Ring illumination apparatus for illuminating reflective elements

Details Ring illumination apparatus for illuminating reflective elements Ring illumination apparatus for illuminating reflective elements

1997-02-26

1999-08-24

Kim, Robert H.

Optics: measuring and testing

Inspection of flaws or impurities

356375, 25055934, 2505594, 25055946, 348 87, 348126, 348131, 382146, G01N 2100, G01B 1114, H04N 718, H04N 947

Patent

active

059431253

ABSTRACT:
An inspection system and method uses a ring illumination apparatus to illuminate one or more reflective elements, such as solder balls on an electronic component or other protruding surfaces or objects. The ring illumination apparatus includes a substantially ring-shaped light source that provides a substantially even illumination across the one or more reflective elements. An illumination detection device detects light beams reflecting off of the illuminated reflective elements for forming a reflected image. A method of processing the reflected image includes locating one or more edges of each reflected image element representing an illuminated reflective element. The edges of the reflected image elements are located by determining the maximum intensity gradient in the pixels forming the reflected image element. The inspection system and method thereby determines various characteristics such as the absence/presence, location, pitch, size and shape of each reflective element.

REFERENCES:
patent: 4028728 (1977-06-01), Sharp
patent: 4677473 (1987-06-01), Okamoto et al.
patent: 4688935 (1987-08-01), Barnes et al.
patent: 4688939 (1987-08-01), Ray
patent: 4695157 (1987-09-01), Schoenbaum et al.
patent: 4697076 (1987-09-01), Yoshida
patent: 4972093 (1990-11-01), Cochran et al.
patent: 4988202 (1991-01-01), Nayar et al.
patent: 5023916 (1991-06-01), Breu
patent: 5030008 (1991-07-01), Scott et al.
patent: 5039868 (1991-08-01), Kobayashi et al.
patent: 5051872 (1991-09-01), Anderson
patent: 5058178 (1991-10-01), Ray
patent: 5064291 (1991-11-01), Reiser
patent: 5072127 (1991-12-01), Cochran et al.
patent: 5097516 (1992-03-01), Amir
patent: 5118193 (1992-06-01), Brown et al.
patent: 5127727 (1992-07-01), Arnold et al.
patent: 5137362 (1992-08-01), LeBeau
patent: 5166985 (1992-11-01), Takagi et al.
patent: 5247344 (1993-09-01), Doan
patent: 5257714 (1993-11-01), Beers et al.
patent: 5267217 (1993-11-01), Tokura et al.
patent: 5302836 (1994-04-01), Siu
patent: 5394246 (1995-02-01), Sugawara
patent: 5406372 (1995-04-01), Vodanovic et al.
patent: 5418879 (1995-05-01), Kalnajs et al.
patent: 5420689 (1995-05-01), Siu
patent: 5424838 (1995-06-01), Siu
patent: 5440391 (1995-08-01), Smeyers et al.
patent: 5461417 (1995-10-01), White et al.
patent: 5495424 (1996-02-01), Tokura
patent: 5519496 (1996-05-01), Borgert et al.
patent: 5533146 (1996-07-01), Iwai
patent: 5539485 (1996-07-01), White
patent: 5574801 (1996-11-01), Collet-Beillon
patent: 5581632 (1996-12-01), Koljonen et al.
patent: 5598345 (1997-01-01), Tokura
patent: 5604550 (1997-02-01), White

Affiliated with

Also associated with

Rating

Ring illumination apparatus for illuminating reflective elements does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ring illumination apparatus for illuminating reflective elements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ring illumination apparatus for illuminating reflective elements will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-472005