User`s manual
Table Of Contents
- Safety Precautions
- Table of contents
- Chapter 1: Outline
- 1-1 Features
- 1-2 Controller
- 1-3 Measurement program
- [1] Positional deviation measurement
- [2] Degree of match inspection
- [3] Lead inspection
- [4] BGA/CSP inspection (IV-S32M/S33M)
- [5] Area measurement by binary conversion
- [6] Object counting by binary conversion
- [7] Object identification by binary conversion
- [8] Point measurements
- [9] Distance and angle measurement
- [10] Multiple position measurement (IV-S33M)
- [11] Multiple degree of match inspection (IV-S33M)
- Chapter 2 : Precautions for Use
- Chapter 3 : System Configuration
- Chapter 4 : Part Names and Functions
- Chapter 5 : Connection and Installation Methods
- Chapter 6 : Setting and Operating Outlines
- Chapter 7 : Simplified Menu Operation
- 7-1 Operation screen
- 7-2 Image display
- 7-3 Setting functions that are different with each controller
- 7-4 Setting procedures
- 7-5 Setting the operation conditions
- 7-6 Setting object types
- 7-7 Setting the shutter speed
- 7-8 Setting the positioning conditions
- 7-9 Setting the existence inspection conditions
- 7-10 Measurement triggering
- 7-11 Saving data
- 7-12 Specify the system conditions
- Chapter 8 : Specifications
- Chapter 9 : Operation Examples
- Glossary
- Appendix
- Alphabetical Index
G-6
Glossary
G
[H]
Ë Halogen lamp
Light source with halogen gas in the bulb. When a halogen lamp is lit, the halogen gas and vaporized
tungsten combine. When the filament is heated, these combined particles reattach to the tungsten, in
stead of being deposited on the glass bulb, so that the original brightness of the lamp is maintained
throughout its life span.
Ë High frequency lighting
If a fluorescent lamp is powered by commercial electricity, it will flicker at 50 Hz or 60 Hz. Since the
CCD scans images at 60 Hz, the brightness of the image may fluctuate due to the flickering of the
fluorescent lamp.
By increasing frequency used to power the fluorescent lamp (employing a high frequency light), this
type interference is eliminated and a stable image can be obtained.
ËË
ËË
Ë Histogram widening
This is a method to widen the histogram for an image in which the histogram only occupies part of the
available scale, thus improving the contrast. For example, in figure 1, the gray level values are concen-
trated in the [a, b] part of the range, and the [0, a] and [b, Zm] parts of the range are not used (the
histogram is not expanded to use all of the gray scalel values). This image has low contrast, since the
image does not use the full dynamic range efficiently. Expand the histogram to cover the entire range of
gray scale values, as shown in figure 2. The contrast will be improved.
(Output) (Application)
Maximum matching level value Shape inspection
The center coordinates where the highest
level of matching is obtained
[Procedures]
1 Store the reference image as a gray scale image with 256 levels of gray.
2 Capture the workpiece image to be measured.
3 Move the captured image of the object so that the upper left corner of the captured image is right
on top of the upper left edge of the reference image. Calculates the level of matching between
the two images, based on the stored gray scale image data.
4 Slide the reference image over one pixel width and then measure the level of matching at that
position.
5 Repeat step 4 above for the whole workpiece image until a good match is found.
Reference image
Search range in the image
Detected image
Ë Gray scale search (corrected gray scale search)
The "gray scale search" function is a system for detecting a point where the input image and the refer-
ence image match, after calculating the matching levels in the input image and the reference image.
Positional deviation measurement
0
Z
m
a
b
0
Z
m
2 Good contrast image
Gray level Gray level
1 Low contrast image