|
|
|
| Back-vertex-power Measurement System Based on Laser Differential Confocal Technique |
| LI Fei1,2, LI Lin1, HONG Bao-yu2, ZHAO Wei-qian1 |
1. Beijing Institute of Technology, Beijing 100081, China;
2. National Institute of Metrology, Beijing 100013, China |
|
|
|
|
Abstract A new vertex-power measurement method based on laser differential confocal technique is proposed for the demand of high-precision back-vertex-power measurement. A vertex power measurement system is built up. This system takes advantage of outstanding focusing ability of laser differential confocal system to improve the positioning accuracy, and uses the interferometer to measure the distance from the origin and finally gets the results by means of conversion of the formula. The component design specifications and influence factors are analyzed. Theoretical analysis and experimental results show that the measurement error of the method is about 0.03 m-1.
|
|
|
|
|
|
[1] 马振亚，王莉茹，胡继军．顶焦度标准镜片组的研制[J]．计量学报，1991，12 (3):166-172．
[2] 马振亚，王莉茹，刘文丽，等．角膜接触镜专用顶焦度标准器的研制[J]．计量学报，2001，22(2):102-105．
[3] Zhang J Y, Sun J, Gao M L, et al. Metrological research on test method for phoropters [C] // 8th International Conference on Electronic Measurement and Instruments, Beijing, China, 2007.
[4] 张吉焱，刘文丽，孙劼．综合验光仪中镜片偏心与倾斜对验光的影响分析[J]．计量学报，2010，21(1): 17-21．
[5] ISO 10341:2009 Ophthalmic instruments - Refractor heads[S].
[6] 孙若端，邱丽荣，杨佳苗，等．激光差动共焦曲率半径测量系统的研制[J] ．仪器仪表学报，2011，32(12):2833-2838．
[7] 史立波，邱丽荣，王允，等．激光差动共焦透镜中心厚度测量系统的研制[J] ．仪器仪表学报，2012，33(3):683-688．
[8] Zhao W Q, Sun R D, Qiu L R, et al. Laser differential confocal radius measurement[J]. Optics Express, 2010, 18(3): 2345-2360.
[9] Zhao W Q, Sun R D, Qiu L R. Laser differential confocal ultra-long focal length measurement[J]. Optics Express, 2009, 17(22): 20051-20062. |
|
|
|
2014, Vol. 35 
