One way to quite fill curvature is thus to place a negative element in the optical path. Such as balancing the effect of the positive elements. But, you have to place the lens as close as possible to the image plane to reduce its effect on the power of the system.
Here is an example, with a negative lens, placed close to the image plane. We see that the Rays focus at a longer distance because the negative lens optical center has decreased the power of the system. Making its focal length longer. But a nice effect of placing this lens is also that reduces. The effect of field curvature and ends MacDiarmid is sharper. At the edge of the sensor - and we finally Have the chromatic aberration. Chromatic aberration means that our system. Properties will depend on the color used in the elimination. Let’s another wavelength bar or chart. This is a previous system with a wavelength.
The cursor says to be bright, but if we move the cursor to blue, we see that the focus position gets closer to the lens. This focal shift can be high with a corrected system. The best shelf way to call it your system is by using an achromatic, doublet, or triplet element. You still have a focus shift with changing wavelength. But it's using much slower and banal disabled’s take care all over that the system will not be chromatic. Because you use an aquatic doublet in it, for instance, the following system is not chromatic. Because we are not collecting the two single elements at the center.
So that's the final design for the microscope aim. It is an Apache Optimized for the honor to sing that lets to reduce my collaboration. And a negative doublet to flatten the field curve later. If we summarize poverty as a microscope aim, we will say that it is a five-time magnification.
Because it has an equal focal length of 35 millimeters. It is a numerical aperture of 07. This expresses the light cone angle accepted by the aim, which is about a degree in this case. He is an infinite corrected aim because we have optimized auto aberration by using an input. Column 8 beam. It is a plumb aim because it has a limited field curvature. Moreover, we may say that there is a fair number of 22. Because that is the sensor size covered in the standard microscopy setup. So that aim still has high performance. In this case, that means we can study objects that are about 5-millimeter diameter largest. But it is, but, not a chromatic because it was not corrected for corroboration.
Okay, now that we understand our microscopy aim is working. Let’s assemble it and test its properties. Here are only the following items: the lens is available at to let's. But we will have to make the spacer and aperture or south. Don't worry. I've put the 3d models on the website. First, take the negative doublet and hold it. Between your turn and your index with the most fervid surface. On the top hat. On top of that, the 14-point 7-millimeter spacer and add one of the plans of contact lenses. With the convex side and top please the 1.