What are the slit processing methods?

Slit is one of the main components of spectrometer.A slit is a narrow slit of adjustable width.There are fixed slit, unilateral adjustable asymmetric slit and bilateral adjustable symmetrical slit.Each spectral line after the optical radiation is dispersed by the spectrometer is an image of the incident slit.The radiation force entering or exiting the monochromator is regulated by the width of the slit.In modern spectrometers, the slit is coupled with the rotation of the grating and can be adjusted automatically.The width of the slit is in units of 2m and up to 2mm in height.

The following methods are used to make the slit:

One, simple processing

Wire cut: this process of processing the slit, the slit surrounding some defects.Because the wire cutting will produce some oil, etc., need to be cleaned later, clean to clean.In addition, because the speed of wire cutting directly affects the vertical edge of the seam straightness, so try to use the use of slow wire processing.The connecting part between the lower knife and the retraction knife at the key point needs polishing of the hair thorn in the later stage.Relatively low efficiency, and for some ultra-thin material processing, not very suitable.The gap width of linear cutting is generally above 0.2mm, which cannot meet the requirements for a high precision slit. 

Second, laser processing with difficulty

Laser slits are more efficient than linear slits.But there are also some shortcomings of cutting processing, such as: cutting and cutting edge edge processing.Since the laser burns and cuts materials through light and temperature, it is easy to leave residue around the seam. The color of the residue is black, and it is difficult to clean up.Laser-machined seams can be as small as 0.1mm, or smaller.However, after N times magnification, the existence of wavy lines is a larger defect.In addition, laser-machined slits are easy to change the properties of materials through high temperature, which can easily affect the materials of some special materials. 

Third, alternative: etching processing

Etch processing slit at present few, and to achieve the micron level of processing enterprises are even fewer.Zolida etching processing slit is made of stainless steel, copper and other metal materials, and the thickness of the material also limits the small gaps that can be processed by this process.Zolida currently USES 0.03mm thick material to process small gaps of 0.05mm.If the seam width is increased, the choice of material thickness is wider.For example, if 0.2mm seam is processed, the material thickness can be used from 0.03 to 0.1mm.Convenient for the assembly and fixation of the slit in the later period.Zolida processing slit accuracy up to +/-0.005mm, is also the current spectrometer equipment better components.The slit after cutting processing alone can be blackened on the whole board, greatly improving the utilization rate of products and production efficiency.

Four, electron beam processing

Electron beam processing has the advantage of being able to process a very small slit. There are a variety of materials, both metallic and non-metallic.However, electron beam processing is quite difficult, and the cost is many times higher than the first three, the cost performance is very low.Because the process can be machined to a few microns of slit, the range of applications is also small, mainly for high-end market products. 

Adjustable slit

As the name implies, it is to make two pieces with very neat edges and use tools to make a slit with adjustable width.

Zolida can process 5 micron slit, 10 micron slit, 15 micron slit, 20 micron slit, 25 micron slit, 30 micron slit, 35 micron slit, 40 micron slit, 50 micron slit and so on.If you need to make slit products, or you need to know the slit processing process and principle, please contact us at 0513-81601668