Contents
1985
Volume: 5 Issue 10
18 Article(s)
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Research Article
Holography
Deep-scence 3-D imaging technique of L-S-L system in astigmatic one-step rainbow holography
LIU SHUHUI, and LI ZHIMING
Using an L-S-L imaging system in astigmatic one-step rainbow holographic process, we obtained rainbow holograms of a set of objects with depth of 20cm and departure from holographic plate about 50cm. When the primary image was reconstructed with a white light point source, a clear, distortionless, highly stereoscopic aUsing an L-S-L imaging system in astigmatic one-step rainbow holographic process, we obtained rainbow holograms of a set of objects with depth of 20cm and departure from holographic plate about 50cm. When the primary image was reconstructed with a white light point source, a clear, distortionless, highly stereoscopic and orthoscopic quasimonochromatio deep-scene 3-D image was displayed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 886 (1985)
Instrumentation, Measurement and Metrology
Measurement of subnanosecond fluorescence lifetimes by deconvolution
CHEN WENJU, LIN MEIRONG, and JIONG HONGLI
Fluorescence decay curves of Rh6G with different concentrations of KI in water were measured by using a photomultipler tube and a sampling oscilloscope. The response time of the system was in the order of nanoseconds. The observed fluorescence decay curves were convolutional results of the real decay curves and the insFluorescence decay curves of Rh6G with different concentrations of KI in water were measured by using a photomultipler tube and a sampling oscilloscope. The response time of the system was in the order of nanoseconds. The observed fluorescence decay curves were convolutional results of the real decay curves and the instrumental response curve. A combination of the phase plane method and iterative convolution method was used in making deconvolution to obtain the real fluorescence lifetimes. The minimum time resolution was found to be 130 picoseconds, that is, 3% of the FWHM of the instrumental response time..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 904 (1985)
Fresnel zone plate interferometer and its application in laser wavefront measurement
GU TIANQU, WU SHUDONG, and YU WENYAN
A new kind of interferometer-Fresnel zone plate interferometer-is described. It combines the advantages of both radial and lateral shearing interferometers, and thus simplifies the analysis of interferograms. This interferometer is a commonpath system. It can be used in the wavefront diagnosis of broad-band lasers and A new kind of interferometer-Fresnel zone plate interferometer-is described. It combines the advantages of both radial and lateral shearing interferometers, and thus simplifies the analysis of interferograms. This interferometer is a commonpath system. It can be used in the wavefront diagnosis of broad-band lasers and short pulse lasers. Properties of the interferometer are discussed and experimental results in laser wavefront diagnostics summarized..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 910 (1985)
Two-dimensional Hartmann quantitative test of an aspherical primary mirror (φ2.16m)
GAO BUliE, LI DEPAL, and PAN JANHUA
This paper deals with the two-dimensional Hartmann quantitative test of the largest hyperboloidal primary mirror made in China. It is the first of its kind carried out in this country. It provides geometrical energy concentration, spot diagram at best focus, contour map for the mirror and aberration coefficients of ZerThis paper deals with the two-dimensional Hartmann quantitative test of the largest hyperboloidal primary mirror made in China. It is the first of its kind carried out in this country. It provides geometrical energy concentration, spot diagram at best focus, contour map for the mirror and aberration coefficients of Zernike polynomial fitting wavefront. In addition, parameters of the real shape, i.e., real radius of its curvature (R) and function of eccentricity of a conic surface (e2) are given..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 916 (1985)
Lasers and Laser Optics
Injection locking of a XeCl excimer laser with pulse output energy of 1.3 J
CHENG XUSAN, Lou QIHONG, and WANG RENWEN
The injection locking of a XeCl excimer laser driven by a long transmission-line p ulse-forming network was achieved with an unstable optical resonator. The injection-locked output energy was 1.36J(18MW In peak power) with a linewidth of 8.9×10-3A and a beam divergence of 0.2 m rad. Parameters of the injection locThe injection locking of a XeCl excimer laser driven by a long transmission-line p ulse-forming network was achieved with an unstable optical resonator. The injection-locked output energy was 1.36J(18MW In peak power) with a linewidth of 8.9×10-3A and a beam divergence of 0.2 m rad. Parameters of the injection locking and synchronization characteristics of discharge are also discussed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 865 (1985)
Resonators with side reflectors
FANG HONgLIE
A slab laser can reduce the effect of thermal-optical distortions due to its intrinsic phase-conjugate properties. It is hence a good laser structure. A rod laser with its side surface polished has Similar properties, because it has a special kind of resonator with side reflectors. Modes of such resonator are analyzed A slab laser can reduce the effect of thermal-optical distortions due to its intrinsic phase-conjugate properties. It is hence a good laser structure. A rod laser with its side surface polished has Similar properties, because it has a special kind of resonator with side reflectors. Modes of such resonator are analyzed in this paper. The analytic results show that diffraction losses become smaller, and mode distributions become stronger in the central part of the end reflectors..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 870 (1985)
