Contents
1984
Volume: 4 Issue 4
18 Article(s)
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Research Article
Fourier Optics and Signal Processing
Transfer chracteristic of motion image for delay imaging system
ZHU KEZHENG
This paper illustrates essentically the transfre process of a motion image for the delay imaging system, and proposes a mathematical and physical models for deriving line spread function of motion image and its frequency spectrum. According to the model, the analytical expressions of the line spread function of an imagThis paper illustrates essentically the transfre process of a motion image for the delay imaging system, and proposes a mathematical and physical models for deriving line spread function of motion image and its frequency spectrum. According to the model, the analytical expressions of the line spread function of an image under uniform motion and simple harmonic motion aer derived. Their computational ersults are given and disccused..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 360 (1984)
Pattern recognition by means of power spectrum samples--examples of screening cancer cells of human lung
ZHANG YIMO, and HUANG ZHI
This article discusses the principle on which optical power spectrum is made use of identifying the same type of objects and gives an example of screening cancer cells of the lung. In that case, Fourier transform system with long focal length and high power lens and method of linear decision are proposed. A hybrid systThis article discusses the principle on which optical power spectrum is made use of identifying the same type of objects and gives an example of screening cancer cells of the lung. In that case, Fourier transform system with long focal length and high power lens and method of linear decision are proposed. A hybrid system of optics and computer which controls spectrum sample and completes statistical decision has been composed. The automated screening abnormal cells has been realized..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 368 (1984)
Instrumentation, Measurement and Metrology
A lithographic optical system having only one symmetric plan
WANG ZHIJING, LI YUANKANG, and JIANG JIANZHONG
Optical system having only one symmetric plan is difficult to correct aberrations. We consider the imaging properties of ellipsoid near the focus and of concentric spheric surface,, and appropriately combine it. An optical system having field diameter 50~ 70mm, N. A. 0.15-0.1, and imago qualities near diffraction limitOptical system having only one symmetric plan is difficult to correct aberrations. We consider the imaging properties of ellipsoid near the focus and of concentric spheric surface,, and appropriately combine it. An optical system having field diameter 50~ 70mm, N. A. 0.15-0.1, and imago qualities near diffraction limit is obtained..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 322 (1984)
Preliminary investigation on N2 thermometry by CARS technique
XU ZHAOSHUN, LI YUFEN, JIN YAOGEN, and DONG GENFA
Experimental arrangement for OARS (Coherent anti-Stokea Raman Speotrosoopy) thermometry has been established and preliminary results on N2 temperature measurement have been obtained. An approximate method for temperature determination by comparing the experimental and calculated OARS spectra was demonstrated.Experimental arrangement for OARS (Coherent anti-Stokea Raman Speotrosoopy) thermometry has been established and preliminary results on N2 temperature measurement have been obtained. An approximate method for temperature determination by comparing the experimental and calculated OARS spectra was demonstrated..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 325 (1984)
Measurement of high speed event using pulsed speckle interferometry
FENG SHIYU, GUO SIGAN, MA YINGYING, and ZHENG SHUNXUAN
This paper presents a new method, i. e., pulsed speckle interferometry, in the measurement of high speed event. To measure the velocity of objects moving at a speed as high as 100 m/s, the single pulse ruby laser beam is divided into double pulses beam by a splitter and by an optical delay line.This paper presents a new method, i. e., pulsed speckle interferometry, in the measurement of high speed event. To measure the velocity of objects moving at a speed as high as 100 m/s, the single pulse ruby laser beam is divided into double pulses beam by a splitter and by an optical delay line..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 331 (1984)
Characters of three plates cyclic interferometer and their application in microscopy
WANG ZHIJIANG, and CHEN SHOUHUA
Authors demonstrate that the three plates cyclic interferometer has a characteristic vector which determines all the behaviours of this interferometer. The value of this vector in some special cases has been derived. With this interferometer a new type of interference microscope has been proposed which may be superior Authors demonstrate that the three plates cyclic interferometer has a characteristic vector which determines all the behaviours of this interferometer. The value of this vector in some special cases has been derived. With this interferometer a new type of interference microscope has been proposed which may be superior to the polarized one used previously..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 336 (1984)
Lasers and Laser Optics
The formation efficiency and electron de-excitation rate constant for XeCl~* in X-ray preionized pulse avalanche discharge
LOU QIHONG
