ovd

Design of printing system with needle-type grating head for OVD 'S

针式光栅头光学可变图像打印系统的设计

OVD process in optical fiber fabrication

光纤制备中的外汽相沉积工艺研究

The results show that the diffraction efficiency of transferred OVD can be higher than that of original shim .

对复制前后的光变图像光栅进行的测试表明，转移后光栅的衍射效率可以高于母光栅。

Graphics oriented design ( GOD ) is also proposed to realize achromatic OVD and the fabricated examples are also given .

此外，还提出了面向图形结构的非彩色OVD实现方案，并给出了实验结果。

In this article we introduce the manufacture methods , measurements , applications of Optical Variable Device ( OVD ) being based on our research working recently .

作者结合近几年的研究工作，介绍并探讨了光可变材料的研制方法，测试方法及应用。

The required thickness ( 0.6-0.8 μ m ) of SOS film is deposited by the standard OVD method on the thin silicon layer .

3）再用通常CVD方法在带薄硅层上外延生长所需厚度（0.6～0.8μm）的SOS膜。

The technology to make a large area master with the grating of optically variable device ( OVD ) is role in holographic image embossing .

制作具有光变图像（OVD）光栅条纹的大面积全息原版，是激光图像无油墨印刷的核心技术之一。

By analyzing the mathematical model of the OVD , its practical example is given , and it is very important to improve the efficiency of logistics distribution and reduce cost .

并在分析其数学模型的基础上，给出了实例分析，对提高物流配送效率和降低成本具有重要意义。

Optically Variable Device ( OVD ) is widely used in anti-counterfeiting with its beautiful color , abundantly variable optical effects and encryptions .

光学可变图像因其具有绚丽的色彩、丰富多变的光学效果、并可采用多种编码加密方案，被广泛应用于防伪领域。

To further increase system capacity and improve system performance , we have designed and fabricated non zero dispersion shifted large effective area fiber ( LEAF TM ) using the Outside Vapor Deposition ( OVD ) technique .

为了进一步提高系统容量和改善系统性能，我们利用外气相沉积（OVD）工艺，设计并制作了大有效面积非零色散位移光纤，称为康宁LEAFTM光纤。