Optical Rotary Encoders

An optical rotary encoder is an angular position sensor. It converts an angular displacement directly into a digital form. There are usually three components in an optical rotary encoder: a light source (an LED), a sensor and a moveable disk.


How an optical rotary encoder works


Optical rotary encoders have a shaft mechanically coupled to an input driver. This driver rotates a disc fixed onto it which is marked with a succession of opaque and clear segments.

Light from infrared emitting diodes reaches the infrared receivers through the transparent slits of the rotating disc, creating an analogue signal. The signal is then amplified electronically and converted into digital form. This is then transmitted to the data processor. 


Uses for optical rotary encoders 


Optical rotary encoders make precise digital signals. This makes them a good option where image resolution matters, and explains their use in applications as varied as office equipment (in computer mice and photo copiers) and medical devices. 


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Description Price Pulses Per Revolution Encoder Reading Encoder Signal Supply Voltage Shaft Diameter Mounting Hole Diameter Shaft Length Mounting Type Shaft Style Termination Style Maximum Operating Speed Current Rating
RS Stock No. 878-0464
Mfr. Part No.62S22-M5-050C
BrandGrayhill
kr 423,03
Each
Units
- Quadrature 2-Bit Quadrature 5V dc 6.32 mm - 17.45mm Panel Mount Flat Center Ribbon Cable with Connector - 25 mA @ 5.25 V dc
RS Stock No. 178-3264
Mfr. Part No.HEDS-6140#B09
BrandBroadcom
kr 237,581
Each (In a Box of 100)
Units
1000 Incremental - - 0.5 in - - Through Hole - - 30000rpm -
RS Stock No. 878-0537
Mfr. Part No.61R128
BrandGrayhill
kr 891,02
Each
Units
128 Quadrature 2-Bit Quadrature 5V dc 6.32 mm - 18.4mm Surface Mount Flat Pin 300rpm 30 mA @ 5 V dc
RS Stock No. 878-0530
Mfr. Part No.25LB22-G
BrandGrayhill
kr 57,53
Each
Units
- Absolute Gray Code - 6.35 mm - 19.05mm Panel Mount Flat - - 1.5 mA @ 115 V ac, 150 mA @ 14 V dc, 250 mA @ 28 V dc
RS Stock No. 878-0580
Mfr. Part No.62N22-P
BrandGrayhill
kr 979,45
Each
Units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 26.9mm Panel Mount Flat Pin 100rpm 30 mA @ 5 V dc
RS Stock No. 878-0628
Mfr. Part No.61B11-01-02-020
BrandGrayhill
kr 627,91
Each
Units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 17.4mm Panel Mount Flat Cable 16.6 rpm @ 30 mS 30 mA @ 5 V dc
RS Stock No. 878-0467
Mfr. Part No.62S22-M0-050C
BrandGrayhill
kr 567,29
Each
Units
- Quadrature 2-Bit Quadrature 5V dc 6.32 mm - 17.45mm Panel Mount Flat Center Ribbon Cable with Connector - 25 mA @ 5.25 V dc
RS Stock No. 202-4400
Mfr. Part No.REC20-25-201-1
kr 1 313,15
1 Box of 5
Box(es)
25 Incremental Digital Square Wave 5V dc 20 mm - - Panel Mount Slotted - - -
RS Stock No. 202-4408
Mfr. Part No.RES20-50-200
kr 271,21
Each
Units
50 Incremental - 5V dc 20 mm - - Through Hole Slotted Pin - -
RS Stock No. 878-0565
Mfr. Part No.61RS128-080
BrandGrayhill
kr 1 031,10
Each
Units
128 Quadrature 2-Bit Quadrature 5V dc 6.32 mm - 18.4mm Surface Mount Flat Pin 300rpm 30 mA @ 5 V dc
RS Stock No. 202-4396
Mfr. Part No.REC16L25-205-B
kr 1 004,92
1 Box of 5
Box(es)
25 Incremental Digital Square Wave 5V dc 16 mm - - Through Hole Flat - - -
RS Stock No. 878-0445
Mfr. Part No.62AG22-L5-P
BrandGrayhill
kr 225,02
Each
Units
- Quadrature 2-Bit Gray Code 5V dc 6.32 mm - 17.45mm Panel Mount Flat Center Pin 100rpm 30mA
RS Stock No. 202-4403
Mfr. Part No.REC20C-50-201-1
kr 1 824,32
1 Box of 5
Box(es)
50 Incremental Digital Square Wave 5V dc 20 mm - - Panel Mount Slotted - - -
RS Stock No. 878-0505
Mfr. Part No.62C1111-01-060C
BrandGrayhill
kr 971,18
Each
Units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 26.98mm Panel Mount Flat Connector 100rpm 50 mA @ 5 V dc
RS Stock No. 796-7834
Mfr. Part No.HEDS-5140#A11
BrandBroadcom
kr 217,97
Each
Units
500 Incremental - - 4 mm - - Through Hole - - 30000rpm -
RS Stock No. 202-0446
Mfr. Part No.RE30E-360-213-1
kr 458,52
Each
Units
360 Incremental Digital Square Wave 5 - 12V dc 4 mm - - Panel Mount Plain Cable - -
RS Stock No. 878-0583
Mfr. Part No.62N30-P
BrandGrayhill
kr 979,45
Each
Units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 26.9mm Panel Mount Flat Pin 100rpm 30 mA @ 5 V dc
RS Stock No. 202-0443
Mfr. Part No.RE30E-1024-213-1
kr 636,83
Each
Units
1024 Incremental Digital Square Wave 5 - 12V dc 4 mm - - Panel Mount Plain Cable - -
RS Stock No. 878-0555
Mfr. Part No.62A15-02-060C
BrandGrayhill
kr 312,16
Each
Units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 17.44mm Surface Mount Flat Connector 100rpm 30mA
RS Stock No. 878-0631
Mfr. Part No.60AR18-4-060C
BrandGrayhill
kr 1 121,03
Each
Units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm 17.25mm 21.67mm Surface Mount Flat Connector 100rpm 20 mA @ 5 V dc (Rotary), 5 (Joystick) mA