By P. Das (auth.)
A textbook on lasers and optical engineering should still contain all points of lasers and optics; even though, this can be a huge project. the target of this ebook is to offer an creation to the topic on a degree such that less than graduate scholars (mostly juniors/seniors), from disciplines like electric engineering, physics, and optical engineering, can use the e-book. to accomplish this target, loads of uncomplicated heritage fabric, significant to the topic, has been coated in optics and laser physics. scholars with an easy wisdom of freshman physics and without formal classes in electromagnetic concept will be capable of keep on with the e-book, even supposing for a few sections, wisdom of electromagnetic idea, the Fourier rework, and linear structures will be hugely necessary. There are very good books on optics, laser physics, and optical engineering. really, such a lot of my wisdom was once bought via those. in spite of the fact that, while i began educating an undergraduate path in 1974, less than a similar heading because the name of this ebook, I needed to use 4 books to hide the cloth i assumed an electric engineer wanted for his advent to the realm of lasers and optical engineering. In my sabbatical 12 months, 1980-1981, i began writing classification notes for my scholars, so they may possibly get in the course of the direction by means of potentially paying for just one publication. finally, those notes grew with assistance from my undergraduate and graduate scholars, and the ultimate result's this book.
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Extra resources for Lasers and Optical Engineering
1. Image Formation by a Thin Lens in Air As the object and the image are in air, this example of image formation simplifies significantly. 3. Image Formation 19 a=sl I---u f Fig. 5. Image formation through a lens. u = object distance, v = image distance, = size of the object, and Xl = size of the image. Xl shown in Fig. 5. A ray is traced through the optical system, its different values at different points on the optical axis are denoted by Xl and X 2 , respectively, X 2 = T(v)M(f)T(u)Xl =(~ ~)(-~/I ~)G ~)GJ = (1 -III - vii u - uvll + V)(Xl).
Using the previous example of Fig. 1 U1 = 15 em, 12 = Il=5em, we obtain d = 12 em, 10 em, feq = 16j em, D = -20, D' = -40. o 1 1 1 1 1 D~------t-40cm ---------t---, I , I 1 i: 28cm 1 l\b --,--- I : I.. ~---- I 1 ~:----L 1 f,q=16 2/ 3 1 ~........ 1 1 1 I 1 : 1(;;\ ,-1 1 1 I cm 1 I : 1 1 1 I.. 1 1 Fig. 4. Image formation due to two thin lenses. 5. The Telescoping System Thus, S = U1 - D 29 = 15 - (-20) = 35, 1 S' 1 1 S' feq , 350 S =0' , U2 , 350 =S +D =0+(-40)= mx = S' 90 -TI' 10 -8 = -TI' As expected, the values agree with those derived previously.
The particular component which physically limits the solid angle of rays passing through the system from an on-axis object is called the aperture stop. Thus to calculate the aperture stop, evaluate the "Acx" angle for each component. Remember that when calculating Acx for a particular component, assume that the other components have infinite size. Then the component which makes the lowest "Acx" is called the aperture stop. H is of interest to define the Acx angle again. From the on-axis source, let us consider the rays which slowly make larger and larger angles with respect to the optical axis.