A 35 mm Hologram Camera

Abstract

The measurement facilities available from holographic interferometry are well known. It is, however, an inconvenient technique to operate and its use may be precluded when contemplating work outside the confines of a vibration isolated table located in a blacked out room.

Based on a standard 35 mm rdlex camera the interference camera described here circumvents these difficulties. Using the principles of common path interferometry and white light holography, interferograms can be taken under normal room lighting conditions. Apart from the laser required to illuminate the object under study, operation of the camera is similar to ordinary photography there being no need for elaborate vibration isolation. An economic advantage is also realized by using acetate-based roll film in place of the usual glass backed plates.