Patent ID: RE44014

Claim:
A optical reader system , suitable for use with a biosensor when placed in an operative position relative to the optical reader system, said system comprising: a light source; a light detector resonance shift detection system ; and a launch/receive system which includes: a single mode optical fiber; and a lens, wherein said single mode optical fiber is interfaced with said light source and said light detector resonance shift detection system , wherein said single mode optical fiber is physically separated from said lens and said lens is physically separated from a biosensor when placed in the operative position , wherein said single mode optical fiber emits a light beam generated by said light source such that the emitted light beam is focused by said lens before interfacing at a substantially normal incidence with the a biosensor when placed in the operative position , wherein said a biosensor , when placed in the operative position, reflects the light beam such that the reflected light beam passes through said lens and said single mode optical fiber and is received by said light detector resonance shift detection system .