【AddTime：2015-08-28 14:41:19】【From：】【Author：dggtangli】【Views：】
in some optical instrument products, often see the spectral bandwidth or the type of slit is written as “ continuous adjustable &rdquo. Then a closer look: in fact, a few files fixed slit type.
this slit is generally divided into a number of fixed width file, but not to be adjusted more is not continuous, just “ optional ”.
real continuous adjustable slit as shown below. Two edges of the slits, a fixed, the other one can move around to change the width of the slit (bandwidth).
fixed the advantages of optional slit: bandwidth will not change, good repeatability.
fixed the shortcomings of the optional slit: the narrow slit width limit die, can not be flexible use; in particular, as the infrared servo type variable width slit is not competent.
continuous adjustable slit of the advantages: the use of the width of good flexibility; can be used as a servo type applications.
can be adjusted by a continuous adjustable slit: the same slit width is set at the same time, the width of the repeat accuracy is difficult to guarantee. To ensure the accuracy of the bandwidth, it is to be set to zero (Onm), and then adjust to the default width, more complicated.
< br / > the reason some instrument manufacturers products indicators will be confused and talk, one is concept is not clear, it is inevitable that there was a deliberate suspected of perpetrating a fraud of the.