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 platforms. It teaches how a passable layout may be got in an easy method. conception is proscribed to a minimal, and used to aid the sensible layout paintings. The e-book introduces geometrical optics, optical tools and aberrations. It offers an outline of the method of lens layout and of the suggestions utilized in this approach. 1/2 its content material is dedicated to the layout of 16 forms of lenses, defined intimately from starting to finish. This publication isn't the same as such a lot different books on lens layout since it stresses the significance of the preliminary stages of the layout strategy: (paraxial) lay-out and (thin-lens) pre-design. The argument for this alteration of accessory is that during those stages a lot info might be acquired in regards to the houses of the lens to be designed. this data can be utilized in later levels of the layout. This makes A direction in Lens layout an invaluable self-study publication and an appropriate foundation for an introductory path in lens layout. the maths generally used is university algebra, in a number of sections calculus is utilized. The booklet should be utilized by scholars of engineering and technical physics and by means of engineers and scientists.

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This aberration is called coma. 44 Fig. 7 A ray picture of spherical aberration Fig. 8 Wavefront error and aberration plot for spherical aberration Fig. 9 Zonal image of coma. 1 Wavefronts and Aberrations 45 Fig. 10 Meridional and sagittal ray diagrams of coma (in perpendicular planes) Linearly dependent on field height g0 , quadratically dependent on pupil height q. The zonal images lie between two asymptotes (see Fig. 9) at an angle of 60°. 5 Field Curvature ÀE ¼ b3 UW gives dg0 ¼ 2 b3 g02 b3 g02 xr r yr ; dn0 ¼ 2 0 r 0 : 0 0 nu nu ð3:12Þ The wavefront error can be written E ¼ b3 q2 g02 r .

Sagittal field curvature R1 ¼ 4b3 , where again we have taken n0 u0 ¼ az. s 46 3 Aberrations Fig. 11 Ray diagram for meridional field curvature Fig. 12 Astigmatism, OM meridional (tangential) rays, OS sagittal rays, T tangential focal line, Sag sagittal focal line In many cases n0 ¼ 1 will be valid. In third order it is permitted to take the paraxial value az of sin u0 ; this introduces an error of higher order. See also the ray diagram in Fig. 11 and the perspective drawing in Fig. 12. In Fig.

A light source S is imaged by a condenser lens C in the pupil of the projection lens L. Between the source and the condenser there is a filter F that transmits only the visible part of the source spectrum, so as to prevent heating of the transparency (slide) T that follows the condenser. The slide is imaged on a screen (not in the figure) that is far from L, typically a few meters (at home) or some tens of meters (in a lecture room). Let us assume that the projector source is a 100 W halogen lamp, that will produce about 3,000 lumen.

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A Course in Lens Design by Chris Velzel


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