the change of the optical system having the constitution not satisfying the expression (1) is larger than that of the constitution example 1. That is,
It is understood that the configuration example 1 that satisfies the expression (1) is more suitable for changing the reduction ratio.

Further, in the configuration example 1, the first group and the second group
FIG. 29 shows the relationship between the change in the distance from the group and the change in the magnification (percentage).

According to FIG. 29, the relationship between the distance between the first group and the second group and the change in magnification has a substantially linear relationship. The range in which the change in magnification is negative represents expansion, and the range in which the change in magnification is positive represents contraction.

Further, it is shown that only by changing the value of d4 by ± 0.5 mm, the image magnification changes by about ± 1.2%, and even if the magnification changes, the aberration is not deteriorated. It can be said that the configuration example 1 is a preferable optical system.

Here, if the conventional method is attempted to change the magnification by about 1.2%, the entire optical system has to be moved by about 4 mm, which causes a heavy load on the hardware. The present invention makes it possible to reduce this burden.

By constructing the optical system as described above,
A so-called "bright" lens having an aperture ratio of F2 is realized with a small amount of aberration. Therefore, it is possible to use a blue light emitting diode with a small light amount as a recording light source.

Further, by simply changing the position of the first group with respect to the second group, fine adjustment of the image size can be easily performed. As a result, the optimum lens for digital sound recording of movie films can be obtained.

Next, a first specific example of the emission parts 12L and 12R of the data recording device for a motion picture film according to the specific example of the present invention is shown in FIG. A head unit 101 for irradiating data,
A plurality of optical fibers 102 arranged according to a data pattern recorded at the other end by the head unit 101,
One end of the optical fiber 102 is connected to each light emitting section, and a plurality of light emitting diodes (LEDs) 103 are turned on and driven according to audio data to be recorded, and audio data amplified by a predetermined gain is supplied to each of the light emitting diodes 103. It is composed of a plurality of amplifier circuits 104 to be supplied.

As described above, in this specific example, one line of audio data to be recorded on a motion picture film is recorded with, for example, 64 dots, and the audio data is recorded for each line. It has become so. Therefore, the optical fiber 102, the light emitting diode 103, and the amplifier circuit 104 are provided in 64 units each, and are housed in the circuit board 105.

The portion of the optical fiber 102 that goes out of the circuit board 105 is the fiber cover 1
It is collectively covered by 12 and is guided to the head portion 101.

The input side of each amplifier circuit 104 is
Connector terminals 106 of the circuit board 105, respectively
It is connected to the. Audio data from the encoder is supplied to the connector terminal 106.

As shown in FIG. 31, the head portion 101 has a substantially L-shaped vertical cross section, and an optical fiber hole 110c having a diameter slightly larger than the diameter of the optical fiber 102 is formed on the front surface portion 110d thereof. A head 110 including an upper head 110a and a flat lower head 110b that are linearly provided according to a data pattern to be recorded, and the head 1 described above.
The head cover 111 has a substantially rectangular emission opening 111a corresponding to the outer shape of the head 10 and covers the head 110.

Each of the optical fibers 102 is guided into the head cover 111 by the fiber cover 112, and is guided to each of the optical fiber holes 110c of the head 110 through the emission port 111a of the head cover 111. After being guided to the optical fiber hole 110c, the respective optical fibers 102 have their tips aligned in a straight line, and are fixed with an adhesive 113 in the head 110 so as not to wobble. Then, the optical fiber 1
02 is fixed with an adhesive 113, and then the head 110
Is covered with a head cover 111 to form the head portion 101.

In the head cover 111, the tip of each optical fiber 102 protruding from the head 110 and the emission port 111a are aligned with each other, or the emission port 111a is positioned more than the tip of each optical fiber 102. The head 110 is provided so as to slightly project. As a result, the front surface of the head portion 101 is shaped such that the tip end portion of each optical fiber 102 is seen from the emission port 111a of the head cover 111, as shown in FIG.

Next, the operation of the motion picture film data recording apparatus according to the first specific example of the LED will be described.

