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. 878-0420
Mfr. Part No.62AG22-L5-060C
BrandGrayhill
HK$156.43
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. 182-5672
Mfr. Part No.JT30-120-500
HK$1,154.45
Each
units
- Absolute - 5V dc 6 mm - 15mm - Flat Wire Lead - 40mA
RS Stock No. 878-2750
Mfr. Part No.62S15-M5-250SH
BrandGrayhill
HK$497.58
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.32 mm - 17.45mm Panel Mount Flat Center Ribbon Cable with Stripped End - 25 mA @ 5.25 V dc
RS Stock No. 878-0555
Mfr. Part No.62A15-02-060C
BrandGrayhill
HK$368.38
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 17.44mm Surface Mount Flat Connector 100rpm 30mA
RS Stock No. 878-0445
Mfr. Part No.62AG22-L5-P
BrandGrayhill
HK$173.23
Each
units
- Quadrature 2-Bit Gray Code 5V dc 6.32 mm - 17.45mm Panel Mount Flat Center Pin 100rpm 30mA
RS Stock No. 878-0571
Mfr. Part No.62A22-02-020C
BrandGrayhill
HK$437.38
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 17.44mm Surface Mount Flat Connector 100rpm 30mA
RS Stock No. 202-0443
Mfr. Part No.RE30E-1024-213-1
HK$853.65
Each
units
1024 Incremental Digital Square Wave 5 - 12V dc 4 mm - - Panel Mount Plain Cable - -
RS Stock No. 878-0574
Mfr. Part No.62A11-02-250S
BrandGrayhill
HK$464.88
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 17.44mm Surface Mount Flat Stripped Cable 100rpm 30mA
RS Stock No. 202-0445
Mfr. Part No.RE30E-200-213-1
HK$634.06
Each
units
200 Incremental Digital Square Wave 5 - 12V dc 4 mm - - Panel Mount Plain Cable - -
RS Stock No. 878-0653
Mfr. Part No.60A18-4-060C
BrandGrayhill
HK$684.01
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 14.73mm Panel Mount Flat Connector - 5 (Joystick) mA, 20 mA @ 5 V dc (Rotary)
RS Stock No. 475-6173
Mfr. Part No.REC16B25-201C
HK$171.34
Each
units
25 - Digital Square Wave 5V dc 6 mm 9mm - Through Hole Flat - - -
RS Stock No. 878-0432
Mfr. Part No.62AG11-L5-P
BrandGrayhill
HK$155.53
Each
units
- Quadrature 2-Bit Gray Code 5V dc 6.32 mm - 17.45mm Panel Mount Flat Center Pin 100rpm 30mA
RS Stock No. 878-0543
Mfr. Part No.62A11-02-180S
BrandGrayhill
HK$428.04
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 17.44mm Surface Mount Flat Stripped Cable 100rpm 30mA
RS Stock No. 182-5690
Mfr. Part No.CJ25-82010
HK$651.49
Each
units
5 Incremental Digital Square Wave 5V dc 6.35 mm M17 9.35mm - Round Wire Lead - 20mA
RS Stock No. 202-4403
Mfr. Part No.REC20C-50-201-1
HK$1,990.17
1 Box of 5
Box(es)
50 Incremental Digital Square Wave 5V dc 20 mm - - Panel Mount Slotted - - -
RS Stock No. 878-0527
Mfr. Part No.25LB10-Q
BrandGrayhill
HK$65.14
Each
units
- 2 bit Quadrature Quadrature 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. 182-5633
Mfr. Part No.REC16B50-201-C
HK$169.72
Each
units
50 - Digital Square Wave 5V dc 6 mm M9 16.5mm Through Hole Flat Wire Lead - 30mA
RS Stock No. 878-0561
Mfr. Part No.60A18-4-020C
BrandGrayhill
HK$684.01
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 14.73mm Panel Mount Flat Connector - 5 (Joystick) mA, 20 mA @ 5 V dc (Rotary)
RS Stock No. 878-0505
Mfr. Part No.62C1111-01-060C
BrandGrayhill
HK$739.37
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. 202-4396
Mfr. Part No.REC16L25-205-B
HK$1,032.06
1 Box of 5
Box(es)
25 Incremental Digital Square Wave 5V dc 16 mm - - Through Hole Flat - - -