CN87105747A - Holographic motion picture camera - Google Patents
Holographic motion picture camera Download PDFInfo
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- CN87105747A CN87105747A CN 87105747 CN87105747A CN87105747A CN 87105747 A CN87105747 A CN 87105747A CN 87105747 CN87105747 CN 87105747 CN 87105747 A CN87105747 A CN 87105747A CN 87105747 A CN87105747 A CN 87105747A
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Abstract
What the present invention proposed is a kind of holographic motion picture camera.It relates to the holographic film shooting technique in the engineering optics field.Mainly by Laser Power Devices, holographic photography light path system with send chip system to be formed synchronously.It has simple in structure, working stability is reliable, and can take high-quality hologram to the thing field of the big depth of field, outer light path is also very simple, easy and simple to handle, cheap and be convenient to characteristics such as commercial production.
Description
The present invention relates to the holographic motion picture camera in the engineering optics field.
The film of three-dimensional image not only has great application value in scientific research and commercial production, but also has huge artistic value.
Common kinematograph can only obtain the image of two dimension.The stereoscopic sensation of utilizing stereoscopic effect to produce is the product in people's subjective vision effect, and is not that image itself has three-dimensional information.In order to obtain three-dimensional image, just must rely on holography.In order to make holographic movie, holographic motion picture camera is necessary can be with the repetition frequency of per second greater than 24 width of cloth, continuous working a period of time.For this reason, in holographic motion picture camera,, must export laser pulse continuously with the repetition frequency of per second greater than 24 times with good coherence as the pulsed laser of coherent source
Though the YAG frequency double laser can with the repetition frequency of per second tens times continuously output have the laser pulse of considerable energy.But,, be very difficult technically if require these light pulses to remain the feature of single longitudinal mode and single transverse mode.And single longitudinal mode and single transverse mode are the necessary conditions that laser instrument can be used in holograph.Particularly for the thing field of the big depth of field, light pulse must have enough big coherent length, could implement holograph.In this case, technical difficulty is just bigger.For example, if the note coherent length is L, light wavelength is λ, and line width is △ λ, and following funtcional relationship is then arranged between the three:
L=(λ
2)/(Δ λ) or Δ λ=(λ 2)/(L)
If to get coherent length L is 1 meter, light wavelength is 0.53 micron, substitution promptly:
Δλ= (λ
2)/(L) = (0.53
2)/10 =0.2809×10
-6
For the YAG frequency doubling pulse laser of per second with 24 repetition frequency continuous workings, require line width △ λ to satisfy above-listed requirement all the time, be very difficult.
Though utilize prior art can make the ruby pulse laser beam have bigger coherent length, because the ruby laser crystal heat conductivility is poor, ruby laser is difficult to continuous working under the repetition frequency condition of per second 24 times.According to present stage technical merit both domestic and external, even under good cooling condition, the repetition frequency of pulsed ruby laser also can only reach per second 1 to 3 time.This and holographic motion picture camera differ greatly to the requirement of LASER Light Source repetition frequency.
Just because of this, up to now, the holographic motion picture camera that can apply does not appear as yet in the world yet.
Purpose of the present invention is to provide a kind of holographic motion picture camera with practical value.According to holographic motion picture camera provided by the invention, not only simple in structure, working stability is reliable, and can take high-quality hologram to the thing field of the big depth of field.In addition, also to have outer light path simple, easy and simple to handle, cheap and be convenient to industrial characteristics for this holographic motion picture camera.
Accompanying drawing 1 is the spatial placement synoptic diagram of optical resonance subchannel.
Accompanying drawing 2 is cross-sectional views of hyperchannel combination laser device.
Accompanying drawing 3 is synoptic diagram of holographic motion picture camera.
Holographic motion picture camera provided by the invention is made up of three parts, i.e. LASER Light Source, holographic photography light path system and send chip system synchronously.LASER Light Source wherein is a multichannel combined laser.Above-mentioned multichannel combined laser has several optical resonance subchannels.Each optical resonance subchannel, identical structure is all arranged, that is, the optical resonator that oneself is all arranged, working-laser material, pumping system and Q-switch, the good laser pulse of emission mode independently, the central axis of each optical resonance subchannel, parallel mutually, and equally spaced be arranged on the same face of cylinder, as shown in Figure 1.PQ wherein is the central axis on the face of cylinder, and four optical resonance subchannels are represented with a, b, c, d respectively.The central axis of these optical resonance subchannels, parallel each other ， And and equally spaced being distributed on the same face of cylinder.These subchannels have identical optical texture.For example, be distributed in the optics part in addition on the α passage, wherein 1 be mode selecting etalon, 2 is working-laser material, 3 is Q-switch, 4 is the total reflection medium film sheet.The pumping system of each subchannel (comprising the power supply of pumping flashlamp, condenser system, accumulator system and the work of control accumulator system etc.) does not all draw in accompanying drawing 1.Q-switch 3 in the accompanying drawing 1 also can be dye Q-switching or electro-optical Q-switch.When the port number of multichannel combined laser increased, version was still the same.Accompanying drawing 2 is the cross-sectional views with combined laser of 16 passages, and the cross section is by the middle part of working-laser material 2 and the central axis PQ of vertical cylinder face.Wherein 2 are working-laser materials, the 5th, pumping flashlamp, the 6th, oval reflector cavity, the 7th, liquid coolant.
Above-mentioned multichannel combined laser, the opportunity of each subchannel emission light pulse is by same pumping controller control.When each subchannel all adopts dye Q, the pumping controller is according to the time sequencing of layout in advance, provide the high pressure of lighting the pumping flashlamp to trigger electric pulse to each subchannel successively, make each subchannel in the multichannel combined laser, successively by regular hour sequential firing laser pulse.When each subchannel all adopts electro-optical Q-switch, the pumping controller is except pressing prior programmed time sequencing, provide the high pressure of lighting flashlamp to trigger electric pulse to each subchannel successively, also the electro-optical Q-switch in each subchannel successively provides the accent Q electric impulse signal through suitable time-delay.In addition, the pumping controller also will and send chip system synchronously to the Synchronizable drive systems in the holograph light path system, and the electric impulse signal of synchrodrive is provided.
Holograph light path system in the above-mentioned holographic motion picture camera is made up of synchronous rotary system, three parts of optical axis translation light path and common holographic photographic optics system.Synchronous rotary system is wherein formed by synchronous motor with by the synchronous rotating disk that synchronous motor drives.The revolving shaft of rotating disk overlaps with cylindrical center's line of multichannel combined laser synchronously.Optical axis translation light path is two catoptrons that are parallel to each other and place.These two catoptrons all are fixed on the synchronous rotating disk, and a slice is inclined to 45 with the revolving shaft of synchronous rotating disk, and the central axis of another sheet and a certain subchannel is inclined to 45.The light pulse of this subchannel emission is passed the light hole of synchronous rotating disk and is entered optical axis translation light path.After translation, the optical axis of above-mentioned light pulse overlaps with the revolving shaft of synchronous rotating disk.The optical axis of common holographic photographic optics system also overlaps with the revolving shaft of synchronous rotating disk.Above-mentioned synchronous rotary system is placed on the output terminal of multichannel combined laser, so that make the light pulse of a certain subchannel emission, after optical axis translation light path, can be coupled in the common holograph light path system and go, to implement pulse holography.The pumping controller should be consistent with each subchannel putting in order on the face of cylinder when the time sequencing of each subchannel of layout emission light pulse, makes the light pulse can be along circumference emission successively one by one.Synchronous motor in the rotary system should make synchronous rotating disk locate rotation successively according to the next electric pulse control signal of pumping controller transmission synchronously, in the hope of the light pulse of each subchannel emission, can both be coupled to successively in the common holograph light path and go.
Send chip system synchronously in the above-mentioned holographic motion picture camera, formed by synchronous rotary system, magazine and egative film.Magazine has two, and one stores unexposed egative film; Another stores the egative film that has exposed.Drive by synchronous rotary system.Rotary system can be the stepper motor of rotary rhythm by the control of pumping controller synchronously, also can be a kinematic train that is directly driven by the synchronous rotary system in the aforementioned holograph light path system.No matter adopt that a kind of, send the synchronous rotary system in the chip system synchronously, all can the magazine synchronized positioning be rotated, to implement synchronous framing pulse holography according to the control signal of pumping controller.