First, in FIG. 33, audio data is supplied to the encoder 121 via the 8-channel input terminal 120, for example. The encoder 121 performs an encoding process suitable for recording on the audio data,
This is supplied to the connector terminal 106 shown in FIG. The audio data supplied to the connector terminal 106 is amplified with a predetermined gain by each amplifier circuit 104 and supplied to each light emitting diode 103. As a result, the light emitting diode 103 is driven to emit light according to the audio data, and the electrical audio data is converted into optical audio data and emitted.

The optical audio data is guided to the tip of the optical fiber 102 by the optical fiber 102 and emitted through the emission port 111a of the head portion 101.

Referring again to FIG. 33, the head portion 1
01 is provided with a total of two for the right channel and the left channel, and is provided so as to face the motion picture film (negative film) 123, respectively.

That is, the motion picture film 123 is provided with a video recording area 123a at substantially the center thereof, and left and right perforations 123b are provided so as to sandwich the video recording area 123a. Also,
For example, between the right-side perforation 123b and the video recording area 123a, right-channel and left-channel analog sound tracks 124R and 124L are provided.
Is provided.

The video recording area 123a, perforations 123b and analog sound tracks 124
The recording positions of R and 124L are SMPT (Sciety Mot.) Which is an association of American movie and television technology companies.
ion picture and television engineers), the audio data is recorded in the video recording area 123a and each analog sound track 124.
It is necessary to record at a position other than the recording position such as R and 124L.

In the motion picture film data recording apparatus according to this example, for example, a surplus area between the right perforation 123b and the right edge 123R of the motion picture film 123 is set to the digital sound track 125R for the right channel.
The left side of the perforation 123b and the left edge 123L of the motion picture film 123 is left as a digital sound track 125L for the left channel, and these digital sound tracks 125R and 125L are arranged along the moving direction of the motion picture film 123. Thus, the audio data for each channel is recorded linearly.

For this reason, the head section 101 for each channel has the digital sound tracks 125R,
The optical audio data emitted from each of the head sections 101 are provided so as to oppose each of the 125 L, and are applied to each of the digital sound tracks 125R and 125L via a recording lens 122. As a result, a dot pattern of audio data corresponding to the array state of the optical fibers 102 linearly arrayed in the head section 101 is recorded on each digital sound track 125R, 125L for each line.

Specifically, for example, the audio data recorded in the digital sound track 125L for the left channel is as shown in FIG. 34, and one line is 64 in the direction orthogonal to the film traveling direction. It is recorded with dots. The audio data is recorded, for example, with 48 lines as one block, and at the beginning of the block, sync data 1 which is a repeating pattern of 6 dots each of white dots and black dots for block synchronization is recorded.
32 are recorded over 3 lines each. Audio data 133 is recorded after the synchronization data 132.

Further, a staggered tracking pattern 130 of white dots and black dots is recorded so as to sandwich the synchronization data 132 and the audio data 133 from both sides and along the traveling direction of the film.

Then, the tracking pattern 130
And the audio data 133 (and the synchronization data 132) are easily identified, the tracking pattern 13 on the left edge 123L side (the right edge 123R side in the case of the digital sound track 125R for the right channel).
An identification pattern 131 of black dots is recorded so that 0 is sandwiched from both sides and along the traveling direction of the film.

The motion picture film data recording apparatus according to the first specific example has a configuration in which optical audio data from each light emitting diode 103 is guided by each optical fiber 102.
Regardless of the arrangement of the optical fibers 102 in the head portion 101, the intervals at which the respective light emitting diodes 103 are provided can be set large.

Therefore, even if the light emitting diodes 103 generate heat by driving the respective light emitting diodes 103 to light, it is possible to prevent the adverse effect of the heat generation on the respective light emitting diodes 103, and thus to prolong the life of the light emitting diodes 103. In addition, it is not necessary to provide a heat sink for heat dissipation, and durability and cost can be improved.

Further, since the optical fiber 102 is linearly arranged in the head portion 101, the dot pattern of the audio data to be recorded on each of the digital sound tracks 125R and 125L can be linearly recorded. . Therefore, the amount of audio data to be recorded can be increased.

It is needless to say that the dot pattern can be made in a staggered pattern by adjusting the arrangement of the optical fibers 102 arranged in the head section 101.

