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. 878-0521
Mfr. Part No.25LB22-H
BrandGrayhill
SGD11.36
Each
units
- 2 bit Quadrature Hex 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. 878-0537
Mfr. Part No.61R128
BrandGrayhill
SGD112.36
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. 878-0420
Mfr. Part No.62AG22-L5-060C
BrandGrayhill
SGD28.76
Each
units
- Quadrature 2-Bit Gray Code 5V dc 6.32 mm - 17.45mm Panel Mount Flat Center Ribbon Cable with Connector 100rpm 30mA
RS Stock No. 878-0549
Mfr. Part No.61R128-075
BrandGrayhill
SGD144.91
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. 878-0426
Mfr. Part No.62AG11-L0-060C
BrandGrayhill
SGD27.88
Each
units
- Quadrature 2-Bit Gray Code 5V dc 6.32 mm - 17.45mm Panel Mount Flat Center Ribbon Cable with Connector 100rpm 30mA
RS Stock No. 878-0524
Mfr. Part No.62C2211-02-060C
BrandGrayhill
SGD142.97
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. 878-0489
Mfr. Part No.62S11-M5-050C
BrandGrayhill
SGD55.66
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. 878-0622
Mfr. Part No.61KS64-020
BrandGrayhill
SGD129.22
Each
units
64 Quadrature 2-Bit Quadrature 5V dc 6.32 mm - 18.4mm Surface Mount Flat Pin 300rpm 30 mA @ 5 V dc
RS Stock No. 878-0505
Mfr. Part No.62C1111-01-060C
BrandGrayhill
SGD121.79
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. 878-0599
Mfr. Part No.62V11-01-060C
BrandGrayhill
SGD62.71
Each
units
- Quadrature 2-Bit Quadrature 3.3V dc 6.35 mm - 17.44mm Surface Mount Flat Connector 100rpm 50mA
RS Stock No. 878-0593
Mfr. Part No.62A11-02-040CH
BrandGrayhill
SGD71.80
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 17.44mm Surface Mount Flat Connector 100rpm 30mA
RS Stock No. 878-0530
Mfr. Part No.25LB22-G
BrandGrayhill
SGD10.11
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. 878-0439
Mfr. Part No.62AG22-L0-060C
BrandGrayhill
SGD28.57
Each
units
- Quadrature 2-Bit Gray Code 5V dc 6.32 mm - 17.45mm Panel Mount Flat Center Ribbon Cable with Connector 100rpm 30mA
RS Stock No. 878-0625
Mfr. Part No.61K64
BrandGrayhill
SGD116.24
Each
units
64 Quadrature 2-Bit Quadrature 5V dc 6.32 mm - 18.4mm Surface Mount Flat Pin 300rpm 30 mA @ 5 V dc
RS Stock No. 878-0619
Mfr. Part No.62A22-02-060C
BrandGrayhill
SGD69.16
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 17.44mm Surface Mount Flat Connector 100rpm 30mA
RS Stock No. 878-0565
Mfr. Part No.61RS128-080
BrandGrayhill
SGD133.33
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. 878-0473
Mfr. Part No.62S11-M0-020C
BrandGrayhill
SGD66.85
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. 878-0628
Mfr. Part No.61B11-01-02-020
BrandGrayhill
SGD105.60
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. 878-0555
Mfr. Part No.62A15-02-060C
BrandGrayhill
SGD53.08
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 17.44mm Surface Mount Flat Connector 100rpm 30mA
RS Stock No. 878-0509
Mfr. Part No.62C1111-02-060C
BrandGrayhill
SGD154.36
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 26.98mm Panel Mount Flat Connector 100rpm 50 mA @ 5 V dc