## 优先发表

, doi: 10.3788/IRLA20200018
[摘要](31) [HTML全文](15)

, doi: 10.3788/IRLA20200181
[摘要](32) [HTML全文](23)

, doi: 10.3788/IRLA20200171
[摘要](31) [HTML全文](23)

, doi: 10.3788/IRLA20200098
[摘要](637) [HTML全文](573)

, doi: 10.3788/IRLA20201025
[摘要](35) [HTML全文](39)

, doi: 10.3788/IRLA20200216
[摘要](34) [HTML全文](28)
Turbocharger and gearbox were widely used in the precision machinery manufacturing industry. The dimensional accuracy of Turbo parts and stud standard parts was an important guarantee for the assembly accuracy of Turbo parts and gearbox, among which coaxiality was a key parameter for the dimensional accuracy of Turbo parts and stud standard parts. According to the demands of coaxiality measurement for turbine components and stud standard parts, a set of checking fixture was developed, and a software based on LabVIEW was built for the measurement. The coaxiality of stud standard M12 was measured by experiment and the uncertainty of measurement was evaluated. The experimental results show that the coaxiality error obtained from the four measurements is 6.3–6.5 μm, and the extended uncertainty reaches 2.6 μm. The results show that the developed coaxiality measurement system is suitable for the high precision measurement of the coaxiality of turbine parts and stud standard parts.

, doi: 10.3788/IRLA20200061
[摘要](53) [HTML全文](48)

, doi: 10.3788/IRLA20200140
[摘要](28) [HTML全文](33)

, doi: 10.3788/IRLA20190568
[摘要](2800) [HTML全文](731)

, doi: 10.3788/IRLA20190535
[摘要](29) [HTML全文](25)

, doi: 10.3788/IRLA20190532
[摘要](20) [HTML全文](25)

, doi: 10.3788/IRLA20200204
[摘要](19) [HTML全文](17)

, doi: 10.3788/IRLA20200032
[摘要](22) [HTML全文](19)

, doi: 10.3788/IRLA20200127
[摘要](24) [HTML全文](19)

, doi: 10.3788/IRLA20200040
[摘要](19) [HTML全文](24)

, doi: 10.3788/IRLA20200150
[摘要](9) [HTML全文](31)

, doi: 10.3788/IRLA20200088
[摘要](1164) [HTML全文](468)

, doi: 10.3788/IRLA20200084
[摘要](352) [HTML全文](267)

[摘要](36) [HTML全文](51)

, doi: 10.3788/IRLA20200111
[摘要](958) [HTML全文](416)

, doi: 10.3788/IRLA20200043
[摘要](444) [HTML全文](304)

, doi: 10.3788/IRLA20200045
[摘要](16) [HTML全文](20)

, doi: 10.3788/IRLA20200083
[摘要](974) [HTML全文](433)

, doi: 10.3788/IRLA20200053
[摘要](1110) [HTML全文](560)

, doi: 10.3788/IRLA20200057
[摘要](817) [HTML全文](712)

, doi: 10.3788/IRLA20200017
[摘要](578) [HTML全文](538)
Phase retrieval is to recover the original phase information by using the intensity information obtained from observation. Transport of intensity equation (TIE), as a traditional non-interference phase retrieval technique, can compute the losing phase information from only a minimum of two intensity measurements at closely spaced planes by solving the equation. This method usually requires the acquisition of intensity images by moving the object to be tested or CCD, which inevitably results in mechanical errors. A new phase retrieval method called chromatic dispersion-hybrid phase retrieval(CD-HPR) is proposed. The object is imaged at the same position by setting different wavelengths of light after passing through the single-lens system, in-focus and defocus intensity images are obtained without mechanical movement, and the initial phase information of an object is calculated from the phase retrieval technique based on TIE by combining the relationship between the defocus amount and the wavelength. Next angular spectrum iteration is used to improve the initial phase information. In this simulation, the RMSE between the phase recovered by this method and the original phase is 0.1076. At the same time, the phase of the lens array was restored by experiment. The error between the experimental result and the real parameter is 3.4%, which proves the correctness and effectiveness of the proposed method. This method extends the limitation of the traditional method that requires the light source to be monochromatic and improves the calculation accuracy.

