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Technical data


Fresnel's zone plate

Article no: P2220402

Principle

A zone plate is illuminated with parallel laser light. The focal points of several orders of the zone plate are projected on a ground glass screen.

Benefits

  • Find out that optical lenses can be completely different from what you are used to
  • Interference is used to produce effects commonly achieved with diffraction
  • The use of a laser lightsource provides clear results

Tasks

  1. The laser beam must be widened so that the zone plate is well illuminated. It must be assured that the laser lightbeam runs parallel over several meters.
  2. The focal points of several orders of the zone plate are projected on a ground glass screen. The focal lengths to be determined are plotted against the reciprocal value of their order.
  3. The radii of the zone plate are calculated.

Learning objectives

  • Huygens Fresnel principle
  • Fresnel and Fraunhofer diffraction
  • Interference
  • Coherence
  • Fresnel's zone construction
  • Zone plates

Scope of delivery

Diode pumped solid state laser, green, 1 mW, 532 nm 08765-99 1
Fresnel zone plate 08577-03 1
Component holder 08043-00 4
Lens made of glass, biconvex, f = + 20 mm 08059-00 1
Lens made of glass, biconvex, f = + 50 mm 08050-00 1
Lens made of glass, biconvex, f = + 100 mm 08051-00 1
Lens made of glass, biconcave, f = - 50 mm 08055-00 1
Polarisation filter on stem 08610-02 1
Optical bench expert, l = 1000 mm 08282-00 1
Base for optical bench expert, adjustable 08284-00 2
Digital array camera 35612-99 1
Slide mount for optical bench expert, h = 80 mm 08286-02 8
Universal Holder, rotational 08040-02 1
Ring for component holder 08044-00 4

PHYWE Systeme GmbH & Co. KG
Robert-Bosch-Breite 10 – 37079 Göttingen – Germany
www.phywe.com