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Focus Control
Focus control is a key component for microscope automation. Almost any microscope automation application can benefit from control of the focus. Of course not all requirements for motorized focus are the same. LEP offers different options and technologies to suit the application: a simple motor for basic automated or remote focusing, add-on encoder systems for more precision and stability, and piezo driven nano-precision focusing for the highest performance.
Linear Encoder Option
Strict motor control or the microscope focus is subject to deficiencies inherent in the microscope mechanics are not accurate to the sub-miron level. When trying to position a stage to a programmed z-height with the sub-micron precision the typical microscope will show problems with either repeatability, accuracy or both.
The LEP linear encoder focus option provides a means to enhance the microscope focus with an accurate, repeatble focus position encoder. This encoder measures the actual z-position of the stage.
Each microscope requires a custome bracket to mount the encoder. In almost every case the encoder is mounted to the microscope using existing mounting holes, and does not interfere with the normal operation of the micrscope.
The linear focus encoder works in conjuction with the focus drive motor. Operation is transparent. The MAC 6000 control system can also be programmed to servo the z-position to the encoder input to compensate for drift or vibration effects. |
