北京航空材料研究所研究发展的“测定有机玻璃成型残余应力的新的光弹性方法”(双折射主切片法),于1986年10月通过技术鉴定。鉴定意见指出:北京航空材料研究所通过大量的实验研究和理论分析,提出了有机玻璃 Beijing Institute of Aeronautical Materials research and development of the “Determination of residual stress of plexiglass forming a new photoelastic method” (birefringence master slice method), in October 1986 passed the technical appraisal. Appraisal opinion pointed out: Beijing Institute of Aeronautical Materials through a large number of experimental studies and theoretical analysis, put forward the plexiglass