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. 878-0603
Mfr. Part No.62A11-02-060C
BrandGrayhill
HK$350.77
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 17.44mm Surface Mount Flat Connector 100rpm 30mA
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. 878-0600
Mfr. Part No.62A15-02-060S
BrandGrayhill
HK$396.60
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 17.44mm Surface Mount Flat Stripped Cable 100rpm 30mA
RS Stock No. 134-8198
Mfr. Part No.ES14A0D-E28-L064N
BrandBourns
HK$589.86
Each
units
64 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. 182-5628
Mfr. Part No.RESW20D-25-201-1
HK$170.27
Each
units
25 - Digital Square Wave 5V dc 6 mm M9 12mm - Round Wire Lead - 50mA
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 - - -
New
RS Stock No. 213-1688
Mfr. Part No.DMS22B5A1CAFL336N
BrandBourns
HK$582.98
Each
units
12 bit - - 5V dc 22.225 mm - - - Flat - - -
RS Stock No. 182-5697
Mfr. Part No.REC16K25-201
HK$156.69
Each
units
25 - Digital Square Wave 5V dc 6 mm M9 16.5mm Through Hole Flat Wire Lead - 30mA
RS Stock No. 878-0476
Mfr. Part No.62S11-M0-050C
BrandGrayhill
HK$412.67
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. 878-2750
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. 878-0622
Mfr. Part No.61KS64-020
BrandGrayhill
HK$826.70
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. 178-3264
Mfr. Part No.HEDS-6140#B09
BrandBroadcom
HK$253.867
Each (In a Box of 100)
units
1000 Incremental - - 0.5 in - - Through Hole - - 30000rpm -
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. 182-5638
Mfr. Part No.REC16A50-201
HK$211.77
Each
units
50 - Digital Square Wave 5V dc 6 mm M9 16.5mm Through Hole Flat Wire Lead - 30mA
RS Stock No. 182-5632
Mfr. Part No.REC16K25-201
HK$146.906
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. 878-0495
Mfr. Part No.25LB15-Q
BrandGrayhill
HK$70.89
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. 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. 182-5669
Mfr. Part No.JT30-340-500
HK$1,104.96
Each
units
- Absolute - 5V dc 6 mm - 15mm - Flat Wire Lead - 40mA
New
RS Stock No. 215-5737
Mfr. Part No.AEDR-8723-102
BrandBroadcom
HK$281.67
Each
units
- Incremental - - - - - Surface Mount - - - -
RS Stock No. 878-0580
Mfr. Part No.62N22-P
BrandGrayhill
HK$749.70
Each
units
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 26.9mm Panel Mount Flat Pin 100rpm 30 mA @ 5 V dc