Dear Prof. Fielding, The Focus length of L1 is 100 mm, and the apex angle for prism (LakL 21) is 59.75 degree, and for quartz prism is 69.1 degree. With these parameters, you can order these optics from optic company. you can buy similar moveing stage for prism mount. If you need more information, please let me know. I know how to align the mira seed oscillator. Best wishes, Andong -----原始邮件----- 发件人: "Fielding, Helen" <[log in to unmask]> 发送时间: 2017年6月29日 星期四 收件人: [log in to unmask] 抄送: 主题: Coherent Mira Seed Optics Dear colleagues, Our 20-year old Coherent Mira Seed has some damaged components and we were wondering if anyone has an unused Mira Seed with either of the following: focusing lens L1 (PN: 0169-177-00) BP1, BP2 (PN for fused silica prism without mount: 0161-001-00) BP1, BP2 (PN for assembly with mount: 0169-347-00) Alternatively, if you have the specifications of these components that would also be helpful. Best wishes, Helen Professor Helen Fielding Department of Chemistry University College London 20 Gordon Street London WC1H 0AJ T: +44 (0)20 7679 5575 W: www.ucl.ac.uk/chemistry/people/helen-fielding To join or leave the molecular-dynamics-news email list, go to: http://www.jiscmail.ac.uk/lists/molecular-dynamics-news.html -- Andong Xia, Professor of Chemistry Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China Fax:010-62563167 Tel:010-62562865 Email:[log in to unmask] HomePage: http://andong.iccas.ac.cn/index.html To join or leave the molecular-dynamics-news email list, go to: http://www.jiscmail.ac.uk/lists/molecular-dynamics-news.html