SU1429162A1 - Device for digital recording of multiple camera-angle audiophotogram - Google Patents

Abstract

The invention relates to a technique for recording information and improves the recording quality of a phonogram. In the device between the multichannel optical modulator 4 and the cylindrical lens 10 forming the width of the writing bar, there is an irregular scattering raster 8 of the cylindrical lenses 9. The optical axis displacement. Each lens 9 parallel to the optical axis of the channel in the direction opposite to the axis of symmetry of the modulus 13a, you - it detects the deviation of the beam transmitted through the lens 9 from the light source 1 at an angle providing symmetrical illumination of the collecting cylindrical raster 11. The lenses 10 and 12 form signalograms on the carrier 13, forming in the aggregate photophonogram. 2 Il. (Q (L

Description

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I The invention relates to the field of recording information and can be used in the cinema for the optical recording of sound. : The aim of the invention is to improve the quality of recording photophonogram

FIG. Figure 1 shows the optical layout of the device; in fig. 2 is a diagram illustrating the operation of a scattering raster.

I The device contains a source 1, light (FIG. 1), which studies the beam 2 of light, a shaper 3 bar, a multichannel optical modulator 4 lights p channels 5, -5, a sound source 6 with output channels, a cylindrical scattering raster 8 with lenses. A cylindrical lens 10 forming the width of the writing stroke, collecting a cylindrical raster 11, with lenses 11, -11 a cylindrical lens 12 forming the length of the writing stroke, the carrier 13 of the photo-phonogram.

The device works as follows.

The light source 1 emits incoherent light in the form of shndritsch-. Who beam 2 (figure 1).

Shaper 3 stroke forms of the beam. 2 light beam in the form of - a stroke along the cells, multichannel optical modulator 4 light. The light passing through the channels 5 is modulated by electrical signals of a digital code, which arrive at the outputs of the multichannel optical module of the mouth of the light through the electric output channels,. from source 6 beep. . Each light beam that emerged from channel 5 ,, passes further through a cylindrical lens 9v of a diffusing raster 8 (figure 2). The raster lenses 9 are offset relative to the light beam 1 1 (FIG. 2), so that the transmitted beam deviates by an angle providing symmetrical illumination of the collecting cylindrical raster 11. Only the central part of the light beam falls on the width CD of the collecting raster 11, such that the light intensity on the edge 11 at points C and D it is reduced by no more than 12% in accordance with the permissible rate for the recording equipment. Reducing the intensity of light that does not exceed this norm, ensure

It selects the parameters B and f, where B is the distance from the output of the modulator 4 to the collecting raster and f is the focal distance of the raster lenses 8.

The period t of placement of cylindrical lenses 9 in the scattering raster 8 is longer than the period of placement of the T channels of the modulator by the value of MK. Due to the displacement of the axis of the lens 9c, the beam 1c after the passage of the lens is deflected by the angle Rc. From the likeness of ABC and TFR (figure 2)

15

Mjc f

 AT

Then

Mk

Kft

at

0

five

0

five

0

five

0

five

where K 0,1,2, ... is the serial number

cylindrical lens of the scattering raster, calculated from the axis of symmetry of the optical modulator.

It is assumed that the focal length f is incomparably greater than the optical path in the glass of the lens of the O CP beam. Cylindrical lenses forming a width of 10 and a length of 12 of the writing line form sound carrier 13 on the carrier, the number of which corresponds to the number of channels of the modulator 4 and which together form a photophonogram.

The recording quality of the multi-view phonogram has increased due to the recording of all channels of the soundtracks of the phonogram with the same optical density.

Formula of the invention

A device for digital recording of a multi-view photo-phonogram containing a sequentially and optically coupled light source, a multi-channel optical modulator whose optical axes of the channels are parallel in the same plane and symmetrically relative to the axis of symmetry of the modulator, a cylindrical writing line width forming a cylindrical raster, forming cylindrical elements of which are perpendicular to forming a cylindrical lens forming the width of the writing stroke a, and a cylindrical lens of forming a writing stroke, which forms parallel to the forming cylindrical elements of the collecting raster, is characterized in that, in order to improve the recording quality of the photophonogram, an irregular diffusing raster of cylindrical lenses is inserted between the multichannel optical modulator and a cylindrical lens forming the width of the writing stroke forming the cylindrical lenses of the scattering raster parallel forming the cylindrical elements of the collecting cylinder raster screen, with a cylindrical lens of the diffusing raster installed in each canape of a multichannel optical modulator, the optical axis

which is displaced parallel to the optical axis of the channel in the direction opposite to the axis of symmetry of the modulator, by a value M determined from the ratio

Mk

Kft

at

de T - channel placement period

multichannel optical modulator;

f is the focal distance of the lenses of the scattering raster;

B is the distance from the output of the optical modulator to the collecting raster; K 0,1,2,3, ... is the serial number of the cylindrical lens of the diffusing raster, measured from the axis c1 of the metric of the optical modulator.

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Claims (2)

Claim A device for digital recording of a multi-angle phonogram containing a sequentially and optically coupled light source, a multi-channel optical modulator, the optical axis of the channels of which are parallel in one plane and symmetrically with respect to the axis of symmetry of the modulator, a cylindrical lens forming the width of the writing line, collecting a cylindrical raster, forming cylindrical elements which are perpendicular to the generatrix of a cylindrical 1429 lens forming the width of the writing stroke, and a cylindrical lens forming the length of the writing stroke, the generatrix of which is parallel to the generatrix of the cylindrical elements of the collecting raster, characterized in that, in order to improve the recording quality of the phonogram, an irregular scattering raster of cylindrical lenses is inserted into it, mounted between a multi-channel optical ⁷ 'modulator and a cylindrical lens forming the width of the writing line, the cylindrical 15 lenses of the scattering raster are parallel to the generatrices of the cylindrical elements of the collecting cylinder nical raster, wherein each channel in the multichannel optical modulator 20 is mounted a cylindrical diffusing lens raster optical axis 2 ⁴ which is offset parallel to the optical axis of the channel in the direction opposite to the axis of symmetry of the modulator, by the value of M, determined from the relation where T is the period of placement of the channels of the multi-channel optical modulator; f is the focal length of the lenses of the scattering raster; B is the distance from the output of the optical modulator to the collecting raster, K = 0,1,2,3, .., is the serial number of the cylindrical lens of the scattering raster, counted from the axis of symmetry of the optical modulator. 14291 62 Compiled by S. Ilchuk Editor L. Gratillo Tehred L. Serdyukova Proofreader L. Patay Order 5132/48 Circulation 590 Subscription VNIIIPI of the State Committee of the USSR - for inventions and discoveries 113035, Moscow, Zh-35, Raushskaya nab., D. 4/5 Production and printing company, Uzhhorod, st. Project, 4