G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 6/36 (2006.01) G02B 6/26 (2006.01) G02B 6/32 (2006.01)
Patent
CA 2278081
The present invention relates to an optical coupling employing an optical element for direct adhesive coupling to an additional optical element. One of the optical elements includes a coupling end face adapted for mating contact with a coupling end face of the second optical element having a continuous groove spaced from an outside edge of the coupling end face defining a peripheral securing surface for receiving adhesive, the groove surrounding a transmission window through which a transmitted signal is coupled into the additional optical element in use. The present invention has found that the planar coupling end faces of the optical elements can be contoured to have an annular groove providing a barrier between a transmission window, where no adhesive disrupts the optical coupling and a peripheral securing surface for providing an adhesive join between the elements. The burner provided by the groove prevents adhesive from migrating and obscuring the transmission window. The direct coupling of planar ferrule and lens surfaces of the present invention provides the advantages of alignment and tuning control. Other optical elements such as multiple lenses, or lenses and filters etc., may also advantageously be coupled in accordance with the invention to provide reliable coupling with an unimpeded transmission area. If the surface contact means used is adhesive, such as epoxy, metal solder, glass solder, molten glass, pressure activated adhesive or the like, between the planar surfaces of the optical elements, surface tension makes it relatively easy to maintain the transmission window free of adhesive for unimpeded transmission. It is also possible to adjust the position of the elements to tune different alignment configurations.
Jds Fitel Inc.
Teitelbaum Neil
LandOfFree
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