PE-0800 Holography

Topics:

  • All fiber coupled

  • Fiber Spatial Filter

  • Fiber Beam Splitter

  • Single Mode Laser

  • Transmission Hologram

  • Reflection Hologram

  • Photographic Development

PE-0800 Holography Set-up
PE-0800 Holography

In 1948 – before the era of lasers (1960) - Denis Gabor developed the transmission holography technique and took the first real holograms. For the invention of holography Gabor received the Nobel Prize in 1971. In 1962 Yury Nikolayevich Denisyuk developed a holography technique which allowed to observe holograms by means of white light source rather than a monochromatic one, defined as reflection holography. Although holography did not reach the expected practical breakthrough, it is still worth to pay attention to this fascinating technique. The experimental set-up comprises a highly coherent green laser light source and the necessary optical components to create the expanded reference and object beam. With a few further components a Michelson interferometer is formed. The imaged interference pattern is used to check if the environment is free from vibration and other disturbances. Since a green laser source is utilized, appropriate film plates and developer are provided. Besides the optical components all required tools and materials are provided to make the developer and bleaching liquids out of provided dry chemicals. For the development of the exposed film plates all paraphernalia are provided.

Light path of fibre coupled holography set-up Fiber coupled Holography Set-up

The green emission of the an actively stabilized single mode laser is fed via a fiber collimator into the pig tailed fiber beam splitter creating two beams with same intensity. Each beam is guided in a single mode fiber to preserve the phase and coherence. One of the beams is directed to the object and the other to the film plate as reference beam. This unique arrangement of using modern fiber technology reduces significantly the extensive alignment of classical setup with spatial filter, separate beam splitter, expansion lens and beam bending mirrors. The optical fiber serves simultaneously as spatial filter, beam splitter and expansion lens. The only remaining adjustment is to direct the green laser radiation into the fiber, whereby the fiber collimator acts as a kind of a funnel. The precise 4 axes adjustment fine pitch screws provide a smooth and repetitious accuracy for an easy alignment process. The fibers coming from the beam splitter are terminated with ST fiber connectors and are connected to adjustment holder for precise and sustainable alignment to either the object or the film plate. This arrangement allows the convenient direction of the light beams without affecting the initial alignment and is not restricted to a mechanical structure. Thus all kind of holography types and object illumination can freely arranged.
PE-0800 Holography, consisting of:
Item Code Qty. Description
1 CA-0030 1 Set of development equipment
2 CA-0034 1 Set of developer chemicals
3 CA-0036 1 Sample object for holography
4 CA-0038 30 Photographic plate VRP-M, 532 nm, 63 x 63 mm
5 DC-0090 1 Laser controller and exposition timer
6 LQ-0040 1 Green (532 nm) stabilized Laser, 40 mW
7 MM-0060 1 Filter plate holder on MG20
8 MM-0420 1 Four axes kinematic mount on carrier MG20
9 MM-0440 2 Kinematic mount ø25.4 mm on MG20, left
10 MP-0110 3 Optical Bench MG-65, 100 mm
11 MP-0150 1 Optical Bench MG-65, 500 mm
12 OC-0436 2 FC Fiber jack in 1" disk
13 OC-0490 1 Sample transmission hologram (chess pieces)
14 OC-2020 2 ST/ST SM Fiber patch cable, length 1 m
15 OC-2360 1 Fiber SM beam splitter unit
16 UM-PE08 1 Manual Holography
Required Option (order separately)
17 LQ-0214 1 Dark Red LED in ø 25 housing

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