CN86103974A - Multi-frame dynamic holographic photoelastic meter - Google Patents
Multi-frame dynamic holographic photoelastic meter Download PDFInfo
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- CN86103974A CN86103974A CN 86103974 CN86103974A CN86103974A CN 86103974 A CN86103974 A CN 86103974A CN 86103974 CN86103974 CN 86103974 CN 86103974 A CN86103974 A CN 86103974A CN 86103974 A CN86103974 A CN 86103974A
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Abstract
A kind of multi-frame dynamic holographic photoelastic meter comprises the holographic photoelasticity light path.It is characterized in that having laser instrument, pulse-modulator, acousto-optic modulator synchronized recording devices lattice or the drum rotary type pen recorder of output continuously.Characteristics of the present invention are to realize several samplings (each to the hundreds of width of cloth) to process of same sample, can accomplish quantitative Analysis again, and can save hologram recording material, reduce cost.The present invention is widely used in the holographic photoelasticity test of the dynamic perfromance of various materials.
Description
The present invention is a kind of dynamic holographic photo-elastic instrument, particularly a kind of several, the dynamic holographic photo-elastic instrument of Fuli's leaf storage type.
The light source that the dynamic holographic photo-elastic instrument adopts in the prior art has two kinds of many sparks formula or ruby pulse lasers.Many sparks formula photo-elastic instrument can be realized several samplings to same process, but be difficult to quantitative Analysis with this kind interferogram, and many sparks and camera will cause inevitable error not on same optical axis.Adopt the dynamic holographic photo-elastic instrument of ruby pulse laser, can separate principle stress and deviator stress effectively, be beneficial to quantitative Analysis, but, obtain a width of cloth holographic photoelasticity interferogram only because ruby laser commonly used generally only has a pair of dipulse.Though the sequence pulsed ruby laser is arranged, because of it is not that train pulse is right, thus can only records series single exposure hologram, can not get several holographic interference patterns.Therefore, existing dynamic holographic photo-elastic instrument can't obtain several holographic photoelasticity interferograms.
The purpose of this invention is to provide a kind of can be to several samplings of a process of same sample (each one to the hundreds of width of cloth), and dynamic holographic photo-elastic instrument that can quantitative Analysis.
The present invention is achieved in that a kind of multi-frame dynamic holographic photoelastic meter, comprises the holographic photoelasticity light path, it is characterized in that having laser instrument, pulse-modulator, acousto-optic modulator synchronized recording devices lattice or the drum rotary type pen recorder of output continuously.The good continuous laser beam of coherence that the laser instrument of continuous output sends, the pulse modulated device be modulated to the interval of pulse width, internal two pulses of pulse and pulse pair and pulse between all adjustable sequence double pulse laser in interval, its pulse is controlled to number.This laser beam is divided into reference light and object beam through spectroscope, and object beam makes it pass through to be measured behind the beam-expanding collimation again, the portable information with to be measured of this light beam.Existing dynamic holographic is photoelastic, promptly joins the photoelastic interferogram of recording holographic with this thing light wave and reference light.The present invention passes through lens again to above-mentioned wide beam object beam, and near the zone this lens focus in image space is joined object beam and the reference light that does not expand bundle, notes to be measured holographic photoelasticity interferogram.The re-expose method just makes object beam after a pair of pulse laser beam splitting by to be measured before and after changing, and obtains the holographic photoelasticity interferogram that causes because of to be measured STRESS VARIATION.By the thing light of to be measured outgoing, luminous energy density improves greatly after lens focus, and reference light is without expanding bundle, thus make the holographic recording medium time shutter shorten to microsecond, down to tens nanoseconds.Before object beam and reference light junction, adopt acousto-optic modulator synchronized recording devices lattice, can be with several width of cloth of one to be measured stress wave propagation to hundreds of width of cloth holographic photoelasticity interferogram, be recorded on the same holographic media with dot matrix way, or adopt drum rotary type pen recorder to carry out high density recording.Adopt the good continuous output laser of coherence as light source, saved expensive ruby laser; Adopt pulse-modulator, right each pulse width of pulse laser of output, two recurrent intervals of pulse centering and pulse pair and pulse between the interval, all can in a big way, regulate, and laser pulse is to more (reaching the hundreds of width of cloth), thereby can carry out one to stress wave propagation overall process in to be measured and take a sample to the hundreds of width of cloth; Utilize acousto-optic modulator synchronized recording devices lattice or drum rotary type pen recorder, hundreds of width of cloth holographic photoelasticity interferogram can be recorded on the little holographic recording medium, saved hologram recording material widely.
The present invention compared with prior art is characterized in and can realizes several samplings (each to the hundreds of width of cloth) to process of same sample, can accomplish quantitative Analysis again, and can save hologram recording material, reduces cost.
With two embodiment the present invention is further described respectively below in conjunction with accompanying drawing.
Fig. 1 is the schematic diagram that the embodiment of the invention 1 is utilized acousto-optic modulator synchronized recording devices lattice.
Fig. 2 is the schematic diagram that the embodiment of the invention 2 is utilized drum rotary type pen recorder.
The present invention is widely used in the holographic photoelasticity test of the dynamic characteristic of various materials.
Claims (6)
1, a kind of dynamic holographic photo-elastic instrument, particularly a kind of several, the dynamic holographic photo-elastic instrument of Fuli's leaf storage type, comprise the holographic photoelasticity light path, it is characterized in that having a laser instrument of output continuously, pulse-modulator, acousto-optic modulator synchronized recording devices lattice or drum rotary type pen recorder.
2, holographic photoelasticity instrument according to claim 1, it is characterized in that pulse-modulator, select the control power supply (4) of circuit, the series connection of high voltage pulse amplifying circuit to form with electro-optic crystal (3) by program control signal generation circuit, delay circuit, dipulse signal generating circuit, pulse number.
3, holographic photoelasticity instrument according to claim 1 is characterized in that spectroscope in the holographic photoelasticity light path (5) is positioned between electro-optic crystal (3) and the beam expanding lens (7).
4, holographic photoelasticity instrument according to claim 1, it is characterized in that the beam system of forming by Fu Shi lens (12) and collimation lens (13) that contracts of connecting between to be measured (11) and the acousto-optic crsytal (15) in the holographic photoelasticity light path, or the Fu Shi lens (12) of between to be measured (11) and drum rotary type pen recorder (23), connecting.
5, holographic photoelasticity instrument according to claim 1, it is characterized in that acousto-optic modulator synchronized recording devices lattice, comprise two identical acousto-optic crsytals (15), (16), lens (17), an isochronous controller (19), holographic recording medium (18).
6, holographic photoelasticity instrument according to claim 1, the motor that it is characterized in that drum rotary type pen recorder (23) is a change speed motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86103974 CN86103974A (en) | 1986-05-30 | 1986-05-30 | Multi-frame dynamic holographic photoelastic meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86103974 CN86103974A (en) | 1986-05-30 | 1986-05-30 | Multi-frame dynamic holographic photoelastic meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86103974A true CN86103974A (en) | 1987-12-09 |
Family
ID=4802264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86103974 Pending CN86103974A (en) | 1986-05-30 | 1986-05-30 | Multi-frame dynamic holographic photoelastic meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86103974A (en) |
-
1986
- 1986-05-30 CN CN 86103974 patent/CN86103974A/en active Pending
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| C19 | Lapse of patent right due to non-payment of the annual fee |