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Optical Micrometers/Classification |
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Overview |
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Thrubeam measuring instruments measure the outer diameter, height, width, or thickness of an object, etc. These instruments can also be used for runout, positioning, and dimension measurement. The measurement method includes:
1. Laser beam scans a target, and the target dimension is calculated based on the timing of the shadow produced due to laser beam interruption by the target.
2. A beam of light converges into a parallel beam and is projected onto a target. The shadow produced due to light being interrupted by the target is detected using a CCD image sensor or photodiode. Operating principles and features of devices using the laser scanning method and the CCD or photodiode method are described below. |
Classification |
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| Detection method |
High-accuracy CCD method |
Scanning method |
CCD method |
Two-dimensional CCD method |
| Features |
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High speed, high accuracy. |
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Transparent target measurement is possible. |
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High-speed resolution and high accuracy |
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Transparent target measurement is possible. |
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High-speed sampling |
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Simultaneous measurements at multiple points on a plane |
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Measurement of inner diameter, radius, angle, etc. |
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| Appearance |
Sensor head |
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Controller
(or amplifier) |
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Dedicated measurement software for PC is used. |
| Model |
LS-7000 Series |
LS Series |
VG Series |
VM Series |
Item
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Resolution |
0.01µm |
0.05µm |
1µm |
1µm |
| Measuring accuracy |
±0.5µm |
±2µm |
0.1％ of F.S.
(FS＝30mm) |
±5µm |
| Measuring range |
0.002 to 1.18in |
0.003 to 4.72in |
0.02 to 1.38in |
0.01 to 1.57in |
| Sampling rate |
2400 scans/s |
1200 scans/s |
780 scans/s |
About 1 second |
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