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全息照相术(HoLography)一字来自希腊文,意思是“全面的记录”。其形成过程为:物体被相干光照明,在照相乳胶上形成干涉条纹,经过处理后的干涉图案被同一波长的光照明时,就能再现一个原物体的立体图象。全息照相术的原理是1948年由伦敦大学科学技术学院的丹尼斯·伽桕提出来的,直到六十年代激光技术发展起来之后,全息照相术才得以成功。如果把全息照相术中的“物体”改为点光源,则再现物体时就会形成一个会聚光束,全息透镜就是利用达个原理制成的。简单地说:全息透镜就是采用激光全息术形成的和普通光学透镜具有相同作用的全息图片。
The word holography (HoLography) comes from the Greek word meaning “a comprehensive record.” The formation process is: the object is coherent light illumination, the formation of the interference fringes on the photographic latex, the processed interference pattern is the same wavelength of light illumination, you can reproduce a three-dimensional image of the original object. The principle of holography was proposed by Dennis Gary of the University of Technology and Science in London in 1948 and holographic photography did not succeed until the development of laser technology in the 1960s. If you change the “object” in holography to a point source, a converging beam will form when the object is reproduced, and the holographic lens is made using a principle. Simply put: holographic lens is the use of laser holography and general optical lens has the same effect of hologram.