With a resolution of 0.01m and a 2400 per second sample speed, Keyence’s new range of high-speed, high-accuracy intelligent micrometers is a breakthrough in optical technology.
The LS-7000 Series makes use of a new optical system coupled with digital processing involving uniform, stable light emitted from a gallium nitride (GaN) LED passing through a telecentric optical system before being received by a linear CCD (HL-CCD). The signal is then digitally processed for output.
At the heart of the new system is the measuring head. Its telecentric optical system uses only parallel light to form an image. This is said to prevent fluctuation in lens magnification due to a change in target position and ensures accurate measurement.
The HL-CCD reportedly allows continuous exposure to all received light, which in turn enables the extremely fast sampling rate. Another important part of the measuring head is the monitor camera, which incorporates a CMOS image sensor to give users a realistic image.
The GaN LED produces a safe, uniform light containing little noise while a diffusion unit built into the measuring head distributes the light and ensures more uniform exposure of the target.
The LS-7000 Series is said to have a number of major advantages over conventional laser scan micrometers, which are often affected by heat and vibration from the motor in the sensor head together with interference from the laser diode.
This leads to poor repeatability. With its advanced LED and CCD technologies, the LS-7000 Series achieves twice the repeatability and measurement speed of other micrometers. Another advantage is that the HL-CCD takes a continuous average value measurement rather than having the gaps in detection which hinder conventional laser scanning techniques.
The LS-7000 Series includes a controller with on-board statistical analysis tools. All necessary interfaces are included – RS-232C output, BCD two-channel output, I/O two-channel output and analogue two-channel output.