Here, the optical audio data emitted from each of the optical fibers 102 has a variation in the amount of light from the central portion to the peripheral portion. Therefore, the head portion 10
It is also possible to provide a scattering plate (not shown) at one of the emission ports 111a so that the optical audio data can be emitted through the scattering plate. This makes it possible to scatter the optical audio data to be applied to the digital sound tracks 125R and 125L as a whole and to make the light amounts forming the dot pattern substantially equal. Therefore, the dot pattern can be uniformly printed.

Next, the audio data recorded on the motion picture film as described above is reproduced by the motion picture film data reproducing apparatus as shown in FIG.

In FIG. 35, when the audio data is reproduced, each digital sound track 125R, 1 of the motion picture film (positive film) 123 is reproduced.
Two halogen lamps 137 each from the back of 25L
Emits light. As described above, since the audio data is recorded in the black and white dot pattern, only the light emitted to the white dot pattern is transmitted through the digital sound tracks 125R and 125L. Therefore, the light from the halogen lamp 137 has information by passing through the digital sound tracks 125R and 125L, and is incident on the reproducing lens 138 as optical audio data.

The reproducing lens 138 converges the optical audio data and irradiates the CCD line sensor 139 for each channel. Each CCD line sensor 139
Receives the optical audio data, forms an electric signal corresponding to the received light level, that is, electric audio data, and supplies the electric signal to the decoder 140.

The decoder 140 subjects the audio data to a decoding process corresponding to the encoding process performed at the time of recording, and supplies this to the amplifier circuit 141. The amplifier circuit 141 amplifies each of the decoded audio data with a predetermined gain and supplies the amplified audio data to, for example, an 8-channel speaker device 142.

As a result, audio output corresponding to the audio data reproduced from each of the digital sound tracks 125R and 125L of the movie film 123 can be obtained via the speaker device 142.

As shown in FIG. 34, the tracking pattern 130 recorded on each of the digital sound tracks 125R and 125L is recorded so that the boundary between white dots and black dots is located on the extension line of the audio data. There is. Therefore, when the audio data is reproduced, the on-track state is indicated when the detection level of the tracking pattern 130 is an intermediate level between the black dot detection level and the white dot detection level.

Therefore, the tracking pattern 130
By always controlling the reading and tilting of the CCD line sensor 139 or the tilting of the motion picture film 123 so that the detection level of H. It is possible to accurately reproduce audio data in the on-track state.

Next, a description will be given of a motion picture film data recording device to which the second specific example of the LED is applied.

The motion picture film data recording apparatus according to the second specific example is the same as the first specific example of the LED except that the configuration of the head unit 101 is the same as that of the head unit 148 shown in FIG. This is different from the data recording device of the example movie film. Therefore, in the description of the motion picture film data recording apparatus according to the second specific example, only the configuration of the head portion 148 will be described, and the description of the configuration of the other portions will be omitted. Further, in the description of the configuration of the head portion 148, the same components as those of the head portion 101 are designated by the same reference numerals, and the description thereof will be omitted.

That is, in FIG. 36, the head portion 148 is provided with the separator 145 provided in the emission port 111a so as to divide the emission port 111a into a plurality of sections for each optical fiber 102, and the separator 145. The light exit 111a has light-shielding plates 146a and 146b provided in a substantially rectangular shape as shown in FIG.

With such a configuration, the optical audio data emitted from each optical fiber 102 is shielded by the light shielding plates 146a and 146b, and the optical shape of the optical audio data emitted from the emission port 111a. Can have a substantially rectangular shape.

Each of the above digital sound tracks 125
When recording audio data on the R and 125L, the recording is performed while moving the motion picture film 123 at a predetermined speed. At this time, in the motion picture film data recording apparatus according to this example, each of the digital sound tracks is recorded. 1
Since the optical shape of the optical audio data for irradiating the 25R and 125L can be made into a substantially rectangular shape, each of the digital sound tracks 125 has a relationship between the irradiation time of the optical audio data and the moving speed of the movie film 123.
The dot pattern of the audio data recorded on the R and 125L can be made substantially square.

Therefore, the dot pattern of the audio data of each line can be aligned, the recording amount of the audio data can be increased, and the accurate reproduction of the audio data can be contributed.

