Spherical aberration in lens imaging

VP5.1.3.1
Spherical aberration in lens imaging
Spherical aberration in lens imaging Intersections of paraxial and abaxial rays (P5.1.3.1)
Spherical aberration in lens imaging

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Description

The experiments P5.1.3.1 and P5.1.3.2 deal with aberrations of image sharpness. In a ray path parallel to the optical axis, paraxial rays are united at a different distance from abaxial rays. This effect, known as “spherical aberration”, is particularly apparent in lenses with sharp curvatures. Astigmatism and curvature of field may be observed when imaging long objects with narrow light beams. The focal plane is in reality a curved surface, so that the image on the observation screen becomes increasingly fuzzy toward the edges when the middle is sharply focused. Astigmatism is the phenomenon whereby a tightly restricted light beam does not produce a point-type image, but rather two lines which are perpendicular to each other with a finite spacing with respect to the axis.

Components of equipment sets

1 45060  4  Lamp housing with cable LD
1 450511  8  Bulbs 6 V/5 A/30 W, E14, set of 2 LD
1 46020  4  Condenser with diaphragm holder LD
1 521210  8  Transformer 6/12 V LD
1 46161 Diaphragms for spherical aberration, pair LD
1 46166  4  Objects for investigating images, pair LD
1 46008  8  Lens in frame, f=150 mm LD
1 46026  8  Iris diaphragm LD
1 44153  8  Screen, translucent LD
1 460310  8  Optical bench, S1 profile, 1 m LD
2 460311  4  Clamp rider with clamp 45/65 LD
2 460312  4  Clamp rider with clamp 45/35 LD

Experiment Instructions

PDF (Experiment description) PDF (Experiment description) P5.1.3.1 Spherical aberration in lens imaging
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