By using Stern-Volmer plot method, the formation efficiency nf and electron de-excitation rate constant Ke for XeCl* have been dertermined in a X-ray preionized pulse avalanche discharge. The results indicate that nf and Ke are 12.4% and 1.16? 10-7 cm3/sec respectively at the excitation rate of several MW/cm3.By using Stern-Volmer plot method, the formation efficiency nf and electron de-excitation rate constant Ke for XeCl* have been dertermined in a X-ray preionized pulse avalanche discharge. The results indicate that nf and Ke are 12.4% and 1.16? 10-7 cm3/sec respectively at the excitation rate of several MW/cm3..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 289 (1984)
A theoretical treatment of pulse optogalvanic effect
YIN LIFENG, HU QIQUAN, and LIN FUCHENG
An improved simple phenomenological theory of the optogalvanio effect in the hollow cathode lamp exciting by a pulsed laser is presented. A set of equations was obtained based on the population of the atomic levels and the rate equation of the electron density change and considering the electron movement in the discharAn improved simple phenomenological theory of the optogalvanio effect in the hollow cathode lamp exciting by a pulsed laser is presented. A set of equations was obtained based on the population of the atomic levels and the rate equation of the electron density change and considering the electron movement in the discharge tube and the current circuit equation. The dependence of optogalvanic signal on current and pressure of buffer gas and laser intensity and its temporal behavior are predicted by those equations. According to this theory^ it is possible to measure the same plasma parameters in low pressure gas by using pulse optogalvanic effect..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 294 (1984)
Statistics of the second threshold of passive mode locking
LV BAIDA, and H. WEBER
The statistics of passive mode locking is investigated theoretically and experimentally in detail for different dyes and resonator configurations with Nd: YAG or Nd-glass as active medium. Experimental results are compared with the theory. In the case of Nd-YAG the theory could be confirmed satisfactorily, whereas the The statistics of passive mode locking is investigated theoretically and experimentally in detail for different dyes and resonator configurations with Nd: YAG or Nd-glass as active medium. Experimental results are compared with the theory. In the case of Nd-YAG the theory could be confirmed satisfactorily, whereas the discrepancies between theory and experiment in the case of Nd-glass could be explained qualitatively..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 301 (1984)
Time-resolved spectroscopic studies of photo-initiated F2/H2 chain reaction chemical lasers
CHEN XIRONG, GE SHUJIE, WEI YUZHOU, and ZHANG CUNHAO
The effect of O2 on the number and IR intensity of lasing lines has been quantitatively studied for a pulsed F2/H2 laser. The sequence of appearance of each individual line in the lasing process is found to be quite regular with positive J-shift. Rotational nonequilibrium behavior is exibited on all v = 1~6 levels. TheThe effect of O2 on the number and IR intensity of lasing lines has been quantitatively studied for a pulsed F2/H2 laser. The sequence of appearance of each individual line in the lasing process is found to be quite regular with positive J-shift. Rotational nonequilibrium behavior is exibited on all v = 1~6 levels. The cascade effect is markedly shown for transition P6 (4) - P1 (9) and P6(6) -P1(11). These experiments are in good agreement with the predictions of our computer modeling..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 309 (1984)
Materials
Structure and vibrational spectra of glasses with multi-glassforming oxides
GAN FUXI, HUANG GOOSONG, and LIN FENGYING
In this paper the infrared spectra and Raman spectra of three series of glasses with multi-glassforming oxides havo been reported: I. SiO2, P2O5-SiO2, GeO2-SiO2 and P2O5-GeO2-SiO2. II. 15Na2O.15BaO.10RmOn.60SiO2.RmOn-B2O3, Al2O3, Ga2O3, SiO2, GeO2,TeO2, Nb2O5. III. 10%B2O3, GeO2, TeO2 gradually substituted SiO2 in 15NaIn this paper the infrared spectra and Raman spectra of three series of glasses with multi-glassforming oxides havo been reported: I. SiO2, P2O5-SiO2, GeO2-SiO2 and P2O5-GeO2-SiO2. II. 15Na2O.15BaO.10RmOn.60SiO2.RmOn-B2O3, Al2O3, Ga2O3, SiO2, GeO2,TeO2, Nb2O5. III. 10%B2O3, GeO2, TeO2 gradually substituted SiO2 in 15Na2O.15BaO.70SiO2 glasses. The spectral peaks in Raman and IR spectra and vibration bonds of glass structure have been illustrated. The different structural states of GeO2 and TeO2 in alkali and alkali-earth oxides contained and non-alkali and alkali-earth contained glasses are analysed. It is pointed out that the structure of Al2O3 contained glasses is homogeneous! and the structure of B2O3 contained glasses is inhomogeneous..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 339 (1984)
Study of acousto-optic properties for Ge-As-S glass system
MAO XILAI, and YANG PEIHONG
This paper studied systematically the physical and acousto-optic properties for Ge-As-S glass system. Experimental results show that the density, hardness, softening temperature, chemical durability etc. of these glasses increase with Ge contents in glasses. The thermal expansion coefficient of the glasses decreases wiThis paper studied systematically the physical and acousto-optic properties for Ge-As-S glass system. Experimental results show that the density, hardness, softening temperature, chemical durability etc. of these glasses increase with Ge contents in glasses. The thermal expansion coefficient of the glasses decreases with Ge contents in glasses. The fundamental absorption edge of the glasses shifts to longer wavelengths. Meanwhile, the acoustic attenuation of the glasses decreases with increasing Ge contents. The acoustic attenuation of glasses of the system is as small as quartz glass. When Ge(30)As(15)S(55) glass sample was used to carry out the experiment outside the laser cavity, diffraction effect of four or five grades was observed. However there isn't suoh a phenomenon in tbo same size quartz glass sample. So Ge-As-S glass system has excellent aoousto-optio properties. It is a prospective infrared aeousto-optio modulation material..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 348 (1984)
