JPS6457728A - Visual inspection device for pellet - Google Patents
Visual inspection device for pelletInfo
- Publication number
- JPS6457728A JPS6457728A JP62215599A JP21559987A JPS6457728A JP S6457728 A JPS6457728 A JP S6457728A JP 62215599 A JP62215599 A JP 62215599A JP 21559987 A JP21559987 A JP 21559987A JP S6457728 A JPS6457728 A JP S6457728A
- Authority
- JP
- Japan
- Prior art keywords
- pellet
- black
- section
- binary
- barycentric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Testing Or Measuring Of Semiconductors Or The Like (AREA)
Abstract
PURPOSE:To decide the appearance of a pellet regardless of the positional displacement and angular displacement of the pellet, and to eliminate the need for a reference pattern by measuring the peripheral section of the pellet and the barycentric coordinates of electrode sections from the regions of a white section and a black section in the inspection picture plane of the semiconductor pellet, measuring the distances of each barycentric coordinate and deciding the non-defective or defective appearance of the pellet. CONSTITUTION:The picture signal Si of a diode pellet Pi from a TV camera 1 is binary-coded by a binary-coding circuit 2 so that the peripheral section R of the pellet corresponds to a color such as black and an electrode E to a color such as white. The barycentric coordinates GR of a black section are measured by a centroid measuring circuit 4 in a binary-coded signal S2, and converted into the signal S2 as the black electrode E by an inversion appliance 3, and the barycentric coordinates GR are measured by a centroid measuring circuit 5. Both barycentric coordinates are read to a CPU 6, a distance between each barycentric coordinate is computed, and a defective decision output signal SO is output to a terminal 8 when the distance is kept within a predetermined range or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62215599A JPS6457728A (en) | 1987-08-28 | 1987-08-28 | Visual inspection device for pellet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62215599A JPS6457728A (en) | 1987-08-28 | 1987-08-28 | Visual inspection device for pellet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6457728A true JPS6457728A (en) | 1989-03-06 |
| JPH0524669B2 JPH0524669B2 (en) | 1993-04-08 |
Family
ID=16675098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62215599A Granted JPS6457728A (en) | 1987-08-28 | 1987-08-28 | Visual inspection device for pellet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6457728A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5168744A (en) * | 1990-09-17 | 1992-12-08 | Sms Schloemann-Siemag Aktiengesellschaft | Apparatus for replacing pressing dies in upsetting press |
| US5570604A (en) * | 1995-01-03 | 1996-11-05 | Rapindex Incorporated | Die transfer system with indexing conveyor supported on a wheeled cart |
| US5659828A (en) * | 1993-12-30 | 1997-08-19 | Olympus Optical Co., Ltd. | Camera |
-
1987
- 1987-08-28 JP JP62215599A patent/JPS6457728A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5168744A (en) * | 1990-09-17 | 1992-12-08 | Sms Schloemann-Siemag Aktiengesellschaft | Apparatus for replacing pressing dies in upsetting press |
| US5659828A (en) * | 1993-12-30 | 1997-08-19 | Olympus Optical Co., Ltd. | Camera |
| US5570604A (en) * | 1995-01-03 | 1996-11-05 | Rapindex Incorporated | Die transfer system with indexing conveyor supported on a wheeled cart |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0524669B2 (en) | 1993-04-08 |
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