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长春光学精密机械与物... [3]
内容类型
会议论文 [3]
发表日期
2009 [3]
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发表日期:2009
内容类型:会议论文
专题:长春光学精密机械与物理研究所
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Rigorous vector analysis of diffractive microlens by using of finitedifference time-domain method (EI CONFERENCE)
会议论文
2009 International Conference on Optical Instruments and Technology, OIT 2009, October 19, 2009 - October 22, 2009, Shanghai, China
Liu Y.
;
Liu H.
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浏览/下载:21/0
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提交时间:2013/03/25
We use finite difference time domain (FDFD) method as rigorous vector analysis model to simulate the focusing process of diffractive microlens (DML). Differing with most analysis model which the near field distributions are calculated by FDTD and then far field are obtained by using of propagation method
we obtain the fields in whole computational space by using of FDTD only. The advantages are that all the results are vector based and the computational time is saved greatly. In this paper
we present two methods to obtain wave amplitude
one is comparison method
and the other is integral method. Depending on wave amplitude in the whole computational space
one can conveniently obtain distributions of electric field intensity and calculate the time-average Poynting vector. We also present the formulation for calculating diffractive efficiency of DML based on time-average Poynting vector which denotes energy flow. As demonstration
a DML is analyzed by using of these algorithms. The time depended graphic results of FDTD show the process of wave propagation. The distribution of electric field intensity illustrates the focusing of the normal incident light. The focus pattern in the focal plane is also show. The diffractive efficiency of the DML is calculated by using of the energy flow method in this paper. The results show the high accuracy and efficiency of the model. 2009 SPIE.
Double-swing method used for polishing off-axis aspherical mirrors (EI CONFERENCE)
会议论文
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
Wang P.
;
Li J.-F.
;
Xuan B.
;
Chen X.-P.
;
Song S.-M.
;
Chen Y.
;
Xie J.-J.
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浏览/下载:29/0
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提交时间:2013/03/25
Based on the characteristics of off-axis aspherical surface
the comparison of simulation effects under different parameters is made. In order to achieve optimal parameters
a new method used for polishing off-axis aspherical mirrors-Double-Swing Method (DSM) is proposed in this paper
a high order off-axis rectangle aspherical mirror has been polished by DSM. The final result of profile measurements of 12nm
and the polishing mechanism of DSM is introduced. The mathematical model of the DSM with steady movement state is established.The movement of this mathematical model is simulated in a programming language
RMS is achieved. The result indicates that the method is of practice and has even higher working efficiency and precision. 2009 SPIE.
LED optical engine based on rectangular CPC for micro-projection display (EI CONFERENCE)
会议论文
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
Wang S.-Y.
;
Sun W.-J.
;
Bu W.-B.
;
Meng Z.
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浏览/下载:11/0
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提交时间:2013/03/25
With applications in digital display
consumer electronics
medicine
automotive lighting
traffic signals
and general illumination
the light-emitting diode (LED) is the world's most efficient light source being mass produced today[1]. However
high cost is the main factor restricting widespread application of LED lighting
and the packaging is the most expensive aspect of LED products. Light emitting diodes (LED) are regarded as the most important light sources in solid-state lighting for their advantages in energy efficiency
long life
vivid colors
high reliability
environmental protection
safety and multiple applications. However
application of LEDs in projection display exist many questions such as low illuminance uniformity and low energy efficiency by reason of luminescence distribution and constructure specificity for LED
the study on application of LED in the micro-projection display and projection display is reported[2-8]. Considering the question mensioned above the rectangular CPC(Compound Parabolic Concentrator) system with three-color LED is applied in the projection display. 2009 SPIE.
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