Here, the optical audio data emitted from each of the optical fibers 102 has a variation in the amount of light from the central portion to the peripheral portion as described above. Therefore, a scattering plate (not shown) is provided on the emission port 111a of the head portion 148.
May be provided, and the optical audio data may be emitted through the scattering plate. This makes it possible to scatter the optical audio data to be applied to the digital sound tracks 125R and 125L as a whole and to make the light amounts forming the dot pattern substantially equal. Therefore, the dot pattern can be uniformly printed.

Next, a description will be given of a motion picture film data recording apparatus to which the third specific example of the LED is applied.

The motion picture film data recording apparatus according to the third specific example is the same as the first specific example of the LED except that the configuration of the head section 101 is similar to that of the head section 160 shown in FIG. This is different from the data recording device for motion picture film to which the example is applied. Therefore, in the description of the motion picture film data recording apparatus according to the third example, only the configuration of the head section 160 will be described, and the description of the configurations of the other parts will be omitted. In the description of the structure of the head unit 160, the same components as those of the head unit 101 are designated by the same reference numerals, and the description thereof will be omitted.

That is, in FIG. 38, the head section 160 has a structure in which the head 110 is provided with an optical path forming section 150 and the head cover 111 is fixed to the optical path forming section 150.

The optical path forming section 150 is composed of an upper optical path forming section 151, a lower optical path forming section 152 and a separator 154, as shown in FIG.

The upper optical path forming portion 151 has a separator holding groove 151 that can hold the separator 154.
A plurality of b are provided corresponding to each of the optical fibers 102. Adhesive surfaces 151a for adhering to the lower optical path forming portion 152 are provided at both ends of the upper optical path forming portion 151, respectively.

The lower optical path forming section 152 is provided with a plurality of separator holding grooves 152b corresponding to the respective optical fibers 102 so as to hold the separator 154, like the upper optical path forming section 151. Further, the upper optical path forming portion 15 is provided at both ends of the lower optical path forming portion 152.
Adhesive surfaces 152a for adhering to 1 are provided respectively.

Each separator holding groove 151b, 152
b is the upper and lower optical path forming portions 15 as shown in FIG.
When the adhesive surfaces 151a and 152a of the adhesive plates 1 and 152 are adhered, they are provided so as to face each other. Therefore, when a separator is inserted into each of the separator holding grooves 151b and 152b and each of the bonding surfaces 151a and 152a is bonded, a plurality of emission ports 155 having a substantially rectangular shape corresponding to the number of the optical fibers 102 are formed. Will be done. The emission port 155 is smaller than the front part 110d of the head 110, and the emission port 155 is
Is provided with a scattering plate 153.

Therefore, when the head portion 160 provided with the scattering plate 153 is viewed from the front, the scattering plate 153 covers the emission port 155 as shown in FIG. 41 (b).

The upper and lower optical path forming portions 151, 15 are also provided.
When the optical path forming portion 150 is formed by adhering the respective adhesive surfaces 151a and 152a of No. 2, the head housing portion 157, which is slightly larger than the outer shape of the head 110, is formed on the side opposite to the emission port 155. The head storage portion 157 stores the head 110.

The head section 160 is shown in FIG.
As shown in (a), the back surface of the optical path forming portion 150 in which the head 110 is housed and the head cover 111 are bonded together.

By configuring the head portion 160 as described above, as shown in FIG. 41A, the optical audio data emitted from the optical fiber 102 is transmitted through the optical path formed by the optical path forming portion 150. And exit port 15
By passing through 5, the optical shape is emitted as optical audio data having a substantially rectangular shape. And the scattering plate 15
It is appropriately scattered by the laser beam No. 3 and is irradiated on each of the digital sound tracks 125R and 125L.

Thus, when the audio data is recorded, the dot pattern of the audio data to be recorded on each of the digital sound tracks 125R and 125L is determined by the relationship between the irradiation time of the optical audio data and the moving speed of the movie film 123. The shape may be substantially square.

Therefore, it is possible to align the dot patterns of the audio data of each line, increase the recording amount of the audio data, and contribute to the accurate reproduction of the audio data.

Further, the optical audio data emitted from the emission port 155 is appropriately scattered by the scattering plate 153, and the digital sound tracks 125R and 125R are respectively.
Since the L light is irradiated, the light amounts of the optical audio data applied to the digital sound tracks 125R and 125L can be equalized as a whole, and the dot pattern of the audio data can be evenly recorded. it can.

