Patent ID: 7505650
Filing Date: 2009-03-17
Classification: B29D,C03B,C03C,G02B,Y02P

Abstract:
1. A method of making an optical assembly, the method comprising: providing a substrate having a surface, the substrate having a first absorption within an operational wavelength range, and a second absorption outside the operational wavelength range, wherein the second absorption is greater than the first absorption; coupling a waveguide with a processing light source and an operational light source, the processing light source outputting a processing light beam having a wavelength outside the operational wavelength range; directing the processing light beam through the waveguide to the substrate to locally heat the substrate and cause local expansion of the substrate so as to form a microlens on the substrate surface; and terminating the processing light beam to stop heating of the substrate so as to fix the microlens, wherein the processing light beam is diverging when it reaches the substrate.