Laser Beam Printer - Rotational Jitter of the Mirror, Accuracy of mirror surface, Fixed accuracy of Polygon scanner mirror

Items TA320 Advantage
Rotational Jitter of Mirror Time Variation Display → Analysis of Rotational Deviation
Accuracy of Mirror Surface
Continuous measurement
→ Possibility to evaluate the entire surface of the mirror
Fixed Accuracy of mirror
HIgh Resolution
→ Evaluation of high resoulution

Rotational Jitter of the mirror/Accuracy of mirror surface

Tm Ta320 22

The reflection at the point A on a mirror surface is detected by Detector A, and the other reflection at point B on the same surface is detected by Detector B.
Rotational jitter of the motor, which is fixed with polygon mirror, is evaluated with a Time-interval measurement (A to B) using the TA320. Transient analysis of motor is available using the time variation display of the TA320.

TA320 Setting

  • Function : Time interval
  • Display : Time variation

Example
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Long term jitter indicates rotational jitter of the motor.
Short term jitter measures the data from one rotation of the mirror, so the deviation made by each surface distortion can be evaluated.

Fixed accuracy of Polygon scanned mirror

Set up

Tm Ta320 24

If the Polygon scanner mirror is fixed with any tilt, the reflected laser beam through the V-slit is modulated by the tilt.
TA320 can analyze the tilt by measuring the pulse width.

TA320 Setting

  • Function : Pulse width

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TA320 Zeitintervall-Analysator

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