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III- 21 Programming Manual Part III Inspection Algorithm 1.9.3 Setting Procedur e of Shift Inspection Step1: Select a lighting that displays the brightness level difference between OK and NG visually clear from the Light…

III-20

Programming Manual

Part III Inspection Algorithm

1.9 Range

1.9.1 Inspection Overview

Range is the algorithm to subtract the difference between the maximum brightness level and minimum

brightness level within the inspection window. If the range of the brightness level is in the OK range,

the result will be OK. Range is suitable for shift or polarity inspections of IC components.

1.9.2 Parameter Setting

Figure 1-23 Range

Parameter Description

Lighting

For a shift inspection, select a lighting that displays that the brightness level

difference between OK and NG visually clear.

For a polarity inspection, select a lighting that displays a polarity visually clear.

Algorithm Select Range.

Averaging X[dot],

Averaging Y[dot]

Default is 2.

Enlarge a value to reduce effects of dusts or noises.

Option Enter 0.

Shift[V1-V8]

Enter the appropriate vector. Any value from V1 to V8 is available.

Select the vector according to the Memorize to ﬁ eld of the Adjust window.

Memorize to -

Upper, Lower

Calculates a value intermediate between OK sample value and NG sample value.

If OK sample value is smaller than NG sample value, enter intermediate value in

the Upper ﬁ eld and 0 in the Lower ﬁ eld.

If NG sample value is smaller than OK sample value, enter 255 in the Upper ﬁ eld

and intermediate value in the Lower ﬁ eld.

Sample Shows the brightness level range of the inspection window.

The graph in the lower

right side of the dialog

The Histogram of Luminance bar graph shows the number of pixels every

brightness levels.

Table 1-9 Parameter of Range

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Programming Manual

Part III Inspection Algorithm

1.9.3 Setting Procedure of Shift Inspection

Step1: Select a lighting that displays the brightness level difference between OK and NG visually

clear from the Lighting drop-down list.

Step2: Make sure of the OK brightness level.

NOTE

Sample value is the brightness level range of the inspection window.

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㪐㪇

㪎㪇

㪏㪇㪏㪇

㪏㪇

㪎㪇㪎㪇

㪍㪇

㪎㪇

㪉㪉㪇

㪉㪋㪇㪐㪇

㪏㪇㪉㪈㪇

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㪉㪊㪇㪎㪇

㪉㪈㪇㪍㪇

Lead

OK Inspection Window

NG Inspection Window

Max Brightness

Level[90]

Minimum Brightness

Level[60]

Value[30]

Sample

Max Brightness

Level[240]

Minimum Brightness

Level[60]

Value[180]

Sample

Figure 1-24 Calculation of Sample Value

Step3: Make sure of the NG brightness level. Set the value in between the OK sample value and

the NG sample value as OK range.

Step4: Calculate a value intermediate between OK sample value and NG sample value.

CAUTION

Change the lighting if there is no difference between OK sample value and NG sample

value with default lighting.

0 255

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Intermediate Value

OK Sample Value NG Sample Value

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Figure 1-25 Calculation of Intermediate Value

Step5: If OK sample value is smaller than NG sample value, enter intermediate value in the

Upper ﬁ eld and 0 in the Lower ﬁ eld. If NG sample value is smaller than OK sample value,

enter 255 in the Upper ﬁ eld and intermediate value in the Lower ﬁ eld.

Step6: Enter the appropriate vector into the Shift ﬁ eld by selecting from V1 to V8 according to the

vector used in the Memorize to ﬁ eld in the Adjust window.

Step7: Press Inspect. Make sure that the inspection is completed properly.

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Programming Manual

Part III Inspection Algorithm

1.9.4 Setting Procedure of Polarity Inspection

Step1: Select a lighting that a polarity is visually clear from the Lighting drop-down list.

Step2: Adjust the Range inspection window position to surround the polarity mark.

Figure 1-26 Inspection Window for Polarity Inspection

Step3: Make sure that the sample value is in the OK range.

If it is out of OK range, adjust value in the Lower ﬁ eld.

NOTE

Sample value is the subtracted value between maximum and minimum brightness

level inside the inspection window.

Step4: Enter the appropriate vector into the Shift ﬁ eld by selecting from V1 to V8 according to the

vector used in the Memorize to ﬁ eld in the Adjust window.

Step5: Press Inspect. Make sure that the inspection is completed properly.