The size of the field lens

Each has a match field, what is a condition, what is the difference between the size of the field lens? Today ZuoLong mechanical small make up to you a simple introduction.

field lens: also called flat field focus lens, scanning lens, F - Theta mirrors. Mainly used in the galvanometer out light focused on a plane. When buying note that marking range, according to their own need to be sure, don't blindly pursuing big. Optical fiber and semiconductor wavelength is 1064 nm, the field lens is generally can be general. But sometimes if you are using imported from scanlab galvanometer, its field lens connection ring may not be M85 * 1, and field lens are generally M85 * 1 thread, this time with a field lens transformation connecting ring.





is the main purpose of field lens:

1, improve the ability of edge beam incident to the detector;

2, make the probe to the homogenization of non-uniform illumination on the surface of the photosensitive;

3, in the same main optical systems, additional field lens will reduce the area of the detector; If you use the same detector area, can expand the field of view, increase the incidence of flux;

about wide many customers want to buy a large-format field lens, because he want to consider this product to a large, thought their products may be more big, next time maybe need more wide, in order to long-term interests, so buy a large-format. But you forget a problem, the more wide field lens, then the corresponding field lens focal length and the greater the working distance. The longer the focal length, the greater the focus of light will, is the same on bigger spot area, the distribution of energy density becomes necessarily leads to marking depth is very shallow.

as we all know, the energy attenuation in the air is very bad, that is to say, the field lens focal length, the greater the energy losses, the greater the so out of line is thick, and the more shallow. So the moment the dimension of a mirror must choose the right line, don't blindly pursuing big.