Relaxation oscillation of amplified spontaneous radiation pulse emitted from a single-mirror Cu/CuBr laser
WANG YONGJIANG, and XIA TIEJUN
The relaxation oscillation of the amplified spontaneous radiation pulses emitted from a single-mirror Cu/CuBr laser has been observed for the first time and the experimental characteristics of the relexation oscillation were obtained. In addition, the spatial and temporal distributions of the light pulse intensity of tThe relaxation oscillation of the amplified spontaneous radiation pulses emitted from a single-mirror Cu/CuBr laser has been observed for the first time and the experimental characteristics of the relexation oscillation were obtained. In addition, the spatial and temporal distributions of the light pulse intensity of the amplified spontaneous radiation were also measured and found to be oomparativel yuniform. The spatial coherence of the amplified spontaneous radiation was found to be better than that of the laser with the same lasant..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 876 (1985)
Study on the operation lifetime of an excimer laser
HU XUEJIN, ZHAO ZHENSHENG, LI ZHAOLIN, and CHE MINGYU
Long-term stable operations of XeCl exoimer lasers depend considerably on the depletion of HCl. Our experiments have shown that the lifetime of such device can be extended significantly by adding appropriate amount of cheap donor gas HCl into the laser chamber made of epoxy resin pipe. In this way, more than 1.3×1Long-term stable operations of XeCl exoimer lasers depend considerably on the depletion of HCl. Our experiments have shown that the lifetime of such device can be extended significantly by adding appropriate amount of cheap donor gas HCl into the laser chamber made of epoxy resin pipe. In this way, more than 1.3×106 pulses were obtained by once filling Xe and Ar and then replenishing HCl at several appropriate times. For a repetition rate of 5.3 pulses per second and single-pulse energy of 100 mJ the laser was still able to operate normaly after working continuously for 54 hours. The maximum single-pulse energy of the laser was 160 mJ. The influence of the content of HOI on the output characteristics of the laser was also studied..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 881 (1985)
Materials
Light diffraction from LiKSO4 single crystals
YANG HUAGUANG, and HUANG YUZHEN
Light diffraction patterns from LiKSO4 single crystals and their changes with temperature were observed. These crystals were also observed under an optical microscope. It is concluded that the optical phenomena described in Reference [1] are caused by optical twins which are arranged in phase gratings with wave vectorsLight diffraction patterns from LiKSO4 single crystals and their changes with temperature were observed. These crystals were also observed under an optical microscope. It is concluded that the optical phenomena described in Reference [1] are caused by optical twins which are arranged in phase gratings with wave vectors perpendicular to c axis in LiKSO4. Diffraction patterns show abrupt changes at 435℃, -73℃ and -84℃, caused by structural phase transitions at these temperatures..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 926 (1985)
Study on chalcogenide glasses as cores of infrared optical fibers
MAO XILAI, and YANG PEIHONG
Compositions and properties of some core materials based on S, Se, and Te have been investigated with their advantages and disadvantages compared. We adopted a method of purifying glass with results showing that some absorption bands (at 3μm, 6.3μm, 8μm etc.) were eliminated and the absorption band at 11μm was decreaseCompositions and properties of some core materials based on S, Se, and Te have been investigated with their advantages and disadvantages compared. We adopted a method of purifying glass with results showing that some absorption bands (at 3μm, 6.3μm, 8μm etc.) were eliminated and the absorption band at 11μm was decreased markedly on infrared transmitting carves..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 932 (1985)
Optical Design and Fabrication
Stressed mirror fabrication-a new technology for making off-axis section of a paraboloid
WANG JIANGUO, and PAN JUNHUA
We have used a method for making off-axis paraboloidal mirrors by means of elastic deformation. The principle is that after applying an appropriate set of forces to a mirror blank, the polishing process can remove the forces and make the surface deform elastioally into the desired off-axis paraboloid. We have made calcWe have used a method for making off-axis paraboloidal mirrors by means of elastic deformation. The principle is that after applying an appropriate set of forces to a mirror blank, the polishing process can remove the forces and make the surface deform elastioally into the desired off-axis paraboloid. We have made calculations of the stress and deformation for an off-axis Section of a paraboloid and have designed the special jig for applying the force with bars and springs. The experimental results are satisfactory, with a maximum surface deviation from the dsired surface of 1/4λ(λ=0.6328 μm) and a rms error of 1/15λ..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 937 (1985)