[摘要](2816) [HTML全文](789)

[摘要](4690) [HTML全文](1465)

, doi: 10.3788/IRLA202049.20200038
[摘要](612) [HTML全文](1769)

[摘要](16) [HTML全文](33)

[摘要](2792) [HTML全文](736)
Picosecond infrared multi-wavelength Raman generator which adopted multi-pulse pumped KGW scheme was reported. A mathematical model was developed to investigate the effect of multi-pulse burst pumping regime on the vibrational mode of the Raman active molecule. The simulated results show that the response oscillation of the Raman active molecule to the multi-pulse burst pumping regime is more active and durable compared with the traditional single pulse pumping regime, which promotes the weakened molecule oscillation to return the natural frequency multiple times. The enhancement effect is beneficial to improve the Raman gain, reduce the Raman threshold, and increase the Raman conversion efficiency. During the experiment of picosecond multi-pulse pump KGW Raman crystal, the three-pulse burst pumping regime improves the Raman gain more than two times, reduces the threshold of stimulated Raman scattering more than 50%, and increases the Raman conversion efficiency more than 16% for 768 cm–1 Raman mode and 22% for 901 cm–1 Raman mode. Based on the three-pulse burst pumping regime, a 1 kHz mJ-level picosecond infrared multi-wavelength Raman generator was designed, which achieved the pulse energy of 1.39 mJ, the maximum Raman conversion efficiency of 29.6% for the 768 cm–1 vibrational mode of KGW, and the pulse energy of 1.38 mJ, the maximum Raman conversion efficiency of 25.7% for the 901 cm–1 vibrational mode of KGW. In addition, the Raman laser can radiate up to eight infrared Raman lines simultaneously for both the two vibrational modes of the KGW crystal, which covers the range of 800–1 700 nm.

[摘要](3867) [HTML全文](2028)

[摘要](5015) [HTML全文](2181)

[摘要](14) [HTML全文](34)
In view of the thermal damage law and mechanism of monocrystalline silicon for millisecond pulsed laser, the temperature of monocrystalline silicon irradiated by millisecond pulsed laser is measured by high precision point temperature meter and spectral inversion system. Then the temperature evolution process is analyzed. Also, the temperature state during the whole process of thermal damage of monocrystalline silicon irradiated by millisecond pulsed laser and the corresponding damage structure are studied. The results of this study show that the peak temperature of laser-induced monocrystalline silicon increases with the increase of energy density when the pulse width is fixed, When the pulse width is between 1.5 ms-3.0 ms, The temperature decreases with the increase of pulse width. Temperature rise curve shows inflection point when it is close to the melting point (1687 K), the reflection coefficient is from 0.33 to 0.72. During the gasification and solidification stages, it also shows the gasification and the solidification plateau periods. Thermal cleavage damage of monocrystalline silicon precedes thermal erosion damage. Stress damage dominates under low energy density laser irradiation, while thermal damage dominates under high energy density laser irradiation. The damage depth is proportional to the energy density and increases rapidly with the increase of the number of pulses.

[摘要](6189) [HTML全文](1388)

, doi: 10.3788/IRLA20200060
[摘要](400) [HTML全文](344)

, doi: 10.3788/IRLA20200036
[摘要](498) [HTML全文](412)

, doi: 10.3788/IRLA20200022
[摘要](899) [HTML全文](851)

[摘要](1705) [HTML全文](936)

, doi: 10.3788/IRLA20200007
[摘要](411) [HTML全文](328)

, doi: 10.3788/IRLA202049.20200030
[摘要](917) [HTML全文](986)

, doi: 10.3788/IRLA202049.20200005
[摘要](914) [HTML全文](816)

, doi: 10.3788/IRLA202049.20200003
[摘要](613) [HTML全文](494)

, doi: 10.3788/IRLA202049.20190559
[摘要](868) [HTML全文](661)

[摘要](4310) [HTML全文](1162)