CN85105775B - Sequential pulse laser transient holographic camera - Google Patents
Sequential pulse laser transient holographic cameraInfo
- Publication number
- CN85105775B CN85105775B CN85105775A CN85105775A CN85105775B CN 85105775 B CN85105775 B CN 85105775B CN 85105775 A CN85105775 A CN 85105775A CN 85105775 A CN85105775 A CN 85105775A CN 85105775 B CN85105775 B CN 85105775B
- Authority
- CN
- China
- Prior art keywords
- laser
- pulse
- road
- holography
- working
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000001052 transient effect Effects 0.000 title claims abstract 5
- 230000003287 optical effect Effects 0.000 claims abstract description 10
- 238000005086 pumping Methods 0.000 claims description 13
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 10
- 239000010979 ruby Substances 0.000 claims description 10
- 229910001750 ruby Inorganic materials 0.000 claims description 10
- 229910052724 xenon Inorganic materials 0.000 claims description 8
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims 2
- 239000013078 crystal Substances 0.000 claims 1
- 238000001093 holography Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000001360 synchronised effect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 abstract description 2
- 238000009432 framing Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2383—Parallel arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
- G01B9/021—Interferometers using holographic techniques
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/0602—Crystal lasers or glass lasers
- H01S3/061—Crystal lasers or glass lasers with elliptical or circular cross-section and elongated shape, e.g. rod
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/0915—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light
- H01S3/092—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light of flash lamp
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/102—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
- H01S3/1022—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the optical pumping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1123—Q-switching
- H01S3/113—Q-switching using intracavity saturable absorbers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Holo Graphy (AREA)
- Lasers (AREA)
Abstract
The invention provides a sequence pulse laser transient holography instrument, belonging to the technical field of laser holography instruments, the structure of which is shown in figure 2, and the sequence pulse laser transient holography instrument can output N laser beams with different spatial positions and controllable intensity in an optical resonant cavity, and the laser beams have good coherence with each other; and the limit of the minimum time interval of two adjacent pulses is zero; when the delta t is adjusted randomly, the relative intensity of the pulse sequence is kept stable all the time; the requirement on a laser power supply is low during working; framing does not require the application of synchronous deflection techniques. The whole instrument has the characteristics of high technical index, stable performance, small volume, light weight and low manufacturing cost.
Description
What the present invention proposed is instantaneous holocamera employing sequential pulse laser.The technical field that belongs to laser holography.
Laser instrument in the pulse holography instrument of prior art, its typical structure is made up of etalon, aperture, pumping source, ruby rod, polarizer, electro-optical Q-switch, total reflection film.Sequence laser pulse wherein, be by electro-optical Q-switch repeatedly open the door and close the door produce.Also must add the synchronous deflector of electric light or acousto-optic in order to utilize the sequence laser pulse to carry out photograph at the output terminal of laser instrument.The dipulse ruby laser of using on the IMPARTI type pulse holography machine referring to the 1984 year manufacturing of american apollo laser company.Such laser instrument is used for train pulse holographic photography system, has following technical matters:
1. prior art is difficult to further to improve the coherence of light pulse, even propose higher requirement to the ruby rod homogeneity with to the depth of parallelism, flatness and the constant temperature of etalon, it is very limited that coherence's raising remains.
2. when the disengaging time of light pulse was adjusted arbitrarily, prior art was difficult to make the energy of each light pulse to remain approximately equal.Prior art also can not make the time resolution △ t of double-exposed hologram
MinThe unlimited raising.The ruby dipulse holocamera that above-mentioned american apollo laser company made in 1984 years only allows △ t to adjust in the scope of 1-500 μ s.Double-exposed hologram time resolution is 1 μ s, and this technical indicator has proposed a lot of requirements to Laser Power Devices, causes that its technical sophistication, structure are huge, the complete machine full weight reaches 1700 pounds, and export price is 170,000 dollars every.
3. prior art must add the synchronous deflector of electric light or acousto-optic at the output terminal of laser instrument when carrying out photograph.Using deflection technique makes hologram in the process that exposure is made, light beam and holofilm produce and relatively move, and cause the drift of interference fringe in exposure process, thereby influence the quality of hologram, reduced the spatial resolution and the diffraction efficiency of hologram, make picture reproducing to resemble qualitative change bad.
