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. 878-0656
Mfr. Part No.60A18-8-060C
BrandGrayhill
HK$542.26
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. 878-0476
Mfr. Part No.62S11-M0-050C
BrandGrayhill
HK$390.30
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. 182-5637
Mfr. Part No.REC16A50-201-C
HK$241.40
Each
units
50 - Digital Square Wave 5V dc 6 mm M9 16.5mm Through Hole Flat Wire Lead - 30mA
RS Stock No. 878-0509
Mfr. Part No.62C1111-02-060C
BrandGrayhill
HK$737.65
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. 878-0631
Mfr. Part No.60AR18-4-060C
BrandGrayhill
HK$1,155.23
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm 17.25mm 21.67mm Surface Mount Flat Connector 100rpm 5 (Joystick) mA, 20 mA @ 5 V dc (Rotary)
RS Stock No. 263-2873
Mfr. Part No.ENA1J-B28-L00064L
BrandBourns
HK$357.57
Each
units
64 - Digital Square Wave 5V dc 6.35 mm - 22.23mm Bracket Mount Round - 3000rpm -
RS Stock No. 178-3142
Mfr. Part No.HEDS-5140#A11
BrandBroadcom
HK$111.09
Each (In a Tray of 50)
units
500 Incremental - - 4 mm - - Through Hole - - 30000rpm -
RS Stock No. 167-5490
Mfr. Part No.ENA1D-B28-L00128L
BrandBourns
HK$368.671
Each (In a Tray of 42)
units
128 Incremental Digital Square Wave 5V dc 6.342 mm 0.99mm 22.23mm Bracket Mount Plain Axial PC Pin 3000rpm -
RS Stock No. 878-2750
Mfr. Part No.62S15-M5-250SH
BrandGrayhill
HK$446.73
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. 789-9501
Mfr. Part No.ENT1D-D28-L00100L
BrandBourns
HK$544.06
Each
units
100 Incremental Digital Square Wave 5V dc 3.175 mm 0.99mm 22.23mm Bracket Mount Plain Axial PC Pin 3000rpm -
RS Stock No. 878-0606
Mfr. Part No.62A11-02-060S
BrandGrayhill
HK$406.67
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 17.44mm Surface Mount Flat Stripped Cable 100rpm 30mA
RS Stock No. 789-9488
Mfr. Part No.EM14A1D-C24-L032N
BrandBourns
HK$189.00
Each
units
32 Incremental 2 Channel Quadrature 5V dc 3.17 mm 1.73mm 19.05mm Through Hole Flat Axial PC Pin 120rpm -
RS Stock No. 182-5675
Mfr. Part No.JT22-120-C00
HK$492.93
Each
units
- Absolute - 12V dc 3 mm M9 8mm - Flat Wire Lead - 40mA
RS Stock No. 878-0599
Mfr. Part No.62V11-01-060C
BrandGrayhill
HK$371.89
Each
units
- Quadrature 2-Bit Quadrature 3.3V dc 6.35 mm - 17.44mm Surface Mount Flat Connector 100rpm 50mA
RS Stock No. 878-0460
Mfr. Part No.62S22-M5-020C
BrandGrayhill
HK$364.73
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. 878-0596
Mfr. Part No.62S11-M5-100CH
BrandGrayhill
HK$450.23
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. 878-0587
Mfr. Part No.62R30-01-P
BrandGrayhill
HK$822.17
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 17.45mm Panel Mount Flat Pin 100rpm 30 mA @ 5 V dc
RS Stock No. 475-6173
Mfr. Part No.REC16B25-201C
HK$234.76
Each
units
25 - Digital Square Wave 5V dc 6 mm 9mm - Through Hole Flat - - -
RS Stock No. 878-0489
Mfr. Part No.62S11-M5-050C
BrandGrayhill
HK$317.77
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. 134-8141
Mfr. Part No.ES14A0D-E28-L032N
BrandBourns
HK$404.345
Each (In a Tube of 25)
units
32 Quadrature 2-Bit Quadrature 5V dc 3.18 mm 1.73 mm, 14 mm 22.23mm Bracket Mount Slotted Axial PC Pin 1000rpm 26mA
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