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庫存編號 878-0521
製造零件編號25LB22-H
BrandGrayhill
HK$62.98
單位
- 2 bit Quadrature Hex 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庫存編號 263-2889
製造零件編號ENA1J-B28-L00128L
BrandBourns
HK$453.82
單位
128 Incremental Digital Square Wave 5V dc 6.35 mm 9.5mm 22.23mm Bracket Mount Round - 3000rpm 26mA
RS庫存編號 167-3613
製造零件編號ENA1J-B28-L00128L
BrandBourns
HK$308.009
Each (In a Tray of 42)
單位
128 Incremental Digital Square Wave 5V dc 6.35 mm 9.5mm 22.23mm Bracket Mount Round - 3000rpm -
RS庫存編號 167-5308
製造零件編號EM14R1D-R20-L032N
BrandBourns
HK$191.121
毎管:25 個
單位
32 Incremental 2 Channel Quadrature 5V dc 6 mm 1.73mm 20mm Through Hole Slotted Axial PC Pin 120rpm -
RS庫存編號 878-0439
製造零件編號62AG22-L0-060C
BrandGrayhill
HK$142.91
單位
- Quadrature 2-Bit Gray Code 5V dc 6.32 mm - 17.45mm Panel Mount Flat Center Ribbon Cable with Connector 100rpm 30mA
RS庫存編號 878-0537
製造零件編號61R128
BrandGrayhill
HK$617.17
單位
128 Quadrature 2-Bit Quadrature 5V dc 6.32 mm - 18.4mm Surface Mount Flat Pin 300rpm 30 mA @ 5 V dc
RS庫存編號 878-0530
製造零件編號25LB22-G
BrandGrayhill
HK$63.24
單位
- Absolute Gray 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庫存編號 878-0448
製造零件編號62AG22-L0-P
BrandGrayhill
HK$155.84
單位
- Quadrature 2-Bit Gray Code 5V dc 6.32 mm - 17.45mm Panel Mount Flat Center Pin 100rpm 30mA
RS庫存編號 167-5492
製造零件編號ENT1J-D28-L00100L
BrandBourns
HK$443.25
Each (In a Tray of 42)
單位
100 Incremental Digital Square Wave 5V dc 7.14 mm 0.99mm 22.23mm Bracket Mount Plain Axial PC Pin 3000rpm -
RS庫存編號 878-0451
製造零件編號61C11-01-08-01
BrandGrayhill
HK$270.29
單位
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 17.45mm Panel Mount Flat PC Pin 16.6 rpm @ 30 mS 30 mA @ 5 V dc
RS庫存編號 789-9510
製造零件編號ENT1J-D28-L00100L
BrandBourns
HK$575.89
單位
100 Incremental Digital Square Wave 5V dc 7.14 mm 0.99mm 22.23mm Bracket Mount Plain Axial PC Pin 3000rpm -
RS庫存編號 789-9497
製造零件編號EM14R1D-R20-L032N
BrandBourns
HK$237.78
單位
32 Incremental 2 Channel Quadrature 5V dc 6 mm 1.73mm 20mm Through Hole Slotted Axial PC Pin 120rpm -
RS庫存編號 182-5668
製造零件編號JT30-340-C00
HK$1,041.82
單位
- Absolute - 12V dc 6 mm - 15mm - Flat Wire Lead - 40mA
RS庫存編號 878-0619
製造零件編號62A22-02-060C
BrandGrayhill
HK$379.87
單位
- Quadrature 2-Bit Quadrature 5V dc 6.35 mm - 17.44mm Surface Mount Flat Connector 100rpm 30mA
RS庫存編號 878-0482
製造零件編號26GSD22-01-1-AJS
BrandGrayhill
HK$223.17
單位
- Quadrature BCD Output, Gray Code, Hexadecimal Code, Octal Code, Quadrature Code, 4 Bit Binary - 3.18 mm - 15.88mm Panel Mount Flat - - -
RS庫存編號 162-2596
製造零件編號EM14A1D-C24-L032N
BrandBourns
HK$201.18
毎管:25 個
單位
32 Incremental 2 Channel Quadrature 5V dc 3.17 mm 1.73mm 19.05mm Through Hole Flat Axial PC Pin 120rpm -
RS庫存編號 878-0599
製造零件編號62V11-01-060C
BrandGrayhill
HK$344.43
單位
- Quadrature 2-Bit Quadrature 3.3V dc 6.35 mm - 17.44mm Surface Mount Flat Connector 100rpm 50mA
RS庫存編號 878-0436
製造零件編號62AG11-L0-P
BrandGrayhill
HK$156.80
單位
- Quadrature 2-Bit Gray Code 5V dc 6.32 mm - 17.45mm Panel Mount Flat Center Pin 100rpm 30mA
RS庫存編號 182-5669
製造零件編號JT30-340-500
HK$891.50
單位
- Absolute - 5V dc 6 mm - 15mm - Flat Wire Lead - 40mA
全新
RS庫存編號 202-0446
製造零件編號RE30E-360-213-1
HK$404.74
單位
360 Incremental Digital Square Wave 5 - 12V dc 4 mm - - Panel Mount Plain Cable - -