@article{2002-alt-optik-v113-p142, Abstract = {We present the design of a diffraction limited, long working distance monochromatic objective lens for efficient light collection. Consisting of four spherical lenses, it has a numerical aperture of 0.29, an effective focal length of 36 mm and a working distance of 36.5 mm. This inexpensive system allows us to detect 8ยท10^4 fluorescence photons per second from a single cesium atom stored in a magneto-optical trap.}, Author = {Alt, W.}, Journal = {Optik}, Pages = {142}, Title = {{An objective lens for efficient fluoresence detection of single atoms}}, Volume = {113}, Year = {2002} }