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RSS1989 Vol. 13, No. 3
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1989, 13(3): 1-6.
[Abstract]
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Abstract:
This paper gives the basic principle of the moire deflectometry for mapping phase objects, discusses the sensitivity of this method, presents a simple and effective method for eliminating the imperfection of optical elements and show some experimental results.
This paper gives the basic principle of the moire deflectometry for mapping phase objects, discusses the sensitivity of this method, presents a simple and effective method for eliminating the imperfection of optical elements and show some experimental results.
1989, 13(3): 7-12.
Abstract:
An augmented 4×4 matrix for relatively misaligned optical systems is derived and analysed using coordinate transformation and matrix method. It has been shown that the augmented 4×4 matrix for optical systems which are misaligned but haven't relative misalignment can be simply obtained from the general expression.
An augmented 4×4 matrix for relatively misaligned optical systems is derived and analysed using coordinate transformation and matrix method. It has been shown that the augmented 4×4 matrix for optical systems which are misaligned but haven't relative misalignment can be simply obtained from the general expression.
1989, 13(3): 13-16.
Abstract:
This article presents our experimental procedure for the surface alloying of the 45 steel by a GW CO2 laser with various scanning speeds. After laser alloying treatment, the alloyed layer has been synthetically analysed on the distribution of elements in the alloyed layer, microstructure, distribution of hardness and wear resistance of the alloyed layer. The relation between the structures, properties of alloyed layer and laser scanning speeds has been presented.
This article presents our experimental procedure for the surface alloying of the 45 steel by a GW CO2 laser with various scanning speeds. After laser alloying treatment, the alloyed layer has been synthetically analysed on the distribution of elements in the alloyed layer, microstructure, distribution of hardness and wear resistance of the alloyed layer. The relation between the structures, properties of alloyed layer and laser scanning speeds has been presented.
1989, 13(3): 17-21.
Abstract:
By using optical path delaying set-up, the instantaneous process that a Q-switching YAG laser induces breakdown on solid surface is studied. Time-resolved shadowgrams and Mach-Zehnder interferograms of the initiation(within 200ns) of the shock-wave and plasma which is produced in this process are obtained firstly.plasma refractivity and electron density on the "shock-wave front are computed.
By using optical path delaying set-up, the instantaneous process that a Q-switching YAG laser induces breakdown on solid surface is studied. Time-resolved shadowgrams and Mach-Zehnder interferograms of the initiation(within 200ns) of the shock-wave and plasma which is produced in this process are obtained firstly.plasma refractivity and electron density on the "shock-wave front are computed.
1989, 13(3): 22-26.
Abstract:
This paper discusses the nonlinear effect and synthetic effect.In the SRS and the transmissivity for various wavelengthes, some computational results are given.
This paper discusses the nonlinear effect and synthetic effect.In the SRS and the transmissivity for various wavelengthes, some computational results are given.
1989, 13(3): 27-34.
Abstract:
We analyzed the typical parameters of the military laser systems.We started with a list of requirements that the ideal laser warning recever should meet, and evaluated the performance of the realistic laser warning receiver developmend by the west.
We analyzed the typical parameters of the military laser systems.We started with a list of requirements that the ideal laser warning recever should meet, and evaluated the performance of the realistic laser warning receiver developmend by the west.
1989, 13(3): 35-39.
Abstract:
According to the electro-magnefic field theory,the relation between the index of the optical thin film and the propagating direction of the light ray is given in this paper from the real structure of the optical thin film.The anisotropic indices of the thin films with high and low indices for various packing density are computed,and the computing results are discussed and analysed.
According to the electro-magnefic field theory,the relation between the index of the optical thin film and the propagating direction of the light ray is given in this paper from the real structure of the optical thin film.The anisotropic indices of the thin films with high and low indices for various packing density are computed,and the computing results are discussed and analysed.
1989, 13(3): 40-44.
Abstract:
Thrombus and aorta wall are radiated by excimer laser at 308 nm.It is showed that the excimer laser can be used safely and affectively in angioplasty without thermal injury of artery wall.
Thrombus and aorta wall are radiated by excimer laser at 308 nm.It is showed that the excimer laser can be used safely and affectively in angioplasty without thermal injury of artery wall.
1989, 13(3): 50-52.
Abstract:
The experiment results of the effect of ion implantation of F+ on the optical property of BaF2 film were reported. The change of transparent spectrum induced by ion implantation was observed, and it can be eliminated by annealing at certain temperature.
The experiment results of the effect of ion implantation of F+ on the optical property of BaF2 film were reported. The change of transparent spectrum induced by ion implantation was observed, and it can be eliminated by annealing at certain temperature.
1989, 13(3): 52-56.
Abstract:
In the paper the method is presented that measures the thickness of transparent medium by means of technology of the scattered laser-spot. The relationship between the thickness of test sample and the laser-spot replacement is turned out, the error of the measurement is discussed and the experimental results are compared with that of the mechanical method.
In the paper the method is presented that measures the thickness of transparent medium by means of technology of the scattered laser-spot. The relationship between the thickness of test sample and the laser-spot replacement is turned out, the error of the measurement is discussed and the experimental results are compared with that of the mechanical method.
1989, 13(3): 57-59.
Abstract:
The structure of inserted fiber-optic coupler for the medical Nd:YAG laser system is introduced and some problems on the mechanical design and adjusment of the fiber-optic coupler are discussed in this paper.
The structure of inserted fiber-optic coupler for the medical Nd:YAG laser system is introduced and some problems on the mechanical design and adjusment of the fiber-optic coupler are discussed in this paper.
1989, 13(3): 60-61.
Abstract:
1989, 13(3): 62-64.
Abstract:
Applying the rate equations to a train of strong pulses through a travelling-wave semiconductor laser amplifier(TWA) a simple first-order differential equation has been derived to determine the output pulse or the singal gain of the TWA. Meanwhile, the carrier densities before any one pulse arrives at the gain medium and after the pulse leaves the TWA can easily be obtained.
Applying the rate equations to a train of strong pulses through a travelling-wave semiconductor laser amplifier(TWA) a simple first-order differential equation has been derived to determine the output pulse or the singal gain of the TWA. Meanwhile, the carrier densities before any one pulse arrives at the gain medium and after the pulse leaves the TWA can easily be obtained.
