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	Key techniques of laser direct writing of fine lines on the spherical surface (EI CONFERENCE) 会议论文 OAI收割 ICO20: Optical Design and Fabrication, August 21, 2005 - August 26, 2005, Changchun, China Liang F.; Hu J. 收藏 \| 浏览/下载：21/0 \| 提交时间：2013/03/25 The main principles of laser direct writing (LDW) system for lines on the spherical surface (SS) are discussed. It is pointed out that line profile is determined by the exposure dose distribution which lies on the light intensity distribution of focus plane and the scanning speed. To improve the quality of line profile on the SS several key techniques as follows are introduced. Firstly the unique system configuration four axes mutually intersecting at the center of the SS is adopted which ensures the shape of the focus be maintained circular during the writing period. Secondly an automatic focus system (AFS) with the function of automatic focus in a certain range is introduced. Thirdly to guarantee the linear velocity to accord with the exposure character of the photoresist all the time an efficient arithmetic that controls motors run at appropriate angular velocity in different latitude is developed. Finally to achieve a stable and well-behaved system so as to compensate the velocity instability resulting from unavoidable errors of mechanical and electronics factor a powerful programmable multi-axis controller (PMAC) is utilized as the kernel element of the servocontrol system and the curves of step response and parabolic response achieved by feedforward and PID loop tuning indicate that the location precision and velocity stability have reached a high level. The experimental results of LDW of lines on the SS work piece with a diameter 30 mm and a radius equal to 100 mm are given. The section analysis of the lines on the photoresist by the atomic force microscope (AFM) after exposure and development is performed. The results show that line width is about 3.0 m and the steep sides of the lines are parallel to each other.
	The replacement of dry heat in generic reliability assurance requirements for passive optical components (EI CONFERENCE) 会议论文 OAI收割 ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005, Changchun, China 作者: Zhang G.; Zhang G.; Zhang G. 收藏 \| 浏览/下载：23/0 \| 提交时间：2013/03/25 According to Generic Reliability Assurance Requirements for Passive Optical Components GR-1221-CORE (Issue 2 January 1999) reliability determination test of different kinds of passive optical components which using in uncontrolled environments is taken. The test condition of High Temperature Storage Test (Dry Test) and Damp Test is in below sheet. Except for humidity condition all is same. In order to save test time and cost after a sires of contrast tests the replacement of Dry Heat is discussed. Controlling the Failure mechanism of dry heat and damp heat of passive optical components the contrast test of dry heat and damp heat for passive optical components (include DWDM CWDM Coupler Isolator mini Isolator) is taken. The test result of isolator is listed. Telcordia test not only test the reliability of the passive optical components but also test the patience of the experimenter. The cost of Telcordia test in money manpower and material resources especially in time is heavy burden for the company. After a series of tests we can find that Damp heat could factually test the reliability of passive optical components and equipment manufacturer in accord with component manufacture could omit the dry heat test if damp heat test is taken first and passed.
	AN INTERPRETATION OF THE FORMATION OF SELF-QUENCHING STREAMER 期刊论文 OAI收割 Science Bulletin, 1986, 期号: 8, 页码: 515-519 作者: Zhang LS(张良生) 收藏 \| 浏览/下载：9/0 \| 提交时间：2015/12/21 gated explain chamber quenching generalization simplified anode accord determ dense