Rapid Communications
Bistable optical devices using branched optical waveguide
SUN YUNAN, and CHUNG BAOAN
This paper represents a bistable optical device (BOD) using Ti-diffused LiNbO3 branched optical waveguide modulator which is fabricated in authors laboratory. The steady characteristic is analyzed and calculated theoretically. From the experimental results, half wave voltage Vx =9.0 V and maximum modulation depth= 46% This paper represents a bistable optical device (BOD) using Ti-diffused LiNbO3 branched optical waveguide modulator which is fabricated in authors laboratory. The steady characteristic is analyzed and calculated theoretically. From the experimental results, half wave voltage Vx =9.0 V and maximum modulation depth= 46% are obtained. The calculated band width is about 5.5 GHz. The bistable hysteresis curves, critical curves, and the dull saturated curves are observed. They agreed well with the theoretical analyses and calculated results. The Improvements for this device are discussed..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 374 (1984)
Calculations of oscillator strengths of lithium-like isoelectronic sequence
SONG QINGFENG, and PAN SHOUFU
Oscillator strengths of low lying excited states of Be?, B?, C?, N?, O?, F? and Ne? lithium-like isoelectronio sequence are calculated in terms of spin pola-rizated Xa methods and the results agree with experimental data.Oscillator strengths of low lying excited states of Be?, B?, C?, N?, O?, F? and Ne? lithium-like isoelectronio sequence are calculated in terms of spin pola-rizated Xa methods and the results agree with experimental data..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 379 (1984)
Precise determination of refractive index at ultraviolet and infrared ranges
LIU NAITING, YAO ZHANG, ZHANG YOUMING, and ZHANG FENGMING
A method for measuring the minimum deviation angle and making the precise determination of refractive index of optical material from ultra-violet to infra-red is given. The region of wavelength are from 0.21 to 2.43μm. The dispersion formula of fused silica and CaF2 crystal have been evaluated. The measuring results coA method for measuring the minimum deviation angle and making the precise determination of refractive index of optical material from ultra-violet to infra-red is given. The region of wavelength are from 0.21 to 2.43μm. The dispersion formula of fused silica and CaF2 crystal have been evaluated. The measuring results coincide with the calculation very well. The measurements have been done by an instrument consisting of a reflective collimator and a GM-1 spectroscope. The accuracy is ±2×10 -5 when λ<2 μm and is a little lower when λ>2 μm..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 381 (1984)
Spectroscopy
A new method for directly displaying h. f. s. of atoms by laser-induced fluorescence
Zhou Rufang, Zhou Zhiyao, Ni Guoquan, and Cai Weiquan and Wang Yuzhu
In this paper, a detail description of a new method which could directly display the atomic hyperfine structures (hfs) in space is given and the observation of the two hfs of the 32P1/2 state of Na is reported. When a chipped divergent atomic beam interacts with a chipped divergent laser beam in space, atoms will be exIn this paper, a detail description of a new method which could directly display the atomic hyperfine structures (hfs) in space is given and the observation of the two hfs of the 32P1/2 state of Na is reported. When a chipped divergent atomic beam interacts with a chipped divergent laser beam in space, atoms will be excited to upper state and then emit fluorescence, if Doppler frequency shift equals the difference between the atomic transition frequency and the laser frequency. Both calculated and experimental results show that the fluorescence loci is an arc. The number of filuorescenoe bands indicated the number of tlie hfs, while the positions and the widths of fluorescence bands represent the splittings of the hfs and the velocity distribution of atoms in the atomic beam respectively. The fluorescence loot corresponding to the transitions from the 32s(1/2) state to tho 32p(1/2) state of Na have been studied. The photographs show two distinctly separated fluoresoenoa bands, and the interval between these two bands is in good agreement with the calculation..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 317 (1984)
Thin Films
Analysis of optimum laser anti-reflection coatings using vector diagram method
TAN SHUSHENG
The essential problem in producing two-layer non-quaterwave laser anti-reflection coating with minimum reflectance is pointed out in the paper. The difficulty is that the thicknesses of the lowest layers on different substrates can t be well controlled with the game accuracy because of the difference of surface states The essential problem in producing two-layer non-quaterwave laser anti-reflection coating with minimum reflectance is pointed out in the paper. The difficulty is that the thicknesses of the lowest layers on different substrates can t be well controlled with the game accuracy because of the difference of surface states in substrate. It is demonstrated with vector diagram method that the important way to solve the difficulty mentioned above is to add a layer so as to compose three-layer anti-reflection coating, of which the lowest layer has refractive index as approximate to the index of the substrate asi possible..
Acta Optica Sinica
- Publication Date: Jan. 01, 1900
- Vol. 4, Issue 4, 354 (1984)
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