The objective of the invention is to: at the problem of above-mentioned existence, a kind of instantaneous holocamera employing sequential pulse laser is proposed, it is in a laserresonator, can export locus, any road laser beam different, controllable intensity, these laser beam can have good temporal and spatial coherence each other, and the limit of the minimum interval of its adjacent two pulses is zero, and make when △ t adjusts arbitrarily, the relative intensity of pulse train remains stable, low to the Laser Power Devices requirement during work, photograph need not the application of synchronized deflection technique.
Accompanying drawing 2 is structural drawing of the present invention.
The structural drawing of the instantaneous holocamera employing sequential pulse laser that accompanying drawing 3 is made up of the ruby laser of four pulses.
(1) in the accompanying drawing 1 is etalon, and (2) are apertures, and (3) are pumping sources, and (4) are ruby rods, and (5) are deflectors, and (6) are electro-optical Q-switchs, and (7) are total reflection films.
(A) in the accompanying drawing 2 is etalon, (B
1) ... (BN) is that N props up xenon lamp, (C
1) ... (CN) is that N props up solid.Working-laser material, (D) be N prop up the Solid State Laser operation material public dye Q-switching, (E) is the total reflection diaphragm, (F) is the pumping device, (G) is register system.
(A) in the accompanying drawing 3 is etalon, (B
1) ... (B
4) be xenon lamp, (C
1) ... (C
4) be four rubies, (D) be four rubies public dye Q-switching, (E) is the total reflection diaphragm, (F) is the pumping controller with triggering opportunity of control No. four flashlamp, (G) is register system.
Below in conjunction with accompanying drawing 2 technical scheme of the present invention is described:
Structure of the present invention is shown in the accompanying drawing 2.Promptly prop up Solid State Laser operation material (C by etalon (A), N
1) ... (CN) is placed in the optical resonator and corresponding with it N props up xenon lamp (B
1) ... (BN), N prop up the Solid State Laser operation material public dye Q-switching (D), total reflection diaphragm (E), pumping controller (F), the instantaneous holocamera employing sequential pulse laser that register system (G) is formed in order to triggering opportunity of control N road flashlamp.
Provide embodiments of the invention below: structure as shown in Figure 3, promptly by etalon (A), four ruby (C
1) ... (C
4) be placed in the optical resonator and four corresponding with it xenon lamp (B
1) ... (B
4), the public dye Q-switching (D) of four rubies, total reflection diaphragm (E), form in order to pumping controller (F), the register system (G) on triggering opportunity of controlling No. four flashlamp.Wherein, the sheet glass of etalon (A) and dye Q-switching (D), both ends of the surface must be strict parallel, both also must be placed in the light path in parallel to each other, can be in the four tunnel controlled light pulses of different spaces position output intensity in the same optical resonator, and it has good coherence each other.Such dye cell had both played the effect of Q-switch, had also played the effect of etalon.Be placed on four ruby (C in the optical resonator
1) ... (C
4), require its crystalline axis direction to be parallel to each other; The optical length of geometrical axis direction is wanted strict and is equated; Physical dimension also will be equal to each other.Though, its sequence laser pulse of being launched of such laser instrument is when disengaging time △ t adjusts arbitrarily, and the energy distribution of light pulse can remain stable, and and the waveform that do not require xenon lamp change with the variation of △ t, so it requires lowly to Laser Power Devices, the complete machine full weight reaches 220 pounds.Because the storage of this each channel energy of laser instrument spatially separates,, thereby make the resolution △ t of double-exposed hologram so the pump power of optical pumping can remain unchanged when △ t diminishes
MinThe limit of theoretical value be zero, the limit that engineering is used equals the width gamma of light pulse self, it brings up to the high degree of the limit to the time resolution of double-exposed hologram, has solved the stability problem of sequence laser pulse, has realized stable photograph.Pumping controller (F) is in fact in order to the synchronizing relay device of the four-way of controlling for four road opportunitys that flashing light triggers.Its input is an electric pulse, and output has four the tunnel, and can be different the time delay on every road.If be △ t the time delay on each road
j(j=1,2,3,4), then this output pulse is respectively the trigger pip of the flashlamp on each passage.Like this,, be transferred on the predetermined numerical value time delay of four-way synchronizing relay device, then as long as with a trigger pulse input four-way synchronizing relay device, a just exportable laser pulse sequence if the accumulator system on every road is charged in advance.Their time interval is by △ t
jBetween difference determine.