Accompanying drawing 3 is diagrammatic sketch of a kind of holographic motion picture camera.K wherein is a multichannel combined laser.Port number is 48, and body diameter is φ 500; Working-laser material is a ruby, and physical dimension is φ 6 * 80; Transferring the Q mode is dye Q (also can be electric-optically Q-switched).The central axis on the face of cylinder is shown in the dot-and-dash line among the figure.Among the figure 27 is accumulation power supplies of multichannel combined laser.It has 48 groups of independently energy-storage capacitor and corresponding charging system and discharge systems.Each organizes discharge system, the pumping flashlamp in all corresponding optical resonance subchannel.But the work rhythm of above-mentioned accumulation power supply is controlled by the pumping controller.That is, the pumping controller not only will provide charge enable signal to 48 groups of separate accumulator systems, also will be by the time sequencing of prior layout to 48 groups of separate discharge loops, the trigger pip of lighting flashlamp is provided, if adopt electro-optic crystal to transfer Q, then also need to provide the accent Q electric impulse signal of process suitable time-delay to electro-optic crystal.In addition, the pumping controller also will be to the power supply 9 of stepper motor 8, and the power supply 25 of stepper motor 24 provides the reference signal of synchronous rotation respectively.
In the accompanying drawing 3 10 and 11 is transmission gears; The 12nd, bearing spider, the 13rd, synchronous rotating disk, 14 and 15 is the catoptrons that are fixed on the synchronous rotating disk 13.The revolving shaft of synchronous rotating disk 13 and the face of cylinder central lines of multichannel combined laser, the central axis of 48 subchannels equally spaced is distributed on the above-mentioned face of cylinder.On same cylindrical cross-section, the central angle that the central axis of any two adjacent subchannels is opened is 7.5 °.Catoptron 14 and 15 minute surface are parallel to each other, wherein 14 are placed on the light path of subchannel α, and 15 are placed on the axis of rotation of synchronous rotating disk 13, both all with axis tilt angle at 45.The light pulse of launching among so passage α, after the reflection of catoptron 14 and 15, its optical axis is just moved on the position that overlaps with the revolving shaft of synchronous rotating disk 13; This position just in the accompanying drawing 3 common holographic photographic optics system when carrying out holograph to the desired position of incident beam.Common holograph light path system in accompanying drawing 3 is made up of the part in addition or the assembly of sequence number 16 to 22.For different objects, the part number and the layout in addition of common holograph light path system.Can have nothing in common with each other.Go in order can both synchronously to be coupled to the light pulse of each subchannel emission in the common holographic photographic optics system, stepper motor 8 must can make synchronous rotating disk 13 synchronized positioning rotate.That is before a certain subchannel α emission light pulse, rotating disk 13 must make catoptron 14 be positioned on the coupling optical path of holograph synchronously, after the light pulse emission of α passage, rapid again position rotating turns on the coupling optical path of a contiguous subchannel b, waits for subchannel b emission light pulse; Remaining, and the like.
Send chip system synchronously in the accompanying drawing 3, by egative film 28, magazine 23, the power supply 25 of stepper motor 24 and stepper motor is formed.When sending chip system work synchronously, the synchronizing datum signal that stepper motor 24 is provided according to the pumping controller should be able to make the magazine synchronized positioning rotate, and satisfies the requirement of framing holograph.For per second obtains 24 width of cloth holograms, the box-like pulsed ruby laser of 48 channel group in the accompanying drawing 3 adopts cooled with liquid nitrogen.Like this, each optical resonance subchannel all can be with repetition frequency continuous working once in 2 seconds.When the time sequencing of each subchannel emission light pulse of layout, the disengaging time that should get any two adjacent subchannel light pulses is equal to 1/24 second.
K in the accompanying drawing 3, also can adopt the YAG crystal is working-laser material.At this moment, on the light path of synchronous rotating disk 13, can place frequency-doubling crystal, be 0.53 micron light pulse with output wavelength, is used for implementing holograph.In this case, laser instrument can be used general liquid coolant instead, as water without cooled with liquid nitrogen.Owing to adopted multichannel combined laser, so the work repetition frequency of each subchannel is reduced greatly, help the improvement of light pulse pattern and coherence's raising, also help the raising of hologram quality.
