Patent ID: 6781775
Filing Date: 2004-08-24
Classification: G02B,H05K

Abstract:
An optical device for use in aligning a first object relative to a second object, comprisinga first reflective surface; a second reflective surface oriented so as to face the first object; a third reflective surface positioned relative to said first and second reflective surfaces for reflecting an image of the first object, which is reflected from said second reflective surface, toward said first reflective surface; a fourth reflective surface oriented so as to face the second object; and a fifth reflective surface positioned relative to said first and fourth reflective surfaces for reflecting an image of the second object, which is reflected from said fourth reflective surface, toward said first reflective surface, said first reflective surface being laterally offset relative to said second and fourth reflective surfaces, and said first reflective surface being partially reflective and being oriented such that at least a portion of the image of the first object reflected from said third reflective surface can be reflected by said first reflective surface in a lateral direction and such that at least a portion of the image of the second object reflected from said fifth reflective surface can pass through said first reflective surface in said lateral direction, thereby forming a substantially superimposed image of the first and second objects.