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国产光学设备棱镜高效制造技术 总被引:2,自引:2,他引:0
棱镜制造技术采用刚性胶盘、靠体翻转加工和配以若干类特种粘接胶,在国产设备组成的高效生产线上一次性完成调整铣磨、高速精磨和高速抛光的全部加工。经过六年的实际生产检验,这项技术是成功的,经济效益是令人满意的。 相似文献
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介绍的棱镜高效制造技术工艺参数 ,是在使用国产光学加工设备的条件下依靠工装夹具的精度来保证棱镜的角精度 ,采用工装夹具上刚性盘和靠体翻转加工的方法来实现高效生产 ,由此确定的技术参数。并对高效加工的前期准备条件和要求 ,及为适应工艺要求而对机床进行的局部改进也进行了介绍 相似文献
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本文介绍了在YG366高速抛光机上进行的透镜不胶盘单件抛光技术。这一新的抛光方法比弹性成盘法和刚性成盘法有许多优点:它省掉了许多辅助工序,缩短了抛光时间,所以生产周期短,效率高,成本低。同时给出了根据透镜的结构参数进行生产技术准备和评估抛光过程稳定性的公式。最后提出了进一步改进的设想。 相似文献
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在大口径超精密平面光学元件加工中,环形抛光(简称环抛)是一种重要的抛光技术。由于抛光的过程复杂,并受很多因素影响,环抛加工技术一直未能取得有效突破,也未能形成稳定的生产能力。文中用主动轮方法精确控制校正盘和元件转速,进行抛光胶配比实验及新抛光胶盘的制作、抛光胶盘开槽改进、新制胶盘面形快速收敛、区域环境的控制改进、改变抛光液pH值控制胶盘老化等,以提高环形抛光的效率。 相似文献
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利用激光回馈测量波片相位延迟精度高的优越性,以激光回馈技术为基础,实现光学波片的在盘测量,即在加工过程中,波片光胶于光胶盘的状态下测量波片位相延迟,以提高波片生产效率和成品率。采用凹面镜作为回馈镜以提高回馈信号调制深度,对激光回馈内、外腔长进行稳定,提高了系统可靠性;研究了波片与光胶盘光胶对波片测量的影响,提出并验证了在光胶盘上开孔,在打孔的光胶盘上光胶、加工、测量波片的新工艺,最终实现了波片在盘测量,测量长期重复性优于1°,经过激光频率分裂系统校正后,系统精度优于0.5°。 相似文献
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本文从精磨模具的制造工艺、抛光模具的制造工艺、聚胺脂平盘的预制、胶盘方法和高速抛光胶的制做方法上主要叙述了定时、定光圈的高速精磨、高速抛光模具的制做方法。通过实践,达到了批量生产的定时、定光圈的要求。 相似文献
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Compared to the traditional wavelength division multiplexing (WDM) optical networks with rigid and coarse granularities, flexible spectrum optical networks have high spectrum efficiency, which can support the service with various bandwidth requirements, such as sub and super channel. Among all network performance parameters, blocking probability is an important parameter for the performance evaluation and network planning in circuit~based optical networks including flexible spectrum optical networks. We propose an analytical method of blocking probability computation for flexible spectrum optical networks in this letter through mathematical analysis and theoretical derivation. Two blocking probability models are built respectively based on whether considering spectrum consecutiveness or not. Numerical results validate our proposed blocking probability models under different link capacity and traffic loads. 相似文献
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In the present paper it will be shown how the introduction of a Fourier plane filter can create various types of common-path interferometers for measuring changes in surface tilt or curvature of an object surface. This is obtained by placing a holographic optical element in the Fourier plane of a 4-f optical system. The interferometers are analysed by using the paraxial approximation of the Huygens-Fresnel integral formalism, and the interferometer functions are given by a novel formalism using impulse response functions. Based on this technique, an interferometer for measuring dedicated changes in surface deflection is presented. This interferometer is insensitive to rigid surface rotations and displacements. The interferometer can be embedded in systems based on single point measurement of a time dependent deflection, i.e. vibrometers, as well as in full-field measurements such as electronic speckle interferometers.This paper was originally presented at the 2001 International Conference (2nd Joint OSJ-SPIE Conference) on Optical Engineering for Sensing and Nanotechnology, ICOSN 2001 which was held June 6-8, 2001 at the Pacifico-Yokohama Conference Center, Yokohama, Japan. 相似文献
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Based on the degree-of-polarization (DOP) measurement, an autocorrelation technique to measure the pulse width of chirp-free optical short pulse with a very low optical power (<?60 dBm) is demonstrated. The impacts of chirp and misalignment of the input light are also discussed in detail. The pulse width measurement results are consistent with the conventional second-harmonic generation (SHG) autocorrelation, while our autocorrelation technique does not require high input power or rigid optical alignment. 相似文献