Claims (3)
1, a kind of by LASER Light Source, holograph light path system and the holographic motion picture camera that send chip system to form synchronously, it is characterized in that: wherein said LASER Light Source is a multichannel combined laser, it has several laser resonance subchannels, all identical independently optical resonator, working-laser material, pumping system and the Q-switch that oneself is all arranged of the structure of each subchannel can both be launched laser pulse independently; On the locus, the optical axis of these subchannels is parallel each other, and around a central axis, equally spaced is arranged on the same face of cylinder; But the opportunity of each subchannel emission light pulse, by same pumping controller control, the pumping controller is according to each subchannel optical axis putting in order on the face of cylinder, determine the time sequencing of emission light pulse, so that light pulse is launched one by one around the face of cylinder, the pumping controller also will and send chip system synchronously to the Synchronizable drive systems in the holograph light path system, according to the time series of each subchannel emission light pulse, the electric impulse signal that provides synchronized positioning to rotate; The holograph light path system, system is by synchronous rotary system, three parts of optical axis translation light path and common holographic photographic optics system are formed, the revolving shaft of synchronous rotary system, the face of cylinder central axes that is distributed with multichannel combined laser "the philosophers," referring to the philosophers or their works, outside the Confucianists channel center axis, optical axis translation light path is fixed on the rotating disk of synchronous rotary system, it can move to the light pulse of a subchannel emission along the revolving shaft direction and propagate; And is coupled in the common holograph light path and goes, the electric impulse signal of the rotary system synchronized positioning rotation that transmission comes according to the pumping controller synchronously, driving optical axis translation light path synchronized positioning rotates, successively the light pulse of each subchannel emission, be coupled in the common holograph light path by translation and go; Send chip system synchronously, power supply by egative film, magazine, stepper motor and stepper motor is formed, the electric impulse signal that the stepper motor synchronized positioning that transmission comes according to the pumping controller is rotated drives the magazine synchronized positioning and rotates, to realize the requirement of framing holograph.
2, a kind ofly it is characterized in that described multichannel combined laser by the described holographic motion picture camera of claim 1, its port number is 48, and body diameter is φ 500, and working-laser material is a ruby, adopts cooled with liquid nitrogen, and repetition frequency is 2 seconds 1 time.
3, a kind ofly it is characterized in that described multichannel combined laser by the described holographic motion picture camera of claim 1, its port number is 48, and body diameter is φ 500, working-laser material be YAG And through crystal double frequency, export the pulse laser of 0.53 μ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87105747A CN87105747B (en) | 1987-08-18 | 1987-08-18 | Holographic motion picture camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87105747A CN87105747B (en) | 1987-08-18 | 1987-08-18 | Holographic motion picture camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87105747A true CN87105747A (en) | 1988-11-02 |
| CN87105747B CN87105747B (en) | 1988-12-28 |
Family
ID=4815431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87105747A Expired CN87105747B (en) | 1987-08-18 | 1987-08-18 | Holographic motion picture camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87105747B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354082A (en) * | 2011-09-28 | 2012-02-15 | 李雨顺 | Laser holographic film shooting device |
| CN107085220A (en) * | 2017-06-21 | 2017-08-22 | 中国工程物理研究院流体物理研究所 | A kind of full light framing 3D hologram imaging device of trillion amplitude-frequencies and method |
-
1987
- 1987-08-18 CN CN87105747A patent/CN87105747B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354082A (en) * | 2011-09-28 | 2012-02-15 | 李雨顺 | Laser holographic film shooting device |
| CN102354082B (en) * | 2011-09-28 | 2013-07-10 | 李雨顺 | Laser holographic film shooting device |
| CN107085220A (en) * | 2017-06-21 | 2017-08-22 | 中国工程物理研究院流体物理研究所 | A kind of full light framing 3D hologram imaging device of trillion amplitude-frequencies and method |
| CN107085220B (en) * | 2017-06-21 | 2023-09-22 | 中国工程物理研究院流体物理研究所 | Trillion amplitude frequency full-light framing three-dimensional holographic imaging device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN87105747B (en) | 1988-12-28 |
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