国产免费AV片在线观看下载,色综合视频一区二区三区44,国产亚洲精品线观看动态图,国产精品亚亚洲欧关中字幕,欧美变态另类牲交,男女裸交高潮无遮挡免费观看,99久在线国内在线播放免费观看,大地资源二在线观看免费高清,午夜AV无码福利免费看网站,欧美在线亚洲

CN  |   EN
Chinese English

Product

/static/upload/image/20240628/1719556748133030.jpg

Image lens

Lens Group
Bofei optics can design and customize various lenses such as eyepieces and objective lenses according to your needs.
Consult

Product Description

Optical lens is a visual optical device used to observe the image formed by the front optical system. It is a component of visual optical instruments such as telescopes and microscopes, and its main function is to enlarge the real image obtained by the objective lens again. To eliminate aberrations, optical lenses are usually composed of several lenses, which have a large field of view and magnification.

Previous: No Data