An optical scanner can actually read characters and transfer them to the monitor screen of a computer.
光学扫描仪能读出字符，并将其转换到电脑显示屏上。
2
They now believe that graphene could be the foundation for optical communications that are at least 10 and maybe even 100 times faster than the fastest data transfer rates available today.
目前，他们认为石墨烯作为光通讯基础的话，速度可以比目前所能达到的最大传速快10倍乃至100倍。
3
The specific parameters of main optical system are deduced from the requirement of pattern transfer for the projection aligner. The limit of these parameters is discussed.