Consider the following statements regarding Optical encoders,
1) Optical encoders converts the linear motion or angular displacement into digital signals.
2) Absolute encoders are used to sense actual position with respect to fixed frame of reference.
3) Incremental encoders are used to sense the actual position with respect to the previous position.
Which of the above statements are true?
1
1 and 3
2
1 and 2
3
2 and 3
4
1, 2 and 3