Optical micrometers, development and fabrication

1D 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

RF656

RF656XY

RF651 Series

direct through beam micrometers
long distance between transmitter and receiver

Measuring ranges, mm:

25, 50, 75, 100

Accuracy, µm:

± 5…20

Maximum scanning frequency, Hz:

2000

See detailed specifications →

RF656 Series

high precision micrometers with telecentric lenses

Measuring ranges, mm:

5, 10, 25, 50, 75, 100

Accuracy, µm:

± 0,3…5

Maximum scanning frequency, Hz:

2000, 10000

See detailed specifications →

RF656XY Series

high precision two-axis micrometers

Measuring ranges, mm:

5, 10, 25, 50, 75, 100

Accuracy, µm:

± 0,3…5

Maximum scanning frequency, Hz:

2000, 10000

See detailed specifications →

1D Optical Micrometers RF65x. Specification

RF65x-		RF651-25	RF651-50	RF651-75	RF651-100	RF656-5	RF656-10	RF656-25	RF656-50	RF656-75	RF656-100
Measurement range, mm		25	50	75	100	±1х5	±3х10	±5х25	±7x50	±9x75	±10x100
Minimum size of the object, mm		0,5	1	1,5	2	0,05(0,1)	0,1(0,2)	0,25(0,5)	0,5(1)	0,75(1,5)	1(2)
Accuracy* , um		±5	±10	±15	±20	±0,3	±0,5	±1	±2	±3	±5
Measurement frequency, Hz		500	500	500	500	500	2000	2000	2000	2000	2000
Light source		LED
Laser safety class		1 (IEC60825-1)
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
Housing materia		aluminum
Weight (without cable), gram		600	2000	2600	4000	700	700	700	1600	3200	4500
Output interface	digital	RS232 (max. 921,6 kbit/s) or RS485 (max. 921,6 kbit/s) or Ethernet & (RS32 or RS485)
Output interface	analog

* 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

1D Optical Micrometers RF65xy. Specification

RF65xy

RF656xy-5

RF656xy-10

RF656xy-25

RF656xy-50

RF656xy-75

RF656xy-100

Measurement range, mm

±1х5

±3х10

±5х25

±7x50

±9x75

±10x100

Minimum size of the object, mm

0,05(0,1)

0,1(0,2)

0,25(0,5)

0,5(1)

0,75(1,5)

1(2)

Accuracy* , um

±0,3

±0,5

±1

±2

±3

±5

Measurement frequency, Hz

500

2000

Light source

LED

Laser safety class

1 (IEC60825-1)

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

Housing materia

aluminum

Weight (without cable), gram

1500

1300

2600

6900

10500

13500

Output interface

digital

RS485 (max. 921,6 kbit/s) or Ethernet & RS485
4…20 mA (load ≤ 500 Ohm) or 0…10 V

analog

* 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

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 LED 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).

High precision noncontact measurements:

Large Width / Diameter

Gaps

Dual axis

Object/Target Displacements

Object Recognition

Diameter and Profile

Pipe diameter control, SKD-MHs system

Find the deailed information about this device here.

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 information for 1D Optical Micrometer RF651

RF651-X/L-SERIAL-ANALOG-LOUT-IN-СС-M-AK

Symbol	Description
X	Measurement range, mm
L	The distance between the transmitter and receiver housings, fixed on the beam, mm
SERIAL	The type of serial interface: RS232 - 232 or RS485 - 485 or (Ethernet and RS232) – 232-ET or (Ethernet and RS485) – 485-ET
ANALOG*	Attribute showing the presence of 4…20 mA ( I ) or 0…10V ( U )
LOUT*	Attribute showing the presence of logical outputs
IN	Trigger input (input of synchronization) presence
CC	Сable connector - CC
М	Cable length, m
AK	Micrometer with protect air knife for windows

* It is possible to order modifications only with the logical output or with the analog output.

Example: RF651-25/50-232-I-IN-СC-3 – measurement range – 25 mm, distance between transmitter and receiver – 50 mm, RS232 serial port, 4…20mA analog output, trigger input is available, cable connector, 3 m cable length.

Order information for 1D Optical Micrometer RF656

RF656-X-SERIAL-ANALOG- LOUT- IN-СС-M-AK

Symbol	Description
X	Measurement range, mm
L	Distance between transmitter and receiver, mm
SERIAL	The type of serial interface: RS232 - 232 or RS485 - 485 or (Ethernet and RS232) – 232-ET, or (Ethernet and RS485) – 485-ET
ANALOG*	Attribute showing the presence of 4…20 mA ( I ) or 0…10 V ( U )
LOUT*	Attribute showing the presence of 3 logical outputs
IN	Trigger input (input of synchronization) presence
CC	Сable connector - CC
М	Cable length, m
AK	Micrometer with protect air knife for windows

* It is possible to order modifications only with the logical output or with the analog output.

Example: RF656-25/50-232-I-IN-СС-3 – measurement range – 25 mm, distance between transmitter and receiver – 50 mm, RS232 serial port, 4…20 mA analog output, trigger input is available, cable connector, 3 m cable length.

Order information for 1D Optical Micrometer RF656

RF656XY-X-SERIAL-ANALOG- LOUT- IN-AL-СС-M-AK

Symbol	Description
X	Measurement range, mm
SERIAL	The type of serial interface: RS485 - 485 or (Ethernet and RS485) – 485-ET
ANALOG*	Attribute showing the presence of 4…20 mA ( I ) or 0…10 V ( U )
LOUT*	Attribute showing the presence of 3 logical outputs
IN	Trigger input (input of synchronization) presence
CC	Сable connector - CC
М	Cable length, m
AK	Micrometer with protect air knife for windows

* It is possible to order modifications only with the logical output or with the analog output.

Example: RF656XY-25-485-I-IN-СС-3 – measurement range – 25 mm, RS485 serial port, 4…20 mA analog output, trigger input is available, cable connector, 3 m cable length.