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. 202-4397
Mfr. Part No.REC16L25-205-B
PHP1,486.91
Each
units
25 Incremental Digital Square Wave 5V dc 16 mm - - Through Hole Flat - - -
RS Stock No. 182-5634
Mfr. Part No.REC16B50-201
PHP1,441.05
Each
units
50 - Digital Square Wave 5V dc 6 mm M9 16.5mm Through Hole Flat Wire Lead - 30mA
RS Stock No. 202-0445
Mfr. Part No.RE30E-200-213-1
PHP2,888.75
Each
units
200 Incremental Digital Square Wave 5 - 12V dc 4 mm - - Panel Mount Plain Cable - -
RS Stock No. 878-0561
Mfr. Part No.60A18-4-020C
BrandGrayhill
PHP3,996.83
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. 878-0445
Mfr. Part No.62AG22-L5-P
BrandGrayhill
PHP1,129.92
Each
units
- Quadrature 2-Bit Gray Code 5V dc 6.32 mm - 17.45mm Panel Mount Flat Center Pin 100rpm 30mA
RS Stock No. 182-5632
Mfr. Part No.REC16K25-201
PHP841.208
Each (In a Tray of 20)
units
25 - Digital Square Wave 5V dc 6 mm M9 16.5mm Through Hole Flat Wire Lead - 30mA
RS Stock No. 878-0653
Mfr. Part No.60A18-4-060C
BrandGrayhill
PHP3,996.83
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. 182-5637
Mfr. Part No.REC16A50-201-C
PHP1,245.09
Each
units
50 - Digital Square Wave 5V dc 6 mm M9 16.5mm Through Hole Flat Wire Lead - 30mA
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. 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. 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. 202-4398
Mfr. Part No.REC16D25-205-B
PHP4,633.07
1 Box of 5
Box(es)
25 Incremental Digital Square Wave 5V dc 16 mm - - Panel Mount Flat Connector - -
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
RS Stock No. 878-0470
Mfr. Part No.62S11-M5-020C
BrandGrayhill
PHP2,628.23
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
New
RS Stock No. 213-1688
Mfr. Part No.DMS22B5A1CAFL336N
BrandBourns
PHP3,765.06
Each
units
12 bit - - 5V dc 22.225 mm - - - Flat - - -
RS Stock No. 878-0524
Mfr. Part No.62C2211-02-060C
BrandGrayhill
PHP4,771.85
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. 878-0458
Mfr. Part No.62S22-M0-020C
BrandGrayhill
PHP2,474.55
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. 182-5697
Mfr. Part No.REC16K25-201
PHP897.29
Each
units
25 - Digital Square Wave 5V dc 6 mm M9 16.5mm Through Hole Flat Wire Lead - 30mA
RS Stock No. 167-5490
Mfr. Part No.ENA1D-B28-L00128L
BrandBourns
PHP2,225.727
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. 878-0577
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