Claims (3)
1, a kind of by comprising etalon, pumping source, solid laser working substance, Q-switch, the instantaneous holocamera employing sequential pulse laser that the laserresonator of total reflection diaphragm and pumping controller and register system are formed.It is characterized in that: N road solid laser working substance is set in the described laserresonator, as: ruby and corresponding with it pumping source, i.e. pulse xenon lamp; The minimum interval limit of adjacent two pulses emission is △ t=0 in the pulse laser of N road, and this △ t value is adjustable arbitrarily; The waveform of pulse xenon lamp does not require that the variation with △ t changes, its relative intensity of the train pulse that is sent is stable thus, described pumping controller is a N passage synchronization delay device with triggering opportunity of control N road pulse xenon lamp, its input is an electric pulse, can be different the time delay on every road, and the time interval of pulse train is determined by the difference between each time delay.
2, a kind of by the described laser transient holographic camera of claim 1, it is characterized in that each the road working-laser material in the described laserresonator, its optical length along logical optical axis direction is equal to each other, the optical axis of crystal is parallel to each other, therefore, position relation between N road working-laser material and the pump can be the plane, also can be that the space is provided with.
3, a kind of by claim 1,2 described laser transient holographic cameras, it is characterized in that described N road working-laser material and corresponding with it pumping source, this N value can be a N=4 road pulse system.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85105775A CN85105775B (en) | 1985-07-31 | 1985-07-31 | Sequential pulse laser transient holographic camera |
| JP4428386A JPS6232673A (en) | 1985-07-31 | 1986-03-03 | Sequence pulse solid laser and transient holography apparatus using the same |
| GB8606246A GB2179198B (en) | 1985-07-31 | 1986-03-13 | A sequence pulse solid-state laser and transient holography apparatus using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85105775A CN85105775B (en) | 1985-07-31 | 1985-07-31 | Sequential pulse laser transient holographic camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85105775A CN85105775A (en) | 1986-07-02 |
| CN85105775B true CN85105775B (en) | 1987-12-23 |
Family
ID=4794697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85105775A Expired CN85105775B (en) | 1985-07-31 | 1985-07-31 | Sequential pulse laser transient holographic camera |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS6232673A (en) |
| CN (1) | CN85105775B (en) |
| GB (1) | GB2179198B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4105717A1 (en) * | 1991-02-23 | 1992-08-27 | Aesculap Ag | LASER |
| FR2677185B1 (en) * | 1991-05-30 | 1993-09-24 | Electricite De France | LASER TRANSMITTER IN PARTICULAR FOR THE GENERATION OF ULTRASONIC WAVES AND ITS APPLICATION TO A NON-DESTRUCTIVE NON-CONTACT CONTROL DEVICE. |
| FR2798781B1 (en) * | 1999-09-22 | 2002-08-30 | Saint Louis Inst | LASER SOURCE CAPABLE OF TRANSMITTING MULTIPLE IMPLUSION BEAMS |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1119948A (en) * | 1967-06-24 | 1968-07-17 | Arthur Paul Pedrick | Laser ray beam gun, or concentrator, for use in polar regions, accelerating crop growth, and promoting nuclear fusion reactions |
| JPS4844089A (en) * | 1971-10-08 | 1973-06-25 | ||
| JPS5029429U (en) * | 1973-07-09 | 1975-04-03 | ||
| IT1096353B (en) * | 1977-04-19 | 1985-08-26 | Magneti Marelli Spa | PROCEDURE TO INCREASE THE REPEAT FREQUENCY OF LASER IMPULSES |
| DE2951564C2 (en) * | 1979-12-21 | 1983-02-10 | Messerschmitt-Bölkow-Blohm GmbH, 8000 München | Lasers as directional and beam emitters |
| EP0078654B1 (en) * | 1981-11-02 | 1986-01-29 | General Electric Company | Multiple host face-pumped laser |
| JPS5932189A (en) * | 1982-08-17 | 1984-02-21 | Canon Inc | Light amplifying method and device |
| JPS5950237A (en) * | 1982-09-13 | 1984-03-23 | Akebono Brake Ind Co Ltd | Piston seal of wet type disc brake |
| GB2154364A (en) * | 1984-02-15 | 1985-09-04 | Hughes Technology Pty Ltd | Laser assemblies |
-
1985
- 1985-07-31 CN CN85105775A patent/CN85105775B/en not_active Expired
-
1986
- 1986-03-03 JP JP4428386A patent/JPS6232673A/en active Pending
- 1986-03-13 GB GB8606246A patent/GB2179198B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85105775A (en) | 1986-07-02 |
| GB8606246D0 (en) | 1986-04-16 |
| JPS6232673A (en) | 1987-02-12 |
| GB2179198B (en) | 1989-09-20 |
| GB2179198A (en) | 1987-02-25 |
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| Date | Code | Title | Description |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |