Chinese Optics Letters, 2009, 7 (1): 0170, Published Online: Mar. 4, 2009
Problems on fabrication of computer-generated holograms for testing aspheric surfaces Download: 896次
非球面 计算全息术 光学检测 220.1250 Aspherics 050.1970 Diffractive optics 090.1760 Computer holography 220.3620 Lens system design
Abstract
Interferometric optical testing using computer-generated hologram (CGH) can give highly accurate measurement of aspheric surfaces has been proved. After the system is designed, a phase function is obtained according to the CGH’s surface plane. For the requirement of accuracy, an optimization algorithm that transfers the phase function into a certain mask pattern file is presented in this letter, based on the relationship between the pattern error of CGH and the output wavefront accuracy. Then the writing machine is able to fabricate such a mask with this kind of file. With that mask, an improved procedure on fabrication of phase type CGH is also presented. Interferometric test results of an aspheric surface show that the whole test system obtains the demanded accuracy.
, , , , , , , , , , . Problems on fabrication of computer-generated holograms for testing aspheric surfaces[J]. Chinese Optics Letters, 2009, 7(1): 0170.