Direct-to-digital holographic holographic interferometry, and holovision

Abstract

Systems and methods for direct-to-digital holography are described. An apparatus includes a laser; a beamsplitter optically coupled to the laser; a reference beam mirror optically coupled to the beamsplitter; an object optically coupled to the beamsplitter, a focusing lens optically coupled to both the reference beam mirror and the object; and a digital recorder optically coupled to the focusing lens. A reference beam is incident upon the reference beam mirror at a non-normal angle, and the reference beam and an object beam are focused by the focusing lens at a focal plane of the digital recorder to form an image. The systems and methods provide advantages in that computer assisted holographic measurements can be made.

Description

technical field

[0001] The present invention relates generally to the field of holography. The present invention specifically relates to a direct-digital hologram acquisition and reconstruction system (ie, no film, no dry plate). In a preferred embodiment of the invention, the acquisition of the hologram is based on a Charge Coupled Device (CCD) camera. Therefore, the present invention relates to a holographic system. Background technique

[0002] Traditional holography methods use film or holographic dry plates (with glass plates suitable for holographic photographic emulsions) to record holograms (1) . It is only possible to carry out the reconstruction analogously with laser light (or in some cases with white light) and the original recorded hologram or a replica thereof. These mock methods are slow, cumbersome, and expensive (4) . Moreover, there is no way to convert them into electronic signals that can be transmitted and reproduced elsewhere. Often a hard copy n...

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