Physical Optics
Analysis of bandwidth characteristics in single-mode fiber couplers
YAO HUIHAI, and CHEN YIJIANG
Based on solving the coupled mode equation with coupling coefficients as functions of longitudinal distance, single-mode fiber couplers with variable spacing are introduced and their coupling characteristics discussed. We reach the conclusion that grade seperation couplers have optimum bandwidth after calculating varioBased on solving the coupled mode equation with coupling coefficients as functions of longitudinal distance, single-mode fiber couplers with variable spacing are introduced and their coupling characteristics discussed. We reach the conclusion that grade seperation couplers have optimum bandwidth after calculating various insertion losses. The method for realizing broad spectral bandwidth single-mode fiber couplers and the related design procedure are also proposed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 897 (1985)
Rapid Communications
Density pseudocolor encoding of black-white images by non-silver recording medium
HUANG WANYUN, WANG HONG, and WANG FENGYU
Non-silver recording medium has been used for density pseudocolor encoding of black-white images. This density pseudocolor encoding method and its applications in geology are described here in detail. The preparation of the recording medium and its characteristics and also discussed.Non-silver recording medium has been used for density pseudocolor encoding of black-white images. This density pseudocolor encoding method and its applications in geology are described here in detail. The preparation of the recording medium and its characteristics and also discussed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 858 (1985)
The pseudocoloring of an encoded phase-picture
ZHANG JINGJIANG, wAnG SHUYING, LIN DOHE, and PENG FANGLIN
This paper presents a new method for the pseudocoloring of an encoded phase-picture. It can be performed only with one white-black film and one step of encoding. process. The encoded film is transformed into a phaseencoded transparency, then it ig put on the input-plane of a white-light processor, and the density pseudThis paper presents a new method for the pseudocoloring of an encoded phase-picture. It can be performed only with one white-black film and one step of encoding. process. The encoded film is transformed into a phaseencoded transparency, then it ig put on the input-plane of a white-light processor, and the density pseudocolor image is obtained on the output-plane by spatial filtering of the Fourier spectrum. The theoretical explanation of this method has been made and it is in conformity with the experiments. This method has been used in the processing of the films of astronomy, remote-sensing, biology, and medicine, and good results have Toeen obtained..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 944 (1985)
Twist measurement of beat lengths of single-mode fibers
HUANG ZHAOMING, YAO SHOUQUAN, SHEN HONGYUAN, and ZHEN RUIRONG
Beat lengths of single-mode fibers were measured by determining the output polarization ellipticity εc of a circularly polarized beam of light incident on the twisted single-mode fiber diode laser and a 1.34μm Nd:YAP laser were used as monochromatic light sources. The advantage of this method is that preliminary determBeat lengths of single-mode fibers were measured by determining the output polarization ellipticity εc of a circularly polarized beam of light incident on the twisted single-mode fiber diode laser and a 1.34μm Nd:YAP laser were used as monochromatic light sources. The advantage of this method is that preliminary determination of the position of the major polarization axis is not needed and calculations of beat lengths become very simple..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 951 (1985)
A 2-J pulse avalanche XeCl excimer laser
Lou QIHONG, DING AIZHEN, DONG JINXING, and WEI YUNRONG
Based on optimization of parameters of an avalanche XeCl laser, we have obtained output pulse energy of 2J/1·atm by using low-inductance capacitors and the laser discharge power supply.Based on optimization of parameters of an avalanche XeCl laser, we have obtained output pulse energy of 2J/1·atm by using low-inductance capacitors and the laser discharge power supply..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 955 (1985)
Spectroscopy
Emission spectra of a1Δg(v=1)→X3Σ-g(v=0) transition of singlet molecular oxygen 1O2 produced by Hematoporphrin (HP) in solutions
ZHAO YONGJING, ZHANG ZHILIN, XU GENGWU, and LIN JUNXIU
Emission spectra of the a 1Δg(v=1)→X3Σg-(v=0) transition of the singlet molecular oxygen 1O2 produced by hematoporphrin(HP) in solutions of water, acetone and ethylalcohol were measured with Ar+ laser as the pumping light source. The relative phosphorescence intensity (relative value of the 1O2 quantum yield) was foundEmission spectra of the a 1Δg(v=1)→X3Σg-(v=0) transition of the singlet molecular oxygen 1O2 produced by hematoporphrin(HP) in solutions of water, acetone and ethylalcohol were measured with Ar+ laser as the pumping light source. The relative phosphorescence intensity (relative value of the 1O2 quantum yield) was found to depend on the pumping power, concentration of HP and pumping light wavelength. The quenching effect of ascorbic acid (injected as a quencher) on the singlet molecular oxygen was observed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 5, Issue 10, 891 (1985)
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