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现有的全息干涉计量术大都采用透射式费涅尔全息图,摄制这种全息图时,物光与参考光都经过较长的光程,于是就必须保持光程的稳定。这是由于λ/8的光程变化会使像模糊,如变化再大一些,就会完全解调以致不能成像。为此光学系统必须有严格的隔振措施,这样就限制了全息干涉计量术的应用范围和场所。本文介绍的一束光反射式全息干涉方法就是为了解决这个问题,它使得在环境不安静并存在种种扰动的现场也能应用全息干涉计量术,从而能够使这项新技术更好地为我国社会主义革命和建设事业服务。
Most existing holographic interferometry uses transmissive Fresnel holograms. When producing such a hologram, both the object light and the reference light pass through a longer optical path, so that the optical path stability must be maintained. This is because the optical path change of λ / 8 will make the image blur, if the change is larger, it will be completely demodulated so that it can not be imaged. For this optical system must have strict vibration isolation measures, thus limiting the scope of application of holographic interferometry and place. In order to solve this problem, a beam reflection holographic interferometry method introduced in this paper can make use of holographic interferometry in the field where the environment is not quiet and all kinds of disturbances exist, so as to make this new technology better serve our society Revolutionaryism and construction services.