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. 475-6151
Mfr. Part No.REC16A25-201C
PHP1,128.81
Each
units
25 - Digital Square Wave 5V dc 6 mm 9mm - Through Hole Flat - - -
RS Stock No. 878-0669
Mfr. Part No.60AD18-8-M-060C
BrandGrayhill
PHP4,339.13
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 14.78mm Panel Mount Flat Connector 100rpm 5 (Joystick) mA, 20 mA @ 5 V dc (Rotary)
RS Stock No. 878-0596
Mfr. Part No.62S11-M5-100CH
BrandGrayhill
PHP2,557.07
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. 878-0436
Mfr. Part No.62AG11-L0-P
BrandGrayhill
PHP1,123.52
Each
units
- Quadrature 2-Bit Gray Code 5V dc 6.32 mm - 17.45mm Panel Mount Flat Center Pin 100rpm 30mA
New
RS Stock No. 215-5737
Mfr. Part No.AEDR-8723-102
BrandBroadcom
PHP1,699.87
Each
units
- Incremental - - - - - Surface Mount - - - -
RS Stock No. 878-0587
Mfr. Part No.62R30-01-P
BrandGrayhill
PHP5,972.40
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. 878-2750
Mfr. Part No.62S15-M5-250SH
BrandGrayhill
PHP2,965.60
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. 878-0505
Mfr. Part No.62C1111-01-060C
BrandGrayhill
PHP4,406.63
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. 878-0577
Mfr. Part No.62A11-02-P
BrandGrayhill
PHP1,782.74
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.32 mm - 17.42mm - Flat Pin 100rpm 30mA
RS Stock No. 475-6145
Mfr. Part No.REC16A25-201
PHP881.85
Each
units
25 - Digital Square Wave 5V dc 6 mm 9mm - Through Hole Flat - - -
RS Stock No. 878-0537
Mfr. Part No.61R128
BrandGrayhill
PHP4,065.52
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. 202-4409
Mfr. Part No.RES20D-50-201-1
PHP4,656.62
1 Box of 5
Box(es)
50 Incremental Digital Square Wave 5V dc 20 mm - - Panel Mount Slotted - - -
RS Stock No. 878-0509
Mfr. Part No.62C1111-02-060C
BrandGrayhill
PHP5,377.58
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 26.98mm Panel Mount Flat Connector 100rpm 50 mA @ 5 V dc
New
RS Stock No. 213-1687
Mfr. Part No.DMS22B5A1CAFL336N
BrandBourns
PHP2,338.402
Each (In a Tray of 50)
units
12 bit - - 5V dc 22.225 mm - - - Flat - - -
RS Stock No. 878-0559
Mfr. Part No.60A00-4-020C
BrandGrayhill
PHP3,668.90
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. 789-9501
Mfr. Part No.ENT1D-D28-L00100L
BrandBourns
PHP3,462.59
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. 167-3613
Mfr. Part No.ENA1J-B28-L00128L
BrandBourns
PHP1,949.44
Each (In a Tray of 42)
units
128 Incremental Digital Square Wave 5V dc 6.35 mm 9.5mm 22.23mm Bracket Mount Round - 3000rpm -
RS Stock No. 878-0533
Mfr. Part No.62A22-02-100S
BrandGrayhill
PHP2,698.92
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 17.44mm Surface Mount Flat Stripped Cable 100rpm 30mA
RS Stock No. 134-8141
Mfr. Part No.ES14A0D-E28-L032N
BrandBourns
PHP2,767.28
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
RS Stock No. 789-9504
Mfr. Part No.ENA1D-B28-L00128L
BrandBourns
PHP2,730.97
Each
units
128 Incremental Digital Square Wave 5V dc 6.342 mm 0.99mm 22.23mm Bracket Mount Plain Axial PC Pin 3000rpm -