Optical system for mutually positioning a pad carrying member and a multileaded component

System for mutually positioning a pad carrying member and the corresponding connecting leads of a multileaded component having a footprint, comprising:

• a) means for fixing the pad carrying member in a prescribed plane (2);
• b) means (4.2) for fixing the multileaded component (4.1) with the corresponding connecting leads of the multileaded component located along an imaginary plane (4), wherein said prescribed plane (2) and said imaginary plane (4) define an angle;
• c) means for rotating the multileaded component relative to the pad carrying member;
• d) optical means (3) including a semitransparent mirror (3.2) and two parallel optically identical transparent flat substrates (3.1 and 3.3), each of said transparent flat substrates having first and second opposed and parallel sides, said semitransparent mirror being arranged between and in direct contact with said first sides of said transparent flat substates, said second sides of said transparent flat substrates being parallel to each other and not in contact with said semitransparent mirror and said semitransparent mirror located along a third plane which bisects said angle, wherein said prescribed plane (2), said imaginary plane (4), and said third plane defining an axis (1) about which said means for rotating rotates the multileaded component relative to the pad carrying member;
• and
• e) lens means (5) directed via the optical means (3) at an angle of .pi./2 relative to the prescribed plane (2) for simultaneously observing both the footprint of the multileaded component and a corresponding section of the pad carrying member.

System for mutually positioning a pad carrying member and a footprint of a component having multiple leads, comprising;

• a) means for fixing the pad carrying member in a prescribed plane (8);
• b) optical means (9) including a flat transparent supporting plate (9.3) which is parallel to the prescribed plane, a flat transparent substrate (9.1) which is parallel to the prescribed plane and optically identical to said flat transparent support plate, and a semitransparent mirror coating (9.2) located on said flat transparent substrate (9.1) and between said flat transparent substrate (9.1) and said flat transparent supporting plate (9.3) such that a first distance from the prescribed plane to said semitransparent mirror coating is essentially equal to a second distance from said semitransparent mirror coating to an upper surface of said supporting plate, said upper surface supporting the leads of the component (10.1);
• c) means for moving the pad carrying member and the component relative to each other, and
• d) lens means (11) directed at said semitransparent mirror coating (9.2) of the optical means (9) at an angle smaller than .pi./2 for simultaneous observation of both the footprint of the component and a corresponding section of the pad carrying member.