Measureing the position of passively aligned optical components

Abstract

Optical components may be precisely positioned in three dimensions with respect to one another. A bonder which has the ability to precisely position the components in two dimensions can be utilized. The components may be equipped with contacts at different heights so that as the components come together in a third dimension, their relative positions can be sensed. This information may be fed back to the bonder to control the precise alignment in the third dimension.

1 - 6 . (canceled) 
     
     
         7 . A method comprising:
 aligning two optical components in two dimensions using a placement tool; and   using a surface feature on the two components to determine the position of said components relative to one another in a third dimension.   
     
     
         8 . The method of  claim 7  wherein said surface feature includes a stepped configuration having steps in said third dimension. 
     
     
         9 - 21 . (canceled) 
     
     
         22 . An apparatus, comprising:
 a first optical component;   a second optical component to be aligned with the first optical component; and   stepped surface features on one of the first optical component and the second optical component to determine the position of said components relative to one another in a third dimension.