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P5833 Holography PDF Download page

  • Setup for stability check
  • Transmission hologram
  • Reflection hologram
  • Preparation of development chemicals
  • Recording and developing
  • Examples of investigations and measurements
General setup
The holography setup consists of the laser (4) which emits a wavelength of 532 nm and an output power of 3 mW. The laser is monitored by the timer and injection current controller (5). The beam is separated into two (S) whereby one forms the reference and the other the object beam. Each beam is expanded by the provided biconcave lenses (1,2). By means of the mirrors M1 and M2 the beams are directed either to the object (O) or to the holographic plate (3).
By arranging the position of the object with respect to the holographic plate different types of holograms can be recorded.
The recording of the hologram is one task, developing the other most exciting part is the development and subsequent reproduction of the recorded hologram. The second part starts with the composition and mixing of the developer and bleacher chemistry. Since the lifetime of the ready mixed solution is limited to a couple of hours fresh solutions needs to be prepared.

The VRP-M film is developed for the use with green emitting laser. The maximum sensitivity is located around 500 to 535 nm which allows the use of common DPSS laser emitting at 532 nm.
Already at 600 nm the sensitivity decreased in such a way that a red LED can be used to illuminate the dark room lab. The plates have a size of 2.5 inches in square and coming in a box of 30 plates. The lifetime of the plate’s emulsion is about 2 years when kept in a dry and cool place.
For the development and bleaching of the film plates all necessary equipment is provided. For the composition of the chemicals a precise lab balance with 0.1 g accuracy is provided. As developer the CW-C2 two-part developer and for the bleaching the PBU Amidol recipe is applied. Three special bottles are used to contain the two parts of the developer and the Amidol bleach.

Practical setup configurations
For the recording of the holograms a quiet environment is an indispensable prerequisite. To check this the holographic setup is modified to a Michelson interferometer (A). If the fringes are stable within 30 seconds than the environment is suitable.
The first setup for recording transmission holograms is shown on the right in figure (B).
The next configuration (C) is used to create reflexion holograms. Here the object is located behind the plate and the scattered light penetrates to the emulsion where the interference with the reference beam takes place.
Finally the arrangement (D) named after Denisyuk makes use of only one beam. Actually a fraction of the laser beam passing the plate shines on to the object whereby the back scattered light interferes with the light on the emulsion. This type of holograms are termed as Denisyuk holograms.
   
   
  • P5833 Holography consisting of:
ItemCodeQtyDescription
14B-00802Biconcave lens f=-5 mm, free opening 7 mm, click 25
24B-00902Biconcave lens f=-10 mm, �10 mm, C25 mount
34P-020030Photographic plate for holography, 532 nm, 63 x 63 mm
4ED-00241Digital laser controller & timer
5LS-01101DIMO diode laser module, 532 nm
6MC-02602Optical rail MG 65, 500 mm
7XM-01901Plate holder on carrier 20
8XM-06401Set of development equipment
9XM-06501Set of developer chemicals
10XM-06701Holography combining assembly
11XM-06801Holography beam splitting assembly
12XM-10901Mounting plate C25 with carrier 20 mm
13XM-11101Adjustment holder, 4 axes, carrier 20 mm
 Options:  
 4B-05801Photodetector, mini Si PIN, connection lead
 TP-00301Digital multimeter 3 1/2 digits