Abstract
THE simplest forms of holography require that, when light waves carrying information about an object are incident on the recording material, a uniform light wave which is to some degree coherent with the first should fall simultaneously over the same area. The various practical forms of this principle differ principally in the way in which these two mutually coherent waves are derived1–3. It is often convenient for the reference wave to be spherical, so that a point source can be used as a reference in reconstruction. At the recording stage coherent waves of different curvature must be provided, and for transilluminated objects such as transparencies the difference of curvature is provided by the illuminating optical system. Even when the object is illuminated through a diffuser, it may be advantageous to arrange for a plane wave to illuminate each point of the transparency simultaneously, while the reference wave converges to a point in the same plane. We have found that a double focus lens can perform this function very efficiently, and the scheme lends itself to an effective demonstration of holography.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Born, M., and Wolf, E., Principles of Optics (Pergamon Press, 1959).
Stroke, G. W., An Introduction to Coherent Optics and Holography (Academic Press, 1966).
De Velis, J. B., and Reynolds, G. O., Theory and Applications of Holography (Addison–Wesley, 1967).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
GATES, J., BENNETT, S. Holography with a Double Focus Lens : a Simple Lecture Demonstration. Nature 218, 942–943 (1968). https://doi.org/10.1038/218942a0
Received:
Issue Date:
DOI: https://doi.org/10.1038/218942a0
This article is cited by
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.