Patent ID: 7724452

Claim:
An optical lens assembly comprising: a first lens comprising a first central portion and a first annular stepped portion surrounding the first central portion, the first annular stepped portion having a first outer step and a second outer step, the first outer step having a first outer side surface and a first downward-facing surface, the second outer step having a second outer side surface and a second downward-facing surface; a second lens comprising a second central portion and a second annular stepped portion surrounding the second central portion, the second annular stepped portion having a first inner step and a second inner step, the first inner step having a first inner side surface and a first upward-facing surface, the second inner step having a second inner side surface and a second upward-facing surface, the first annular stepped portion engaged in the second annular stepped portion, the first outer side surface being in contact with the second inner side surface, the first downward-facing surface being in contact with the first upward-facing surface, a gap existing between the second outer side surface and the first inner side surface.