In the data recording device for the motion picture film according to the third specific example of the LED, the scattering plate may not be provided. In this case, the square dodd pattern can be recorded on the motion picture film 123 as described above.

Finally, in the description of each of the above specific examples, the audio data of one line recorded on the movie film 123 is 64 dots, and the optical fiber 102, the light emitting diode 103, and the amplifier circuit 104 correspond to this. The description has been given by giving specific numerical values such as 64 pieces each, but this is only an example. For example, the audio data of one line is set to 90 dots, and the optical fiber 102 and the light emitting diode are correspondingly provided. 103, amplifier circuit 104
It is needless to say that various modifications such as the provision of various modifications can be made without departing from the technical idea of the present invention.

By applying the LED as described above, the optical fiber is arranged in the head portion according to the data pattern,
Since the optical audio data from the light emitting element is guided by the optical fiber and the movie film is irradiated from the head portion, the optical fiber can be arranged linearly. Therefore, audio data can be linearly recorded on the motion picture film, and the amount of audio data recorded on the motion picture film can be increased.

Further, the intervals for arranging the light emitting elements can be increased regardless of the intervals between the optical fibers pattern-arranged in the head section. Therefore, it is possible to prevent the disadvantage that the adjacent light emitting elements are adversely affected by the heat generation of each light emitting element, the life of the data recording device can be extended, and it is not necessary to provide a heat sink for heat radiation. Therefore, the cost can be reduced by simplifying the configuration.

Further, the emission port of the head section is partitioned by a separator into a plurality of portions for each optical fiber, and a light-shielding plate is provided so that the emission port of the head section partitioned by the separator has a substantially rectangular shape. With this configuration, the optical shape of the optical audio data emitted from each of the light emitting elements can be rectangular, and the data pattern recorded on the motion picture film can be rectangular.

Alternatively, an optical path forming section for emitting optical audio data from each of the optical fibers through a substantially rectangular optical path to the head section, and an output port of the optical path forming section are partitioned for each optical fiber. Since the separator is provided, the optical shape of the optical audio data emitted from each of the light emitting elements can be rectangular, and the data pattern recorded on the motion picture film can be rectangular. You can

Further, since the scattering plate is provided at the emission port of the head section or the emission port of the optical path forming section, the optical audio data for irradiating the motion picture film is roughly divided for each data pattern. The amount of light can be made uniform, and the data patterns can be evenly recorded.

[0133]

According to the motion picture film data recording apparatus of the present invention, the amount of aberration can be suppressed even when the aperture ratio is small when the recording light from the light emitting means is focused. By using this optical system, clear data can be recorded on a motion picture film. Therefore, it becomes possible to improve the quality of the movie film to be reproduced, particularly the SN ratio.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a main part of a motion picture film data recording apparatus according to a first example of the present invention.

FIG. 2 is a configuration diagram showing a configuration example 1 as an example of a lens configuration of an optical system of the data recording device for the motion picture film.

FIG. 3 is a diagram showing a lateral aberration amount in the configuration example 1;

FIG. 4 is a diagram showing a spherical aberration amount in Configuration Example 1 above.

FIG. 5 is a diagram showing an amount of astigmatism in Configuration Example 1 above.

FIG. 6 is a diagram showing the amount of distortion aberration in the first configuration example.

FIG. 7 is a configuration diagram showing a configuration example 2 as an example of a lens configuration of an optical system of the data recording device for the motion picture film.

FIG. 8 is a diagram showing a lateral aberration amount in the second configuration example.

FIG. 9 is a diagram showing a spherical aberration amount in the second configuration example.

FIG. 10 is a diagram showing an astigmatism amount in the second configuration example.

FIG. 11 is a diagram showing the amount of distortion aberration in the second configuration example.

FIG. 12 is a configuration diagram showing a configuration example 3 as an example of a lens configuration of an optical system of the movie film data recording apparatus.

FIG. 13 is a diagram showing a lateral aberration amount in the configuration example 3 described above.

FIG. 14 is a diagram showing a spherical aberration amount in Configuration Example 3 above.

