The tolerance on wavelength stability for frozen-fringe holography is calculated. It is convenient to split the effect into three terms: (1) the interferometric term that depends on the path difference between the reference beam and the signal beam, (2) the holographic term that represents the difference of wave-front curvature between signal and reference beams at the hologram plate, and (3) a lateral-displacement term. It is highly desirable to reduce to a minimum all the differences mentioned and to keep down the lateral-displacement term. To do this, new designs of holographic interferometers are proposed. With a carefully designed interferometer and an object only 2 cm thick, the wavelength tolerances are within the control exercised by a well-designed resonant reflector.
© 1971 Optical Society of AmericaFull Article | PDF Article
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