求翻译：光全息术的问世至今已有半个世纪的历程尤其是世界第一台激光器诞生以来，光全息术的发展更是引人注目，其应用领域尤为广泛，其中之一就是制作全息光栅。由于光栅上的纹路是干涉条纹，所以条纹均匀，无鬼线、象散、杂散光少、分辨率高，消除机刻光栅的固有缺点 。此外，光谱仪则是光学上一件非常常用的仪器，它的应用非常广泛，然而怎样获得比较精确地光谱却有很大的技术问题，采用光栅技术将能获得更精确地光谱。是什么意思？

正在翻译，请等待...

The advent of the holographic technology to date has been a half a century of history in particular is the world's first desktop laser, since the birth of the holographic technology development is even more impressive, it was used extensively in the field, one of which is holographic grid production

Optical holography has been around for half a century of history, especially since the birth of the world's first laser, optical holography is the development of compelling, its field of applic