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Optical Micrometers

Optical micrometers use a “shadow” measurement principle whereby collimated laser light is transmitted towards a receiver.  The edges of the shadow cast by an object in the beam’s path are accurately measured by the detector array inside the receiver unit.  Optical Micrometers are non-contact devices that ideally measure diameters of wires, rods and other cylinders in addition to gaps, edge positions and dimensional characteristics of geometric objects. 

The series includes two lines of models: RF651 -  direct through beam micrometers and RF656 – high precision through beam micrometers with telecentric lens

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Models
  • RF 651 Series

    RF 651 Series

    • direct through beam micrometers
    • long distance between transmitter and receiver

      Measuring ranges, mm: 25, 50, 75, 100
    Accuracy, µm: ± 3…20
    Measuring rate, kHz: 2, 10

     

     

     

     

    See detailed specifications →
  • RF 656 Series

    RF 656 Series

    • high precision micrometers with telecentric lenses

      Measuring ranges, mm: 5, 10, 25
    Accuracy, µm: ± 0,3…1
    Measuring rate, kHz: 2, 10

     

     

     

     

    See detailed specifications →
Specifications

Optical Micrometers RF651. Specification

RF651- 25 50 75 100
Measurement range, mm 25 48 75 98
Minimum size of the object, mm 0.5 1 1.5 2
Accuracy*, um ±5 ±10 ±15 ±20
Max measurement frequency, Hz 2000 2000 2000 2000
Light source LED or laser
Laser safety class 1  (IEC60825-1)
Output interface:
  digital RS232 (max. 921,6 kbit/s) or RS485 (max. 921,6 kbit/s)
or Ethernet & (RS32 or RS485)
analog 4…20 mA (load ≤ 500 Ohm) or 0…10 V
Synchronization input 2,4 – 5 V (CMOS, TTL)
Logic output three outputs, NPN: 100 mA max; 40 V max
Power supply, V 24 (9 …36)
Power consumption, W 1,5..2
Environment resistance:
  Enclosure rating IP67
Vibration 20g/10…1000Hz, 6 hours, for each of XYZ axes
Shock 30 g / 6 ms
Operation temperature, °С -10…+60
Relative humidity 5-95% (no condensation)
Housing material aluminum
Weight (without cable), gram 600 2000 2600 4000

* Typical data obtained when a knife edge was used to interrupt the beam and distance between transmitter and receiver is equal of two measurement range.

Optical Micrometers RF656. Specification

RF656- 5 10 25
Measurement range, mm ±1х5 ±3х10 ±5х25
Minimum size of the object, mm 0.03 0,05 0,1
Transmitter-Receiver distance 25 56 63
Accuracy*, um ±0,3 ±0,5 ±1
Max measurement frequency, Hz 2000 10000 10000
Light source LED
Lase safety class 1  (IEC60825-1)
Output interface:
  digital RS232 (max. 921,6 kbit/s) or RS485 (max. 921,6 kbit/s)
or Ethernet & (RS32 or RS485)
analog 4…20 mA (load ≤ 500 Ohm) or 0…10 V
Synchronization input 2,4 – 5 V (CMOS, TTL)
Logic output three outputs, NPN: 100 mA max; 40 V max
Power supply, V 24 (9 …36)
Power consumption, W 1,5..2
Environment resistance:
  Enclosure rating IP67
Vibration 20g/10…1000Hz, 6 hours, for each of XYZ axes
Shock 30 g / 6 ms
Operation temperature, °С -10…+60
Relative humidity 5-95% (no condensation)
Housing material aluminum
Weight (without cable), gram 600 600 600

* Typical data obtained when a knife edge was used to interrupt the beam and distance between transmitter and receiver is equal of two measurement range.

Operation

Model RF651 Operation Principles

The micrometer operation is based on the so-called ‘shadow’ principle. The micrometer consists of two blocks – transmitter, 1 and receiver, 2. Radiation of a semiconductor laser 3 is collimated by a lens 4.  With an object, 5 placed in the collimated beam region, shadow image formed is scanned with a CCD photo-detector array 6. A processor 7 calculates the position (size) of the object from the position of shadow border (s).


 

Model RF656 Operation Principles

The micrometer operation is based on the so-called ‘shadow’ principle. The micrometer consists of two blocks – transmitter, 1 and receiver, 2. Radiation of a red LED 3 is collimated by a lens 4.  With an object, 5 placed in the collimated beam region, shadow image formed by telecentric lens 6 and is scanned with a CCD photo-detector array 7. A processor 8 calculates the position (size) of the object from the position of shadow border (s).

Applications

High precision noncontact measurements:

  • Large Width / Diameter
  • Gaps
 
  • Dual axis
 
  • Object and Target Displacements
 
  • Object Recognition
 
  • Diameter and Profile
 
Video

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Optical Measurement System

In this application of an optical micrometer, a system accurately measure threaded automobile parts for bench-top inspection and quality assurance. Find the deailed information about this device here.

Order info

Order information for Optical Micrometer RF651

Order information for Optical Micrometer  RF651Order information for Optical Micrometer  RF651

Order information for Optical Micrometer RF656

Order information for Optical Micrometer  RF656Order information for Optical Micrometer  RF656

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