Why? question about optical encoder

  • Thread starter Thread starter engineer23
  • Start date Start date
  • Tags Tags
    Encoder Optical
Click For Summary
SUMMARY

The outermost ring of an optical encoder represents the least significant bit (LSB) due to its greater circumference, allowing for more lines to be scribed, which enhances sensor resolution. This design choice is intrinsically linked to the concept of sensor resolution rather than frequency alone. The discussion also highlights the use of Gray code in optical encoders, where the two least significant bits maintain the same frequency but are 90 degrees out of phase, a principle reminiscent of early mouse encoders.

PREREQUISITES
  • Understanding of optical encoders and their components
  • Knowledge of sensor resolution concepts
  • Familiarity with Gray code and its applications
  • Basic principles of phase relationships in signal processing
NEXT STEPS
  • Research the principles of optical encoder design and functionality
  • Explore the implementation of Gray code in digital systems
  • Study the relationship between sensor resolution and encoder performance
  • Investigate phase modulation techniques in signal processing
USEFUL FOR

Engineers, robotics developers, and anyone involved in designing or utilizing optical encoders in their projects will benefit from this discussion.

engineer23
Messages
68
Reaction score
0
Why is the outermost ring of an optical encoder the least significant bit? Is this somehow related to frequency?
 
Engineering news on Phys.org
There is more length in the outside ring.
For a sensor of any given resolution the wider the disk the more lines that can be scribed on it.
While in a way this relates to frequency, it is more about sensor resolution.
 
just curious, does your optical encoder use Gray code? it should. if it does, the two LSBs (of Gray code) will have the same "frequency" but will be 90o outa phase. just like the encoders of the earlier mice.
 

Similar threads

Problems With Optical Encoders: Errors & Solutions
  • · Replies 2 ·
Replies
2
Views
2K
Fiber Optics Qs: Mini-DIO, Fusion, Fanout Cable
  • · Replies 2 ·
Replies
2
Views
2K
Stargazing Fixing declination runaway on a Meade LX200 telescope
  • · Replies 6 ·
Replies
6
Views
5K
Cannot lock reference signal on lock-in amplifier
  • · Replies 5 ·
Replies
5
Views
3K
Frequency Comb (Photonics, Optics)
  • · Replies 3 ·
Replies
3
Views
1K
Minimum Frequency of FM Data / Catastrophic Error Scenario?
  • · Replies 68 ·
3
Replies
68
Views
6K
Graduate Do entanglement networks encode a unique, local historical record?
  • · Replies 2 ·
Replies
2
Views
2K
Comp Sci Binary Encoding for 16 Bit Architecture
  • · Replies 10 ·
Replies
10
Views
2K
Solving Delays in 8:3 Encoder Design with Verilog
  • · Replies 1 ·
Replies
1
Views
2K
Understand the concept of bandwidth
  • · Replies 24 ·
Replies
24
Views
3K