Abramson N
Appl Opt. 1975 Apr 1;14(4):981-4. doi: 10.1364/AO.14.000981.
Two hologram plates representing different object situations are bonded together with their emulsions separated. Fringes are formed that can be manipulated during reconstruction by moving the sandwich hologram in relation to the reconstruction beam. We have studied practical mathematical relations between sandwich motions, fringe changes, and object motion between the two exposures. Four dimensionless equations have been found that can be used for fringe evaluation by measuring sandwich motions. The wavelength of light is not involved in this new analogous compensating method. In contrast to ordinary double-exposed holograms, the sandwich hologram can directly reveal signs of displacements and maximal object strain.
两块代表不同物体状态的全息图板，其乳胶面相互分开并粘结在一起。形成的条纹在再现过程中可通过相对于再现光束移动夹层全息图来进行控制。我们研究了夹层移动、条纹变化以及两次曝光之间物体移动的实际数学关系。已发现四个无量纲方程，可用于通过测量夹层移动来评估条纹。这种新的类似补偿方法不涉及光的波长。与普通双曝光全息图不同，夹层全息图可直接揭示位移迹象和物体的最大应变。