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Flexible grid optical networks have been attracting much attention for their high spectrum efficiency (SE) and flexibility compared to the rigid grid WDM networks. As well known, the networks suffer from the problem of spectrum fragmentation under dynamic traffic. In this paper, we propose a new concept called ‘fragment fusion degree (FFD)’ to assess the level of spectrum fragmentation in flexible grid optical networks, which is calculated based on the availability of the spectrum fragments among neighboring links. Two FFD based dynamic defragmentation algorithms are presented to fuse the spectrum fragments among neighboring links. Simulation results show that the proposed defragmentation algorithms reduce blocking probability significantly and achieve high profitability. 相似文献
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Optical burst switching (OBS) has been considered as the gate through which the envisaged world of optical Internet will be conquered by implementing Internet Protocol (IP) software directly over a wavelength-division-multiplexing (WDM) optical layer (IP/WDM). The main feature for designing next generation optical networks is protecting and restoring high capacity WDM networks from the failures. Quick detection, identification and restoration make networks more strong and consistent even though the failures cannot be avoided. Hence, it is necessary to develop fast, efficient and dependable fault localization or detection mechanisms. In this paper, an efficient scheme for OBS networks has been proposed to provide fast restoration of links with minimum delay as well as blocking probability. By simulation results, it is shown that the proposed OBS scheme achieve less blocking probability and delay while getting higher throughput in comparison to conventional schemes. 相似文献
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厚度相差很大的光学零件,加工时应力容易集中到最薄的地方,对零件的加工存在着很大困难,针对所加工零件的特点选择正确的加工方案至关重要。采用浇注刚性补偿法加工中心厚度与边缘厚度比值为2.7:13,且不对称的特殊光学零件,取得了较好的效果。 相似文献
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Martin Sagmeister Bernhard Lamprecht Elke Kraker Stefan Köstler Volker Ribitsch Nicole Galler Harald Ditlbacher Joachim R. Krenn Birgit Ungerböck Tobias Abel Torsten Mayr 《Applied physics. B, Lasers and optics》2013,111(4):647-650
We demonstrate screen printing of polymer waveguides on rigid and flexible substrates. The waveguides are characterized by optical microscopy and propagation losses are determined by cut-back measurements. Furthermore, the efficiency of light coupling using fluorescent molecules within the waveguides is measured with regard to the application feasibility in sensor systems. It is shown that minimum propagation losses of 0.74 dB/cm can be reached with this low-cost printing technique. 相似文献
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Differential output-ports choosing probability (DOCP) scheme is a novel traffic outputting model for core router in optical burst switching (OBS) network. In this paper, we provide an analytical model for studying the performance of traffic blocking and delay in DOCP-applied OBS network. We first evaluate blocking probabilities using DOCP and confirm it by simulation. Then, in optical buffer-equipped OBS core router, we consider the average delay time for buffered traffic and the average total traffic queueing length in core router. The knowledge of delay performance is useful for the optical buffer architecture configuration in differential traffic scenario. Several results indicate that, under the same load condition, the blocking probabilities and the delay time will change along with the changeable ports choosing probability and the ratio between different length bursts in the OBS system. 相似文献
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本文报告了隐埋双脊衬底大光腔结构GaAlAs/GaAs激光器的制备和特性,获得CW光输出的最高功率可达80mW。 相似文献