Lens and mount for use with electromagnetic wave source

Claim 1

For use in combination with a radiation emitter or detector device, the improvement comprising: (a) a lens cap having a skirt defining an emitter or detector device receiving zone, (b) the cap including a lens integral with the skirt (and characterized as being collimated or convergent beam as respects) for refracting radiation passing to or from said zone, (c) said skirt including at least two rearwardly and horizontally endwise extending spring fingers adapted to be spread relatively apart to receive and retain said device therebetween, in said zone, (d) said spring fingers having downwardly relatively divergent cam surfaces to be spread apart in response to relatively upward insertion of said device into said zone, and said spring fingers having grooves therein facing said zone to receive edge portions of said device, said grooves having locating shoulders facing upwardly to position said device, vertically, (e) and said skirt including another spring finger overlying said zone to be engaged and deflected upwardly by said device and to resiliently urge said device relatively downwardly against said locating shoulders, whereby insertion of said device substantially normal to the endwise direction of the spring fingers is enabled.