background lightning

On: Thu, Feb 07, 02 06:01:22 PM

Thilo K. wrote:

hello, I tried out a 2 beams transmission setup where the object beam illumates a ground glass screen, which acts as a background and a lightning as well for a translucent object. The object is placed at its normal position for tm-hs. On the final film, i canīt see any interference pattern and no holographic image - do you know why ? This text-art should visualize my setup / / /-------- object beam / -- ------------ / -- ------------ --- ------- -- -- --- -- -- / | --- / | Object | -- / | / | -- / | /--\ / | --/ | | |/----|------------- / |\ | |\\ | / | \ \--/ \ | / | \ | / | \ | / Film \ | \ | \ \ ground glass \ \ \ \ \ \ \ \ \ \ \ \ reference beam \ \

RESPONSES

Colin Kaminski - Thu, Feb 07, 02 09:59:16 PM

In a situation like this it is important to know your object to reference beam ratios. Since the diffuser randomizes the polarization of the object beam I would take the object beam reading through a polarizer aligned with the polarization of the reference beam. 64.170.193.19

Thilo - Fri, Feb 08, 02 01:37:18 AM

the ratio is 2.5:1 = Ref:Obj. - measured without a polarizer. I will try out your method later and tell you what it is then. 145.253.2.233


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