Read e-book online A Course in Lens Design PDF

By Chris Velzel

ISBN-10: 9401786844

ISBN-13: 9789401786843

ISBN-10: 9401786852

ISBN-13: 9789401786850

A path in Lens layout is an guide within the layout of image-forming optical structures. It teaches how a passable layout may be bought in a simple manner. thought is proscribed to a minimal, and used to aid the sensible layout paintings. The booklet introduces geometrical optics, optical tools and aberrations. It offers an outline of the method of lens layout and of the thoughts utilized in this strategy. 1/2 its content material is dedicated to the layout of 16 varieties of lenses, defined intimately from commencing to finish. This e-book isn't like such a lot different books on lens layout since it stresses the significance of the preliminary levels of the layout technique: (paraxial) lay-out and (thin-lens) pre-design. The argument for this alteration of accessory is that during those stages a lot info could be bought in regards to the homes of the lens to be designed. this knowledge can be utilized in later stages of the layout. This makes A path in Lens layout an invaluable self-study ebook and an appropriate foundation for an introductory direction in lens layout. the maths in general used is university algebra, in a number of sections calculus is utilized. The booklet can be utilized by scholars of engineering and technical physics and by means of engineers and scientists.

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Extra info for A Course in Lens Design

Example text

Vignetting can be prevented when the field stop is in the object plane or a plane conjugated with it. This is the case in microscopes and telescopes (see Chap. 2). 22 1 Geometrical Optics Fig. 22 Entrance pupil and exit pupil Fig. 1 Telecentric Stop When the stop is in the focal plane, as shown in the figures, the size of either object or image, or both, is independent of the distance from the lens. We have three types of telecentricity: object telecentricity (Fig. 24a), image telecentricity (Fig.

8) is given by MA ¼ À ff 1 : 2 (ML ¼ M1 is an example of a more general relationship, known as Lagrange’s A invariant, see Sect. ) Usually we designate a hand-held telescope by a product like 8 9 30, where the first figure denotes MA and the second the diameter of the entrance pupil. The diameter of the exit pupil is now 30 8 ¼ 3:75 mm. The system of Fig. 4 Telescopes 33 Fig. 7 Kepler’s telescope Fig. 8 Magnification w¼ 1 Uoc 2 ðf 1 þ f 2 Þ where Uoc is the diameter of the ocular. With our 8 9 30 telescope and f1 = 200 mm we have f1 ?

In image space it seems to come from the centre of the exit pupil (marked by an X). Rays from the object point Q above the chief ray do not pass the system. Only part of the beam from Q reaches the image plane; this effect is called vignetting. We take Q as the edge of the usable field. Vignetting can be prevented when the field stop is in the object plane or a plane conjugated with it. This is the case in microscopes and telescopes (see Chap. 2). 22 1 Geometrical Optics Fig. 22 Entrance pupil and exit pupil Fig.

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A Course in Lens Design by Chris Velzel


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