Method and device for indicating point of contact

Details Method and device for indicating point of contact Method and device for indicating point of contact

1982-05-24

1984-09-11

Punter, William H.

Metal fusion bonding

Process

Critical work component, temperature, or pressure

228 565, B23K 3700

Patent

active

044706707

ABSTRACT:
A method and device for providing point of contact light or target on a work piece are provided which are particularly adapted for use with a wire bonder independent of the operator's viewing aid and which employ a high intensity light source to create a naturally colored beam of light. In accordance with one embodiment of the invention, a helium-neon laser beam is expanded and then formed into a point of light which is projected onto the work piece surface by an adjustable mirror arrangement which is positioned to reflect the specular component of the beam away from the operator's viewing sight line and which enables easy focusing and adjustment of the target spot so as to substantially reduce parallax.

REFERENCES:
patent: 3169183 (1965-02-01), Radtke et al.
patent: 3186296 (1965-06-01), Erban
patent: 3661316 (1972-05-01), Kulicke et al.
patent: 3769963 (1973-11-01), Goldman et al.
patent: 4088890 (1978-05-01), Waters
patent: 4289378 (1981-09-01), Remy et al.
patent: 4329015 (1982-05-01), Feinbloom
Peppers, N. A., "A Laser Microscope", App. Optics 5-1965, pp. 555-558.

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