27

Shutter Values (White Paper) after SROM download

At Z = 2.4mm, 1100cpi, Circule@7.5” diameter, Speed = 6 ips

Mean Shutter vs Z (White Paper) after SROM download

1100cpi, Circle@7.5" diameter, Speed=6ips

0

50

100

150

200

250

300

- 0.8

- 0.6

- 0.4

- 0.2

0

0.2

0.4

0.6

0.8

1

Delta from Nominal Focus (mm)

Avg-3sigma

Avg

Avg+3sigma

0

20

40

60

80

100

1

50

99 148 197 246 295 344 393 442 491 540 589 638 687 736 785 834 883

Count

Shutter_Lower

Address: 0x0B

Access: R

Reset Value: Undefined

Bit

76543210

Field

S7

S6

S5

S4

S3

S2

S1

S0

Shutter_Upper

Address: 0x0C

Access: R

Reset Value: Undefined

Bit

76543210

Field

S15

S14

S13

S12

S11

S10

S9

S8

Data Type: 16-bit unsigned integer

USAGE:

Units are clock cycles of the internal oscillator (nominally 50MHz). Read Shutter_Upper first, then Shutter_

Lower. They should be read consecutively. The shutter is adjusted to keep the average pixel values within

normal operating ranges. The shutter value is checked and automatically adjusted to a new value if needed

on every frame when operating in default mode.

Shown below is a graph of 900 sequentially acquired shutter values, while the sensor was moved slowly over

white paper.

Figure 20. Shutter Values (White Paper)

Figure 21. Mean Shutter vs. Z (White Paper)

PixArt Imaging Inc.

Track-on-Glass Laser Sensor

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PixArt Imaging Inc.