Patent ID: 7290946
Filing Date: 2007-11-06
Classification: G02B

Abstract:
1. An optical subassembly comprising: a receptacle having an optical axis and a chamber; a coupling structure formed in a direction of the optical axis, the coupling structure and the receptacle forming a single unit, the coupling structure having a dual-lens having two lenses, and one of the lenses of the dual-lens of the coupling structure being disposed in the chamber; a light emitting device assembled in the chamber of the receptacle and disposed in alignment with the optical axis, the light emitting device including an outer seal and a light emitting chip disposed in the outer seal, a transparent surface being defined on a surface of the light emitting chip, the transparent surface being a flat structure without having a micro lens; an open aperture formed in a surface of the outer seal of the light emitting device and located opposite to the transparent surface of the light emitting chip; an air gap formed between an outer surface of the outer seal of the light emitting device and an inner surface of the chamber; at least two temporally fixings disposed in the air gap to connect the chamber of the receptacle and the outer seal of the light emitting device; an adhesive filled with the air gap and stayed on a periphery of the outer seal; a light path located between the light emitting chip and the coupling structure; wherein a plurality of light beams emitted from the light emitting chip can pass through the transparent surface to travel in the light path without producing refraction.