Effect of transverse object position on the reconstructed image of an aperture-limited in-line hologram

✍ Scribed by X. Fang; P.R. Hobson

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 590 KB
• Volume: 28
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(96)00032-1

✦ Synopsis

It is experimentally demonstrated that the image resolution from an in-line Fraunhofer hologram degrades appreciably when the centre of the diffraction pattern from a 5-bar resolution target is located asymmetrically in the hologram aperture. This effect is confirmed and analysed using calculated and experimentally measured images from holograms of a one-dimensional wire. Increasing asymmetry results in an increasing error in the measured linewidth, and a reduction of image resolution. A simple model based on average fringe contrast is used to predict this decrease in resolution with transverse object position.