Laser encoder measurement system
Performance, versatility, ease of use
HPI-3D linear laser encoder measurement system is the result of more than 20 years of experience in of high-precision laser interferometry field. The interferometer represents a “know-how” in the field of laser measurements and with the best parameters. All this goes along with the highest quality, a very rich set of accessories and options, ease of use and compactness. Instructions and full version of the software are available in our download page.
Interferometer features
100 pm natural resolution
Basic resolution of the laser interferometers based on He-Ne laser is 158.2 nm. The HPI-3D uses a special combination of heterodyne and homodyne optical configurations to achieve a basic resolution of 100 pm for single-pass optics and 50 pm for double-pass optics with excellent sub-nanometric measurement linearity. HPI-3D signal processing path provides the highest resolution at any measured speed.
Vibration measurements up to 100 kHz
Dynamic measurements up to 100 000 samples per second
Max measurable velocity up to +/- 7m/s


User friendly software
Free software updates
Easy to align and position
Laser beam position system
Compact construction
Portability in a small sturdy case
Wide range of optical components
Configurable encoder output
Open communication protocol
User configurable input/output
3D machine geometry estimation
Wireless sensors
Electronic spirit level option
Performance
Interferometer encoder HPI-3D can measure moving objects with velocity up to 7 m/s with standard resolution of 100 pm. Automatic compensation for environmental conditions is performed 100,000 times per second. Frequency vibrations up to 50 kHz can be easily measured. Even better parameters are available upon request!
Versatility
Although there is no universal measurement device, the HPI-3D comes close. The instrument can be used to measure long (tens of meters), extremely short (hundreds of pico-meters) distances and geometry of the machine, to detect very fast and indefinitely slow movements. The system can monitor vibrations, measure angles, compare distances and many more. The laser device can be used in scientific laboratories, machinery industry workshops and outdoors. Not only can it be controlled by computer, tablet or smartphone, but user can modify its functionality in many ways.Ease of use
The HPI-3D was designed with an emphasis on ease of use and portability. The instrument has built-in wireless connectivity and can work with or without a PC connection. It can be mounted directly on the measured object (e.g. inside a machine) simplifying the measurement path and saving alignment time. The laser is available in a small, rugged carrying case that offers excellent portability. The easy-to-use and powerful PC software makes using the entire device an easy task even for inexperienced users.

Application
Software
Elements
Specification
Application
Measurements | Servicing |
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Software
- NEW!!! Integration with high precision electronic spirit level
- Easy to use yet with rich functionality
- One software for all applications – unified interface and simplicity of use
- Extensive support for measurement results analysis
- Measurement errors calculated according to world standards like ISO230-2
- Automatic generation of CNC machine compensation files. Compatibility with most popular machine controls
- Integrated tool for CNC path generation
- Direct link to Microsoft (c) Excel and OpenOffice Calc
- Export of data to csv compatible file
- Multiple languages in standard installation pack
- Ease of adding new languages
- Software distributed as freeware
- Free software updates avaialble through our webpage
- Available for Microsoft (c) Windows operating system
- Drivers for Linux, Android (c) and MacOS (c) available
- Communication protocol description available
- LabView (c) libraries available
- Full version of software with demo/simulator mode available
Elements
Complete Laser Interferometer HPI-3D consists of all components necessary to operate the device i.e.:
- Frequency stabilized laser head with integrated measurement, environmental compensation and encoder output paths
- Optical components for single pass linear measurement
- High quality tripod with precision elements for laser head adjustments
- Wirelss environmental sensors
- PC software
- Special, sturdy suitcase for complete laser interferometer system transportation
Options:
- Optics for machine base straightness measurements
- Optics for measurement of small angles
- Elements for checking rotary axes
- Optics for flatness measurement
- Optics for straightness of movement measurement
- Optics for perpendicularity measurement – 3D method
- Optics for perpendicularity measurement – Wollaston method
- “Double-pass” optics for differential measurement
- Optics for measurement from flat mirror or very small retroreflector
Specification
Main specifications:
Parameter | Range |
Laser type | He-Ne laser with frequency stabilisation |
Wavelength accuracy | ± 0.005ppm |
Short term stability | ± 0.001ppm |
Long term stability | ± 0.001ppm |
Output power | 900µW |
Maximum axis length | 80m (linear optics) |
Maximum velocity | ± 7m/s (linear optics) |
Resolution | 100 pm |
Laser source MTBF | 20000 hours |
Compensation of environmental conditions | Real time compensation with wireless sensors 1x air temperature sensor 1x air humidity sensor 1x air pressure 3x material temperature sensor |
Size | 45mm x 70mm x 255mm – laser head 30mm x 60mm x 145mm – power supply |
Weight | 1200g – laser head 500g – power supply |
Measurement specifications:
Measurement | Range | Resolution | Accuracy |
Distance | 0 – 30m | 100pm | 0.4 µm/m |
Velocity | 0 – 7m/s | 0.25 µm/s | 0.1 % |
Angular | 0 – 3600 arcsec | 0.001 arcsec | ± 0.1 ppm |
Straightness – angular optics | 0 – 15 m | 0.01 µm (for 100mm base) | ± 0.2 % |
Straightness – Wollaston prism | 0.3 – 9 m Vertical range ±30 mm | 0.01 µm | ± 0.5 % * L µm |
Straightness – 3D optics | 0 – 6 m | 0.1 µm | ± (10 + 10 * L)µm |
Flatness | 0 – 15 m Vertical range ± 2 mm | 0.01 µrad (for 100mm base) | ± 0.2 % * L |
Squareness | ± 1000 arcsec | 0.01 µm | ± 0.5 arcsec |
Rotary | ± 720° | 0.04 arcsec | ± 0.2 % |