无聊瓜子
发表于 2006-8-24 06:29:00
The primary reason for using aspheric components is to eliminate spherical aberration<br/>(especially when there is a constraint on the number of optical surfaces and indices<br/>allowed). However, most designers still prefer to use spherical rather than aspherical<br/>surfaces. The reason has more to do with fabrication issues than anything else.<br/>Aspherics are much harder to make and measure. More time and skill are required<br/>of the optician and metrologist, thereby driving up costs. Consequently, the use of aspherics is limited to cases where (a) there is no other way, or (b) a trade-off study<br/>has shown it to be cost effective in the long run. Finally, it should be noted that the<br/>use of an aspheric does not change any of the first order design characteristics<br/>(cardinal points). All paraxial data remains the same.
docf
发表于 2006-8-25 03:48:00
<p>可以访问我们的网站</p><p><a href="http://www.lightpath.com">www.lightpath.com</a></p><p>我们现在就是做玻璃非球面透镜模压的。</p><p>可以联系：</p><p><a href="mailto:xfu@lightpath.com.cn">xfu@lightpath.com.cn</a></p><p></p>
cosinezheng
发表于 2006-8-25 22:56:00
玻璃透镜也能模压么。
吴量
发表于 2006-8-26 19:52:00
楼主提出这么高的要求，能说说想用来做什么吗？
hema_net
发表于 2006-9-12 19:22:00
<p>用Cylinder lens可以压缩，但是如果出来的光不是tem00，想给它弄成tem00的还是不行，用spatial filter能改善。</p><p>用棱镜也可以压缩或扩展，目前这种方法用的少。</p>
hema_net
发表于 2006-9-12 19:24:00
用zemax的physical optics就可以设计