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HOME ⊙ ZYGO ⊙ Zygo’s ZMI 2000 System Displacement Measuring Interferometer Systems
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Zygo’s ZMI 2000 System Displacement Measuring Interferometer Systems

F: | Au:FAN | DA:2025-10-28 | 715 Br: | 🔊 点击朗读正文 ❚❚ ▶ | Share:

Zygo’s ZMI 2000 System Displacement Measuring Interferometer Systems

Displacement Measuring Interferometry improves positioning accuracy.  Zygo’s ZMI 2000 is the industry’s top performing Displacement Measuring Interferometer (DMI) System offering the highest resolution, the highest velocity, and lowest data age uncertainty for real time position control.  Zygo, a world-class interfero metric metrology company, supports you at all levels of design, engineering and manufacturing.  Zygo works as an extension of your research, engineering and  manufacturing teams in providing metrology solutions.

Performance Benefits of the ZMI 2000

• Positioning accuracy – Velocity and time dependent errors are eliminated.  All axes of motion are synchronized to an uncertainty of ≤1.7 ns.
•Overlay accuracy – λ/2048 resolution(0.31 nm) with 2 pass interferometers for excellent overlay and alignment capability.
• System throughput – Slew rates of 2.1 m/s with 2 pass interferometers enabled by the 20 MHz heterodyne split frequency.ZMI 2000 Systems are found in the most demanding feedback control applications:
• Lithography tools: optical steppers and scanners,e-beam and laser mask writers.
•Mask, wafer and LCD inspection and measurement tools, CD-SEM’s.
• Process equipment, memory repair tools.Integration Benefits of the ZMI 2000 for real-time position control

•Reduce heat, cost and ESD sensitivity, improved electrical isolation, and minimal package size 

Fiber optic cables are used on both the reference and measurement legs.

•Reduce cost in backplane space requirements
The ZMI 2002 offers two axes of interferometry on a single 6U VME board.

•Reduced design costs with simplified integration time 

The measurement boards are fully programmable through the interface bus (VME or ISA), or the P2 interface.

•Reduced cost of integration – Standard hardware interfaces for up to 7.7 MHz P2 data rates for up to 16 axes.  

Easily expanded to accommodate more axes at the same rates.

The ZMI 2000 as a Metrology System Unparalleled performance and flexibility.  

All of the performance benefits of the ZMI 2000 with the following integration options:

• ZMI Systems Chassis with PCI-VME for processor speed real-time data,
• ZMI Systems Chassis with serial or GPIB interface for more cost effective solutions,

• ZMI PC for integration into an ISA slot.ZMI 2000 Systems are in use in Standards Labs worldwide for applications in measurement and calibration of high resolution and high frequency mechanical motions:

• Piezo transducer calibration,
• Linear Scale calibration,
• Rotary Scale calibration,
• AFM stage calibration.

The ZMI 2000 System Laser Head

The laser source may be the single most critical component of the Displacement Measuring Interferometer.  

To control and assure laser head quality, Zygo manufactures our own laser tubes.

The proprietary tube design, combined with a state-of-the-art assembly and test facility, provides for a highly reliable laser head with:
• > 50,000 hour lifetime,
• Longest basic warranty at 18 months,
• Extended warranties of up to 5 years,
• Up to 8 axes of interferometry on a single head,
• Multiple head synchronization.


ZMI 2000 System Integration Features

• Optical power monitor for the laser head output,and measurement board input.
• Built in laser head diagnostics.
• Position, time, and velocity, all available independently on the P2, or VMEbus.
• Programmable synchronization signal.
• Measurement boards can be used in any standard 6U VME or ISA backplane.
The ZMI 2000 System technology combined with our world-class opto-mechanical design and manufacturing center in Middlefield, CT makes Zygo Corporation a key partner in the successful design, manufacture, and integration of your real-time position control systems.


ZMI 2000 System Performance

4 Pass PMI*、 2 Pass PMI、1 Pass LI**
Position Resolution： λ/4096 (0.15 nm)、 λ/2048 (0.31 nm)、 λ/1024 (0.62 nm)
Position Range： ± 5.3 m、 ±10.6 m、± 21.2 m
Velocity Limit： 1.05 m/s、 2.1 m/s、 4.2 m/s
Maximum Acceleration：980 m/s2, (100 g)
Data Age: 335 ns
Data Age Uncertainty
Two Axes: Uncompensated, ±15 ns (ZMI 2001) / ±12 ns (ZMI 2002) / ± 16 ns (ZMI PC)
Compensated, ±1.2 ns (ZMI 2001, ZMI 2002)
Compensated, ±1.5 ns (ZMI PC)
Three Axes: Uncompensated, ±19 ns (ZMI PC)
Compensated, ±1.7 ns (ZMI PC)
Eight Axes: Uncompensated, ±36 ns (ZMI 2001) / 22 ns (ZMI 2002)
Compensated, ±1.4 ns (ZMI 2001, ZMI 2002)
ZMI 2000 System Laser Head
Type:HeNe, cw, two frequency
Power Minimum / Typical： 425 µW / 600 µW Will support up to 8 axes
Lifetime: >50,000 hrs, 18 month warranty
Frequency split:20 MHz ± 1600 Hz
Vacuum Wavelength Accuracy:±0.1 ppm (lifetime)
Vacuum Wavelength Stability: ±0.01 ppm (24 hrs)
Reference Signal: Fiber Optic


ZMI 2000 System Measurement Boards

# of Axes per Board: 1 (ZMI 2001, ZMI PC) / 2 (ZMI 2002)
Power Requirement:+5V ± 5% @ 3.5A (ZMI 2001, ZMI 2002, ZMI PC)+12V ± 10% @ 0.1A (ZMI PC)
Position Format: 36 bit - 2’s complement
Velocity Format: 32 bit - 2’s complement
Time Range: 107.4 seconds
Time Format:32 bit - 2’s complement
Time Resolution: 25 ns
Fiber Optic Signals: Reference and Measurement
Error Status: Reference (signal, PLL, DLL)
Measure (Missing, Dropout, Glitch)
Velocity (Board, User Defined)
Acceleration
Overflow (32 bit, 36 bit)
System Synchronization: Clock in or Clock out
ZMI VME Compliance: VMEBus specification revision C.1
6U size
A16 or A24 addressing
D16 or D32 data transfer
D08 (0) interrupt acknowledge cycle
ZMI PC Compliance：UL94V0
Full length ISA card
16 bit ISA bus
32 bit P2 bus



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