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...

AI Technical Summary

Problems solved by technology

In particular, time delays caused by processing film have in many cases prevented the use of holography and its variants

Even if the cost of the classic holographic system itself is acceptable, the delay-related costs due to time delays and low throughput rates due to the need to process film are absolutely unacceptable (for example, a tire manufacturer cannot wait 45 minutes, or even 2 minutes to know that there is a defect in a specific tire)

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