FIG. 15 is a diagram showing the amount of astigmatism in Configuration Example 3 above.

16 is a diagram showing the amount of distortion aberration in the third configuration example. FIG.

FIG. 17 is a diagram showing the amount of lateral aberration when the magnification of the configuration example 1 is changed.

FIG. 18 is a diagram showing a spherical aberration amount when the magnification of the above-mentioned configuration example 1 is changed.

FIG. 19 is a diagram showing the amount of astigmatism when the magnification of the first configuration example is changed.

FIG. 20 is a diagram showing the amount of distortion aberration when the magnification of the above-mentioned configuration example 1 is changed.

FIG. 21 is a diagram showing a lateral aberration amount obtained by using an optical system that does not satisfy the conditional expression in the optical system.

FIG. 22 is a diagram showing a spherical aberration amount obtained by using an optical system that does not satisfy the conditional expression.

FIG. 23 is a diagram showing an astigmatism amount obtained by using an optical system that does not satisfy the conditional expression.

FIG. 24 is a diagram showing a distortion amount obtained by using an optical system that does not satisfy the conditional expression.

FIG. 25 is a diagram showing the amount of lateral aberration when the magnification is changed for an optical system that does not satisfy the conditional expression.

FIG. 26 is a diagram showing the amount of spherical aberration when the magnification is changed for an optical system that does not satisfy the conditional expression.

FIG. 27 is a diagram showing the amount of astigmatism when the magnification is changed for an optical system that does not satisfy the conditional expression.

FIG. 28 is a diagram showing the amount of distortion when the magnification is changed for an optical system that does not satisfy the conditional expression.

FIG. 29 is a diagram showing a relationship between an interval between the first group and the second group and a change in magnification in the configuration example 1;

[Fig. 30] Fig. 30 is a configuration diagram illustrating a configuration of a main part of a light emitting unit of a first specific example to which an LED used in the data recording device of each movie film is applied.

FIG. 31 is a configuration diagram showing the configuration of a head unit provided in a motion picture film data recording apparatus using the first specific example of the light emitting unit.

FIG. 32 is a front view of the emission port of the head unit.

FIG. 33 is a diagram showing how audio data is recorded by a motion picture film data recording apparatus using the first specific example of the light emitting unit.

FIG. 34 is a diagram showing a data pattern of audio data recorded by a motion picture film data recording apparatus using the first specific example of the light emitting unit.

[Fig. 35] Fig. 35 is a configuration diagram showing a configuration of a movie film data reproducing apparatus for reproducing audio data recorded on the movie film.

FIG. 36 is a perspective view showing a configuration of a head section of a light emitting section of a second specific example to which an LED used in the data recording device for each movie film is applied.

FIG. 37 is a front view of an emission opening of a head portion of a data recording device for a motion picture film including the second specific example of the light emitting unit.

FIG. 38 is a perspective view showing a configuration of a head section of a light emitting section of a third specific example to which an LED used in the data recording device of each movie film is applied.

FIG. 39 is a diagram showing an optical path forming section provided in the head section of a motion picture film data recording apparatus using the third specific example of the light emitting section.

FIG. 40 is a perspective view showing an optical path forming portion provided in the head portion.

FIG. 41 is a cross-sectional view of the head section showing how optical audio data is emitted through the optical path forming section.

[Explanation of symbols]

 10 Light emitting part 12L, R Emitting part 13L, R Optical system

Claims (2)

[Claims] 1. A motion picture film data recording apparatus for digitally recording data related to sound of a motion picture film, wherein a light emitting means which is driven to light according to the data related to the sound, and light emitted from the light emitting means are included in the motion picture film. The lens unit is made up of a lens unit composed of a first unit and a second unit from the side closer to the light emitting means, and the first unit is 2
To 3 lenses, the second lens group is arranged in a Gaussian approximation lens arrangement, and the focal lengths of all the lens groups are f,
The focal length of the first lens unit is f _F , and the focal length of the second lens unit is f _R
And an optical system in which f _F / f _R > 6.5 and 1.7 ≦ f / f _R ≦ 2.2 are satisfied. 2. The data recording apparatus for a motion picture film according to claim 1, wherein said light emitting means comprises a plurality of light emitting elements.