Hard to find large input beam diameters http://www.antelaser.com.cn/beamexpander.htm
CNI http://www.cnilaser.com/beam expander.htm
photoptech http://www.photoptech.com/main/products_jg/Laser.php
Good for pen style lasers. A simple holder could be made from small diameter pvc pipe
http://www.lasermate.com/optics.htm
CNI http://www.cnilaser.com/beam expander.htm
photoptech http://www.photoptech.com/main/products_jg/Laser.php
Good for pen style lasers. A simple holder could be made from small diameter pvc pipe
http://www.lasermate.com/optics.htm