There are two categories of lenses, both distinguished by a different numerical aperture: SLW (wide)and SLH (high). Each NA type is appropriate for different applications and exhibits different alignment sensitivities (see Technical Charts Table 2).
While the numerical aperture is a maximum at the center of the lens aperture, the actual NA is a function of the ray parameters (height and angle) for each ray that strikes the lens’ surface. Click to the Appendix of this guide for an illustration of how the NA depends on these parameters.
SEFLOC® SLC-180 Collimating Lens
• Low Insertion Loss
• Improved Collimation
• Drop-In Replacement for SLW-180 SELFOC Lens
• Optical Isolators
• DWDM Devices
The SLC-180 SELFOC Collimating Lens is designed for use in demanding telecommunication and data communication applications. The compact size, convenient shape and high optical efficiency contribute to its world-wide recognition as a unique and economical solution to many optical design challenges.
Because of its very low insertion loss, the SLC-180 helps support the ever-increasing need for ultra low loss, high bandwidth telecommunications systems. Typical insertion loss for this lens is only 0.1dB per pair. Applications for the SLC-180 include optical isolators, collimators and DWDM devices.